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1Plasma Display Panel Troubleshooting - 2007
60PC1D
Training PresentationAdvanced Dual Scan PDP Troubleshooting
2Plasma Display Panel Troubleshooting - 2007
Contact Information
Customer Service (and Part Sales) (800) 243-0000Technical Support (and Part Sales) (800) 847-7597
USA Website (GCSC) aic.lgservice.comCustomer Service Website us.lgservice.com
LG CS Academy lgcsacademy.com
Published March 2007 by LG Technical Support and Training
Troubleshooting
3Plasma Display Panel Troubleshooting - 2007
Preliminary Matters (The Fine Print)IMPORTANT SAFETY NOTICE
The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product, personal injury and property damage can result. The manufacturer or seller maintains no liability for the interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.
Troubleshooting
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Preliminary Matters (The Fine Print)
CAUTION
To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be aware that many household products present a weight hazard. At least two people should be involved in the installation or servicing of such devices. Failure to consider the weight of the product could result in physical injury.
Troubleshooting
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Preliminary Matters (The Fine Print)
ESD NOTICE
Some of the electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage the electronics in a manner that renders them inoperative or reduces the time until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before removing a replacement part from its package, touch the anti-static bag to a ground connection point or unpainted metal in the product. Handle the electronic controlassembly by its edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.
Troubleshooting
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Preliminary Matters (The Fine Print)REGULATORY INFORMATION
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help.
Troubleshooting
7Plasma Display Panel Troubleshooting - 2007
Preliminary Matters (The Fine Print)
COMPLIANCE
The responsible party for this device’s compliance is:
LG Electronics Alabama, Inc. 201 James Record Road, Huntsville, AL, 35824.
Troubleshooting
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Safety & Handling Regulations
1. Check the appearance of Panel and boards.
2. Check the model label. Verify model names and board model matches.
3. Check details of defective condition and history.
Ex) COF long 2-1 fail, address 1 line open, Y b/d trouble, Mal-discharge on screen.
1. Approximately 10 minute pre-run time is required before any adjustments are performed.
2. Do not adjust for higher or lower voltage ( Refer to Voltage Sticker inside the Panel ) than is specified for the product.
3. Be cautious of electric shock from the PDP module since the PDP module uses high voltage, it is recommended that you
should not touch the Power Supply or Drive circuits for at least one minute because of residual current stored.
4. C-MOS circuits are used extensively for processing the Drive Signals and should be protected from static electricity.
5. The PDP Module must be carried by two people.
6. Be careful of short circuits when measuring voltages.
7. Be cautious of screws and other metal objects to prevent a short in the circuitry.
Checking Point before Requesting MODULE Repair
Safety Rules PLASMA Overview Troubleshooting
9Plasma Display Panel Troubleshooting - 2007
Troubleshooting StepsDefine, Localize, Isolate and Correct
• Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc.
• Localize After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.
• Isolate To further isolate the failure check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.
• Correct The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer.
Troubleshooting
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Overview of Topics to be Discussed
•Y SUS Board
•Z SUS Board•Y Drive Board
•Control Board•X Drive Boards
2. Circuit Board Operation, Troubleshooting and Alignment :
Troubleshooting
1. Disassembly Instructions, Circuit Board Layout, and Identification
•Switch mode Power Supply
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This section of the manual will discuss Disassembly, Layout and Circuit Board Identification, of the 60PC1D Dual Scan Plasma Display Panel.
Troubleshooting
Upon completion of this section the Technician will have a betterunderstanding of the disassembly procedures, the layout of the printedcircuit boards and be able to identify each board.
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Disassembly Procedure 60PC1D
Troubleshooting
To remove the Back Cover remove the 40 screws as shown ( the stand will not need to be removed )
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Troubleshooting60PC1D First Generation
Control Board
SMPS Board6709V00016A
Y SUSBoard
Z SUSBoard
AC/DC Board
6709V00018A
Main BoardEBT32634401
Y DriveBoards
Top X Boards
Bottom X BoardsBottom X Boards
Circuit Board Layout
PFC / Standby6709V00017ASTB
Supply
Note : The Power Supply Circuit consists of 3 PCBs in Generation 1 and 2 PCBs in Generation 2
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60PC1D Second GenerationCircuit Board Layout Troubleshooting
SMPSEAY32961901
Control BoardEBT32929501
PFC / StandbyEAY32961801
Note: The Early Version prior to ( March / April 2007 ) had theAC/DC Supply Board in this Position
The Power Supply and Control Boards are not interchangeableFrom one Generation to the other.
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Input Jacks
Troubleshooting60PC1DCircuit Board Layout
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TroubleshootingDisassembly Procedure 60PC1D
AC/DC Board Removal
Remove Cables P801 ( AC Input Cable ), P8015A ( P-CTL, Rush, 12V ), P8017A ( PFC B+, B- ) andP8016A ( Standby B+, AC Detect ). Remove 6 screws securing the Board.
Power Supply PFC (pulse Frequency coefficient) Board Removal
Remove Cables P8017B ( PFC B+, B- ), P8016B ( Standby B+, AC Detect ), P8015B ( P-CTL, RUSH, 12V ),P801A ( AC ON, P- CTL, ST 5V, GND, VS ON, 5V MNT, POD ), P804 ( 5V MNT, POD, GND, RUSH, VSON ),and P803A ( PFC+, AC GND, 18V ). Remove 6 screws securing the Board.
SMPS Board Removal
Remove Cables P803B ( PFC B+, AC GND, 18V ), P804B ( POD, GND, RUSH, VSON ), P801B ( 19V, 19V,GND, GND, 6V, GND, 3.4V, GND, 12V, GND ), P800B ( 3.4V, 3.4V, GND, GND, 6V, 6V, GND, GND,12V, 12V, GND, GND ), P8012 ( 5VDC, GND ), and P8011 ( VA, GND, VS ). Remove 8 screws securing the Board.
Z SUS Board Removal
Remove Cables P12 ( 5V, 5V, GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P1 (GND, GND, 5V, VA ),P9 ( GND, GND, 5V, VA). Remove 7 screws securing the Board.
PC Boards appearing on this list Contain CMOS Semi Conductors and are ESD Sensitive
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Disassembly Procedure 60PC1D Troubleshooting
Y SUS Board Removal
Remove Cables P1 ( VS, VS, NC, GND, GND, GND, GND, VA, VA ), P2 ( GND, GND, 5VDC, 5VDC ) P3 ( GND, GND, GND, GND, 5VDC, 5VDC, 5VDC, 5VDC ), P4 ( Logic Signals ), P5 ( 5VDC, 5VDC,GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P6 ( GND, GND, 5VDC, VA ),P7 ( GND, GND, 5VDC, VA ), P8 ( SUS_ DNT, 15V, 15V, SUS_ DNT, OC1_T_IN, OC2_T_IN, LET, NC,SUS_DNT, DATA_T, CLKT_IN, SUS_DNT ), P10 ( SAME AS P8 ). Remove 14 screws securing the Board.
Control Board Removal
Remove Cables P101, P102, P103, P104, P105, P106, ( RGB Logic Signals ), P200 ( Y SUS Logic Signals ),P300 ( 5VDC, 5VDC, 5VDC, 5VDC, GND, GND, GND, GND ). Remove 5 screws securing the Board.
Top Y Drive Board Removal
Remove 10 Screws from the Metal Bracket marked “A” ( see page 19 ) to gain access to the Top Y Drive Board. Carefully remove the Ribbon Cables P8, P9, P12, P13, P14, P15 and Connectors P2 ( Refer to P8 on the Y SUS Board ), and P4 ( Floating Ground ). Remove 5 screws securing the Top Y Drive Board.
Bottom Y Drive Board Removal
Remove 10 screws from the Metal Bracket marked “A” ( see page 18 ) to gain access to the BottomY Drive Board. Carefully remove the Ribbon Cables P6, P7, P16, P19, P20, P21 and Connectors P1 ( Refer to P8 on the Y SUS Board ) and P3 ( Floating Ground ). Remove 5 screws securing the BottomY Drive Board.
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Disassembly Procedure 60PC1D Troubleshooting
Top Middle X Drive Board Removal
X Board Removal will require the most disassembling of the unit as the Stand will need to beremoved. Refer back to page 19 and everything marked with a B will need to be removed tochange the X Boards. Start by laying the unit down on a table covered by a soft pad, be carefulnot to scratch the screen, and remove the Stand. Two large screws recessed in Lower Chassis
Assembly will need to be removed to get the stand removed. After the Stand the Lower Chassis Assembly which includes the Main Board will need to be removed.
The Main Board is part of the Lower Chassis and will not need to be separated from the assembly, to remove the assembly, connectors P4004 ( from P 801A ), P4005 ( from P101B ), P4003 ( from P800B ), P4007 ( from the Keyboard ), P5002 ( from the Side Input Jacks ), P7009 and 7010 ( Speakers ),P6007 ( Y SUS Fan ) and P6009 ( Main Fan ), and last the LVDS Cable ( care must be taken as the LVDS Cable is very fragile ), will need to be removed. Remove the 9 screws securing the Lower Chassis Assembly and the AC Input Grounding Screw disconnect P801 ( AC Input )from the AC/DC Supply Board and lift the Assembly clear place it in a secure location.
Care must be taken as there are different size screws with different thread design
Remove the 6 screws ( ea ) securing both Wall Mounting Support Brackets and set them aside. Remove the 4 mounting screws for the Cooling Fan disconnect the connector and set it aside. Access is nowavailable to remove the screws from the brackets that hold the TCP IC’s and Ribbons in place. Remove the brackets, being careful not to damage the Ribbon Cables, last remove the Ribbon Cablesand screws from the X Board to be replaced.
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A
A
A
TroubleshootingDisassembly Procedure 60PC1D
BB
B
BB
B BB
BBB
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Z SUS Board
Top X Drive Boards
5v, VA, VS
VA, VS
5v
5v, VA
5v, VA
Switch Mode Power Supply
Y SUS Board
Bottom X Drive Boards
ControlBoard
5v, VA
5v
5v, VARGBLogic Signals
RGBLogic Signals
Logic Signals
5v, VA
Y Drive Top
5V, VA
Y Drive Bottom
Logic Signal
Logic Signal
Signal and Voltage Distribution for the 60PC1
5V, VA
5V, VA
5v, VA
RGBLogic Signals
Troubleshooting
AC/ DCPowerSupply
PFCSupply
STB
MainBoard
LVDS
ON OFFCONTROL
Y DriveSignal
5V, VA
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P208 P207 P206 P201
P211
P209 P210
P106 P105 P102
P109P110
P303 P304 P306
P309
P301
P604 P603 P602
P601
P608
P507 P505 P502
P509 P510P511
P404 P403 P402
P411P410
P200
P300 P101 P102 P103
P104 P105 P106
P8011
P8012
P800B
P101B
VR8501 VS
VR8401 VA
IC7SUS-IPM
IC2ER-IPM
P9
P1P12
IC7SUS-IPM
IC2ER-IPM
P7
P6 P5
P1
P2
P3
P4
P4005P4004
P308
P3
P5
P6
IC45
Front Key PCB
P111 P212
P3
P10P1
P8P2 P2
P803AP804A
P801A
P8017BP8016B
P8015B
P8017A
P8015A
P8016A
P801
P4003P6008 P6007
P6009
P7009
P7010
P5002
P4007
P804BP803B
P409 P512
P202P203P204P205P108 P107 P104 P103 P101
P503 P501 P607 P606 P605
P307P305P302
P401 P508 P506 P504P408 P407 P406 P405
Tuner
P15
P6
P7
P8
P9
P12
P13
P14
P21
P16
P19
P20
P4 P1
TP1
TP19
D2
D1
Ramp_up – TP38SW – TP37
Ramp_dn – TP36Set_dn – TP35Pass_B – TP34
Pass_Top – TP33VSC – TP32
Pass_1 – TP31OC1 – TP30LEB – TP29LET – TP28
B Data – TP27B Clock – TP26T Data – TP25T Clock – TP24
ER_up – TP23ER_dn – TP22Sus_up – TP21Sus_dn – TP20
R1Out 00 – 13TP 39 - 52
G1Out 00 – 13TP 53 - 66
B1Out 00 – 13TP 67 - 80
R2Out 00 – 13TP 81 - 94
G2Out 00 – 13TP 95 - 108
B2Out 00 – 13TP 109 - 122
Addr_STB – TP 131Mis_Flag_Out – TP 130VS-DA – TP 129Blank_DA – TP 128RAS_Data1 – TP 127RAS_Data2 – TP 126RAS_STB1 – TP 125*Solder filled TP – TP 124RAS_STB2 – TP 123
Pin1 to 8 - TP132Pin 9 to 12 - TP133
All = TP133
Pin 1 = TP134 to 145.
