LG-Goldstar 50PG4500

PLASMA TVSERVICE MANUAL

CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : PD82A

MODEL : 50PG4500 50PG4500-ZA

website:http://biz.LGservice.com

Internal Use Only

- 2 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ..........................................................................3

SPECIFICATION ........................................................................................4

ADJUSTMENT INSTRUCTION .................................................................7

TROUBLE SHOOTING ............................................................................16

BLOCK DIAGRAM...................................................................................24

EXPLODED VIEW .................................................................................. 25

SVC. SHEET ...............................................................................................

PRINTED CIRCUIT DIAGRAM ....................................................................


SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in theSchematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to preventX-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during theservicing of a receiver whose chassis is not isolated from the ACpower line. Use a transformer of adequate power rating as thisprotects the technician from accidents resulting in personal injuryfrom electrical shocks.

It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this monitor is blown, replace itwith the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor,over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to high vacuum and large surface area of picture tube,extreme care should be used in handling the Picture Tube.Do not lift the Picture tube by it's Neck.

Leakage Current Cold Check(Antenna Cold Check)With the instrument AC plug removed from AC source, connect anelectrical jumper across the two AC plug prongs. Place the ACswitch in the on position, connect one lead of ohm-meter to the ACplug prongs tied together and touch other ohm-meter lead in turn toeach exposed metallic parts such as antenna terminals, phonejacks, etc. If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver is returned to the customer.

Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet.Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using AC voltmeterwith 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat AC voltagemeasurements for each exposed metallic part. Any voltagemeasured must not exceed 0.75 volt RMS which is corresponds to0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument’sexposed METALLIC PARTS

Good Earth Groundsuch as WATER PIPE,CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF


SPECIFICATIONSNOTE : Specifications and others are subject to change without notice for improvement.

V Application RangeThis spec is applied to the PLASMA TV used PD82A Chassis.

V Specification

Each part is tested as below without special appointment.1) Temperature : 25±5°C (77±9°F), CST : 40±52) Relative Humidity: 65±10%3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz)

* Standard Voltage of each product is marked by models.4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with SBOM.5) The receiver must be operated for about 20 minutes prior to the adjustment.

V Test Method1) Performance : LGE TV test method followed.2) Demanded other specification

Safety : CE, IEC specificationEMC : CE, IEC

Chassis

PD82A 50PG6500

42PG6500

50PG4500

50PG7500

42PG3500

50PG3500

42PG2500

50PG2500

France LG

Model Name Market Brand Remark

50PG6500

42PG6500

50PG4500

50PG7500

42PG3500

50PG3500

42PG2500

50PG2500

Safety : IEC/EN60065

EMI : EN55013

EMS : EN55020

France

Model ApplianceMarket

TEST

Remark

V Module General Specification

1. 42” Module

2. 50” XGA Module

3. 50” FHD Module


Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

1

2

3

4

5

6

No Item Specification Remark

42 inch Wide Color Display Module

16:9

PDP42G1####,

RGB Closed Type, Glass Filter

1)Temp. : 0~40deg

2)Humidity : 20~80%

3)Temp. : -20~60deg

4)Humidity : 10~90%

100-240V~, 50/60Hz

PDP

LGE SPEC.

Maker LG


Aspect Ratio

PDP Module


Storage Environment

Input Voltage

1

2

3

4

5

6



16:9

PDP50PG1####,


1)Temp. : 0~40deg

2)Humidity : 20~80%

3)Temp. : -20~60deg

4)Humidity : 10~90%

100-240V~, 50/60Hz

PDP

LGE SPEC.

Maker LG


Aspect Ratio

PDP Module


Storage Environment

Input Voltage

1

2

3

4

5

6



16:9

PDP50H2####,


1)Temp. : 0~40deg

2)Humidity : 20~80%

3)Temp. : -20~60deg

4)Humidity : 10~90%

100-240V~, 50/60Hz

PDP

LGE SPEC.

