Plazma (PDP)
LG Electronics/DND /CS Gr.
Contents1. PDP feature2. PDP discharge & structure theory3. Module & organization4. Symptom wise trouble audit5. Image Sticking audit6. Other Module audit
LG Electronics/DND /CS Gr.
1. PDP Feature
LG Electronics/DND /CS Gr.
PDP Feature
large size/lightweight/thin size are easyPDP forms Line polarity inversion between two plate glasses and has a shape of injected Plasma gas so it
can be made thin as one tenth of CRT thickness
And when over 40 wide screen is made, comparing CRT that increases cathode ray length and LCD that must
form transistor every Cell, PDP has features that mass-production is possible if only Line polarity inversion
length is increased. In case of 40, manufacture in weight 40 below thickness 10cm below is possible so PDP
can be applied to not only wall tapestry TV but also for Presentation or for information flag wide screen Display.
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PDP merits
Thin type
1/10 of CRT1/10 of CRT
Light weight
1/6 of CRT1/6 of CRTMaking Large is easy
40 inch40 inch60 inch60 inch
80 inch80 inch
Wide viewing angle
160160oo or moreor more
Good screen Uniformity Not influenced by Earth magnetic field
NN
CRTCRTPDPPDP
SS
contrary to usual Analog TV(PRT/CRT) it has no Flicker ,so it is the Digital drive Display Device that makes no eyes fatigued though long time watching.
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2. PDP discharge & structure theory
LG Electronics/DND /CS Gr.
Plasma Display Panel structure PDP outline
discharge Cell
Panel
Module
Circuit
1 Pixel
Glass
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PDP is an abbreviation of Plasma Display Panel and means electronic display device that injects gas such as He+Ne+Xe between glasses that are made airtight by front glass, rear glass and partition between them and authorizes voltage to polarity inversion of plate and cathode then radiates neon light then uses it for display.
Barrier Rib
(Front Glass Substrate)
Sustain Electrode
Dielectric LayerProtection Layer(MgO)
Dielectric Layer
Bus Electrode
Under Layer
Phosphor(R,G,B) Address Electrode
(Back Glass Substrate)
PDP (Plasma Display Panel) ?
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PDP outline
Plasma Display Panel structure PDP outline
< Front Glass>
Protection(MgO) Dielectric
Layer
BUSPolarityinversion
ITO polarity inversion
W/B
Barrier Rib
Electrode Fluorescent
< Back Glass >
PlasmaPlasma
Visible Light
UV
Address polarity inversion Glass
partition
Bus polarity inversionITO polarity inversion
Fluorescent material(R,G,B)
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AC-PDP discharge theory PDP outline
Visible Light
PlasmaPlasma
UVVisible LightVisible Light
Back Glass Substrate
Front Glass Substrate
Fluorescent substance(R,G,B)
partition
DielectricLayer
Dielectric protection layer (MgO)
Dielectric Layer
Address polarityinversion
Sustain polarityinversion
Bus polarity inversion
Under Layer
Gas Discharge
UV Generate
Visible Luminate
Display
Pulse type voltageauthorization topolarity inversion
Scan polarity inversion
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AC-PDP discharge theory PDP outline
PDP Cell dischargethe image intensified CCD camera (ICCD)
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3. Block Diagram 3-1. Block Diagram 3-2. Block Diagram 3-3. 3D Comb Filter
LG / /Gr
Block Diagram (PAL)
ZHINE
10
24
IEP
24
ADCW/PLL
DVI RXW/HDCP
Gm1602Scaler (Malibu)
Comp/RGB_SW
Comp_480i/p
TXO/1/2/3/CDisp-EnSDATASCLK,SLE
+-
CXA2069QSWITCH
VPC3230(M)Video Decoder
VPC3230(S)Video Decoder
SDA6001Text Processor
HYV641620SRAM
AM29LV160F-ROM
HY5DU283222ASD RAM(128M)
AM29LVF-ROM(1MB)HY57V64322
SD RAM(8MB)
S2300Delnterlacar
CXA2101
M52758FSwitch
74ACT253
ST3232C
74HCT08
24LC21
24LC21
74LS123
Tuner(M)
Tuner(S)
Text Video for Text
CXA_RGB
RGB_ Data
TX Out
RS232 RX/TXRGB PC
RGB DTV
Comp DTV
SCL/SDA
RX/TX0/1/2+ RX/TXC+
SCL/SDA
RGB HV
RGB PC/DTV
RX0/1 TX0/1
TXIR
Comp RGB_SWfrom Malibu
CVBS S-VHS Side AV BOARDComp_480i/pTo Malibu
Vin5 YCin5Comp_480i
Text_V
Main_YCMain_V
TV OUTVin1(CVBS)
1H RGBVin2(CVBS)
MNT OUT
Vin3(CVBS)
TU_Main
TU_Sub
Comp_Y
Analog BOARD
Vin4
YCin4
WIREIR
RS232
RGB(PC/DTV)
DVI(PC/DTV)
Scart1
Scart2
Scart3
RF
CVBS
S-VHS
Comp1(DVD/DTV)
Main_VMain_YC
Digital BOARD
Sub_Video
Main_Video
YCbCr
8
DVI_Data
Pos-t processing Block is omitted.So called JEPICO, in this caseTMDS TX is also required.Sound Processing Block Diagram is separatedRCA type Block Diagram is also separated..
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Block Diagram (NTSC)
CXA2069QSWITCH
WIREIR
RS232
RGB(PC/DTV)
DVI(PC/DTV)
74ACT253
ST3232C
74HCT08
24LC21
24LC21CXA2101
M52758FPIC202(MUX)
VPC3230(M)Video Decoder
VPC3230(S)Video Decoder
HY57V64322SD RAM(8MB)
IEP
ZHINE
LVDS31PIN
Tuner(M)
Tuner(S)
UPD64083
gm1501H(Scaler)
AnalogRGB
DVI
VPORT(24bit)
SVPORT(16bit)
M52758FPIC200
M52758FPIC400(MUX)
M62320FP(I2C Expender)
M37136(OPT)
LA7151M
FLI2300
TMDS Transter/Thine
TOFP 128KDDR Memory
Flash ROM512K/1M
RF
M656 8bitCOMB Y OUT
COMB C OUT
Main Y OUT
ALT_Y_480i_ SUBALT_Y2_480i_ SUB
DVD SUBDVD2 SUBSUB_Y OUTSUB_C OUT
RGB_DTV
RGB_PC
TX
HV
IIS
IISRGB DTV
IIS
DAC_RGB RGB_24bit
CAB_Comb
S/DVD_Comp
ALT_Y_480i_ MAINALT_Y2_480i_ MAIN
SW CVBS/YMAIN V OUT
MAIN Y OUT
MAIN C OUTCAB_VIN
DVD MAIN
DVD2 MAIN
Comp1(DVD/DTV)
Comp2(DVD/DTV)
CVBS IN
CVBSOUT
S-VHS
Side-CVBS
SideS-VHS
VIN2
Y/C IN2
S656 8bit
Y/CIN1
MNT OUT
VIN1
DTV2_Comp DTV_Comp
Side A/V
Analog BOARD
Digital BOARD
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3D Comb Filter UPD64083GF
Block Diagram
4Mbit FrameMemory
4Mbit FrameMemory
C-Delay &C-Noise Reducer
C-Delay &C-Noise Reducer
YC SeparatorY Noise Reducer
3 Line Comb Filter
YC SeparatorY Noise Reducer
3 Line Comb Filter
Motion Detector3 Line Comb Filter3 Line Comb Filter
Motion Detector3 Line Comb Filter3 Line Comb Filter
WCV-ID Dec.