TP148- TP177
STBY Run STBY Run STBY Run STBY Run STBY Run1 4.9v 4.9v AC-ON 1 0 379.5v PFC+ 1 0 2.6v 5V MNT 1 11.7v .7v P CTL 1 155V 155V ST-BY B+2 0 3.7v P-CTL 2 0 379.5v PFC+ 2 0 2.5v POD 2 11.7v .7v Rush 2 18V 18V ST-BY B-3 5.0v 5.0v ST-5V 3 0 0 NC 3 0 0 GND 3 12v 12v 12v4 0 0 GND 4 0 0 GND 4 0 8.1v Rush5 0 2.7v V SON 5 0 0 GND 5 0 2.6 V SON6 0 2.7v 5V MNT 6 0 0 NC7 0 2.6v POD 7 0 0 GND
8 024v 17.5v 18V
P8015BP801A P803A P804A P8015B
1 19.5v 19V 1 3.4v 3.4V 1 379.5v PFC B+ 1 60v VA 1 5v 5V2 19.5v 19V 2 3.4v 3.4V 2 379.5v PFC B+ 2 60v VA 2 5v 5V3 0 GND 3 0 GND 3 0 NC 3 0 GND 3 GND GND4 0 GND 4 0 GND 4 0 GND 4 0 GND 4 GND GND5 5.8v 6V 5 5.8v 6V 5 0 GND 5 0 GND6 0 6V 6 5.8v 6V 6 0 PF COK 6 0 NC7 3.4v 3.4V 7 0 GND 7 0 GND 7 193V VS8 0 GND 8 0 GND 8 17.8v 16V 8 193V VS9 12v 12V 9 12v 12V 9 193V VS10 0 GND 10 12v 12V
11 0 GND12 0 GND
P8011 P8012P101B P800B P803B
1 19.75v P+19V 1 4.95v AC-DST 1 3.4v 3.3V STBY RUN2 19.75v P+19V 2 3.7v RL-ON 2 3.4v 3.3V 1 2.6v 03 0 GND 3 5.0v ST-5V 3 0 GND 2 0 3.3v4 0 GND 4 0 GND 4 0 GND 3 0 05 5.8v NC 5 2.7v INV I/O 5 5.8v 6.0V 4 5.0v 5.0v6 0 GND 6 2.7v 5V HNT 6 5.8v 6.0V 5 0 07 3.4v 3.3V 7 2.5 POD/INV 7 0 GND 6 4.0v 4.0v8 0 GND 8 0 ST-5V 8 0 GND 7 0 09 12.1v NC 9 0 GND 9 12.1v 12.0V 8 3.4v 3.4v10 0 GND 10 0 PWM 10 12.1v 12.0V 9 0 0
11 0 46.0V 11 0 GND 10 3.4v 3.4v12 0 GND 12 0 GND13 0 LIVE ON
P4003 P4004 P4005 P40071 193v VS 1 0 GND 1 0 1 1.5v 1 5.0v 1 0 GND 1 0 GND2 193v VS 2 0 GND 2 0 2 .43v 2 5.0v 2 0 GND 2 0 GND3 193v VS 3 5.2v 5V 3 0 3 0 3 0 3 4.8v 5V 3 4.8v 5V4 0 GND 4 5.2v 5V 4 0 4 0 4 0 4 0 NC 4 0 NC5 0 GND 5 5v 5 0 5 0 5 59.8v VA 5 59.8vVA6 0 GND 6 5v 6 0 6 07 60v VA 7 5v 7 0 7 08 60v VA 8 5v 8 0 8 .2v
9 0 9 59.9v10 0 10 59.9v11 0 11 193.1v12 4.6v 12 193.1v13 1.9v14 015 2.6v
P7P4 P5P1 P2 P3 P6
STBY RUN STBY RUN STBY RUN1 12VDC 12VDC 1 155VDC 155VDC 1 0 VDC 99.5VDC2 11.7VDC 0.7VDC 2 18VDC 18VDC3 11.7VDC 0.7VDC
P8016AP8015A P8017A
1 0 GND 1 0 1 0 GND 1 5.0v2 0 GND 2 .3v 2 0 GND 2 5.0v3 5v 5V 3 .3v 3 5v 5+ 3 04 0 NC 4 .48v 4 0 NC 4 05 59.5v VA 5 0 5 60.0v VA 5 0
6 0 6 07 0 7 08 3.0v 8 .2v9 0 9 59.9v10 1.85v 10 59.9v11 0 11 193v12 0 12 193v
P9P1 P2 P12
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P309
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P1
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P608
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P9
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P7
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P410
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P6
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P110
VSET UP
VSET DN
VSC
-VY
VR! Vsetup
R60
VSC TP
Y SUS TP178
IC42IC46
IC44 IC24
IC4013IC4008
VR88013.3V
VR801
P8201 NC
Pin 1 Pin 2 Pin 3IC24 5.0v 2.4v 0IC42 5.0v 1.7v 0IC44 5.0v 3.2v 0IC45 5.0v 3.2v 0IC46 5.0v 3.2v 0
Pin 1 Pin 2 Pin 3 Pin 4 Pin 5IC4008 3.3v 3.3v 0 1.1v 2.5vIC4013 5.7v 3.1v 4.9v 0 0
P5002 NC
TP 0 – Y&Z SUS in sync
Z_SUS TP179
TP 0 – Y&Z SUS in sync
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P111, P212
VR88025VDC
1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA
P409, P512
Z-BIAS
R168GND-VY Test point
TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180
TP180TP180TP180
TP180TP180TP180TP180TP180
TP180
TP181
TP181
TP181
TP181
TP181
TP181
TP181
TP181
TP181
TP181
TP181
TP181
Troubleshooting60PC1D Interconnect- Test Point Location and Voltage Chart
22
TP0
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
TP20
TP21
TP22
TP23
TP24
TP25
TP26TP27
TP28
TP29
TP30
23
TP31
TP32
TP33
TP34
TP35
TP36
TP37
TP38
TP39
TP40
TP41
TP42
TP43
TP44
TP45
TP46
TP47
TP48
TP49
TP50
TP51
TP52
TP53
TP54
TP55
TP56
TP57
TP58
TP59
TP60
24
TP64
TP65
TP66
TP67
TP68
TP69
TP70
TP63
TP62
TP61 TP71TP72TP73
TP74
TP75
TP79
TP78
TP81
TP82
TP83
TP84
TP86
TP87
TP88
TP89
TP90
TP91
TP76
TP77
TP80
TP85
TP92
TP93TP94
TP95
25
TP99
TP100
TP98
TP97
TP96 TP101
TP102
TP103
TP104
TP105
TP106
TP107
TP108
TP111
TP113
TP114
TP115
TP117
TP118TP119TP120
TP123
TP124
TP109
TP110
TP112
TP116
TP125TP126
TP127TP121
TP122 TP128
26
TP132
TP133
TP131
TP130
TP129 TP134
TP135
TP136
TP137
TP138
TP139TP140
TP141
TP145
TP147
TP148PIN 1
TP149PIN 2
TP151PIN 4
TP152PIN 5
TP155PIN 8
TP156PIN 9
TP142
TP143
TP146
TP150PIN 3
TP157PIN 10
TP158PIN 11
TP153PIN 6
TP154PIN 7
TP159PIN 12
TP144
LVDS Cable pin 1 is GND
27
TP163PIN 16
TP164PIN 17
TP162PIN 15
TP161PIN 14
TP160PIN 13
TP165PIN 18
TP166PIN 19
TP167PIN 20
TP168PIN 21
TP169PIN 22
TP170PIN 23
TP171PIN 24
TP175PIN 28
TP177PIN 30
TP178
TP179
TP172PIN 25
TP173PIN 26
TP176PIN 29
TP174PIN 27
TP180
TP181
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Always refer to the Voltage Sticker located in the upper right side of the PDP for the correct operating voltage levels for the DC 5V, VA, VS ( Power Supply Voltages ),V SET UP, -VY, VSC, ( Y SUS Voltages ) and Z Bias ( Z SUS Voltage ) as they will vary from Panel to Panel.
V SET_UPVSC
Model : PDP 60X6#### All Voltage : DC 5VVa : 60V Vs : 193V250 / -65 / 110 / NA / 170Max Watt : 570 W ( Full White )
Z_BIAS-VY
60PC1D Plasma Display
Important Note
Troubleshooting
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Troubleshooting60PC1D Second GenerationCircuit Operation
The ON/ OFF Command for the Power Supply is developed on the Main Board, see page 30, and when the set is turned on, a high is applied as to the Base of Transistor Q 234. Transistor Q 234 Collector goes low causing the Gate of U241 to go low.With a low on the Gate of U241 the Cathode voltage will rise tuning off the Photo Coupler PC201 resulting in less feedbackto Pin 2 of U151, see page 31, and more output voltage to develop at the secondary side of the supply. The 6.5V Supply is sampled to provide feedback correction by the resistor network of resistors R234, R238, and R233 and sent to the Gate of U241were it is used to control the conduction of U241, and PC201, finally controlling Pin 2 of U151 by either increasing ordecreasing the feedback.
IC151 is the Power Regulator IC, start up voltage is developed from resistor R167, the Run Line used to maintain operation is Supplied by the circuit of D156, Q152, R151, ZD151, D153 and R160, see page 31, highlighted in yellow. The Power RegulatorTransformer T201 supplies the Power FET Q151 Drain. Q151 is protected by the snubber circuit of D152, C151, and R155from any back EMF caused by Transformer T201. The Gate of Q151 is driven by IC151, R154, R153,and D151. TransistorQ151 Source returns to ground via Current Sense Circuit ( Highlighted in Red on page 32 ) at Resistor R157. OCP (Over Current Protect ) is developed by monitoring the increased voltage drop across R157 and sending it to pin 3 of IC151 to shutdown the regulator circuit in the event of an Over Current Condition.
Over Voltage protection ( Highlighted in Blue on Page 31 ) is accomplished if the break over voltage across Diode Z152 increases turning on Q153 causing diode D154 to turn on lowering the voltage to both Pin 2 of IC151, causing the secondary voltage at T201 to lower, and the Base of Q152 to lower, which lowers the VCC voltage at Pin 6 of IC151 thereby shuttingdown the Power Supply.