Maker LG


V Model General Specification

Market

Broadcasting system

Receiving system

Scart Jack (2EA)

Video Input (1EA)

S-Video Input (1EA)

Component Input (1EA)

RGB Input(1EA)

HDMI Input(4EA)

Audio Input (3EA

1

2

3

4

5

6

7

8

9

10


France

1) PAL-BG

2) PAL-DK

3) PAL-I,I’

4) DVB-T(ID TV)

5) SECAM-L/L’

Analog : Upper Heterodyne

Digital : COFDM

PAL, SECAM

PAL, SECAM, NTSC

PAL, SECAM, NTSC

Y/Cb/Cr, Y/Pb/Pr

RGB-PC

HDMI-DTV & SOUND

PC Audio, Component, AV

4 System : PAL, SECAM, NTSC, PAL60

4 System : PAL, SECAM, NTSC, PAL60

L/R Input


ADJUSTMENT INSTRUCTION

1. Application ObjectThese instructions are applied all of the PLASMA TV, PD82A Chassis.

2. Note(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolationtransformer will help protect test instrument.

(2) Adjustment must be done in the correct order.(3) The adjustment must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity ifthere is no specific designation.

(4) The input voltage of the receiver must keep 100-240V~,50/60Hz.

(5) The receiver must be operated for about 5 minutes prior tothe adjustment.

O After RGB Full white HEAT-RUN Mode, the receiver mustbe operated prior to adjustment.

O Enter into HEAT-RUN MODE1) Press the POWER ON KEY on R/C for adjustment.2) OSD display and screen display PATTERN MODE.

* Set is activated HEAT-RUN without signal generator inthis mode.

* Single color pattern(RED/BLUE/GREEN) of HEAT-RUN mode uses to check PANEL.

3. ADC Calibration

V Auto adjustment Map(RS-232C)

- Baud : 115200bps, RS232 Host : PC, Echo : none.

4. Adjustment of AV Color Balance

4-1. Standard Equipment: 802F Pattern Generatorr. Master Pattern Generator(MSPG-

925, etc) or same product.

4-2. Required EquipmentO Remote controller for adjustment.O MSPG-925FS Pattern Generator. (Which has Video Signal:

7 Color Bar Pattern shown in Fig.1)-> Model: 202 / Pattern: 65 EC and FC model use PAL-

BGDHI(composite signal)

(1) Input the Video Signal: 7 Color Bar signal into AV3.(2) Set the PSM to Dynamic mode in the Picture menu.

(3) Press IN-START key on R/C for adjustment.(4) Press the G(Vol. +) key to operate the set, then it

becomes automatically.

5. Adjustment of Component




7 Color Bar Pattern shown in Fig.2)-> Model: 202 / Pattern: 65 EC and FC model use PAL-

BGDHI(composite signal)

(1) Input the Component 720p/50Hz 7 color BarPattern(MSPG-925FS model : 215, Pattern : 65) signal intoComponent.

(2) Set the PSM to Dynamic mode in the Picture menu.

(3) Press IN-START key on R/C for adjustment.(4) Press the G(Vol. +) key to operate the set, then it

becomes automatically.(5) Auto-RGB OK means the adjustment is completed.

* Using ‘power on’ button off the control R/C, power on TV.

If you turn on a still screen more than 20 minutes, (Especiallydigital pattern, cross hatch pattern) after image may be occur inthe black level part of the screen.

ADC adjust

Data Read

Default Write

Enter

Adjust Mode

ADC adjust

ADC Parameter

Digital Data

ADC Parameter

(Average)

Adjustment

Confirmation

Adjust Mode In

Adjust Mode Off

NO Item RemarkCMD1 CMD2 Data 0

A

A

A

A

A

A

A

D

D

D

D

D

D

D

0

0

0

0

0

0

0

1

2

3

4

9

0

9

Transfer 18Byte

(Input resolution Data)

To check ADC Adjusment

on Assembly line

When transger the ‘Mode

In’, Carry the command.