ID-1 Dec.
Y-Coring
Y-Pecking
Y-Enhancer
ID-1 Enc.
Non-Std.Detector
Sync.Separate Timing
Generator
10-bitC-ADC
10-bitY-ADC
10-bitC-ADC
10-bitY-ADC
S
E
L
S
E
L
S
E
L
S
E
L
Bias
Clamp
8 fsc PLL
10 bitFsc DAC
Fsc/227.5fHDec. Power
Down cont.
I C BusI/F
2Ext.Sync
Separate
Ext.Sync
Separate
BPFBPF
Y
4fsc
2I CBus Line
Y/CDigitalOutput
YOutput
COutput
10-bit DigitalComp. Input
CInput
Comp./YInput
20MHz
C
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3. Module & organization
3-1. MN-60PZ90V (General type)3-2. DN-50PY10 (Speaker built-in type)3-3. DN-50PZ60 (Tuner built-in type)3-4. MN-50PZ90V (General type )3-5 .DN-40PY10 (Speaker built-in type )3-6. DN-42PZ60 (Tuner built-in type) 3-7. MN-42PZ90 (General type )3-8. Module Notation Method3-9. Module wise application model
LG Electronics/DND /CS Gr.
CONTROL B/D
Y-DRIVE
BOTTOM
Y-SUS
B/D
Y-DRIVE
TOP
X-LEFT B/DX-RIGHT B/D
Z-SUS B/D
COFCOF
IPMIPM
PSU
Composition of PDP Boards 42 V6 Model
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Introduction
Vsc-VyVsetup
Voltage label (Attached on back side of module)
Part No. label (Attached on board)
COF serial No. label (attached on COF)
BOARD ASS`Y PART NO.
PCB PART NO.
BOARD NAME
BOARD SERIAL NO.
COF SERIAL NO.
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X Board
Receiving LOGIC signal from CONTROL B/D and make ADDRESS
PULSE(generates Address discharge)by ON/OFF operation, and supplies this waveform to COF(data)
X RIGHT B/D X RIGHT B/D
Power partSignal part
X LEFT B/D X LEFT B/D
Pull COF as shown in narrow.Lift up lock as
shown in narrow.
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Z sustain Board
Make SUSTAIN PULSE and ERASE PULSE that generates
SUSTAIN discharge in panel by receiving LOGIC signal from
CONTROL B/D.
this waveform is supplied to panel through FPC(Z).
*composed with IPM,FET,DIODE, electrolytic capacitor ,E/R coil.
* IPM (Intelligent Power Module)
E/R(Energy recovery)
Separate the fixed Screw of Z-Board.Pull out Lock as shown in arrow.
Pull FPC Connector as shown in arrow.
Condition in Lock part is pulled
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Y Drive Board
1) This is a path to supply SUSTAIN ,RESET waveform which made
from Y SUSTAIN B/D to panel through SCAN DRIVER IC.
2) Supply a wave form that select Horizontal electrode (Y SUSTAIN electrode)
sequentially.
- potential difference is 0V between GND and Vpp of DRIVER IC
in SUSTAIN period.
- being generated potential difference between GND and Vpp only
in SCAN period.
* In case of 42 V6 use DRIVER IC IC 8 EA (TOP, BOTTOM: each 4EA)
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Y sustain Board / Control Board
Y sustain B/D
: generates SUSTAIN,RESET waveform, Vsc(SCAN)voltage.
and supplies it Y DRIVER B/D.
* Composed with IPM,DIODE, electrolytic capacitor ,FET.
Control Board
: creates signal processing (Contour noise,reduction SM,..)
and an order of many FET on/off of each DRIVER B/D with
R,G,B each 8bit input.
* Use 3.3V/5V 2 kinds of power .
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DC/DC Converter part
DC/DC con. part
: Being impressed 5V, Va ,Vs,
DC/DC converter makes
5V,Va,Vs,Vset_up,Vsc
which is essential for each B/D.
There is no DC/DC B/D in
model 40 /42 (1 POWER B/D).* 50 60 embedded DC/DC B/D
separately because of high power
consumption.
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FPC / FFC
: supply a driving waveform to PANEL by connecting a PAD electrode of PANEL with PCB(Y and Z).
* there is two type of this for Y B/D. One is single-sided,another is double-side. These are having pattern on it
* for Z B/D, there is no pattern , single-sided, and Betatype(all of copper surface).
FPC (Flexible Printed Circuit)
FFC (Flat Flexible Cable)
: for connecting a Logic signal between B/D and B/D.*There is 0.5mm pitch,50pin type1mm pitch ,30pin type.
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COF (Chip On Film)
: supply a waveform which made from X B/D to panel and select
a output pin that is controlled by COF when be on or off.
96 output pin per IC.
the more the resolution higher, the less spare space where can set IC on it in B/D. without using IC PACKAGE,
we can use a BARE IC , so we can get IC with LOW COST
because we do not solder IC on PCB directly,a soldering defect rate decrease.
* composition
1) FPC + Heat /Sink
FPC for COF must have a Low Spec decline with getting damp 2) CHIP resistor + CHIP CAPACITOR
3) BARE IC (STV7610A/WAF) + GOLD WIRE/AL WIRE
4) EPOXY MOLDING
Bare IC
* 42 V6 COF is the same as 42V5.
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IPM ( Intelligent Power Module)
: composition
HEATSINK,CAPACITOR
DIODE
IC LINEAR
RESISTORTANSISTOR,FETS.
: description
Attached at Z B/D and Y B/D, make Sustain waveform.
Sustainer : supply a square wave to panel to make a video.
