LG 42PG6500 Schematic

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

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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

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

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)

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]

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