MSPG925FS

Component RGB-PCAVADC

Model : 3

(1024*768 60Hz)

Pattern : 65

7 Color Bar

Model:215(720P)

Pattern : 65

* 720P/50Hz

7 Color Bar

PAL

INPUT SELECT AV3

Model : 202

(PAL-BGDHI)

Pattern : 65

* PAL 7 Color Bar

(Fig.1) 7 color Bar signal

(Fig.2) 7 color Bar signal

6. Adjustment of RGB




7 Color Bar Pattern shown in Fig.3)

(1) Input the PC 1024x768@60Hz 7color Bar(MSPG-925,Model:3, Pattern:65) into RGB.(using D-sub to D-sub cable)

(2) Set the PSM to Dynamic mode in the Picture menu.

(3) Press IN-START key on R/C for adjustment.(4) Press the G(Vol. +) key to operate To set, then it becomes

automatically.(5) Auto-RGB OK means the adjustment is completed.(6) Press the G(Vol. +) key to operate the set, then it

becomes automatically.(7) Auto-RGB OK means the adjustment is completed.

7. Channel memory Setting Method: Recovery the channel memory by adjust R/C.

1) Press ADJ key on R/C for adjustment.2) Press VOL + key on “Channel Recover”.

8. PCMCIA CARD Checking Method: You must adjust DTV 29 Channel and insert PCMCIA CARD

to socket.

1) If PCMCIA CARD works normally, normal signals displayon screen. But it works abnormally, “No CA module” wordsdisplay on screen.

9. POWER PCB Assy VoltageAdjustments (Va, Vs Voltage adjustments)

9-1. Test Equipment : D.M.M. 1EA

9-2.Connection Diagram for Measuring: refer to Fig.4

9-3. Adjustment Method(1) Va Adjustment

1) After receiving 100% Full White Pattern, HEAT RUN.2) Connect + terminal of D.M.M to Va pin of P811, connect

- terminal to GND pin of P811.3) After turning RV901, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.(Deviation; ±0.5V)

(2) Vs Adjustment1) Input signal : RF noise signal.2) Connect + terminal of D.M.M to Vs pin of P811, connect

– terminal to GND pin of P811.3) After turning RV951, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.(Deviation; ±0.5V)


(Fig.3)

* Befor power off, input mode must be changed RF mode.

Each PCB assembly must be checked by check JIG set.(Because power PCB Assembly damages to PDP Module,especially be careful)

(Fig.4) Connection diagram of power adjustment for measuring

8. EDID(The Extended Display Identification Data )

/DDC(Display Data Channel) download

8-1. Required Test Equipment(1) Adjusting PC with S/W for writing EDID Data.

(S/W : EDID TESTER Ver.2.5)(2) A Jig for EDID Download.(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub

15Pin cable, DVI to HDMI cable.

8-2. Required Test Equipment

8-3. Preparation for Adjustment1) As above Fig.5, Connect the Set, EDID Download Jig, PC

& Cable.2) Turn on the PC & EDID Download Jig. And Execute the

S/W : EDID TESTER Ver,2.5.3) Set up S/W option.

Repeat Number : 5Device Address : A0PageByte : 8

4) Power on the Set.

8-4. Sequence of Adjustment(1) EDID Download

1) Init the data.

2) Load the EDID data.(Open File).

[ Analog file ] (for RGB)][ Digital file ] (for HDMI)

3) Set the S/W as below.4) Push the “Write Data & Verify”button. And confirm “Yes”.5) If the writing is finished, you will see the “OK” message.

6) If TV has two HDMI, you must download two times foreach HDMI.

8-5. EDID DATA1) Analog-RGB.

=> Detail EDID Options are below([1],[2],[3],[4],[5])

1.[1]-Product ID

2. [2]-Serial No : Controlled on production line.3. [3]-Month, Year : Controlled on production line.

ex) Monthly: '03' => '03' Year : '2006' => '10'

4. [4]-Model Name : model name.

5. [5]-Checksum (7EH) -> Changeable by total EDID data.