IPM
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Monitor configuration diagram MN-60PZ90V
General type
Rv401 Vs Rv401 Vs
Rv601 VaRv601 Va
X-Board (L-TOP) X-Board (R-TOP)
X-Board ( L-Bottom) X-Board ( R- Bottom)
Z-BoardY-Board
VSC Board
Controller Board
POWER Board POWER Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
PFC Board PFC Board
DC/DC Board
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DN-50PY10Monitor configuration diagram
Speaker built-in type
X-Board (L-TOP) X-Board (R-TOP)
X-Board ( L-Bottom) X-Board ( R- Bottom)
Z-Board
Y-Board
VSC Board
Controller Board
POWER Board POWER Board
X-Board (C-TOP)
X-Board ( C-Bottom)
DC/DC Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
Speaker RSpeaker L
Tuner Board
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Rv401 Vs Rv401 Vs
Rv601 VaRv601 Va
Rv401 Vs Rv401 Vs
Rv601 VaRv601 Va
X-Board (R-TOP)
X-Board ( L-Bottom) X-Board ( R- Bottom)
Z-BoardY-Board
VSC Board Down
Controller Board UP
POWER Board POWER Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom) DC/DC Board Down
X-Board (L-TOP)
DN-50PZ60,70Monitor configuration diagram
Tuner built-in type
X-Board (C-TOP)
X-Board ( L-Bottom)
A/V Box-Board
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MN-50PZ90VMonitor configuration diagram
General type
Rv401 Vs Rv401 Vs
Rv601 VaRv601 Va
Rv401 Vs Rv401 Vs
Rv601 VaRv601 Va
X-Board (R-TOP)
X-Board ( L-Bottom) X-Board ( R- Bottom)
Z-BoardY-Board
VSC Board Down
Controller Board UP
POWER Board POWER Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
DC/DC Board
X-Board (L-TOP)
X-Board (C-TOP)
X-Board ( C-Bottom)
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DN-42PY10Monitor configuration diagram
Speaker built-in type
X-Board L X-Board R
Z-Board
Y-Board
VSC Board
Controller Board
POWER Board POWER Board
X-Board C
DC/DC Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
Speaker RSpeaker L
Tuner Board
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DN-42PZ60,70Monitor configuration diagram
Tuner built-in type
X-Board (L-TOP) X-Board (R-TOP)
X-Board ( L-Bottom) X-Board ( R- Bottom)
Z-BoardY-Board
VSC Board UP
Controller Board Down
POWER Board POWER Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
A/V Board
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MN-42PZ90Monitor configuration diagram
General type
X-Board R
Z-BoardY-Board
VSC Board
POWER Board POWER Board
Y-Driver Board (Bottom)
Y-Driver Board (Bottom)
A/V BoardControl Board + X-Board L
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PDP Module Notation Method
P D P 5 0 X 2 0 3 0 1size ( INCH )
X : XGAV : VGA
VERSION
POWER = PSU (existence)Tool kind ( 1, 0 )
42 : 5 ~ 6 60 : 5
general : 0,3 high : 1, 4 PANEL
OLD.NEW notation outmoded : 0 CONTROL B/D new model : 3
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PDP Module wise Application Model
1. General type40NVDN4 6348Q - A032D MN-40PA10, MN-40PA10A 42SD2 6348Q E031D MN-42PZ10 42SD3 6348Q - E032D MN-42PZ10, MN-42PZ12 50WXDP1 6348Q C030C MN-50PZ40S, MN-50PZ41 60HD3 6348Q B031D MN-60PZ10, MN-60PZ11K 60HD4 6348Q B034C MN-60PZ12, MN-60PZ15K
2. Low voltage 42SD4 6348Q E034A MN-42PZ40S
3. KK ModulePDP42V50330 6348Q E037T MN-42PZ90, MN-42PZ44S,
MN-42PZ95PDP42X10030 6348Q E041M DN-42PZ60,70, MN-42PZ65,75 PDP50X20330 6348Q C032A MN-50PZ90V, MN-50PZ44VS, DN-50PZ60,70
6348Q C032P MN-50PZ95V, DN-50PZ65, DN-50PZ75 6348Q C033S MN-50PZ95V, DN-50PZ65, DN-50PZ75
PDP50X50331 6348Q C035D DN-50PY10 PDP60X50330 6348Q B036A MN-60PZ90V, MN-60PZ95V
6348Q B037F MN-60PZ90V, MN-60PZ95V
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4. Symptom wise Trouble Audit
4-1. The directions of remote control4-2. Audit by POWER LED4-3. Indication of LED state 4-4. C O F principles4-5. X-Board Audit4-6. Module Trouble Audit4-7. VSC Board Trouble Types4-8. Wrong discharge SVC Guide4-9. Module Control Inspection Method
4-10. Troubles Types when Version mixed4-11. Y,Y- Driver Symptom wise Troubles Types4-12. Z-Board Operation principles
LG Electronics/DND /CS Gr.
The instructions of remote control
1. Method of Module used time confirmation and Reset 1-1. With pressing Menu Key of Set, press the
IN-Start Key of remote control (for about 5 seconds )
1-2. In the case of 42 KK Module, OSD that is read Option, in the case of 50 KK Module,ODS that is read Temperature indicated.
1-3. When pressing In-Stop button of remote control, initialization is finished 1-4. In the case of 60 KK Module, press the Vol + Key of Set then press the
Menu Key ( for about 5 seconds ) 1-5. OSD that is read Temperature is indicated 1-6. When pressing In-Stop button of remote control, initialization is finished
2 . Method of White Balance adjustment and confirmation 2-1. In the case of KK Model initiated MN- ,when pressing ADJ Key of
remote control, the confirmation is possible 2-2. In the case of KK Model initiated DN- ,when pressing ADJ Key of
remote control ,the following OSD are showed 0). E z Adjust 1). AD 9883A SET 2). VPX 3226 3). White Balance color adjustment 4). DVCO SET 5). White _ Pattern R,G,B, color confirmation6). Module Control 7). Temperature Threshold
NEW OLD
3. In the case of existed Model when pressing ADJ-Key, Power ON-Key, and IN Start-Key ,the confirmation of White-Balance and White-Patternis possible
3-1. For change and adjustment , use the CH+,CH- and VOL+, VOL- buttons
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When POWER LED doesnt work
Is the power LED workedred when Standing-By ?
NO
YES
AC input terminalinspection
I s it changed to greenLED and worked when Powered ON?
NO
YES
When returning to red LED
Is each terminal B+ power (High power) supplied?
VS voltage inspection(180V LINE)
VA voltage inspec-tion (75V LINE)
V-Setup voltageinspection(240V LINE)
VSC voltage insp-ection (120V LINE)
Audio VCC power(30V LINE)
Does LED and oscillation of VSC Board worknormally?
NO
NO VCC power inspect-ion( 5V,12V LINE)
YES
Does LED and oscillationof Control Board worknormally?
NO Signal Cableinspection
YES VSC Board inspe-ction
YES
Is the set-up of Y-SUS ,down waveform genera-ted normally?