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C24
1
C24
2
C24
0
C24
4
On / OffFrom Micro
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OVP
To Photo Coupler IC PC210
Start Resistor
Current Sensing Resistor
32Plasma Display Panel Troubleshooting - 2007
R158
R161
R157
R155
R153
R154
R167
R152
C154 C151
D152D151
R159
R166
R160 R151
D156
C157ZD151C156
C155
C158
D154D154
C158
D153
ZD152
Q153
Q152
Q151
U151
ZD153
D185
T201
ADJ
FB
SENCE
GND
HV
GATE
VCC
VCC2VCC1
STBY Input
C24
1
C24
2
C24
0
C24
4
L231
Q234
R234
R235
RL1
R254
C235
R243
R244 R245
U241
R233
6.5VDC
C243
PC201
R238
K
A
D
R202
D201
C201
R215
Q206
T201
R206
Q201R205
C202
Q202
C207R204
R203
C205
R213
R210
R201C203
Q204
C204
R217
T201
R230
R231
C223
R222
C208 ZD201
D202
R212
R211
T201
T201
L251Q270
Q233
C222
D222
T201
T201
C251
T201
U251KIA34063A
C256
R250
T201
R262
T201
D256
T201
Q261
T201
T201
C252 C258
C257 T201
T201
VR251
T201T201
C234
T201
HOT
COLD
HOT COLD
D221
R242 C230
D233
D234
6 VDC
3.4 V
3.4 V – ON
STBY 5V
?????
6 V
Switch Collector Driver Collector
1
2
3
4
8
7
6
5
I pk SenceSwitch Emitter
Timing Capacitor
GND
VCC
Capacitor Inverting Input
SOUND
Green - StartupYellow – RunBlue – OVPRed – OCPViolet - Feedback
Feedback
33Plasma Display Panel Troubleshooting - 2007
The 60PC1D Plasma Display contains 3 Power Supply related Circuit Boards and 4 Power Supply Circuits which supply power requirements to the unit. The AC/DC Power Supply Board, the Standby Power Supply and the PFC ( Pulse Frequency Coefficient ) Supply Board and the SMPS ( Switch Mode Power Supply ).
The following circuit explanations will give the Technician a betterunderstanding of the operation and adjustment of each board and how to isolate which board may be at fault in the event of a failure should one occur.
60PC1D Power Supplies First Generation
Troubleshooting
There are 4 Adjustments available on the Switch Mode Power Supply Board and one on the PFC Supply Board.SMPS Board1) VR8401 VA Adjust used for the Vertical Grid Drive2) VR8501 VS Adjust used for the Horizontal Grid Drive3) VR8802 5VDC Adjust used for developing Drive Signals4) VR8801 3.4V Adjust used for Control Signal Development ( Factory Adjusted )PFC Board1) VR801 380V Adjust for PFC use AC Ground (use GND PIN of P803A)
34Plasma Display Panel Troubleshooting - 2007
AC INPUT
CIRCUIT
PFC Supply
SMPS
STBYB+
Source
AC
PFC SOURCE
Relays
AC
STBYSupply
160V STB
20V STB
PFC B+ 110VDC
18V Source380V
Source
380V 18V
AC
Relay Drive
5V, AC-ONTo Micro
VA Source
VS SourceLow Voltage Source19V, 12V, 6V, 3.4V
5VDC Source
VA
VS
5V
AC/DC SUPPLY
Block Diagram 60PC1D Power Supply First Generation Troubleshooting
P-CTL , VS ON And POD from
the Micro
POD, VSON,and Rush
35Plasma Display Panel Troubleshooting - 2007
AC/DC Power Supply Board AC Input
P801
P8015A P8016A
P8017A
Relay Drive 20V and 160VSupply for PFC
Supplies Approx. 20V and 160V to the Standby Power Supply and Approx. 110V to the PFC SupplyReceives 12V for Relays RL8301 and RL8302
Troubleshooting
36Plasma Display Panel Troubleshooting - 2007
StandbyPower Supply PFC Power Supply
Troubleshooting
Relay DrivePFC Supply
Input
PFC Supply OutputPower Control
P803A
P801
P8016B
P804A
P801A
P8015B
PFC Receives 110V from the AC/DC Supply and sends 380V and 18V to the
Switch Mode Power Supply. VR801 is a 380V PFC Adjust.Standby Supply receives approx 20V and 160V and
outputs 12V, AC Detect, and 5V ST.
VR801
37Plasma Display Panel Troubleshooting - 2007
Switch Mode Power Supply Board TroubleshootingVA
VR8401VS
VR8501
3.4V VR8801
5VDCVR8802
380V 18V
VA
VS
5V
P8011
P8012
P800B
P101BP803B
3.4VPin 7
38Plasma Display Panel Troubleshooting - 2007
60PC1D Power Supplies Troubleshooting
AC Power inputs to the AC/DC Supply which is responsible for supplying 160V and 20Vto the Standby Power Supply. The Standby Power Supply develops 5V ST and AC DETwhich is sent to the Main Board to control the power up and down functions. The StandbySupply also develops 12V needed to drive the Relays which switch the AC Power on and off.
Until now the set is turned off and the set is waiting for the on command from the Main Board.The Customer turns on the set and the Main Board reacts as long as the AC/DC Supply and Standby Supply are functioning normal. The next step is for the P-CTL line to go high which causes the Relays to close. The AC/DC Board will output 110VDC to the PFC Board developing the 380VDC and 18VDC lines which power up the SMPS Board and at this point the 19V ( must be measured from Audio Ground ) 12V, 6V, and 3.4V are now present.
Finally, to bring the set to full Power On we need the Main Board to output a high on the VS ON and POD Lines. VS ON is responsible for developing VS and VA voltages and POD is responsible for 5VDC.
39Plasma Display Panel Troubleshooting - 2007
This Troubleshooting Procedure relates to the Power Supply used in the 60PC1D Generation 1Plasma Display Panel. This explanation will assist the technician in confirming the normal operation of the Power Supply without the need to substitute the circuit boards. The condition of all four Supplies, the AC/DC Supply, the Standby Power Supply, the PFC ( Pulse Frequency Coefficient ) Supply and the Switch Mode Power Supply can be determined and confirmed.
60PC1D Power Supply Troubleshooting
Step 1 Remove the Power Supply boards from the unit and place in the service position, connect boards as shown on page 40. Place ( 2 ) 60 Watt light bulbs in series across Pins 1 and 6 of connector P8011 ( VS to GND ).
Step 2 Apply AC Power to connector P801. Check for the presence of 5V ST ( Pin 3 ), AC Detect ( Pin 1 ) at connector P801A, and 12V at all three pins of connector P8015A measured from Chassis GND. If the voltage is present disconnect AC Power and proceed to step three.
Step 3 Connect 100 Ohm ¼ Watt Resistor from ST 5V ( Pin3 ) to P CTL ( Pin 2 ) on connector P801A. Apply AC Powerat this time the AC Relays will close and the 380V ( PFC ) and 18 V Supplies will be present at P803A
use AC Ground for this check. Check for 19V ( Use Audio Ground ),12V, 6V, and 3.4V ( use signal Ground ) on connectors P800B and P101B. If present disconnect AC Power and proceed to step four.
Step 4 Connect 100 Ohm ¼ Watt Resistor from 5V ST ( Pin 3 ) to VS ON ( Pin 5 ) on connector P801A. The Lamps placed across P8011 should now light indicating the presence of VS voltage. VA voltage
can be measured from Pin 10 to Pin 6 of connector P8011 at this time. If present disconnect AC Power and proceed to step five.
Step 5 Connect 100 Ohm ¼ Watt Resistor from 5V ST ( Pin 3 ) to POD ( Pin 7 ) on connector P801A. At this time the5VDC Supply at connector P8012 should be present and the Power Supply fully operational.
For Failure of the below steps see page 42See Page 40 for resistor placement
40Plasma Display Panel Troubleshooting - 2007
+
Troubleshooting60PC1D Power Supply Generation 1
ACINPUT
Switch ModePower Supply
PFCPower Supply
AC/DCPower Supply
P8011
P804A
P8012
P800B
P101B
P804B
P801A
P8015B
StandbyPower Supply
AC - ON
P - CTL
ST – 5V
GND
VS-ON
5V - MT
POD
P8016B
P8016AResistors 100 Ohms ¼ Watt
P8017A
P8015A
P801
P803B
P803A
P8017B
P801A
( 2 ) 60WLight bulbs
VS
GND
41Plasma Display Panel Troubleshooting - 2007
Troubleshooting60PC1D Power Supply Generation 1
PCTL
VSON
POD
Wired for Troubleshooting as shown on Page 40 the switches were added for illustrating the power on sequence
42Plasma Display Panel Troubleshooting - 2007
60PC1D Power Supply Troubleshooting
Power On Sequence
• With AC Power applied only, the AC/DC Supply will develop 20V and 160V at P8016A to the Standby Supply.Failure to produce these voltages indicates a problem with either the AC/DC Supply Board or the AC Filter. Check the AC Input at P801.
• The Standby Power Supply outputs 12 Volts used for AC Relay operation at connector P8015B and 5 Volts Standby and AC Detect at P801A and is sent to the Micro Processor circuit for Power On and Control Functions.Failure of the 12 Volt Supply, 5 Volt Standby and AC Detect indicates a failure of the Standby Power Supply.
• The Micro Processor supplies a high to P-CTL Pin 2 of connector P801A causing the AC Relays to close on theAC/DC Board and develops 110 Volt DC at P8017A which is applied to the PFC Board turning on the 380 VoltPFC Supply and the 18 Volt Supply on the PFC Supply Board. These voltages are then used to develop the 19v, 12v,6v, and 3.3v supplies. Failure of the Relays to close could be caused by a loss of “ON” Command fromthe Micro Processor on the Main Board or a Standby circuit failure. Relay operation indicates an active processor circuit and Standby Circuit. Check for approximately 110 volts at P8017A if missing suspect the AC/DC Board ifpresent and the 380 Volt and or the 18 Volt lines are missing suspect the PFC Supply. Presence of the PFC and 18 Volt lines and no output would indicate a failure of the SMPS.
Remember to always check the resistance for possible shorts if you are missing a voltage
• The next step is to have the Micro Processor bring the unit into full power on mode, this is accomplished in 2 ways by first bringing the VS ON ( Pin 5 ) of connector P801A high in order to develop the VS ( Pin1 ) and VA ( Pin 10 ) on connector P8011, second bringing the POD ( Pin 7 ) of connector P801A high to develop the 5VDC at connectorP8012. Failure to develop VS, VA, and 5VDC, if the control lines are high, suspect the SMPS Board as the problem.Make sure you remember to check each resistance load for possible shorts if the voltage was missing!
43Plasma Display Panel Troubleshooting - 2007
60PC1D Power Supply Resistance Measurements Boards Disconnected All resistance measurements are approximations.
Troubleshooting
AC/DC Power Supply
P8016A
P801A
P8017A
P8015A
30 Meg PFC B+ (+) PFC B- (-)
480K
269 Rush ctrl (+) 12V (-)270 Power ctrl (+) 12V (-)Reversed same readings
8 Meg ST-BY B+ (+) ST-BY B- (-)Inf.∞ AC-DET (+) ST-BY B- (-)
PFC Power Supply / Standby Power Supply
P8017B 500K PFC B+ (+) PFC B- (-)
P8016B 8 Meg ST-BY B+ (+) ST-BY B- (-)148K AC - DET (+) ST-BY B- (-)
P8015B Inf. Rush ctrl (+) 12V (-)Inf. Power ctrl (+) 12V (-)3.4 Meg 12V (+) Rush ctrl (-)3.4 Meg 12V (+) Rush ctrl (-)
P803A 5 Meg PFC+ (+) GND (-)1K 18V (+) GND (-)
P804A Inf. 5V MNT (+) GND (-)Inf. POD (+) GND (-)57K Rush (+) GND (-)Inf. VSON (+) GND (-)
P801A 1K* AC ON (+) GND(-)20K P-CTL (+) GND (-)1K* ST 5V (+) GND(-)Inf. VSON (+) GND(-)Inf. 5V MNT (+) GND (-)Inf. POD (+) GND (-)
44Plasma Display Panel Troubleshooting - 2007
60PC1D Power Supply Resistance Measurements Boards Disconnected All resistance measurements are approximations.