(Fig.5) Connection Diagram of DDC download

[1] [2]

[3]

[4]

[5]

Open File

50PG6500

Product IDProduct IDModel Name

EDID table

B19C

Hex

9CB140013

50PG6500 00 00 00 FC 00 35 30 50 47 36 35 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

2) HDMI 1.


1.[1]-Product ID

2. [2]-Serial No : Controlled on production line.3. [3]-Month, Year : Controlled on production line.

ex) Monthly: '03' => '03' Year : '2006' => '10'

4. [4]-Model Name : model name.

5. [5]-Checksum (7EH) -> Changeable by total EDID data.

3) HDMI 2.


* Please refer HDMI 1- EDID Download is needed HDMI 1~ HDMI 4.


[1] [2][3]

[4]

[5]

[5]

50PG6500 00 00 00 FC 00 35 30 50 47 36 35 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

50PG6500

Product IDProduct IDModel Name

EDID table

B29C

Hex

9CB240114

[1] [2][3]

[4]

[5]

[5]

9. Adjustment of White Balance

9-1. Required Equipment(1) Remote control for adjustment.(2) Color Analyzer : CA-100+, CA210 or same product.

- CH : 10(3) Auto W/B adjustment instrument.(only for Auto adjustment)(4) AV Pattern Generator.

W Color temperature standards according to CSM and Module.

W CS-1000/CA-100+/CA-210(CH 10) White balance adjustmentcoordinate and color temperature.

* PC(for communication through RS-232C)-> UART Baud rate : 115200 bps

9-2. Connection Picture of the MeasuringInstrument(On Automatic control)

(1) Inside PATTERN is used when W/B is controlled. Connectto auto controller or push control R/C IN-START -> Enterthe mode of White-Balance, the pattern will come out.

9-3. Auto-control interface and directions(1) Adjust in the place where the influx of light like floodlight

around is blocked.(illumination is less than 10ux)(2) Measure and adjust after sticking the Color Analyzer(CA-

100+, CA210) to the side of the module.(3) Aging time

- After ajing start, keep the power on(no suspension ofpower supply) and heat-run over 15minutes.

- keep white pattern using inside pattern.

V Auto adjustment Map(RS-232C)

10. Adjustment of White Balance(Manual white Balance)

V One of R Gain/ G Gain/ B Gain should be kept on 80, andothers are controlled lowering from 80

(1) Press ‘power on’ of the control R/C, set heat run to whiteby pressing and heat run over 15 minutes.(Set: RS-232Host: PC, Baud Rate: 115200bps, Download: Cortez)

(2) Zero Calibrate CA-100+, and stick the sensor to the centerof PDP module surface when you adjust.

(3) Double click In-start key on Controlling R/C and get in‘white balance’.

(4) Set test-pattern on and display inside pattern. Control iscarried out on three color temperature, COOL, MEDIUM,WARM. (Control is carried out three times.)

(5) When the R/G/B GAIN is 80 on OSD, it is the FULLDYNAMIC Range of the Module. In order to control whitebalance without the saturation of FULL DYNAMIC Rangeand DATA, one of R Gain / G Gain / B Gain should be kepton 80, and other two is controlled lowering from 80.

* Color Temperature: Cool, Medium, Warm(1) When R GAIN is set to 80- Control G GAIN and B GAIN by lowering from 80. (2) When B GAIN is set to 80- Control R GAIN and G GAIN by lowering from 80.(3) When G GAIN is set to 80- Control R GAIN and B GAIN by lowering from 80.

One of R Gain / G Gain / B Gain should be kept on 80, andadjust other two lower than 80.(When R/G/B GAIN are all 80, it is the FULL DYNAMICRange of Module)

11. Input the Shipping Option Data 1) Push the IN-START key in a Adjust Remocon.2) Input the Option Number that was specified in the BOM, into

the Shipping area.3) The work is finished, Push V Key.


* Befor adjusting White-balance, the AV ADC should be done.If ADC status were “NG”, Need to ADC adjustment.