NOY-Board inspection
YES
Is VCC and signal ofZ-SUS connected?
NOZ-Board inspection
YES
Does Module make a noise?Is Back Light turned on?
YESModule inspection
NO Module ControlBoard inspection
DC/FAN inspection( 12V,5V inspection )
Power Boardinspection
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LED state indication
off
red
scarlet on-off
green
Power on sign LED
The state MAIN power is off
Power stand-by state ( STAND BY )
The state preparing for working in Powerstand-by state
The state of working
When LED is returning to red with Power onWhen LED is returning to red with Power on
Y-SUS, Z-SUS inspection( DC/DC Board inspection )
X-Board inspection
Y-SUS, ( DC/DC Board)
180V is Downed (VS)
75V is Downed (VA)
120V Downed (VSC)240V Downed (V-Setup) Y-SUS, ( DC/DC Board)30V Down ed (Audio Line) VSC-Board, Audio Board
When FAN doesnt work DC / FAN, link connector, 12V,5V VCC confirmation
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ONE POINT CHECK METHOD 42 KK
Regulation method VR Position such as VS voltage, VA voltage and voltage.
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Power Supply (Sony Board)
P801P802P803P804P805P806P807
PODGNDGNDGND
Vs5V5V
5V-MNTGND12VGNDVs
GND5V
VS-ON12VGND5VVsVa5V
GND12V3.4V5VNC
GND5V
ST-BY 5VGNDGND
GNDGNDGND
RL-ONGND6V
GNDNC
GND
A-ON6V
GND
GNDVs
GND
6VGND
GNDVs
GND
GND25V
Va
GND25V
Va
3.4V 3.4V
Pin No 1 2 3 4 5 6 7 8 9 10 11 12
T103
T702
T101
T502P806
P807
P804
P805
Va ADJ
Vs ADJ
P801 P802 P803
VR601
VR401
ACINPUT
Vs Trans
Va Trans
ST-By Trans
Low VoltageTrans
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Power Supply (Sanken Board)
T201
T271
T221P806
P807
P804
P805
Va ADJ
P801 P802 P803
VR501
VR401
ACINPUT
T121
Vs ADJ
Vs Trans
Va Trans
ST-By Trans
Low Voltage Trans
P801P802P803P804P805P806P807
PODGNDGNDGND
Vs5V5V
5V-MNTGND12VGNDVs
GND5V
VS-ON12VGND5VVsVa5V
GND12V3.4V5VNC
GND5V
ST-BY 5VGNDGND
GNDGNDGND
RL-ONGND6V
GNDNC
GND
A-ON6V
GND
GNDVs
GND
6VGND
GNDVs
GND
GND19V
Va
GND19V
Va
3.4V 3.4V
Pin No 1 2 3 4 5 6 7 8 9 10 11 12
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No Power
X CANVAS
No Power ( It isnt lighted even in ST-BY)
Confirm if power is supplied and main power s/w is turned
ON confirm the EMI Board Fuse(confirm if it is rated capacity)
Be sure to use the fuse of rated capacity
Fuse 15 A
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No Raster
X CAVBAS CANVASX
Normal screen stateIts turned off automatically after 2~3 seconds when power is on.(LED changes from green to red)
Model name : All models Main Check : confirm the B+ voltage supplied to each end (such as VS, VA, VSC, V-SETUP) Content of badness : It is turned off automatically after 2~3 seconds when power is on.
(LED changes from green to red) measures : change of Y-Board through VS voltage short
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DC/DC Board Voltage Regulation Method
1. NC2. V setup3. V setup ( 15V )4. V setup ( GND )5. NC6. NC7. V sc 8. V sc ( 15V )9. V sc ( GND )
1. V y2. V y ( 15V )3. GND4. GND5. NC6. NC7. V e 8. GND
P23
1. V setup voltage regulation Vary the separate GND (2,4)VR2
2. V sc voltage regulation Vary the separate GND (7,9)VR1
3. -V y voltage regulation Vary the general GND VR4
4. -V e voltage regulation Vary the general GND VR3
VSC V setup- V y
- V e
P22
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C O F principles
COF : CHIP ON FILM
Data COF IC inspection method3 8 4
COF IC COF IC COF IC COF IC
9 6
R,G,B, R,GBeach 16 X 6
resistance
R,G,B,R,G,Geach 16 X 6
GND
R,G,B each 32 items X 3 . 42 CTRL = 7 X 12.50 CTRL = 11 X 12 X 2.60 CTRL = 11 X 12 X 2
Regarding pattern( GND ) as ANODE, pattern ( resistance soldering part ) as CATHOD,Practice the diode inspection forward and backward.
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X-Board audit point
screen screenscreen
screenscreen
screen
As the above, the space charging screen display is allocated for each X Board ( XL_TOP, XL_CNT, XL_BOT, XR_TOP, XR_CNT, XR_BOT ).
Thus, if the occurring screen problems are limited only to the space X B/D, For example, regular vertical line or abnormal screen in Data COF IC unit, Data COF unit can be the problems of X B/D.The inspection method will be explained in next chapter how to inspect when screen display doesnt work at all about each X B/D, giving examples of XL_Top B/D.
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Module Trouble Audit Point
. When one or many Vertical lines are generated irregularly on screen. 1. When one or many lines generate irregularly, it is not the problem of Controller B/D X B/D. 2. In this case , it may be OPEN(or SHORT) generating due to the following.
- Trouble of panel itself
- The trouble of DATA COF itself attached to panel
- OPEN or SHORT of DATA COF FPC attached to panel
In the case of ADD-BAR
One BAR appears. It has colors.(magenta,cyan,yellow)In the case of RGBconversion ,specific coloris displayed normally.
Black BAR of 2`3cmthickness appears.Resistance (10) isbroken in front terminalof relevant COF IC
In the case ofADD-BAR
The symptom occurs in KK Module Relevant COFresistance is raised About 10 thicknessof bar appears
In the case ofADD-BAR
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Module Trouble Audit Point
In the case ofADD-BAR
One BAR appears and ithas a color.(magenta,cyan,yellow)In the case of RGBconversion , specificcolor is displayed normally.