Troubleshooting
Switch Mode Power Supply
P803B 3 MEG* PFC+ (+) GN (-)286K 18V (+) GN (-)
P804B 10K 5VMONI (+) GND (-)3 MEG* POD (+) GND (-)4.9 MEG Rush (+) GND (-)4.3 MEG VSON (+) GND (-)
P101B 12 MEG* 19V (+) GND (-)2K* 6V (+) GND (-)
24 3.4V (+) GND (-)3 MEG* 12V (+) GND (-)
P800B 24 3.4V (+) GND (-)2K* 6V (+) GND (-)3 MEG* 12V (+) GND (-)
P8012 360 5V (+) GND (-)
P80115 MEG* VS (+) GND (-)5K* VA (+) GND (-)
45Plasma Display Panel Troubleshooting - 2007
• Adjustments• DC Voltage and Waveform Checks• Resistance Measurements
Y SUS Operating Voltages
Voltages Supplied from SMPS VA VS 5VDC
Y SUS Developed VSC 115v.-VY -196v.IPM 18v.ER IPMSUS IPMRamp UPV SET DNV SET UP
Troubleshooting
This Section of the Presentation will cover troubleshooting the Y SUS Board for the 60PC1D Dual Scan Plasma Display. Upon completion of this Section the technician will have a betterunderstanding of the operation of the circuit and will be able to locate voltage andresistance test points needed for troubleshooting and alignments.
60PC1D Y SUS Board
46Plasma Display Panel Troubleshooting - 2007
60PC1D Y SUS Board Troubleshooting
V Set Down
Ramp Up
V SET UP
-VY
VSC
Scope Test Point
VSC Test Point
Floating Ground ( Used for VSC Adjust)
-VY Test PointUse Chassis Ground
V Set UP Test Points
R13718VIPM
47Plasma Display Panel Troubleshooting - 2007
60PC1D Y SUS Board Block Diagram Troubleshooting
VS
VSC -VY
V SETUP
Logic SignalsFrom Control
Board
5VDC
VA
IC7SUS IPM
Y DRIVEOUTPUTCIRCUIT
Q16
Out to theControl Board
VS
VS
5V
5V
18v IPM
18v IPM
ER_10
R137
Sus out
ER High
ER Low
ER UpER Down
Sus upSus Down
IC2ER IPM
Switching FET’s
FS2FL1
FS1
FS3
P6
P5
P1
P2
P3
P4
P7
P10
P8
Y Drive
Bottom Left X Board
Z SUS Board
Power Supply
Power SupplyY Drive
Y Drive
GND
48Plasma Display Panel Troubleshooting - 2007
B12
10v
GN
D2
0 vG
ND
35.
1 v5V
4
0N
C5
6 0v
VA
P7
119
3vV
S1
0G
ND
10
11.
5 v1
5.0v
10
GN
D1
0G
ND
219
3vV
S2
0G
ND
20
2.4
3v2
5.0v
20
GN
D2
0G
ND
319
3vV
S3
5 .2v
5 V3
03
03
03
4.8v
5V3
4 .8v
5 V4
0G
ND
45.
2v5V
40
40
40
40
NC
40
NC
50
GN
D5
5v5
05
05
59.8
vV
A5
5 9.8
vVA
60
GN
D6
5v6
06
07
60v
VA
75v
70
70
860
vV
A8
5v8
08
.2v
90
95 9
.9v
100
1059
.9v
110
111 9
3.1v
124 .
6v1 2
193 .
1v1 3
1.9 v
140
1 52.
6v
P7
P4
P5
P1
P2
P3
P6
60PC1D Y-SUSTest Point and Voltage Chart
Troubleshooting
49Plasma Display Panel Troubleshooting - 2007
Troubleshooting60PC1D Y SUS Board
P4 Logic Signals input from the Control Board
VS
VA
5VDC Output for Control BoardPins 1 thru 4
SUS IPMIC7
ER IPMIC2
P7
P10
P3
P1
P2 5VDC
P6 P5
Scope WaveformTest Point
5V and VA to Bottom Left X Board
VS, VA, and 5V to Z BoardVA, 5V Left Top X Board
Floating Ground
Floating Ground
Y Drive Output
P8
50Plasma Display Panel Troubleshooting - 2007
Important Note• The following voltages and waveforms should be adjusted in the order they are presented. • Always adjust the DC levels before the waveform adjustments to most accurately set the Plasma
Display Panel.
Troubleshooting
3 Voltmeter Adjustments to Y SUS• VSC Control VR3 110 Volts used to shape the Y Drive waveform by setting the V Scan level.
Measured at the VSC test points R60 and Floating Ground.• -VY Control VR4 - 65 Volts used to shape the Y Drive waveform by setting the negative
excursion of the Drive Signal.
Check VSC Check -VY
60PC1D Y SUS Board
Measured at (left side) of Resistor R181 to Chassis Ground.
Panel Adjustments
Meter Adjustments continued on next page
51Plasma Display Panel Troubleshooting - 2007
Troubleshooting60PC1D Y SUS Board
Check V SET UP
• V SET UP Control VR20 250VDC adjustment measured across resistors R51 and R192 which setsthe Amplitude of the top portion of the Drive Waveform.
Voltmeter Adjustments Y SUS Board ( Continued )
Panel Adjustments
52Plasma Display Panel Troubleshooting - 2007
Troubleshooting
60PC1D Y SUS Board
2 Waveform Adjustments for the Y SUS Board
Panel Adjustments
RAMP UP Control VR1
V SET DOWN Control VR2
There are two waveform adjustments that will require the use of the oscilloscope to properly adjust. VR1 RAMP UPis the first control, and VR2 V SET DOWN is the second. Scope connection will be made at B41 and Chassis Ground.
The Ramp Up Adjustment will correct the pitch of the Top Ramp. Failure to properly alignthis adjustment will result in misfiring Pixels.
The V SET DOWN Adjustment will correct the pitch of the Bottom Ramp. Failure toProperly align this adjustment will result in misfiring Pixels.
53Plasma Display Panel Troubleshooting - 2007
Y SUS
60PC1D Panel Waveform Adjustment
Z SUS
Y SUS
Y SUS
Troubleshooting
54Plasma Display Panel Troubleshooting - 2007
All of the center washes out due to decreased Vset_DN time.NOTE: this can create a no pix condition, but audio is present.
The center begins to wash out and arc due to decreased Vset_DN time.
Vset_DN too low
Vset_DN too high
60PC1D Y SUS BoardPanel Waveform Adjustment
Troubleshooting
55Plasma Display Panel Troubleshooting - 2007
The center begins to wash out and ark due to -VYrunning to long and clipping.
Colors and the image will bloom slightly and the unitwill have difficulty with clean frame changes in a quicklyaltering image.
-VY too low
-VY too high
60PC1D Y SUS BoardPanel Waveform Adjustment
Troubleshooting
56Plasma Display Panel Troubleshooting - 2007
VSC too low
VSC too high
The image will show very little change but there willBe some distortion in a quickly changing image.
The image will show very little change but there willBe some distortion in a quickly changing image.
60PC1D Y SUS BoardPanel Waveform Adjustment
Troubleshooting
57Plasma Display Panel Troubleshooting - 2007
Generates Vsc, -Vy and V Set Upfrom Vs by transformer
Control Board
Diagram of Y Sustain Board
IPM’s generate Sustain Waveform
Troubleshooting
Distributes 5v VA VS Distributes 5v
Logic signals needed to
generate drive waveform
Distributes 5v VA
Receive 5V,Va, Vsfrom SMPS
Transfer Waveformto Y Drive Board
Z SUS Board
Top and Bottom Center and Left X Boards
Display Panel
Power Supply Board - SMPS
FETs amplify Sustain Waveform
60PC1D Y SUS Board
58Plasma Display Panel Troubleshooting - 2007
IPM ( Intelligent Power Module )
There are two IPMs used in 60PC1D on the Y Sustain Board.1. SUS IPM ( IC7 )
2. ER IPM ( IC2 )
Role of IPMs on the Y SUS Board1. Generate Sustain Waveform ( square wave ) – SUS IPM.
2. Energy Recovery Function ( for saving power ) – ER IPM.
SUS_DNSUS_DN
SUS_UP
ER_UP ER_DN
Troubleshooting60PC1D Y SUS Board
59Plasma Display Panel Troubleshooting - 2007
Forward Diode Test : 1. GND (+), Sus-out ( - ) 2. Sus-out (+), Vs ( - )3. ER_ DN ( - ), GRND (+)4. GRND ( + ), ER-UP ( - )5. 18v ( - ), ER GRND ( + ) 6. 5v ( - ), ER GRND ( + )
Reverse Diode Test : 1. GND ( - ), Sus-out (+) 2. Sus-out ( - ), Vs (+)3. ER-DN (+), GRND ( - ) 0.994. GRND ( - ), ER-UP ( + ) 0.995. 18v ( + ), GRND ( - ) 1.36. 5v ( + ), GRND ( - ) 0.9
Note: ER_HIGH ER_LOW, to ER_lO OPEN in Diode Check
How to check IPM (Resistance ‘Diode Check’, board removed from set)
Troubleshooting60PC1D Y SUS Board
Test Points referenced from the silk screenfound on the bottom of the PC Board.
60Plasma Display Panel Troubleshooting - 2007
60 PC1D Y Drive Boards
Troubleshooting
This Section of the Presentation will cover troubleshooting the Y Drive Boards for the 60PC1D Dual Scan Plasma Display. Upon completion of this Section the technician will have a better understanding of the operation of the circuits and will be able to locate voltage and resistance test points needed for troubleshooting.
61Plasma Display Panel Troubleshooting - 2007
VH
GND
HVO
Y-Drive Board works as a path supplying Sustain waveform and Reset waveform which are made in Y SUSTAIN B/D and sent to the Panel through SCAN DRIVER IC’s.
The Y Drive Boards supply a waveform which selects the horizontal electrodes sequentially.
* 60PC1DR uses 12 DRIVER ICs on 2 Boards (TOP, BOTTOM: 6 each)
60PC1D Y Drive Boards
Troubleshooting
Bottom Drive Board
62Plasma Display Panel Troubleshooting - 2007
60PC1D Y Drive Boards
Troubleshooting
To remove the Ribbon cable from the connector first carefully lift the Locking Tab fromthe back and tilt it forward ( lift from the outside edge as shown in Fig 1). Gently slide the
Ribbon Cable free from the connector.
Fig 1
To reinstall the Ribbon Cable carefully slide it back into the slot see ( Fig 2 ), be sure it is seated securely and press the Locking Tab back to the locked position see ( Fig 3).
Fig 2 Fig 3
63Plasma Display Panel Troubleshooting - 2007
Troubleshooting
60PC1D Y Drive Boards
Floating GroundBottom Drive Board Y Drive Signalinput
P16 P19 P20 P21 P6 P7
P1
15 Volts at Connector P1 ( Pins 2 and 3 ) must be measured with relation to Floating Ground measuring from the wrong ground will result in an erroneous reading.
P3 Floating Ground
Q504
Q505
Q506
Q507
64Plasma Display Panel Troubleshooting - 2007
Incoming Logic Signalsand 15V Supply
Floating Ground Incoming Drive Signal
60PC1D Y drive Board Block Diagram
Bottom Y Drive Board
Troubleshooting
Q506Q507 Q505 Q504 IC2IC15
P1
P3
IC11IC14IC12IC25IC27 IC13
P16 P19 P20 P21 P6 P7
15V
65Plasma Display Panel Troubleshooting - 2007
This Section of the Presentation will cover troubleshooting the Z-SUS Board Assembly. Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and resistance test points needed for troubleshooting and alignment.
• DC Voltage and Waveform Test Points• Z BIAS Alignment• Resistance Test Points
Operating Voltages Y SUS Supplied VA 60v.VS 196v.
5v.
