LG 42PG6500 Schematic

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Page 1

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PD82A

MODEL : 42PG6500 42PG6500-ZA

website:http://biz.LGservice.com

Internal Use Only

Page 2

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Only for training and service purposes

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION .................................................................6

TROUBLE SHOOTING............................................................................15

BLOCK DIAGRAM...................................................................................23

EXPLODED VIEW .................................................................................. 24

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

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

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Only for training and service purposes

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic 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 prevent X-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 the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

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

If any fuse (or Fusible Resistor) in this monitor is blown, replace it with 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 an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver 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 capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument’s exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

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Only for training and service purposes

SPECIFICATIONS

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

V Application Range

This spec is applied to the 42” 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±5

2) 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 Method

1) Performance : LGE TV test method followed.

2) Demanded other specification

Safety : CE, IEC specification EMC : CE, IEC

V General Specification ( 50” Module )

Display Screen Device Aspect Ratio PDP Module

Operating Environment

Storage Environment

Input Voltage

1 2 3

No Item Specification Remark

42” Wide Color Display Module 16:9 PDP42PG1, 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

Plasma Display Panel

LGE SPEC.

Maker : LG

Chassis

PD82A 42PG6500 France LG

Model Name Market Brand Remark

42PG6500 Safety : IEC/EN60065

EMI : EN55013 EMS : EN55020

France

Model ApplianceMarket

TEST

Remark

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Only for training and service purposes

V Module Specification2

Market roadcasting 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

4 5 6 7 8 9

No Item Specification Remark

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

Analog Only

4 System : PAL, SECAM, NTSC, PAL60 4 System : PAL, SECAM, NTSC, PAL60

L/R Input

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Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied all of the 42” 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 isolation

transformer 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 if

there 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 to

the adjustment.

O After RGB Full white HEAT-RUN Mode, the receiver must

be operated prior to adjustment.

O Enter into HEAT-RUN MODE

1) 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 in

this mode. * Single color pattern(RED/BLUE/GREEN) of HEAT-RUN

mode uses to check PANEL.

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 Equipment

O 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 PALBGDHI(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

5-1.

Standard Equipment

: 802F Pattern Generatorr. Master Pattern Generator(MSPG-

925, etc) or same product.

5-2. Required Equipment

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

7 Color Bar Pattern shown in Fig.2)

-> Model: 202 / Pattern: 65 EC and FC model use PALBGDHI(composite signal)

(1) Input the Component 720p/50Hz 7 color Bar

Pattern(MSPG-925FS model : 215, Pattern : 65) signal into Component.

(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, (Especially digital pattern, cross hatch pattern) after image may be occur in the 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

Remark

CMD1 CMD2

Data 0 A A A A

D D D D

0 0 0 0

1 2 3 4

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

Page 7

6. Adjustment of RGB

6-1.

Standard Equipment

: 802F Pattern Generatorr. Master Pattern Generator(MSPG-

925, etc) or same product.

6-2. Required Equipment

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

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 display

on screen. But it works abnormally, “No CA module” words

display on screen.

9. POWER PCB Assy Voltage Adjustments (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 Adjustment

1) 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)

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Only for training and service purposes

(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

Page 8

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 Adjustment

1) 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 : 5

Device Address : A0

PageByte : 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.

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 for each HDMI.

8-5. EDID DATA

1) 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.

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Only for training and service purposes

(Fig.5) Connection Diagram of DDC download

[1]

[2]

[3]

[4]

[5]

Open File

42PG6500

Product ID

Product IDModel Name

EDID table

119D

Hex

9D11

40209

42PG6500

00 00 00 FC 00 34 32 50 47 36 35 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

Page 9

2) HDMI 1.

=> 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.

3) HDMI 2

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

* Please refer HDMI 1

- EDID Download is needed HDMI 1~ HDMI 4.

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Only for training and service purposes

[1]

[2]

[3]

[4]

[5]

42PG6500

00 00 00 FC 00 34 32 50 47 36 35 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

42PG6500

Product ID

Product IDModel Name

EDID table

129D

Hex

9D12

40210

[1] [2]

[3]

[4]

[5]

Page 10

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 adjustment

coordinate and color temperature.