In the case ofADD-BAR
Module exchange
Many BARS appear andthey have colors.(magenta,cyan,yellow)In the case of RGBconversion , specificcolor is displayed normally
1. X Board inspection
2. Link connector inspection
3. Control Board inspection
4. Module inspection
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ONE POINT SVC Guide Module
When specific color and ADD BAR appear When specific color and ADD BAR appear
Model name : All models main Check : confirm if it appears in a line and has specific color when changing to R.G.BContents of badness : When ADD BAR appears in a line (specific color, magenta, yellow) measures : change the module
Great Company Great People QAS 365QAS 365- 49 -
ONE POINT SVC Guide Module
Great Company Great People QAS 365QAS 365
Model name : All models main Check : check the 10 registance at the front end of COF ICContent of badness : When ADD BAR appears at intervals of 2~3cmmeasure : change the module
When ADD BAR appears in black at intervals of 2~3cm
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When ADD BAR appears in black at intervals of 2~3cm
Module ONE POINT SVC Guide
When many ADD BAR appear When many ADD BAR appear
Model name : All models main Check : check the film connection at the front end of COF ICContent of badness : When many ADD BAR appearmeasure : change the module
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ONE POINT SVC Guide Module
When specific color and ADD BAR appear Check the film connector linking X-Board and Control Board
Model name : All models main Check : Check the film connector linking X-Board and Control BoardContent of badness : When 5~6cm ADD BAR appears ( specific color,magenta, cyan, yellow )measure : change the film connector
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ONE POINT SVC Guide Module
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When black ADD BAR appears Check the film connector linking X-Board and Control Board
Bad work film is torn.
Model name : ever model main Check : Check the film linking X-Board and moduleContent of badness : When black ADD BAR appearsmeasure : change the module
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VSC Board Trouble Types
In the case ofVSC Board
trouble
NO POWER( KEY doesnt work )
1. It operates in green LES, NO RASTER2. When CONTROL KEY doesnt work3. OSD isnt displayed
In the case of VSC Board
trouble Specific color isnt displayed
In the case ofVSC Board
trouble
Screen is distorted likeMosaic At this time, OSDworks normally
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VSC Board ONE POINT SVC Guide
Red picture appears VSC Board DATA is different
Model name : MN-42PZ90 main Check : confirm the DATA value in a white balance control mode Content of badness : Red picture appears.(specific color is bad)measures : Modify the DATA value
Great Company Great People QAS 365QAS 365- 55 -
VSC Board ONE POINT SVC Guide
Specific color doesnt appearSpecific color doesnt appear
Model name : All Model main Check : check the VSC Board and connection cable for settop box Content of badness : specific color doesnt appearmeasures : change the VSC Board
Great Company Great People QAS 365QAS 365- 56 -
VSC Board ONE POINT SVC Guide
Picture distortion phenomenonPicture distortion phenomenon
Model name : All Model main Check : confirm the VSC Board oscillation of VSC BoardContent of badness : OSD is normal and picture is distortedmeasures : VSC Board change
Great Company Great People QAS 365QAS 365- 57 -
VSC Board ONE POINT SVC Guide
Picture is distorted through mosaic phenomenon Picture is distorted through mosaic phenomenon
Model name : All Model main Check : Confirm the VSC Board oscillationContent of badness : Picture is distorted through mosaic phenomenonmeasures : change the VSC Board
Great Company Great People QAS 365QAS 365- 58 -
VSC Board ONE POINT SVC Guide
Picture is distorted Picture shadow appears(smear)
Model name : All Models main Check : Confirm the VSC Board oscillationContent of badness : Picture is distorted through mosaic phenomenonmeasures : change the VSC Board
Great Company Great People QAS 365QAS 365- 59 -
VSC Board ONE POINT SVC Guide
NO RASTER Confirm the SVC S/W position
Model name : All Models main Check : Confirm the VSC Board SVC S/W positionContent of badness : NO RASTERmeasures : modify the s/w position (upgrade s/w)
Great Company Great People QAS 365QAS 365- 60 -
Wrong Discharge SVC Guide General type
In the case of wrong discharge trouble
After image appears like Shadow It occurs in oldModule It can be solvedwith VS voltage wrong regulation( about +,- 3~5V)
VR8501 VS
VR8401 VA
In the case of wrongdischarge trouble
When it isnt solved with VS
voltage,change the Y-SUS
Board.
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42 KK ONE POINT SVC Guide
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VSC Board Flicker is bad
Model name : All Models main Check : check the VSC BoardContent of badness : When wrong discharge appears in specific colormeasures : change the VSC Board
Wrong Discharge SVC Guide
(1) ROM Data change -- addition of Safe wave form Version : 50KK_DN05G Checksum : 4A05( file name : 50KK_DN05G_Checksum_4A05_1,2,3,4,5_new_safe.hex)
(2) Vsetup voltage regulation present 240V change 260 ~ 265V
3. Reliance inspection of second item SVC countermeasure contents
measure condition : normal temperature / Full White / Vsetup=265V / improvement ROM
a standard of judgment : regarding normal temperature(25) as standard, below 69
50KK
1. phenomenon : spot wrong discharge of low Gray pattern (animation dark screen wrong discharge) when pattern (Channel) changing, hit spot wrong discharge
2. Trouble improvement SVC plan
sDCDC Board Y SUS Board
T2 PC2 IC HS3 FET IC 6 HS5 FET
63 60 67 48 58 assurance test of high temperature reliance
(market returned products n=2unit)condition result
No problems in spot progress and reliance
55, 24hr
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Wrong Discharge SVC Guide
1. The causes of wrong discharge
230VVsetup
Set up
Set down230s
25s175V
Vs
Y output voltage wave form
-The above wave form shows Set Up / Down generating wall charge in Panel.
-The wall charge generated through Set Up / Down wave plays important role in address discharge.
-If Vs voltage is lower than specified value in label of Panel,
- Roll-off of Set Down wave form becomes slack the amount of wall charge decreases the screen gets dark and SET OFF after all.
-If Vs voltage is higher than specified value in label of Panel,
Roll-off of Set Down wave form is situated behind the amount of wall charge increases screen gets bright due to failing to express dark graduation
accordingly, wrong discharge phenomenon occurs
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Wrong Discharge SVC Guide General type
2. countermeasure
- Regulate the Va, Vs, -Vy, Vset-up voltage exactly with multi-meter referring to the voltage notation attached on right above of the Panel.
-VyVset-up
Va
Vs
Vs adj
-Vy adjVset-up adj
Va adj
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Module Control Inspection Method General type
display type of screen
Vertical lines occurs at regular intervals on whole screen
The color of vertical line
RED
GREEN
BLUE
IC202, 205
IC201, 204
IC200, 203
The relation between color of vertical lineoccurring on screen and SGRAM (IC200-IC205)
. Regular vertical lines occurs at regular intervals on whole screen. (Generally, regular flickering phenomenon occurs in specific color)
1) Occurring regular vertical lines at regular intervals is the problem related to DA of Controller B/D.
2) Because DA is related to IC202, 205(Red), IC201,204(Green), IC200,203(Blue), confirm if these parts are soldered smoothly.
Confirm the parts related to the color of vertical lines occurring on the screen mainly and see the below as to related parts.3) Confirm if the connection between above parts are Shorted with 3.3v or Ground.