Developed on Z SUS Z Bias 165vSUS_IPM ER_IPMIPM 18v
Troubleshooting60PC1D Z SUS Board
66Plasma Display Panel Troubleshooting - 2007
Input Voltages from the Y SUS Board
VS VS is supplied to IC7 and the SUS_IPM through coil FL5 and to the primary winding of transformer T3 to the Z Bias Circuit. Input voltage measurement is made from connector P12 pins 11 and 12, to chassis ground.
VA VA is supplied to the ER_HIGH IPM through resistor R10 and diode D18. VA voltage is alsorouted to connectors P1 pin 5 and P9 pin 5 for the right top and bottom X driver boards.
5v 5v is used to Bias the circuits on the Z_ SUS Board. 5v also feeds connectors P1 pin 3 and P9pin 3 for the right top and bottom X boards.
Voltages Developed on the Z SUS BoardZ Bias 165v is used to Bias the output circuits driving the Sustain and Erase Pulses, removing previous images
from the PDP. Z-bias is measured from the Vzb TP on the Z SUS Board and adjusted by VR3
IPM 18v IPM 18V needed to generate the Sustain and Erase pulses in the IPMs. Measured at positive side of CapacitorC18 ( Located between the IPMs IC7 and IC3 ).
Troubleshooting60PC1D Z SUS Board
67Plasma Display Panel Troubleshooting - 2007
10
GN
D1
01
0G
ND
15.
0v2
0G
ND
2.3
v2
0G
ND
25.
0v3
5v5V
3.3
v3
5v5+
30
40
NC
4.4
8v4
0N
C4
05
59.5
vV
A5
05
60.0
vV
A5
06
06
07
07
08
3.0v
8.2
v9
09
59.9
v10
1.85
v10
59.9
v11
011
193v
120
1219
3v
P9
P1
P2
P12
10v
GN
D2
0vG
ND
35.
1v5V
4
0N
C5
60v
VA
P1
10v
GN
D2
0vG
ND
35.
1v5V
4
0N
C5
60v
VA
P9
IC7
SUS-
IPM
IC2
ER-IP
M
P9
P1P1
2
P3 P5 P6
P2Pi
n 1
= TP
134
–14
5.
Z_SU
S TP
179
TP 0
– Y
&Z S
US
in
sync
Z-BI
AS
Troubleshooting60PC1D Z SUS Board
68Plasma Display Panel Troubleshooting - 2007
60PC1D Z SUSTAIN Board
IC3 ER-IPM IC7 SUS-IPM Vzb Z BIAS TP
Z BIAS Adjust Control
SUS signal TP (B11)
Timing, Data, and control signals
Troubleshooting
P9VA5VGNDGND
VS, VA, and 5V in from the Y SUS Board
69Plasma Display Panel Troubleshooting - 2007
ZBIAS adjustment: On the Z-Sustain PCBWith the DVM connected to Vzb reference to chassis ground adjust the potentiometer till the DVMreads 93 vdc.
DVM
60PC1D Z SUSTAIN Board Troubleshooting
+
-
70Plasma Display Panel Troubleshooting - 2007
60PC1D Waveforms for Z SUSTAIN Board
Input Signals to the Z SUS Board at P2 come from the Control Board and passthrough the Top Center, and Right X Drive PWBs. Connector P2 feeds theInput Signals to IC1 and IC24 which drive the IPMs. These Signals are used to develop the Z SUS Drive Waveform to drive the PDP Display.
Troubleshooting
71Plasma Display Panel Troubleshooting - 2007
NOTE: These voltages will vary due to changes in design and variations in the PDP panel.
60PC1D Z SUS BoardWaveform inputs from the Control Board
Troubleshooting
TP144TP134
TP135
TP136
TP137
TP138
TP140
TP141
TP142
TP143
TP145
72Plasma Display Panel Troubleshooting - 2007
ER_IPM
L1
L2
L3
SUS_IPM
P2
ER_LOW
ER_IO
ER_HIGH
GndER-UPER-DN
Gnd18VDC
GndSUS_DN
SUS_UP
Gnd18VDC
Chassi GND
SUS_OUT
VS
5VDC
18V IPM
P1
P12
IC1, IC24
P9
5VDC VAVA 5VDC
R42
5VDC VA
Z Bias Circuit
Z Bias Control VR3
Q16, Q18
D9
D10
D17
P6
To PDP
Output Waveform TP
To PDP
To PDPVS
P5
P3
Logic from the Control PCB.
D8
Z95V
95V Vs
VsZ95V
95V Vs
VsZ95V
95V Vs
Vs
B11
60PC1D Z SUSBlock Diagram
+ C18
73Plasma Display Panel Troubleshooting - 2007
60PC1D Z SUSTAIN Board
Provides the SUSTAIN PULSE and ERASE PULSE for generating
SUSTAIN discharge in the panel by receiving LOGIC signals from
the CONTROL B/D.
This waveform is supplied to the panel through FPC (Flexible Printed Circuit (Z).
< Probe connect point to Oscilloscope to check Z wave form >
Troubleshooting
Z DRIVE Waveform Z
95V
95V Vs
Vs
74Plasma Display Panel Troubleshooting - 2007
60PC1D Z SUSTAIN BOARD
X Board Right Top and Bottom
Distribute 5v, VA
IPM generates erase,sustain waveforms
Generates Z Bias18v IPM Vcc
Distributes Logic Signals
Distributes 5v, VA, VS
FET Makes Drive waveform Display PanelVia FPC (flexible printed circuit )
Troubleshooting
Control Board Receive 5v, VA, VS
Y SUS Board
75Plasma Display Panel Troubleshooting - 2007
Z SUS IPM (Intelligent Power Module)
There are Two IPMs( Intelligent Power Modules) on the Z sustain board
One is SUS IPM (IC7) , another is ER IPM (IC3)
Role of the IPMs
1. Generate sustain and erase waveform ( square wave ) – SUS IPM.
2.Energy recovery function ( for saving power ) – ER IPM.
SUS_DNSUS_DN
SUS_UP
ER_UP ER_DN
Z95V
95V Vs
Vs
Troubleshooting
76Plasma Display Panel Troubleshooting - 2007
Defect display
Dark displayIPM Fail
If the cable was not connected,
There is no display
P2 Cable connection
PartDescription of defectDefect name
< Dark display >
▶ Major defect : IPM fail, cable connection.
< No display >
Troubleshooting
77Plasma Display Panel Troubleshooting - 2007
Pull out Lock as shown in circles Pull Lock apart to remove Pull FPC Connector as shown in arrow.
FPC (Flexible Printed Circuit) Removal for Z Board Replacement Troubleshooting
Resistance Measurements ( use any PCB mounting screw for Ground )
*Measurements made with the board disconnectednegative lead of the meter to ground.
• VS 6 meg• VA 5 meg• 5v 3.3 meg• B11 to Chassis Ground 5 meg• Chassis Ground to SUS_OUT 4 meg• SUS_OUT to VS 2.7 meg• ER low to ER 10 4.9 meg• ER 10 to ER High 2.7 meg• 18v to Chassis Ground 7.9K• SUS_UP to Chassis Ground 10K• SUS_DN to Chassis Ground 1.3meg• ER_UP to Chassis Ground 10K• ER_DN to Chassis Ground 10K
78Plasma Display Panel Troubleshooting - 2007
This Section of the Presentation will cover the Control Board for the 60PC1D Dual Scan Plasma Display Panel. Upon completion of this section the Technician should have a better understanding of the Circuit and be able to locate Test Points
and Voltages necessary for troubleshooting.
Troubleshooting
60PC1D Control Board
79Plasma Display Panel Troubleshooting - 2007
Pin 1 Pin 2 Pin 3IC24 5.0v 2.4v 0IC42 5.0v 1.7v 0IC44 5.0v 3.2v 0IC45 5.0v 3.2v 0IC46 5.0v 3.2v 0
P200
P300P101 P102 P103
P104 P105 P106
D30
IC45
P3
P4 P1
D33
D32
D31
TP1
TP19
D2
D1
R1Out 00 – 13TP 39 - 52
G1Out 00 – 13TP 53 - 66
B1Out 00 – 13TP 67 - 80
R2Out 00 – 13TP 81 - 94
G2Out 00 – 13TP 95 - 108
B2Out 00 – 13TP 109 - 122
Addr_STB – TP 131Mis_Flag_Out – TP 130VS-DA – TP 129Blank_DA – TP 128RAS_Data1 – TP 127RAS_Data2 – TP 126RAS_STB1 – TP 125*Solder filled TP – TP 124RAS_STB2 – TP 123
TP148- TP177
IC42
IC46
IC44 IC24
60PC1D Control BoardTest Points and Voltage Distribution
80Plasma Display Panel Troubleshooting - 2007
Temperature Sensor
Temperaturediode
◆. In charge of all signal process and creating ON/OFF order of all FET on
DRIVER B/D by receiving 8 bit R, G, B input.
◆. Power : 3.3V/5VTemperature display diode can be checked.Left picture shows 7 periodswhich means normal temperatureGreen = OFFYellow = ON
D15 - 8 Weight
D16 - 4D17 - 2D18 - 1
Voltage Regulator
MCM(MicroControlModule)
TroubleshootingCONTROL Board
TEST PatternAUTOGEN P4 Connector
LG Part Number Label
Voltage Regulator
81Plasma Display Panel Troubleshooting - 2007
LVDS Connector
Remove LVDS Cable and short pins 1 and 2 of connector P4 to display test patterns.
If patterns are not present, Control
board is defective
LVDSpoor connection
Defect display
Regular vertical linesCONTROL IC
No pictureOscilator
No display orPartly no display
Connector
PartDescription of defectDefect part
▶ Main Defect : MCM , connector, oscilator, LVDS poor connection
▶ Voltage used : 3.3V/3.3V/3.3V/2.4V/1.8V(5 separate operating voltages).
< MCM >
< Connector >
< Oscillator >
< Partly no display >
< Poor connection >
60PC1D Control Board
< Display Lines >
Replace Control Board
Reseat Control Board Connectors
Replace Control Board
ReconnectLVDS or Replace Control Board
Solution
Troubleshooting
82Plasma Display Panel Troubleshooting - 2007
LGDP 4012H IC3
MCM
TCP TCPTCP
16 line
Array
192 Lines output
Diagram of Control Board
Control Board to X Board Address Signal Flow
This will show Signal Flow Distribution to help determine the failed part depending on where the failure is on the screen.
The Control Board supplies the Video Signal to the TCP ICs. If there is a bar defect on the screen, it could be a Control Board problem.
16 line
Troubleshooting
MCM
Array
83Plasma Display Panel Troubleshooting - 2007
60PC1D X Drive Boards
Troubleshooting
This section of the Presentation will cover the X Drive Boards. Upon completion the Technician will have a better understanding of the Circuits which make up X Drive and will be able to locate all the voltage test points.
The X Drive Boards consist of 3 Top and 3 Bottom Boards which are all similar in operation, therefore the Top Center Board will be considered here.
Outputs from all the X Boards drive TCP ICs ( Tape Carrier Package ) located onthe Ribbon Cable which goes into both the top and bottom of the Display Panel.
84Plasma Display Panel Troubleshooting - 2007
Voltages Supplied to the X Boards
60PC1D X Drive Board
Troubleshooting
• VA The Z SUS Board supplies both the Right Topand Bottom X Boards.
• VA The Y SUS Board supplies both the Left Top and Bottom, and the Center Top and Bottom X Boards.
• 5v The Z SUS Board supplies the Right Top and Bottom X Boards.
• 5v The Y SUS Board supplies the Left Top and Bottom, and the Center Top and Bottom X Boards.
85Plasma Display Panel Troubleshooting - 2007
TCP (Tape Carrier Package)
TCP IC
Front side Behind side
Supplies RGB 6bit signal to the PDP by connecting the PAD Electrode of the PANEL with the X Board.