PLASMA Remark

11000K

9300K

6500K

Cool

Normal

Warm

CSM

Color Coordinate

x y

0.283±0.002

0.293±0.002

0.329±0.002

11,000K

9,300K

6,500K

0.000

0.000

0.003

0.276±0.002

0.285±0.002

0.313±0.002

COOL

MEDIUM

WARM

CSM Temp uv

(Fig.6) Auto AV(CVBS) Color Balance Test Pattern

Full White Pattern

RS-232C Communication

CA-210

ColorANALYZER

TYPE : CA-210

Type

Baud Rate

115200

Index

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

Data bit

8

Cmd1 Cmd2

j a

j b

j c

j d

j e

j f

Stop bit

1

Parity

NONE

PD82A

ProtocolSetting

Data Min Value

00(00)

00(00)

00(00)

00(00)

00(00)

00(00)

Max Value

128(80)

128(80)

128(80)

128(80)

128(80)

128(80)

12. Default Value in Adjustment mode

12-1. Auto Color Balance

12-2. Write Balance

13. EEPROM Data Write(Serial No D/L)

13-1. Signal TABLE

CMD : A0h LENGTH : 85~94h (1~16 bytes)ADH : E2PROM Sub Address high (00~1F)ADL : E2PROM Sub Address low (00~FF)Data : Write dataCS : CMD + LENGTH + ADH + ADL + Data_1 + ... + Data_nDelay : 20ms

13-2. Command Set

* DescriptionFOS Default write : <7mode data> writeVtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, PhaseData write : Model Name and Serial Number write in EEPROM,.

13-3. Method & Notice(1) Serial number D/L is using of scan equipment.(2) Setting of scan equipment operated by Manufacturing

Technology Group.(3) Serial number D/L must be conformed when it is produced

in production line, because serial number D/L is mandatoryby D-book 4.0.

14. Set Information(Serial No& Model name, Option Table)

14-1. Setting up ‘Tool Option1,2’(After setting white balance, this is set)(Setting: Press ADJ Key in the Adjust remocon)

(1) Press ADJ Key in the R/C for adjustment.(2) Insert Option value by a number key.(3) Press the Enter Button.


(Fig. 7) Default on OSD

<Component> <RGB>

<AV>

(Fig. 8) Default on OSD

CMD LENGTH ADH ADL DATA_1 DATA_n... CS DELAY

Model

Name

42PG6500

Tool

Option1

10240 1697 0 14 2 1 192

Tool

Option2

Area

OptionOption1 Option2 Option3 Option4

No

1 EEPROM WRITE A0h 84h+n n-byted Write

(n=1~16)

Adjust mode CMD(hex) LENGTH(hex) Description

14-2. Check the serial number & Model Name

(1) Push the menu button in DTV mode.- Select the STATION-> Diagno stics -> To set.

(2) Check the Serial Number.



TROUBLE SHOOTING GUIDE

1. Power Board

1-1. The whole flowchart which it follows in voltage output state

Start check

Manufacture enterprisemeaning of a passage

1. Check the Power Offcondition.

Doesn't the screen whole come

out?

Is it identical with Power Off

condition?

Yes

Yes

No

No

No

No

No

2. Check the Interfacesignal condition.

Is the Interface signal operated?

Yes

3. Check the St-by 5Vsignal circuit.

Doesn't the low pressure output

come out?

Doesn't the St-by 5V signal

come out?

Yes

Yes

No

4. Check the 5V Monitorsignal circuit.

Doesn't the 5V Monitor signal

come out?

Yes

7. Check the VSC Vs-ONsignal

Doesn't the high tension output

come out?

Doesn't the VSC signal Vs-ON

come out?

Yes

Yes

Doeshigh tension

output voltage Dropoccur?

When theY B/D Module

input connector isremoved, does output

voltage dropoccur?

When theY, Z B/D Module

input connector is remove,does Power Board hightension

output voltage Dropoccur?

Yes No No

9. Check the PowerBoard Output high

tension circuit

Yes

10. Check the Z B/DModule output circuit

Yes

When theZ B/D Module

input connector isremoved, does output

voltage Drop occurs?