* PC(for communication through RS-232C)

-> UART Baud rate : 115200 bps

9-2. Connection Picture of the Measuring

Instrument(On Automatic control)

(1) Inside PATTERN is used when W/B is controlled. Connect

to auto controller or push control R/C IN-START -> Enter the 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 of power 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, and

others are controlled lowering from 80

(1) Press ‘power on’ of the control R/C, set heat run to white

by pressing and heat run over 15 minutes.(Set: RS-232 Host: PC, Baud Rate: 115200bps, Download: Cortez)

(2) Zero Calibrate CA-100+, and stick the sensor to the center

of 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 is

carried 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 FULL

DYNAMIC Range of the Module. In order to control white balance without the saturation of FULL DYNAMIC Range and DATA, one of R Gain / G Gain / B Gain should be kept on 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, and adjust other two lower than 80. (When R/G/B GAIN are all 80, it is the FULL DYNAMIC Range 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.

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Only for training and service purposes

* 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

0.283±0.002

0.293±0.002

0.329±0.00

11,000K

9,300K 6,500K

0.000

0.003

0.276±0.002

0.285±0.002

0.313±0.00

COOL

MEDIUM

WARM

CSM Temp uv

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

Full White Pattern

RS-232C Communication

CA-210

Color

ANALYZER

TYPE : CA-210

Type

Baud Rate

115200

Index R Gain G Gain B Gain

R Offset G Offset B Offset

Data bit

Cmd1 Cmd2

ja jb jc jd je jf

Stop bit

Parity

NONE

PD82A

Protocol

Setting

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)

Page 11

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 : E

PROM Sub Address high (00~1F)

ADL : E

PROM Sub Address low (00~FF) Data : Write data CS :

CMD + LENGTH + ADH + ADL + Data_1 + ... + Data_n

Delay : 20ms

13-2. Command Set

* Description

FOS Default write : <7mode data> write Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase Data 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 mandatory by 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.

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Only for training and service purposes

(Fig. 7) Default on OSD

<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

Option

Option1 Option2 Option3 Option4

EEPROM WRITE

A0h 84h+n n-byted Write

(n=1~16)

Adjust mode CMD(hex) LENGTH(hex) Description

Page 12

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.

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Only for training and service purposes

Page 13

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Only for training and service purposes

TROUBLE SHOOTING GUIDE

1. Power Board

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

Start check

Manufacture enterprise

meaning of a passage

1. Check the Power Off condition.

Doesn't the

screen whole come

out?

Is it identical

with Power Off

condition?

Yes

2. Check the Interface signal condition.

Is the Interface

signal operated?

Yes

3. Check the St-by 5V signal circuit.

Doesn't the

low pressure output

come out?

Doesn't the

St-by 5V signal

come out?

Yes

4. Check the 5V Monitor signal circuit.

Doesn't the

5V Monitor signal

come out?

Yes

7. Check the VSC Vs-ON signal

Doesn't the

high tension output

come out?

Doesn't the

VSC signal Vs-ON

come out?

Yes

Does

high tension

output voltage Drop

occur?

When the

Y B/D Module

input connector is

removed, does output

voltage drop

occur?

When the

Y, Z B/D Module

input connector is remove,

does Power Board hightension

output voltage Drop

occur?

Yes No No

9. Check the Power Board Output high

tension circuit

Yes

10. Check the Z B/D

Module output circuit

Yes

When the

Z B/D Module

input connector is

removed, does output

voltage Drop

occurs?

11. Check the Y B/D

Module output circuit

Yes

8. Check the Vs, Va

voltage output circuit.

Doesn't the

Vs, Va voltage output

come out?

Yes

5. Check the VSC RL-ON signal.

Doesn't the

VSC signal RL-ON

come out?

Yes

6. Check the VSC low pressure output

Doesn't the

VSC low pressure

output come out?

Yes

Page 14

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Only for training and service purposes

1-2. 42” 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

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 GND M5V M5V

YH396-10P

Vs Vs

NC GND GND

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

Page 15

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Only for training and service purposes

2. No Power

(1) Symptom

1) 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

Is the Line Filter and Power

Board Cable connected?

Connect the Cable.

Yes

Is the Fuse(F101) on

Power Board normal?

Replace the Fuse.

Yes

Is the Power Board and 13P of

VSC Board Cable connected?

Connect the Cable.