<IC Defect>
Frame X_B/D
Front panel
TCP
Rear panel
Connector
Troubleshooting
86Plasma Display Panel Troubleshooting - 2007
Top Center X Drive Board
5V,VA from Top Left X Board
60PC1D X Drive BoardsTroubleshooting
RGB Logic SignalsFor the Top Center and Right
X Boards are suppliedfrom the Control Board
Logic Signals for the Z Sus Board are also Supplied here
Out to the TCP ICs
RGB Logic SignalsFor the Right Top X Board and
Z SUS Logic Signals
87Plasma Display Panel Troubleshooting - 2007
Troubleshooting
Output to TCP IC
1 50
1
NC
VA (7,8,9) 15 Thru 24
25-28
Grnd
29 Thru 36
45,46
NC
VA (42,43,44)
37 Thru 39 Grnd
Connections on Connector P205
60PC1D Center Top X Board
RGB Logic Signals RGB Logic Signals
B203VA
GND ( 2,3,4)
5,6NC
10,11NC
12,13,14Ground
40, 41NC
47,48,49Ground
NC
88Plasma Display Panel Troubleshooting - 2007
60PC1D Center Top X BoardTroubleshooting
RGB LOGIC SIGNAL INPUTS to IC201, IC202,
and IC203 output to TCP ICs
P208 P207 P206 P205 P204 P203 P202 P201
P209 P210
P212
VA
D201D202D203D204
P211
Logic SignalsOutput to Right Top X Board
and the Z SUS Board
R254R255R256R257
R250R251R252R253
R246R247R248R249
R242R243R244R245
B204
B203 B202 B201
IC201 IC202 IC203
C209
FS201
FL2015V
OUTPUT to the TCP ICs
To P211
89Plasma Display Panel Troubleshooting - 2007
60PC1D Main BoardTroubleshooting
This Section of the Presentation will cover the Main Board. Upon completionthe Technician will have a better understanding of the Signal Sources that are Processed by this Board and the will be able to confirm its operation.
Main Board
90Plasma Display Panel Troubleshooting - 2007
Troubleshooting60PC1D Main Board
Antenna / Cable Input
HDMI Inputs RS232
LVDS Signals
S- Video
P4004 P4005 P4003
R Speaker
L Speaker
Fans
Computer InputComponent Inputs
Audio / Video Inputs
Digital Audio
Tuner
BCM3550IC 1001
91Plasma Display Panel Troubleshooting - 2007
Side AV V,LR
Rear AV V, LRRear S YC, LR
Side S YC, LRMNT_V_Out
IN1
OUT1IN4IN1
IN4
IN5
OUT3
Comp_1YCbCrComp_2YCbCr
IN3IN4
CVBS
CVBS
ATSC/NTSC Tuner
CableANT.
64-Bit I/F
BCM3560IC1001
12LVDSTransVDEC_CVBS/S_Y
VSB/QAM/NTSC/SIF
SPDIF Out
R/L Output
SPDIF_OUT
Flash Memory16MByte
HDMI/DVI
RS-232C
SDRAM256Mbit X-tal
54MHz
Reset IC
D-class AMP
Sub Micom(MTV416)
Sub Micom(MTV416)
EEPROM
HDMI & ComponentRGB-PC
Audio 부
Tuner부
Comp_1 LRComp_2 LRRGB(Phone) LR AUDIO
ADCAudio R/L I2S
I2S Audio Input
MST3361
R/G/BH/V Sync
DVI Input
Digital Output.
SDRAM256Mbit x2
DDS
Data [24] Hsync/Vsync/DE/Clk2X1
S/W
2X1S/W
HDCP
IIC
TMDS
DDS
SPDIF
Y,C
IF P/N for DTVSIF for NTSC
SIF for NTSC
USB for upgrade S/W
LRMNT_OutAUDIO DAC
IIS
Made by S.B ParkModified by S.K KimDate 2006. 2. 9
TMDS
CXA2069(AV S/W)
Block diagram for CI DTV Troubleshooting
IC6004
IC7004
92Plasma Display Panel Troubleshooting - 2007
Video signal path for Composite/S-video/IF
MNT_V_Out
SD_CVBSCXA2069
IC5003
OUT3
Side AV V,LR
Rear AV V, LR
Rear S YC, LR
Side S YC, LR
IN1
IN4
IN1
IN4
IN3
IN4
Comp_1 LR
Comp_2 LRRGB(Phone) LR
BCM3550
SD_Y
SD_C
ANT/ Cable
TV IN
CVBS from TUNER
FMS6400
Y/CVBS
C
OUT1/Y
OUT1/C
M_CVBS/Y
C
M_CVBS
C
Y
LPF for CVBS
SD_CVBS
TUNER
IF_P
IF_N
IF_P from TUNER for DTV
IF_N from TUNER for DTV
Troubleshooting
93Plasma Display Panel Troubleshooting - 2007
Video signal path for Component Inputs
Comp1_Y 8(3A)
Comp1_Pb 11(2A)
Comp1_Pr 16(1A)
Comp2_Y 9(3B)
Comp2_Pb 14(2B)
Comp2_Pr 1(1B)
2 12 7SW1 SW2 SW3
6(Out3) Comp_Y
5(Out2) Comp_Pb
3(Out1) Comp_Pr
L
H
8(3A)
11(2A)
16(1A)
RGB_G 9(3B)
RGB_B 14(2B)
RGB_R 1(1B)
2 12 7SW1 SW2 SW3
6(Out3) Y/G to LPF
5(Out2) Pb/B to LPF
3(Out1) Pr/R to LPF
L
H
IC5001
IC5002
Y/G 3(YIN)
Pb/B 5(PBIN)
Pr/R 7(PBIN)
1(EXT_SYNC)
18(SYNC_IN)
16 Comp_Y
15 Comp_Pb
14 Comp_Pr
44(GIN+)43(SOGIN)
41(BIN+)
46(RIN+)
IC704IC4009
RGB_G
H Sync7404V Sync
RGB_BRGB_R
BCM3550
GPIOGPIO for sync selection
HD-DVIData [24]
H sync/V sync/DE/Clock H,V Sync/Clock
RGB_HS
GPIO for sync selection
RGB_HS
RGB_VS
RGB_HSRGB_VS
GPIOGPIO for Component
GPIOGPIO for Component
GPIO for Component
GPIO for Component
IC1001FMS6407 MST3361
MM1731
MM1732
DATA_OUTH/V/DE/CLK
Troubleshooting
94Plasma Display Panel Troubleshooting - 2007
Video signal path for HDMI Inputs
IC704BCM3550
GPIOGPIO for Interrupt
HD-DVIData [0: 23]
H sync/V sync/DE/Clock H,V Sync/Clock
GPIOGPIO for Power detection
GPIO
GPIO for Hot plug detection
IC1001
MST3361
TMDS1 RX0+/-TMDS1 RX1+/-TMDS1 RX2+/-TMDS1 RX3+/-
DDC SDA1
DDC SCL1EEPROMFor EDID
DDC SDA1
DDC SCL1
TMDS1INPUT
DDC1INPUT
TMDS2 RX0+/-TMDS2 RX1+/-TMDS2 RX2+/-TMDS2 RX3+/-
DDC SDA2
DDC SCL2EEPROMFor EDID
DDC SDA2
DDC SCL2
TMDS2INPUT
DDC2INPUT
HDCP SDA
HDCP SCLEEPROMFor HDCP
NDA
NCL
INT
DATA_OUT
H,V Sync/DE/Clock
HDMI 1
HDMI 2
Troubleshooting
95Plasma Display Panel Troubleshooting - 2007
SIF from TUNER
CXA2069
Side AV V,LR
Rear AV V, LRRear S YC, LR
Side S YC, LR
IN1
IN4IN1
IN4
IN3
IN4Comp_1 LR
Comp_2 LRRGB(Phone) LR
OUT1/R
OUT1/L
ANT/ Cable
TUNER
AUDIO ADC(CS5331)
Audio R I2S_SCK_IN
Audio L
BCM3550
SIF
I2S_LRCH_IN
I2S_LRCK_IN
I2S_SCK_IN
I2S_LRCH_IN
I2S_LRCK_IN
SPDIF_IN_P SPDIF from MST3361
_RMNT_OutAUDIO DAC
(CS4344)
I2S_SCK_OUT
I2S_LRCH_OUT
I2S_LRCK_OUT
I2S_SCK_OUT
I2S_LRCH_OUT
I2S_LRCK_OUT
_LMNT_Out
Analog L_OUTAudioAMP
(TPA3100)
SPDIF Out SPDIF_OUT_P
AUD_LEFT_P
AUD_LEFT_N
AUD_RIGHT_N
AUD_RIGHT_P
SPK_L_P
SPK_L_N
SPK_R_N
SPK_R_PAnalog R_OUT
MC3307(OP-AMP)
Audio signal path Block Diagram
IF_P from TUNER for DTV
IF_N from TUNER for DTVIF_PIF_N
Troubleshooting
96Plasma Display Panel Troubleshooting - 2007
“No raster” in details
CASE 1. No Picture (Sound Ok)
(1) To check LED light on the CTRL B/D
(2) To Check input cable from power to signal and CTRL B/D
(3) To check connection from power to X_B/D, Y B/D, Z B/D
(4) To check connection from CTRL B/D to X B/D, Y B/D, Z B/D
(5) To check fuse on Y, Z B/D and IPM
(6) Examine Scan IC’s
97Plasma Display Panel Troubleshooting - 2007
Replace CTRLRegular vertical lines on R/G/B
Replace CTRLRegular vertical lines
Replace CTRLRegular vertical lines
Causedefects descriptionpicture
MCM defect on CTRL B/D
98Plasma Display Panel Troubleshooting - 2007
Replace CTRLColor spread on R/G/B
Replace CTRLor X Drive PCB
Vertical bar on R /G/B (Open)
Replace CTRLor X Drive PCB
Vertical bar on R/G/B (short)
Causedefects descriptionpicture
MCM defect on CTRL B/D
99Plasma Display Panel Troubleshooting - 2007
Replace CTRLVertical Lines Copied
Replace CTRLDistortion
Replace CTRLAbnormal on Top or Bottom screen (only for Dual Scan
model)
Causedefects descriptionpicture
MCM defect on CTRL B/D
100Plasma Display Panel Troubleshooting - 2007
Replace CTRLData Noise
Replace CTRLor X Drive PCBA vertical line from bottom
(4005A MCM model)
Replace CTRLor X Drive PCB
A vertical line from top(only for 4005A MCM model)
Causedefects descriptionpicture
MCM defect on CTRL B/D
101Plasma Display Panel Troubleshooting - 2007
Check power to and on the control PCB if ok replace CTRL B/D
Abnormal display
Check power to and on the control PCB if ok replace CTRL B/D
To check cable connection on the control and X PCB’s
Replace CTRL B/D
Cause
raining
Full or partly No image
picturePhenomenonFailure parts
Related CTRL B/D defects
MCM
Connector
Oscillator
Connector
No LED light
102Plasma Display Panel Troubleshooting - 2007
Y-SUS B/D & Y-DRV
To replace Y-SUS or X drive PCB
Check signal and voltage on Y-SUS and Y-DRV if ok replace Y-SUS and/or Y-DRV.*Disconnect each Y_DRV PCB one at a time and retest unit.*Check supply to X boards.
Y-SUS
To replace Y-SUS
To replace Y-SUSor Y-DRV
Cause
Y-SUS
Y-SUS(abnormal display)
Y-SUS
Check signal and voltage on Y-SUS and Y-DRV if ok replace Y-SUS and/or Y-DRV.*Disconnect each Y_DRV PCB one at a time and retest unit.
Y-SUS & Y-DRV
defects descriptionpicturefailure
103Plasma Display Panel Troubleshooting - 2007
To replace Y-DRV
Abnormal picture*Disconnect each Y-
DRV PCB one at a time and retest unit.