11. Check the Y B/DModule output circuit

Yes

No

8. Check the Vs, Vavoltage output circuit.

Doesn't the Vs, Va voltage output

come out?

Yes

No

No

5. Check the VSC RL-ONsignal.

Doesn't the VSC signal RL-ON

come out?

Yes

6. Check the VSC lowpressure output

Doesn't the VSC low pressureoutput come out?

Yes


1-2. 50” Power Board Structure

(1) Pin Layout

(2) Pin Spec

SC101 P813 P811 P812

AC INLET MAIN BOARD PDP MODULE

AC

NC

AC

YH396-03

16V

GND

12V

GND

5VSC

5VSC

GND

GND

5V_MNT

RL_ON

M5V_ON

M5V_ON

GND

GND

GND

GND

5V_MNT

AC_DET

RL_ON

VS_ON

M5V_ON

AUTO_GND

SMH200-22P

Vs

Vs

NC

GND

GND

Va

Va

GND

M5V

M5V

YH396-10P

Vs

Vs

NC

GND

GND

Va

Va

GND

M5V

M5V

YH396-10P

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

Description

NO


2. No Power

(1) Symptom1) Doesn’t minute discharge at module. 2) Non does not come in into the front LED.

(2) Check following

Is plug in power cord? Plug in power cord.

Yes

No

Is the Line Filter and PowerBoard Cable connected?

Connect the Cable.

Yes

No

Is the Fuse(F101) onPower Board normal?

Replace the Fuse.

Yes

No

Is the Power Board and 13P ofVSC Board Cable connected?

Connect the Cable.

Yes

No

After the cable connect is removedto Power Board(except the SC101connection cable), the AC voltagemarking is authorized on manual.When ST-BY 5V is not operated,replace Power Board.


3. Protect Mode

(1) Symptom1) After once shining, it does not discharge minutely

from module.2) The Rely falls.(The sound is audible “click”) 3) It is converted with the color where the front LED

is red from green.

(2) Check following

Is the Power Boardnormal ?

Replace PowerBoard.

Is output the normality Low/Highvoltage except Stand-by 5V?

Yes

No No

Is the each connectornormal?

Replace theconnector.

ReplaceY-Board.

After connecting well each connector,the normality it operates?

Yes

No Yes

Is the Ctrl Boardnormal?

ReplaceX-Board.

Is the output voltage normal afterremove P1, 2, 4, 9, 10 connector of

Ctrl-B/D?

Yes

No Yes

Is the Y-Boardnormal?

Is the output voltagenormal after removeP103 connector of

Y-B/D?

Is the Fuse(FS101,FS102) on Y-B/Dnormal?(In case of open is replace)

Yes

No Yes Yes

ReplaceZ-Board.

Is the Z-Boardnormal?

Is the output voltagenormal after removeP1 connector of Z-

B/D?

Is the Fuse (FS1, FS2) on Z-B/Dnormal? (In case of open is replace)

Yes

No Yes

Is the X- Boardnormal?

Is the output voltage normal afterremove P1, 2, 3, 4, 5 connector of

X-B/D?

After remove P1, P2, P3 output voltagenormality: Replace Right X-B/DAfter remove P4, P5 output voltagenormality: Replace Left X-B/D

Yes

No Yes

Is the VSC Board normal?

Is the output voltage normal afterremove P901?

After crisis COF of each board, check the normality operates.If in case normality operates, correspondence COF Fail is replace the module.

After remove P901 normaloperation: Replace VSC Board

Yes

No

Is the COF of X, Y, Znormal ?

No

Yes

Yes


Does minute dischargeAt Module?

Is the LVDC cablenormal?

Is the VAVS on?

Check the PDP ModuleYes

No

YES

Yes

Reconnect the LVDScable in P800

No

Is the IC700(FLI8548)Output normal?

Replace the VSC.No

NO Replace the Powerboard

Is output the normalityLow/High voltage except

stand-by 5V?