4) Confirm if the adjacent two pins are shorted each other in connection with above parts.
5) Confirm if specific pin is not soldered in connection with above parts.
6) Confirm if the pin connected IC200-IC205 of DA is generated well and soldered smoothly.
7) Check the PCB pattern .
8) Change the Controller B/D.
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Module Control Board
50/60KK CTRL Block chart
Differntial input
TMDS 4Pair
LVDS 10Pair42 5Pair
TMDSLVDS
SPTC4021
Frame Memory(1 Dealy)
3EA(arranged deletion)
3Bit(Serial communication)
Flash Mem
16
100MHz(OSC) SSC
DA/MEM4011
DA/MEM4011
16*3(12*3)
16*3(12*3)
A
A
A
B
SF Mem(3)
SF Mem(3)
X, Y, Z Contro 8*3SF Mem(3)
SF Mem(3)8*3
8*3
8*3
4EA
4EA
Flash DownloadB
Temp Sense Micom
4
19
A74AC74
Demultiply dircuit
A
A
74LVTH541
Delay
74LVTH541
Delay
X Data((6*2)*11=132bit
X Data((6*2)*11=132bit
X clock Delay
X clock Delay
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Trouble Types When Version Mixed 50 General type
MN-50PZ40SMN-50PZ41
Phenomenon ofversion mix
When Module version and Control
Board Version are mixed, only half
of the screen is displayed
New model Module Control PCBPAT : 6871QCH019B
Old model Module Control PCBPAT : 6871QCH019A
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ONE POINT SVC Guide Module Control Board
Great Company Great People QAS 365QAS 365
Module Control Board Flicker is bad
Model name : MN-42PZ90 main Check : Confirm the control board and Mi com versionContent of badness : Flicker is badmeasures : change the control board
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ONE POINT SVC Guide Module Control Board
BARS appears at regular intervals Module Control Board
Model name : All Models main Check : Confirm the control board and Mi com versionContent of badness : BARS appear at regular intervals or OSD works normallymeasures : change the Module control board
Great Company Great People QAS 365QAS 365- 70 -
ONE POINT SVC Guide Module Control Board
Module Control Board BARS appears at regular intervals
Model name : All Models main Check : control board and VSC connect cable checkContent of badness : BARS appears at regular intervals and mosaic phenomenon appearsmeasures : change the Module control board
Great Company Great People QAS 365QAS 365- 71 -
Y,Y- Driver B/D Symptom-wise Trouble Audit
LG Electronics/DND /CS Gr.
Y-Sustain Board
Vs
Vsetup
Vsc
-Ve
+
+
+
-Vy
+
Er_up
Er_dn
Sus_up
Sus_dn
Pass_top
Pass_btm
Ramp_up
Ramp_dn SW
SE
SE
SCAN
NSCAN
FGND
FGND2
+15V(F2) 15V(F2)
15V(F5)
15V(F)
FGND5
SUS_UP15V(F)
15V(F)
FGND3
15V(F3)
FGND4
15V(F4)15V(F)
voltage LEVEL : Vs, Vsc, Vsetup, -Vy, Ve, +5V, +5V(F),15V, GNDFGND, +15V(F), FGND2, +15V(F2), FGND3, +15V(F3)FGND4, +15V(F4), FGND5, +15V(F5), VPP
I P MI P M SCAN DRIVER IC
(SN755864APZP)
YSUS_DN
Schematic Diagram of Y Board
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Y-Sustain Board
Role of Y Board
Y0V
Set-up Scan Sustain
Set-upSet-up It is the process of charge form in internal wall and initial reset.It affects greatly wall charge form part.It is also called address section , confirms if there is X part data.(It is the section that determines existence of operation in sustainsection due to the first discharge.
ScanScan
It is for PDP Module brightness and graduation form. (ex. If it has more Sustain , it gets brighter and it indicates graduation and luminance.)
SustainSustain
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Y-Sustain Board
the state sagging the voltage gradually and decreasing the formed wall charge in uniform cost without discharge
the stage preparing for Scan ,having uniform cost of wall charge in discharge space
< Scan stage >
the stage other line Scanned Nothing happens
< Scan stage >
the stage present line is scanned
External operation discharge occurs by the voltage authorized to polarity inversion and wall charge of Y polarity inversion part
< Sustain stage >
surface charge occurs between Y polarity inversion and Z polarity inversion by the voltage authorized to Y polarity inversion and wall charge of Y polarity inversion part
< Sustain stage >
surface charge occurs between Y polarity inversion and Z polarity inversion by the voltage authorized to Z polarity inversion and wall charge of Z polarity inversion part
< Erase stage >
the stage swelling the voltage gradually and dissipating all the wall charge
< Set up state >
the stage swelling the voltage gradually and increasing the amount of wall charge
Scan polarity inversion(Y)
A2 wave form
Common sustain polarity inversion (Z)
Data polarity inversion (Y)
180 V
180 V
280 V
70 V
70 V
180 V
180 V
Setup Scan ( Address ) Sustain Erase
Set downSet up
X
Y Z460 V 180 V
X
Y Z180 V 180 V
0 VX
Y Z0 V 180 V
0 VX
Y Z70 V 180 V
70 VX
Y Z0 V 180 V
70 VX
Y Z180 V 0 V
0 VX
Y Z0 V 180 V
0 VX
Y Z0 V 0 V
0 V
(1) (4) (5)(3) (7) (8) (9)
(9)(8)(7)(5)(4)(3)(2)(1)
(2)
the stage wall charge has
increased by scan stage
X
Y Z180 V 0 V
0 V
(6)
(6)
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Y-Sustain Board
PDP vs. CRT
PDP
CRT
..... .....
brightnessbrightness
time
time
1/60 seconds
1/60 seconds
Mechanism of brightness(graduation) expressionDisplay Device
In the case of PDP, luminance control by current is difficult because of ultraviolet rays saturation by current and visible rays saturation to the ultraviolet lays . Discharge occurs all over the screen period and discharge frequency indicates luminous intensity.(luminance discharge frequency)
CRT indicates luminous intensity by electron beam intensity and one pixel brightens only once on one screen.