Yes

After the cable connect is removed to Power Board(except the SC101 connection cable), the AC voltage marking is authorized on manual. When ST-BY 5V is not operated, replace Power Board.

Page 16

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Only for training and service purposes

3. Protect Mode

(1) Symptom

1) 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 Board

normal ?

Replace Power

Board.

Is output the normality Low/High

voltage except Stand-by 5V?

Yes

Is the each connector

normal?

Replace the

connector.

Replace

Y-Board.

After connecting well each connector,

the normality it operates?

Yes

Is the Ctrl Board

normal?

Replace

X-Board.

Is the output voltage normal after

remove P1, 2, 4, 9, 10 connector of

Ctrl-B/D?

Yes

Is the Y-Board

normal?

Is the output voltage normal after remove

P103 connector of

Y-B/D?

Is the Fuse(FS101,FS102) on Y-B/D

normal?(In case of open is replace)

Yes

Yes Yes

Replace

Z-Board.

Is the Z-Board

normal?

Is the output voltage normal after remove

P1 connector of Z-

B/D?

Is the Fuse (FS1, FS2) on Z-B/D

normal? (In case of open is replace)

Yes

Is the X- Board

normal?

Is the output voltage normal after

remove P1, 2, 3, 4, 5 connector of

X-B/D?

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

Yes

Is the

VSC Board normal?

Is the output voltage normal after

remove 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 normal operation: Replace VSC Board

Yes

Is the COF of X, Y, Z

normal ?

Yes

Page 17

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Only for training and service purposes

Does minute discharge

At Module?

Is the LVDC cable

normal?

Is the VAVS on?

Check the PDP Module

Yes

YES

Yes

Reconnect the LVDS

cable in P800

Is the IC700(FLI8548)

Output normal?

Replace the VSC.

Replace the Power

board

Is output the normality

Low/High voltage except

stand-by 5V?

4. No Raster

(1) Symptom

1) No OSD and image occur at screen.

2) It maintains the condition where the front LED is green.

(2) Check following

Page 18

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Only for training and service purposes

5. In case of occurring strange screen into specific mode

5-1. In case the OSD does not displayed

(1) Symptom

1) LED is green.

2) The minute discharged continuously becomes Accomplished from module.

(2) Check following

Is the LVDS cable

normal ?

Is the VSC Board

normal?

Is the LVDS cable

connected?

Re-insert the Cable inserts.

Yes

Does the FIL8548

IC(IC700) Operates ?

Replace FIL8548

IC(IC700)

Is the Ctrl Board of

Module normal?

Replace Ctrl B/D.

Yes

Replace hte VSC B/D

Replace the cable.

Yes

Page 19

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Only for training and service purposes

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

(1) Symptom

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

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

(2) Check following

1) 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

Is the FIL8548 normal?

Replace the Tuner.

Is the Input voltage, IIC Communication

and CVBS output normal?

Yes

Is the Input voltage, IIC

Communication normal?

Replace the IC.

Is normal the Input voltage, IIC

Communication?

Block A

Replace the IC.

Is the Video input of the AV

Jack(JK1203)normal?

Yes

Is the CXA2069Q normal?

Check the input source and Cable

Is the Input voltage, IIC

Communication normal?

Replace the IC.

Yes

Same as Block A

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Only for training and service purposes

(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,V

Sync of the J1100 normal?

Check the input source

Is the HDMI(IC1000)

normal?

Yes

Same as Block A

Is the Input and Output signal,IIC

Communication normal?

Is the Video input od A/V

Jack(J1200) normal?

Yes

Same as Block A

Check the input source

Replace the IC.

Is the Video input od A/V

Jack(J1201) normal?

Yes

Same as Block A

Check the input source

Yes

Same as Block A

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Only for training and service purposes

6. In case of no sound

(1) Symptom

1) LED is Green.

2) Screen display but sound is not output.

(2) Check following

All input(mode) is no

sound?

Only HDMI is No

Sound?

Yes

Download

the EDID data

Check the signal after

CAX2069 refer to circuit diagram

Yes

Only specific input

(except HDMI,DTV,RF)

is no sound?

Check the signal before

CAX2069 refer to circuit diagram

No YES

Only RF is no sound?

Check

the Tuner IN/OUT

Yes

YES

Only AV/component/PC

input is no sound?