NO

4. No Raster

(1) Symptom1) No OSD and image occur at screen. 2) It maintains the condition where the front LED is green.

(2) Check following


5. In case of occurring strange screen into specific mode

5-1. In case the OSD does not displayed

(1) Symptom1) LED is green.2) The minute discharged continuously becomes Accomplished from module.

(2) Check following

Is the LVDS cablenormal ?

Is the VSC Boardnormal?

Is the LVDS cableconnected?

Re-insert the Cable inserts.Yes

No

No

Yes

Does the FIL8548IC(IC700) Operates ?

Replace FIL8548IC(IC700)

No

Is the Ctrl Board ofModule normal?

Replace Ctrl B/D.No

No

YesReplace hte VSC B/D

Replace the cable.Yes


5-2. In case of does’t display the screen into specific mode

(1) Symptom1) The screen does not become the display from specific input mode

(RF, AV, Component, RGB, DVI).

(2) Check following1) Check the all input mode should become normality display.

(3) In case of becomes unusual display from RF mode

(4) In the case of becomes unusual display from side S-video/AV mode

Is the Tuner normal?

Is the CXA2069Q normal?

Is the Tuner Cable connected?

Re-insert the Cable.Yes

No

No

Yes

Is the FIL8548 normal?

Replace the Tuner.

No

Is the Input voltage, IIC Communicationand CVBS output normal?

Yes

Is the Input voltage, IICCommunication normal?

NoReplace the IC.

No

Is normal the Input voltage, IICCommunication?

No

Block A

Replace the IC.No

Is the Video input of the AVJack(JK1203)normal?

Yes

Is the CXA2069Q normal?

Check the input source and CableNo

Is the Input voltage, IICCommunication normal?

NoReplace the IC.

No

Yes

Same as Block A


(5) In the case of becomes unusual display from Component, RGB mode

(6) In the case of becomes unusual display from HDMI mode

(7) In the case of becomes unusual display from SCART1 mode

(8) In the case of becomes unusual display from SCART2 mode

Is theR,G,B input and H,VSync of the J1100 normal?

Check the input sourceNo

Is the HDMI(IC1000)normal?

Yes

Same as Block A

Is the Input and Output signal,IICCommunication normal?

No

Is the Video input od A/VJack(J1200) normal?

Yes

Same as Block A


Replace the IC.No

Is the Video input od A/VJack(J1201) normal?

Yes

Same as Block A


Yes

Same as Block A


6. In case of no sound

(1) Symptom1) LED is Green.2) Screen display but sound is not output.

(2) Check following

All input(mode) is nosound?

Only HDMI is NoSound?

Yes

No

Downloadthe EDID data

Check the signal afterCAX2069 refer to circuit diagram

Yes

Only specific input(except HDMI,DTV,RF)

is no sound?

Check the signal beforeCAX2069 refer to circuit diagram

No

No YES

Only RF is no sound?Check

the Tuner IN/OUT

Yes

No

YES

Only AV/component/PCinput is no sound?

Is the output ofCXA2069 normal?

Yes

No

IC1300 operatesnormal?

Replace the IC1300(MSP4450)

No

IC1301 operatesnormal?

Replace the IC1301(NTP-3000A)

No

YES

Replace the VSC B/D

YES

NoReplace the CXA2069

Is the speaker On itmenu?

Set on speaker in menu.No

Is the speaker Cablenormal?

Check the SpeakerCable.

No

Yes

- 23-

LGE

Internal Use O

nlyC

opyright©2008 LG

Electronics. Inc. A

ll right reserved. O

nly for training and service purposes

BL

OC

K D

IAG

RA

M

HD

MI4

HD

MI4

CommonInterface

LVDS

AV1AV1 DTVO utMNTO ut

RGBRGB

PCA UDIOPCA UDIO

STi7101MPEG Decoder

3.3V

5V

FLI8548H - LF(CORTEZ Plus)

Dig ital VideoProcessor

HDMI2HDMI2

HDMIS/ W(3 : 1)