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ONE POINT Check Method 42 KK
4. The control method of VR position such as Y-Board V-Setup voltage, VSC voltage, -Vy voltage and voltage
V-SET UP voltage
R89 both end CHECK
VY,VE voltageR8,R9 both end CHECK
VSC voltageR60 both end CHECK
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The directions of Y-SUS and Driver Board 50 new,old model
Y-Board directions( new model, outmoded)
General type ModuleMN-50PZ40SMN-50PZ41
When Y-SUS is exchanged , Y-Driver Board can be changed and used at the same time
outmoded Y-SUS + Y-Driver PCB new model Y-SUS + Y-Driver PCB
6871QVH020A (Y-SUS)6871QDH030A (TOP)6871QDH031A (BOM)
6871QVH020B (Y-SUS)6871QDH030B (TOP)6871QDH031B (BOM)
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Y Board ONE POINT SVC Guide
Flicker is bad Flicker is bad
Model name : All Models main Check : VS, V-SETUP,confirmation of voltageContent of badness : when there is wrong discharge effect and picture doesnt appearmeasures : change the Y-Board
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Y Board ONE POINT SVC Guide
Flicker is badFlicker is bad
Model name : All Models main Check : VS, V-SETUP,confirmation of voltageContent of badness : when there is wrong discharge effect and picture doesnt appearmeasures : change the Y-Board
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Y Board ONE POINT SVC Guide
Flicker is bad Confirm the voltage
Model name : MN-42PZ90main Check : confirm if 15V line supplied to module control board sags ( about 8~9V)Content of badness : when there is wrong discharge effect and picture doesnt appearmeasures : change the Y-Board and Z-Board at the same time
Great Company Great People QAS 365QAS 365- 81 -
ONE POINT Check Method 42 KK
1. The contents to check surely before Z-Board check when screen darkness generates
1) Check the signal Line generated at Module Control Board
2) Check the Cable connected from Module Control Board to X-Board
3) Check the X-Board
4) Check the Cable connected from X-Board to Z-Board
2. The contents to check when voltage of Module Control Board 15V Line is sagged
1) Check the Module Control Board 15V Line Short
2) Check the Y-Driver Board Short
3) Change the Y-Board and Z-Board at the same time when 15V Line voltage is sagged about 8~9V. If only Y-Board is changed, badness can generates again.
3. Module changing, if UP Greade S/W is pressed at VSC Board, LED lamp isnt turned on and flickered gradually inside VSC Board
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Y-Driver Board Inspection Point
. The screen isnt displayed at all Scan FPC wise.
1) If the screen isnt displayed Scan FPC wise, it may be the problems between relevant Scan FPC and Y DRV B/D
2) Check if the connector of Scan FPC corresponding to the part that isnt displayed is connected well with Y DRV B/D
3) Check if the Clock, Data signal of relevant Scan FPC input signal of Y DRV B/D is shorted with +5V or Ground.
4) Check if the output buffer of Y B/D related to relevant Scan Drive IC works normally.
5) Check if the signals are authorized well to relevant Scan Drive IC.
6) Check if the relevant Scan Drive IC Failed.
7) Check the PCB pattern.
examples of display type of screen
Normal part
The part that isnt displayed at all
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CURTAIN BAR Trouble Types
In the case of Curtain Bar
When setting up to Y-Driver Board, DiodeCheck the Down terminal,it has a Short-circuit
In the case of wrong discharge
When setting up to Y-DriverBoard, Diode Check the Down terminal, it has aShort-circuit
Both end Diode Check (when Short-circuiting,it has a problem)
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ONE POINT SVC Guide Y-Driver
Great Company Great People QAS 365QAS 365
Picture when signal is inputPicture when theres no signal
Model name : All modelsmain Check : Diode check the SUS-UP terminal and both ends of SUS-Down to Y-DriverContent of badness : when theres no sign,the position of curtain bar moves
according to OCD positionmeasures : Change to Y-Driver board shortContent of cause : Y-Driver SCAN Driver IC is bad, broken or short
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ONE POINT SVC Guide Y-Driver
Great Company Great People QAS 365QAS 365
Picture when signal is input Horizontal bar
Model name : All modelsmain Check : check the Y-Driver board connection state of module or an alien substanceContent of badness : horizontal BARmeasures : Remove the alien substance of Y-Driver board and module connection film
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ONE POINT SVC Guide Y-Driver
Specific part is black and has no picture Specific part is black and has no picture
Model name : All modelsmain Check : check the SCAN Driver IC of Y-Driver board and portContent of badness : horizontal BARmeasures : change the Y-Driver board
Great Company Great People QAS 365QAS 365- 87 -
Z-Board Operation Principles
. The structure and operation of Z B/D circuitZ BOARD receives switch open and shut order signal from CONTROL BOARD and makes single SUS_OUT output wave form of high voltage.
The switches used for forming wave form are 6 kinds and POWER FET for high voltage-high current is used.
6 signals connected from CONTROL BOARD ( SUS_UP, SUS_DN, E/R_UP, E/R_DN, RAMP, Z_BIAS ) adds to the gate of each FET
through buffer(IC1) and FET DRIVER IC (HCPL314J). The rest of 4 switch excluding RAMP and Z_BIAS have high frequency
of drive and many current frequency and much heat, so it is module type with IC and this module has FET and FET DRIVER IC (IR2113S).
On the other hand,when SUS_UP and SUS_DN comes in HIGH at the same time,it is supposed to Shut-down the FET DRIVER IC (IR2113S) to prevent them from turning ON at the same time.
The condenser for E/R (Energy Recovery) is fixed for pin 16(ER_COM)of IC4,5,6 to raise energy efficiency,and coils are put in the passage to the SUS_OUT line to fix output ascending and descending roll off when E/R part switching.
The SUS_OUT output formed in Z BOARD is supplied to all the ROW of every panel equally.
Z Board BLOCK DIAGRAM
Vs(170-190V)
SUS_UP
SUS_DN
E/R_UP
E/R_DN
RAMP Connected to PANEL.
`
3
1-b
2-b
1-a
2-a
Vz ( Vs-12V )
Z_BAIS
4
Z_SUS_OUT
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Z-Board Operation Principles
Schematic Diagram of Z Sustain Board
ER_UP
ER_DN
SUS_UP
SUS_DN
Vs
Vs
IPM for Sustain Pulse Generation and ER
The part for Ramp of Erase Pulse
L
SUS_OUT
LM317VzbVs
The part for Vzb
VR
Z bias
RAMP_UP
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When the screen is dark
. Though there is input signal pattern, screen brightness is dark on the whole.
1) Every input signal pattern is displayed but screen brightness is dark on the whole. In this case,
Z B/D may not work completely or the connection between controller B/D and VSC B/D may be unusual.
2) Check if the Controller B/D D1 LED is turned on and the state of connection line between VSC and
controller B/D .
3) Change the VSC or controller B/D.
4) Check if the power connector of Z B/D is connected.
5) Check if the connectors for signal of Controller B/D and Z B/D are connected well.
6) Without troubles , change the Z B/D or Controller B/D.
. In Full White screen, it looks like another color partly or generates wrong discharge.
1) Check if there are problems of Y B/D set up, set down wave form and roll-off adjustment.
2) Check if the roll-off of ramp wave form of Z B/D is normal.