Y-DRV
Re seat connectors
To replace Y-DRV
Replace Y-DRV
Causedefects parts
Abnormal display(connections
between Y-DRV and Y-SUS)
connector
Abnormal picture*Disconnect each Y-
DRV PCB one at a time and retest unit.
Y-DRV
Horizontal bar*Disconnect each Y-DRV PCB one at a time and retest unit.
Y-DRV
defects descriptionpicturefailure
Y-DRV
104Plasma Display Panel Troubleshooting - 2007
Replace CTRL b/d
To replace X-B/D after checking cable and
connection
Replace Z-SUS
Cause
Many vertical lines
Partly abnormal display
Dark Picture*Check for supply
voltages and Y-SUS, Z-SUS waveforms.
CTRL
X_B/D
Z-SUS
defects descriptionpicturefailure
Z-SUS & others
105Plasma Display Panel Troubleshooting - 2007
▣ Y-DRV defects
Pic. 1.
▣ Scan IC defects
1. To fixed up (-) Probe like Pic.22. To sweep (+) Probe on the connector like Pic. 3. 3. If there are short between GND and a pin, it is failure of
the scan ic To replace Y-DRV
Pic 2. Pic. 3.
Pic. 4.
1) Diode value comes 0.4~0.6 Y-DRV OK 2) Less than 0.4, to replace Y-DRV board
Checking method of Y-DRV
Ex>50X3
<Phenomenon>
GND
106Plasma Display Panel Troubleshooting - 2007
Checking method of X_B/D
1. No display of ½ screen
1) To check power connector of the X B/D2) To check connectors between CTRL B/D and X B/D3) To replace the X B/D.4) Be sure the connection of TCP after X B/D replacing
※ relation between screen and X B/DScreen X B/Dleft ½ ↔ Right X B/D …… Pic. 1 right ½ ↔ Left X B/D …… Pic. 2
Pic. 1.
Pic. 2.
107Plasma Display Panel Troubleshooting - 2007
1. Forward: test 1. GND(+) , Sus-out(-) test 2. Sus-out(+),Vs(-)
In each test, the Diode value are over 0.4V OK※ (+) + probe, (-) - probe
2. Reverse : test 1.GND(-) , Sus-out(+) test2. Sus-out(-),Vs(+)
In each test, the diode value comes infinity(∞) OK※ (+) + probe, (-) - probe
◎ EX> 42V7 model
Checking method of IPM
Pic. 1.
Pic. 2.(+) Probe Pic. 3.(-) Probe Pic. 4. DMM mode
<Phenomenon>
108Plasma Display Panel Troubleshooting - 2007
⑭
①②
⑫
③ ④
⑤
⑥
⑦
⑪
⑧⑨ ⑩
⑬
Ex) 50X3
Connecting between Y drive top and bottom
⑦
Supply waveform on panel for operation
⑥
FET driving signal to make Z waveform
⑪
⑫⑭
5V supply⑬
To supply Va,Vs to Y and Z board
5V,15V for IC and FET driving ⑤
RGB Video signal ②③④
FET driving signal to make the Y waveform
①
Supply Va,5V to X B/D ⑧⑨⑩
RoleCable
Cables roles
109Plasma Display Panel Troubleshooting - 2007
Cable defects
The cable between Y-DRV TOP and Y-DRV Bottom.It is for a model of which Y-DRV is separated TOP
and Bottom board.
The cable between Y-SUS and Y-DRV
The cable connection Between Y-SUS,Z-SUS,CTRL B/D and X B/D
Connection defect by CablePhenomenon
110Plasma Display Panel Troubleshooting - 2007
60” X-PSU. Characteristics from EAY32961901 & EAY32961801
Input requirements Output Characteristics
111Plasma Display Panel Troubleshooting - 2007
VR951 - VS ADJ
P812
10
9
8
7 N.C.
6 GROUND
5 GROUND
4 GROUND
3 GROUND
2
1
VR901 - VA ADJ
P811
1 5V SUPPLY
2 5V SUPPLY
3 GROUND
4 GROUND
P800
13 3.3V_ON_IN
12 N.C.
11 6V
10 N.C.
9 GROUND
8 STBY5V 6 5 4 3 2 1
7 5V_ON_IN
6 5V
5 VS_ON_IN
4 GROUND
3 STBY5V
2 RL_ON
1 AC_ON
12
11
10 9 8 7 6 5 4 3 2 1 4 3 2 1 5 4 3 2 1
VA SUPPLY (60V-ADJ)
VS SUPPLY (190V-ADJ)
VS SUPPLY (190V-ADJ)
VS SUPPLY (190V-ADJ)
VA SUPPLY (60V-ADJ)
3.4
V S
UPP
LY
MU
LTI_
ON
3.4
V_O
N
RL2
RL1
AC
_D
ET
NC
GR
OU
ND
NC
GR
OU
ND
GR
OU
ND
P8
14
_2
AC
NEU
TR
AL
PFCP
81
7_
2
6V
SU
PPLY
12V
SU
PPLY
GR
OU
ND
VC
C1
AC
NEU
TR
AL
AC
LIN
E A
FTER
RL1
02
P8
15
_2
6.5
V S
UPP
LY
6.5
V S
UPP
LY
P8
16
_2
PFC
_D
ET
STB
Y5V
SU
PPLY
Sound S
UPP
LY (
19
AC
LIN
E A
FTER
RL1
02
GR
OU
ND
6.5
V S
UPP
LY
60” X-PSU. Adjustment Points and Distribution of Connectors
X-PSU Main Part (LGE No: EAY32961801)
VA & VS-ADJ have been adjusted against PDP Module Specifications during final assembly process in Plasma TVs’Factory
112Plasma Display Panel Troubleshooting - 2007
60” X-PSU. Adjustment Point and Distribution of Connectors
1 2 3 4 5 6 7 8 9 10
11
12 1 2 3 4 5 6 1 2 3 4 5
P802
12 GROUND
11 GROUND
10 12V SUPPLY
9 12V SUPPLY
8 GROUND
7 GROUND
6 6V SUPPLY 4 3 2 1
5 6V SUPPLY
4 GROUND
3 GROUND
2 3.4V SUPPLY
1 3.4V SUPPLY
P803
10 GROUND
9 12V SUPPLY
8 GROUND
7 3.4V SUPPLY
6 GROUND
5 6V SUPPLY
4 GROUND
3 GROUND VR251 - 3.4V ADJ
2 19V (SOUND SUPPLY)
1 19V (SOUND SUPPLY)
AC LINE 1
NC 2
AC NEUTRAL 3
RL1
RL2
3.4
V_O
N
MU
LTI_
ON
AC
NEU
TR
AL
NC
P8
15
_1
GR
OU
ND
12
V S
UPP
LY
6V
SU
PPLY
3.4
V S
UPP
LY
STB
Y5V
SU
PPLY
PFC
_D
ET
AC
_D
ET
AC
NEU
TR
AL
P8
16
_1
6.5
V S
UPPL
Y
6.5
V S
UPPL
Y
6.5
V S
UPPL
Y
P8
14
_1
P813
AC
LIN
E A
FTER
RL1
02
GR
OU
ND
GR
OU
ND
GR
OU
ND
SO
UN
D S
UPP
LY (
19V
)
AC
LIN
E A
FTER
RL1
02
P8
17
_1
VC
C
GR
OU
ND
NC
PFC
X-PSU Sub Part (LGE No: EAY32961901)
3.4V-ADJ has been adjusted and fixed in Power Supplies’Factory
113Plasma Display Panel Troubleshooting - 2007
X-PSU Block Diagram. Converters and Regulators
MULTI-OUTPUT
CONVERTER
PFCCONVERTER
VACONVERTER
VSCONVERTER& CURRENT
SENSE CIRCUIT
VA & VSDISCHARGER
19V DISCRETE REG
12VIC REGULATOR
ON/OFFDISCRETE
5VDISCRETE REG
5VIC REGULATOR
3.4VDC/DC
CONVDERTERRECTIFIER
BRIDGE
POWER RELAY(S)
AC INPUT
VCC1
P18V
VCC1
AC_DET
PFC_DET
19V
6.5V
6V
5V
STBY5V
3.4V
12V
VA
VS
VS_OCP
VS_DET
SOUND
12V
6V5V
MULTI_ON
M5V_ON
3.4V_ON
VS_ON
STBY_ON
DISCHARGE
VA_DET
PFC_ON
RL1
RL2
P18V
P18V
3.4V
5V_MNTR750
D125 D130
D126
D601
6.5V
6.5V only 60” X-PSU
114Plasma Display Panel Troubleshooting - 2007
AC_DET
PFC_DET
VS_OCP
VS_DET
SOUND
12V
6V
5V
MULTI_ON
M5V_ON
3.4V_ON
VS_ON
STBY_ON
DISCHARGE
VA_DET
PFC_ON
RL1
RL2
3.4V
3.3V_ON_IN
5V_ON_IN
VS_ON_IN
RL_ON
AC_ON
Input 1 12V VS_DET 28 Input
Input 2 3.4V VA_DET 27 Input
Input 3 5V SOUND 26 Input
Input 4 6V STBY_ON 25 Out
VDD 5 VDD VSS 24 GND
Input 6 VS_OCP RESET 23 Input
Out 7 DISCHARGE XOUT 22 Out
Out 8 M5V_ON XIN 21 Input
Out 9 3.4V_ON VS_ON 20 Out
Out 10 MULTI_ON PFC_ON 19 Out
Input 11 3.3V_ON_IN PFC_DET 18 Input
Input 12 5V_ON_IN AC_DET 17 Input
Input 13 VS_ON_IN RL1 16 Out
Input 14 RL_ON AC_ON 15 Out
U701 M
C80F0
308
SignalsFrom/To
Main Chassis
Signals From/ToConverters and Regulators
X-PSU Block Diagram. Micro-controller
115Plasma Display Panel Troubleshooting - 2007
60” X-PSU. Main Components by Section
KECLOW DROP OUT REGULATOR; ON/OFF; 12V 2A TO-220ISLDO REGULATORKIA278R12PIU22112V SUPPLY
ROHM5.1V 5MA DO34ZENER DIODEMTZJ5.1BZD280VDD SUPPLY
FAIRCHILDP-CHANNEL -60 V -8.6A OR -60V -17A TO-220FMOSFETFQPF27P06Q201
KECNPN 120V 100MA HFE: 350~ 700 TO92 TRANSISTORKTC3200-BLQ204
ROHM6.8V 5MA DO-34ZENER DIODEMTZJ6.8BZD201
19V SUPPLY
ST MICROELECTRONICS
N-CHANNEL 900V 5.8A TO-220FMOSFETSTP6NK90ZFPQ151
SMART ELECTRONICSINRUSH CURRENT PROTECTOR; 250V-3A00 V-TYPE; 0.16 OHM
FUSING RESISTOR
ICP250-3A00R152
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU241
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC201
ON SEMICONDUCTORCURRENT MODE CONTROLLER; FREQ: 100kHz DUTY CYCLE: 50%MAX PDIP-7
CONTROLLERNCP1217AP100GU151
MULTI-OUTPUT
CONVERTER
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC601
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC502
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU122
INFINEONN-CHANNEL 600V 20A TO-247MOSFETSD20N60Q601, Q602,Q603, Q604
ON SEMICONDUCTORPFC CONTROLLER; FIXED FREQUENCY: 67 kHz PDIP-8CONTROLLERNCP1653A U601
PFCCONVERTER
SHINDENGEN600V 25A 6SBRIDGE RECTIFIER
D25XB60D101, D102BRIDGERECTIFIER
ROHMNPN 20V 500MA HFE: 1200 ~ 2700; ROHM: SMT3 EIAJ: SC59
CHIP TRANSISTOR
2SD2114K-WQ701, Q702
DAIICHI250V 16A ; COIL: 5VRELAYDH5D1-O(M)-16ARL101, RL102POWER
RELAY
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC501
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU121
EPCOS385VRMS 14MM RADIALVARISTORB72214-S2381-K101
VA101
LITTELFUSE15A 250V 5X20MM SLOW-BLO 6.3 X 31.8MMFUSE0326015.MXPF101
AC INPUT
MANUFACTURERDESCRIPTIONCLASSGENERIC NUMBER
LOCATIONSECTION
116Plasma Display Panel Troubleshooting - 2007
60” X-PSU. Main Components by Section
ABOV SEMICONDUCTOR