CXA2069QAUDIO/ VIDEO

SW9V9V

MSP4450KSound

Processor9V

5V

NTP300AAudio IC

18

V18

V

VL

RY

/CV

LR

Y/C

Component

YP

bP

rL

RY

Pb

Pr

LR

HDMI3HDMI3

SPDIFSPDIF

HDMI1HDMI1

HDMIRX

(2 : 1)HDMIBuf fer

74LCX157

3.3

VRS-232RS-232

DTV_CLK

Bu

ffer

Hsync, Vsync,D E

RGB2 4Bit

TM

DS

TM

DS

TMDS

TMDS

Hsync, Vsync,D E

RGB2 4Bit

FE

_TS

_DA

TA

CI_TS_DATA

TS

_DA

TA

Bu

ffer

SIF/ AM_AUDIO

TV_VOUT

I2S_DTV

I2S

_HD

MI

I2S

HD

MI_

CLK

AV

R/L

OU

T

TV

R/L

OU

T

I2S

REC8

TU_MAIN

CVBS/ Y/ C,L / R

DT

V/M

NT

V,

R/L

OU

T

CVBS,D TVL / RO UT

SC

AR

TV

,R

/LIN

TV

R/L

OU

TSPDIF_OUT

CO

MP

&P

CR

/LIN

PC

R/G

/B,

H/V

Syn

c

SC

AR

TR

/G/B

/FB

CO

MP

Y/P

b/P

r

CE

C

MA

INV

/Y/C

OU

T

D/ ASynthesis

Tuner

ICL323

2

74

LC

X1

57

DEMUX

DEMUXCOMM_UART_TX

COMM_UART_RX

UART0_RX UART1_RX

UART0_TX UART1_TX

RX

/TX

RX

/TX

DEBUG_UART_TX/ RXUART0_TX/ RX

DEBUG_UART_TX/ RX

1.8V

2.5V

3.3V

1.0V

2.6V

3.3V

1.8V1.8V

3.3V3.3V

5V5V

3.3

V

1.8

V

3.3

V

1.8

V

TMDS

CE

C

Hsyn

c,

Vsyn

c,

DE

RG

B24

Bit

LVDS

I2S

PCR / LI N

CO

MP

R/L

IN

FE_TS_DATA

Sound & Video SignalSound Signal

Video Signal Etc. Signal

- 24-

LGE

Internal Use O

nlyC

opyright©2008 LG

Electronics. Inc. A

ll right reserved. O

nly for training and service purposes

CORTEZPlus

SCL_EEPR/SDA_EEPR

IC70124LC256 EEPROM

IC1400 CXA2069

IIC Line

MSTR0_SCL

MSTR0_SDA

SCL/SDA

IC1301NTP300A

IC1300 MSP4450K

TU600TUNER(Analog)

IC702 M62320

IC1000 SIL9125

HDMI Receiver

SCL/SDA

VGA0_SCL

VGA0_SDA

STI7101

+3.3V

IC30424LC256 EEPROM

PIO4_0/SSC2_SCL

PIO4_1/SSC2_MRST/SSC2_MTSR

I2C_SCL1/I2C_SDA1

4.7K‰

3.3V_CTZ

4.7K‰

MSTR1_SCL

MSTR1_SDA

P_3.3V

4.7K‰

MSTR2_SCL

MSTR2_SDA

5.0V

4.7K‰

SCL_5V/SDA_5V

SCL_5V/SDA_5V SCL_5V/SDA_5V

SW_TU_SCL/SW_TU_SDA

5V_TU

6.2K‰

TU600 TUNER

(DIGITAL)

MODULE

SCL/SDA

- 25 - LGE Internal Use Only

EXPLODED VIEW

300

120

305

301

302

200

201204

590501

205206

202

203

240

250

303

304

208

603

520

400

401

602 601

580207

570560

A2

900

Many electrical and mechanical parts in this chassis have special safety-related characteristics. Theseparts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components asrecommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes





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June, 2008Printed in KoreaP/NO : MFL41435504

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