3) Measure the output wave form of each B/D with oscilloscope above 500MHz and compare it with
the picture below.
setup roll-off of Y B/D is (Test-up:B/C[/]) VR1, setdown roll-off is(Test-down:D[]) VR2, ramp roll-off of Z B/D (Tramp:F/G[/])varies and adjusts VR1. Adjust as the notation contents of Label.
- Y B/D measure POINT : B41 ( Y_SUS_UP )
- Z B/D measure POINT : B39 ( Z_SUS_OUT )
0V
140us130us
110us
5us15us
12V
< Y sus_up wave form >
< Z sus_out wave form >
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ONE POINT SVC Guide Z-Board
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Insert to Z-Board and X-Board linking connector is badPicture is dark and wrong discharge(phenomenon)
Model name : MN-42PZ90main Check : Check the B+ terminal and cable connected to Z-BoardContent of badness : picture is dark and has too much noisemeasures : check the Z-Board and connector
ONE POINT SVC Guide Z-Board
Picture is dark and wrong discharge(phenomenon) Picture is dark and wrong discharge(phenomenon)
Model name : All modelsmain Check : Check the B+ terminal and cable connected to Z-BoardContent of badness : picture is dark and has too much noisemeasures : check the Z-Board and connector
Great Company Great People QAS 365QAS 365- 92 -
ONE POINT SVC Guide Z-Board
Check the port
50 KK 42 KK
. Contents to check when picture is dark1) check the cable connected from module control board to X-Board
2) check the X-Board
3) check the cable connected from X-Board to Z-Board
Great Company Great People QAS 365QAS 365- 93 -
5. Image Sticking Audit
LG Electronics/DND /CS Gr.
matters connected with after-image prevention function
1. The cause of after-image generation: When a fluorescent substance keeps radiating in same color in pixel(that is, when freeze picture continues) due to the radiation property of PDP Module, the color remains after changing the picture because of the Burning of the color.
2. After-image prevention function
1) change : It prevents from radiating of same color in one pixel by changing the whole screen in the direction of (right-right-down-down-left-left-left-up-up) at 2 minutes intervals. On this occasion, it moves 4 pixel when moving left and right, 2 pixel when moving up and down in pixel unit.
When it is initial location of the first screen ( 0, 0 ) direct practice the change function ( 4,0 ) : change of right 4 pixel after 2 minutes ( 8, 0 ) : change of right 4 pixel after 4 minutes ( 8, 2 ) : change of down 2 pixel after 6 minutes ( 8, 4 ) : change of down 4 pixel after 8 minutes ( 4, 4 ) : change of left 4 pixel after 10 minutes ( 0, 4 ) : change of left 4 pixel after 12 minutes ( 0, 2 ): change of UP 2 pixel after 14 minutes ( 0, 0 ): change of up 2 pixelIt is repeated until cancellation of change function
2) inversion : It displays original brightness value
3) removal : After generating after-image, it displays the whole screen in white and expresses all the Pixel(R,G,B) in maximum bright then can remove the after-image by erasing the Burned color
4) ISM : It prevents pixel from burning by decreasing the brightness automatically and slowly in PDPModule when the freeze picture keeps over 5 minutes. The darker the brightness of screen is ,the less the after-image generates, and ISM function built in Module is impossible for users tocontrol.
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ISM ( Image Sticking Minimization )
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Generation of After-image such as Letters and Logo in screen
X CANVAS
After-image remains due to watching same image for a long time (letters and others)Normal screen state
CANVASX
There is ISM Mode as an after-image prevention function, so it is programmed to make dark the screen in the caseof long time freeze picture . But it is for the whole animation screen, so it cant prevent partial letters and logoafter-image. Therefore pay attention not to display same image for a long time especially take notice not to displaysame image continually when displaying at the stores. (Take notice it is dealt with compensation when after-image generates )
Press the ADJ Key of remote control and connect to SVC Mode , Select WHITE at HEAT RUN then make HEAT RUNas much time as generation time of after-image. (when the after-image is intense, it cant be recovered )
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Matters connected with after-image prevention
When using change function
When using inversion function
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Module comparison
1. SD3 and SD4
- They are same Panel in structure but differ in drive method and set voltage.
- SD4 is low voltage model and lower voltage than general SD3 is set. In early stages it was developed in much low voltage but the voltage has been swelled compared to initial development goal because there are problems in varying and making only circuit and wave form with same panel
in conclusion , SD4 is the model developed for low voltage drive. Vs Va V setup -Vy Peak remark
SD3 170 ~ 185 60 ~ 75 210 ~ 240 -60 ~ -90 650SD4 170 ~ 185 35 ~ 45 210 ~ 240 -60 ~ -90 650
present Spec( 35 ~ 50 )
2. KK Model and general model
- KK model means each Contrast and Peak luminance is 1000 and it is the development goal.
- It has structural difference.
asymmetryT structure Close structure Xe : 8%KK model
Increased Preparing for
Mass production
symmetryStrips structure Strips structureXe : 5%General model
voltagedam ratioITORib structureGas
- Because KK model gets higher Xe component ratio, drive voltage increases in general.
- Image Streaking or after-image property may look lower than present model due to high Contrast and luminance, but it proved to have relative little difference comparing to general and other models.
- 99 -Great Company Great People QAS 365QAS 365
Global Quality Information (GQI)
Set Model MT-42PZ44 Quantity 1 No. : 000-000-0000
Set Serial No. 301KT00034
Module Model PDP42V51330
Vertical Line ( R , G , B Pattern) Vertical Bar ( R , G , B ) Horizontal Line ( R , G , B ) Horizontal Bar ( R , G , B ) No Raster Cell Defect External Defect Mal-discharge etc
Module Serial No. 312K142V5009368 Detail :
Country Netherlands
Customer purchase date 2004 / 04 / 05
Issued date 2004 / 04 / 30
PCB B/D defect only
Serial No. X-L-TOP(UP) X-C-TOP X-R-TOP PSU X-L-BTM(LOW) X-C-BTM X-R-BTM DC-DC Y-SUS Y-DRV-TOP Y-DRV-BTM CTRL Z-SUS etc
No.: the last line number of white label on B/D
Issued place Office or living room
Condition in use Use as monitor
Detailed repair records and
the resultincluding date
Replace Control Board( 2004 / 04 / 06 ): Not improved
COF defect only
Serial No.
Ex)Long2-4IC Fail or Register Fail
No.: the number of white label on inside COF
Pictures of Symptom
Symptom
2-1 2-2 2-3 2-4 2-5 2-6 2-7Long
Long1-1 1-2 1-3 1-4 1-5 1-6 1-7
1-1 1-2
Short 1-31-4
Back Side
Tip2-1
Short2-4
Defect part
White labelGreat Company Great People
EXAM
PLE
Plasma Display Panel structureAC-PDP discharge theoryAC-PDP discharge theory