Is the output of

CXA2069 normal?

Yes

IC1300 operates

normal?

Replace the IC1300

(MSP4450)

IC1301 operates

normal?

Replace the IC1301

(NTP-3000A)

YES

Replace the VSC B/D

YES

Replace the CXA2069

Is the speaker On it

menu?

Set on speaker in menu.

Is the speaker Cable

normal?

Check the Speaker

Cable.

Yes

Page 22

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Only for training and service purposes

BLOCK DIAGRAM

Sound & Video Signal

Sound Signal

Video Signal Etc. Signal

HDMI4HDMI4

Y/C

UART1_RX

2.6V

COMM_UART_RX

3.3V

DEMUX

Common

CI_TS_DATA

FE_TS_DATA

TS_DATA

Buffer

UART0_TX UART1_TX

Int erf a c e

3.3 V

HDMI

Buffer

1.8 V

TMDS

DEMUX

UART0_RX

COMM_UART_TX

1.0V

TMDS

FE_TS_DATA

D/A

Tun e r

Syn th e si s

1.8V1.8V

3.3V3.3V

CEC

5V5V

LVDS

STi7101

MPEG Decoder

Buffer

SIF/ AM_AUDIO

DEBUG_UART_TX/ RX

I2S

CVBS,D TVL / RO UT

OUT

TV R/L

CVBS/Y/C,L /R

TU_MAIN

V, R/ L OUT

V/MNT

So un d

Proc essor

MSP4450K

DTV_CLK

RGB2 4Bit

Hsync, Vsync,D E

1.8V

2.5V

RGB2 4Bit

Hsync, Vsync,D E

FLI8548H -LF

(CORTEZ Plus)

3.3V

I2S

I2S_DTV

74LCX157

I2S_HDMI

Proc essor

Digital Video

RGB 24Bit

OUT

CXA2069Q

AV R/L

COMP Y/Pb/Pr

CEC

Hsync, Vsync, DE

AUDIO/ VIDEO

9V9V

COMP & PC R/L IN

MAIN V/Y/C OUT

SCART R/G/ B/FB

PC R/G/B, H/ V Sync

TMDS

3.3 V

HDMI_CLK

HDMI

1.8 V

PCR / LI N

SPDIF_OU T

(2 :1)

S/W

HDMI

TMDS

3.3V

I2S

3.3 V

Audio IC

NTP300A

18 V18 V

REC8

DTVO ut

SCART V, R/L IN

MNTO ut

TV_VOUT

AV1AV1

TV R/L OUT

PCA UD I OPCA UD I O

Pb Pr

COMP R/L IN

UART0_TX/ RX

DEBUG_UART_TX/ RX

Component

74LCX157

RX/TX

ICL3232

RX/TX

RGBRGB

SPDIFSPDIF

(3 :1)

HDMI1HDMI1

TMDS

RS-232RS-232

HDMI3HDMI3

HDMI2HDMI2

Page 23

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Only for training and service purposes

CORTEZ

Plus

SCL_EEPR/SDA_EEPR

IC701

24LC256

EEPROM

IC1400

CXA2069

IIC Line

MSTR0_SCL

MSTR0_SDA

SCL/SDA

IC1301

NTP300A

IC1300

MSP4450K

TU600

TUNER

(Analog)

IC702

M62320

IC1000

SIL9125

HDMI Receiver

SCL/SDA

VGA0_SCL

VGA0_SDA

STI7101

+3.3V

IC304

24LC256

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_5

SCL_5V/SDA_5V SCL_5V/SDA_5V

SW_TU_SCL/SW_TU_SDA

5V_TU

6.2K‰

TU600

TUNER

(DIGITAL)

MODULE

SCL/SDA

Page 24

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LGE Internal Use Only

EXPLODED VIEW

307

120

121

306

560

570

332

310

330

331

302

202

205

591

590

240

910

250

580

204

203

303

305

300

304

301

200

206

201

280

290

230

520

270

260

400

900

901

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts 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 as recommended 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

Page 25

Only for training and service purposes

Page 26

Only for training and service purposes

Page 27

Only for training and service purposes

Page 28

Only for training and service purposes

Page 29

July, 2008

Printed in KoreaP/NO : MFL41435502