GMS 800 SERIES CMOS 8-BIT; FLASH MEMORY: 8K RAM: 512BYTES I/O-PORTS: 26; 28SKDIP
MICROCONTROLLER
MC80F0308G PU701
MURATACERALOCK; FREQUENCY: 8 MHZ 5% RADIAL 3 PINSRESONATORCSTLS8M00G53-AOX701MICROCONTROLL
ER
FAIRCHILDN-CHANNEL 250V 8.8A OR 250V 15.6A TO-220FMOSFETFQPF9N25C OR FQPF16N25C
Q952
KECNPN 60V 150MA HFE: 120 ~ 240 SOT-23CHIP TRANSISTOR
KTC3875S-Y KECQ951VA & VS
DISCHARGER
KECNPN 60V 150MA HFE: 120 ~ 240 TO-92TRANSISTORKTC3198-YQ953, Q954
INFINEON ORFAIRCHILD
N-CHANNEL 600V 20A TO-247 OR 600V 20A TO-3PMOSFETSD20N60 ORFCA20N60S
Q851, Q852,Q855, Q859
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU951
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC701, PC951
ST MICROELECTRONICS
HIGH VOLTAGE RESONANT CONTROLLER; FREQ: 60kHz DIP-16
CONTROLLERL6598U851
LITTELFUSE5A 250V 5X20MM SLOW-BLOFUSE215005F851
VSCONVERTER
ST MICROELECTRONICS
N-CHANNEL 900V 5.8A TO-220FMOSFETSTP6NK90ZFPQ801
SMART ELECTRONICSINRUSH CURRENT PROTECTOR; 250V-3A00 V-TYPE; 0.16 OHM
FUSING RESISTOR
ICP250-3A00R809
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU901
NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC901
FAIRCHILDSMPS SWITCHING CONTROL; DUTY CYCLE: 70%MAX DIP-8
SMPS CONTROLLER
KA7552AU801
VA CONVERTER
APECP-CHANNEL -30V -30A TO-220MOSFETAP40P03GIQ270
KECDC/DC CONVERTER FREQ: 100kHz 8PIN DIPCONTROLLERKIA34063AU2513.4V SUPPLY
KECLOW DROP OUT REGULATOR; ON/OFF; 5V 2A TO-220ISLDO REGULATORKIA278R05PIU233STBY5V SUPPLY
FAIRCHILDN-CHANNEL 60V 31A TO-220FMOSFETFQPF50N06 Q231
KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU2315V SUPPLY
APECN-CHANNEL 30V 45A TO-252(H)CHIP MOSFETAP60T03GHQ2336V SUPPLY
SENSITRON ORVISHAY
100V 20A ITO-220ABSCHOTTKY RECTIFIER
MBRF20100CT ORVF20100SG
D233, D2346.5V SUPPLY
MANUFACTURERDESCRIPTIONCLASSGENERIC NUMBER
LOCATIONSECTION
117Plasma Display Panel Troubleshooting - 2007
60” X-PSU. AC Input and Voltage for Multi-Output Converter
D125-CATHODE
VOLTAGE FOR MULTI-OUTPUT CONVERTER
D126-ANODE
D126-ANODE
D125-CATHODE
D126-ANODE
D125-CATHODE
AC PLUG-IN TURN-ON
118Plasma Display Panel Troubleshooting - 2007
60” X-PSU. Multi-Output Converter
D156-CATHODE
Q151–DRAIN
U601-PIN 6
U601–PIN 5D156-CATHODE
Q151–DRAIN
U601-PIN 6 (GATE)
U601–PIN 5 (VDD)
D156-CATHODE
Q151–DRAIN
U601-PIN 6 (GATE)
U601–PIN 5 (VDD)
STAND-BY MODE
WORKING MODE
FROM D125-CATHODE
119Plasma Display Panel Troubleshooting - 2007
AC_DET
PFC_DET
VS_OCP
VS_DET
SOUND
12V
6V
5V
MULTI_ON
M5V_ON
3.4V_ON
VS_ON
STBY_ON
DISCHARGE
VA_DET
PFC_ON
RL1
RL2
3.4V
3.3V_ON_IN
5V_ON_IN
VS_ON_IN
RL_ON
AC_ON
Input 1 12V VS_DET 28 Input
Input 2 3.4V VA_DET 27 Input
Input 3 5V SOUND 26 Input
Input 4 6V STBY_ON 25 Out
VDD 5 VDD VSS 24 GND
Input 6 VS_OCP RESET 23 Input
Out 7 DISCHARGE XOUT 22 Out
Out 8 M5V_ON XIN 21 Input
Out 9 3.4V_ON VS_ON 20 Out
Out 10 MULTI_ON PFC_ON 19 Out
Input 11 3.3V_ON_IN PFC_DET 18 Input
Input 12 5V_ON_IN AC_DET 17 Input
Input 13 VS_ON_IN RL1 16 Out
Input 14 RL_ON AC_ON 15 Out
U701 M
C80F0
308
SignalsFrom/To
Main Chassis
Signals From/ToConverters and Regulators
X-PSU Block Diagram. Micro-controller
120Plasma Display Panel Troubleshooting - 2007
Troubleshooting
Power SupplySupplements for previous Spring 2007 Meetings
121Plasma Display Panel Troubleshooting - 2007
Troubleshooting LG Power Supplies
Troubleshooting
122Plasma Display Panel Troubleshooting - 2007
This presentation will discuss Troubleshooting Techniques employed in Flat Screen LG Plasma and LCD Display Power Supplies.
Upon Completion of this section the Technician will be able to confirm the condition of the Power Supply with great accuracy and be able to
confirm normal operation without circuit board replacement.
Troubleshooting
Power Supply
123Plasma Display Panel Troubleshooting - 2007
With the Power Supply Board removed from the unit and placed in a service position apply AC Power to connector SC101 and check for Standby 5v at connector P800 ( Pin3 )and the presence of 5v AC Detect at P800 ( Pin1 ). Remove Power.
Step 1
Step 2
If the 5v Standby and AC Detect are normal, check the resistance at the output of ConnectorsP804 ( 5VDC, between Pins1 and 5 ) and P805 ( VS, between Pins 5 and 10 ) and ( VA, between Pins 1 and 5 )to be sure there are no short circuits, the resistance should be in the Meg Ohm Range.
Step 3
Connect the resistors and Light bulbs as shown in the Diagram ( PG 6 ) and apply AC Power. The Power Supply should output all the voltages necessary to operate the unit.
Failure of normal operation at this point indicates Circuit Board Repair or Replacement.
This Troubleshooting Procedure relates to the 50PC1DR Power Supply and should be used to assist in Troubleshooting and determining whether the Power Supply is functioning properly
without circuit board substitution.
Power Supply
Troubleshooting50PC1DR Plasma Display
124Plasma Display Panel Troubleshooting - 2007
Power Supply Low Voltage Connectors
P8001) AC-D2) RL-ON3) S-5V4) GND5) VS-ON6) 5V-D7) M5V-ON8) S-5V9) GND10) NC11) 6V12) N.C13) 3.3ON
P800
PIN1
P803
PIN 1
P8031) 3.3V2) 3.3V3) GND4) GND5) 6V6) 6V7) GND8) GND9) 12V10) 12V11) GND12) GNDP802
PIN 1
P8021) 19V2) 19V3) GND4) GND5) 6V6) GND7) 3.3V8) GND9) 12V10) GND
Troubleshooting
125Plasma Display Panel Troubleshooting - 2007
Power SupplyP805
P804
VS
GRND
VA
GRND
5VDC
P8001) AC-D2) RL-ON3) S-5V4) GND5) VS-ON6) 5V-D7) M5V-ON8) S-5V9) GND10) NC11) 6V12) N.C13) 3.3ON
P800 113
12345612 11 10 9 8 713
= 100 Ohms ¼ Watt
= 1000 Ohms ¼ Watt
P800
= (2) 60 Watt Light Bulbs connected in series
Troubleshooting
Pin 5
Pin 10
50PC1DR Plasma Display
P803 P8021 11012
126Plasma Display Panel Troubleshooting - 2007
This Troubleshooting Procedure relates to the Power Supply used in the 47LB1 LCD Display Panel. This explanation will aide the Technician in confirming the normal operation of the Power Supply without
needing to substitute the board.
Power Supply
Troubleshooting47LB1
Step 1
Remove the Power Supply Board from the unit and place it in the service position
Step 2Connect AC Power to connector SC100 and confirm presence of 5v Standby ( P202 pin 3 ) and AC Detect ( P202 Pin 1 ). Remove Power, if both are present proceed to Step 3.
Step 3Place 100 Ohm ¼ watt resistor as shown in the Diagram (PG 8) between RL - ON ( Pin 3 ) and 5v Standby VCC ( Pin 15 ) on the Sub Micon Board and apply AC Power. The 6v and 12v Supplies ( see PG 9 for their locations ) should now be present. Remove Power.
Step 4Install a 1K Ohm ¼ watt resistor as shown in the Diagram (PG 9) between 5v Standby ( P202 Pin 3 ) and 3.3v ON ( P202 Pin 13 ). Apply AC Power the remaining 19v, 24v and 3.3v Supplies should all be presentSee PG 9 for their locations.
Failure at any of above steps indicates a problem with the Power Supply, the Board will need to be Replaced or Repaired
127Plasma Display Panel Troubleshooting - 2007
P202P201P200
Sub Micon Board
SC100ACINPUT
100 OHMS
Pin 3RL- ON
Pin 155v Standby
5vStandby
Pin 33.3v ONPin 13
Power Supply Board47LB1
1K OHM
Troubleshooting
T101T102
P206P203
P205P204
Resistors are ¼ watt
128Plasma Display Panel Troubleshooting - 2007
47LB1Troubleshooting
Power SupplySub Micon
1 5 9 16
(1) RLY ON
(2) ACD ON
(3) RLY ON / OFF
(4) ACD
(5) MULTI ON/ OFF
(9) 24V ON OFF
(10) 3.4V DET
(11) 19V DET
(12) 12V DET
(13) 6V DET
(14) 24V DET
(15) 5V STB VCC
(16) GND
Connect a 100 Ohm ¼ Watt Resistor from pin 3 to pin 15 as indicated
129Plasma Display Panel Troubleshooting - 2007
Troubleshooting47LB1
POWER SUPPLY
(4) GND
(1) AC DETECT
(2) POWER N/F
(3) ST5V
(5) INV CTRL
(6) ERR_OUT
(7) BRT_CTRL
(8) ST5V
(9) GND
(10) PWR_DIMM
(11) 6V
(12) GND
(13) 3.4V_ON
(1) 19V
(2) 19V
(3) GND
(4) GND
(5) 6V
(6) GND
(7) 3.4V
(8) GND(9) 12V
(10) GND
(1) 3.4V
(2) 3.4V
(3) GND
(4) GND
(5) 6V
(6) 6V
(7) GND
(8) GND
(9) 12V
(10) 12V
(11) GND
(12) GND
P200 P201 P202112 110 113 3
Connect 1K Ohm ¼ Watt Resistor from Pin 3 to Pin13 of P202
130Plasma Display Panel Troubleshooting - 2007
The End Thank You!
Troubleshooting