LG 42PG1000 Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PD83A

MODEL : 42PG1000 42PG1000-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...................................................................................24

EXPLODED VIEW .................................................................................. 26

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 PD83A 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 ( 42”XGA )

Chassis

PD83A 42PG1000 Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland,

France,Germany,Greece,Hungary,Italy,Luxembourg,

Netherlands,Norway,Poland,Portugal,Rumania,Russia,Ser

bia,Slovenia,Spain,Sweden,Switzerland,UK

Model Name Market Brand Remark

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

No Item Specification Remark

42” Wide Color Display Module

16:9

PDP42XG,

RGB Closed Type, Film 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

42PG1000-ZA Safety : IEC/EN60065

EMI : EN55013

EMS : EN55020

Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland

,France,Germany,Greece,Hungary,Italy,Luxembourg,

Netherlands,Norway,Poland,Portugal,Rumania,Russia,

Serbia,Slovenia,Spain,Sweden,Switzerland,UK

Model ApplianceMarket 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

HDMI Input(3EA)

Audio Input (3EA)

No Item Specification Remark

Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland

,France,Germany,Greece,Hungary,Italy,Luxembourg,

Netherlands,Norway,Poland,Portugal,Rumania,Russia,

Serbia,Slovenia,Spain,Sweden,Switzerland,UK

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

Y/Cb/Cr, Y/Pb/Pr

RGB-PC

HDMI-DTV & SOUND

PC Audio, Component, AV

Analog Only

EU(PAL Marker)

4 System : PAL, SECAM,NTSC,PAL60

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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,

PD83A 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 15 minutes prior

to the adjustment. In case of keeping module is in the circumstance of 0°C, it should be placed in the circumstance of above 15°C for 2hours. In case of keeping module is in the circumstance of below

-20°C, it should be placed in the circumstance of above 15°C for 3hours.

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. ADC adjustment

5. Adjustment of RGB

5-1

. Auto RGB Gain / Offset Adjustment

(1)

Convert to PC in Input-source(refer to I2C command at page 10)

(2) Signal equipment displays

Output Voltage : 700 mVp-p Impress Resolution XGA(1024x768@60Hz)

Model : 60 in pattern Generator Pattern : 65 in pattern Generator(MSPG-925 Series)

[gray pattern that left & right is black and center is white

signal(Refer below picture)].

(3) Adjust by commanding AUTO_COLOR_ADJUST.

5-2. Confirmation

(1) We confirm whether “0xAA(RGB)” address of EEPROM

“0xA2” is “0xAA” or not.

(2) If “0xAA(RGB)” address of EEPROM “0xA2” isn’t “0xAA”,

we adjust once more.

(3) We can confirm the ADC values from “0xA4~0xA9(RGB)”

address in a page “0xA2”.

* Manual ADC process using Service Remocon. After enter

Service Mode by pushing “ADJ” key, execute “ADC Adjust” by pushing “

G“ key at “ADC CALIBRATION : RGB-C”.

* 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 Out

NO Item

Remark

CMD1 CMD2

Data 0

Transfer 18Byte

(Input resolution Data)

To check ADC Adjustment

on Assembly line

When transfer the ‘Mode

In’, Carry the command.

MSPG925FS

Component RGB-PCADC

Model : 60

(1024*768 60Hz)

Pattern : 65

Model : 209(480i 60Hz)

223(1080i 60Hz)

Pattern : 65

(Fig.1)

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Only for training and service purposes

6. Component input ADC

6-1

. Component Gain/Offset Adjustment

(1)

Convert to PC in Input-source(refer to I2C command at page 10)

(2) Signal equipment displays

1) Impress Resolution 480i

Model : 209 in pattern Generator(480i Mode) Pattern : 65 in pattern Generator(MSPG-925 Series)

2) Impress Resolution 1080i

Model : 223 in pattern Generator(1080i Mode) Pattern : 65 in pattern Generator(MSPG-925 Series)

6-2. Confirmation

(1) We confirm whether “0xB3(480i)/0xBC(1080i)” address

of EEPROM “0xA2” is “0xAA” or not.

(2) If “0xB3(480i)/0xBC(1080i)” address of EEPROM “0xA2”

isn’t “0xAA”, we adjust once more.

(3) We can confirm the ADC values from

“0xAD~0xB2(480i)/0xB6~BB(1080i)” address in a page

“0xA2”.

* Manual ADC process using Service Remocon. After enter

Service Mode by pushing “ADJ” key, execute “ADC Adjust” by pushing “

G“ key at “ADC CALIBRATION : RGB-C”.

7. POWER PCB Assy Voltage Adjustments (Va, Vs Voltage adjustments)

7-1. Test Equipment : D.M.M. 1EA

7-2.Connection Diagram for Measuring

: refer to Fig.3

7-3. 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 VR901, 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 VR951, voltage of D.M.M adjustment as same as Va voltage which on label of panel right/top. (Deviation; ±0.5V)

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

(Fig.2)

(Fig.3) 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) Connect the Set, EDID Download Jig, PC & Cable. (2) Turn on the PC & EDID Download Jig. Set up the S/W

option. (3) 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 three HDMI INPUT, you must download three 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 -> Changeable by total EDID data.

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 -> 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]

[1]

[2]

[3]

[4]

[5]

42PG1000

Product ID

Product IDModel Name

EDID table

739D

Hex

9D73

40307

42PG1000

Product ID

Product IDModel Name

EDID table

749D

Hex

9D74

40308

42PG1000

00 00 00 FC 00 34 32 50 7 31 30 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

42PG1000

00 00 00 FC 00 34 32 50 47 31 30 30 30 0A 20 20 20 20

Model Name Model Name(Hex)

2) HDMI_2.

=> Detail EDID Options are below([1],[2],[3],[4],[5]) * Please refer HDMI_1.

3) HDMI_3.

=> Detail EDID Options are below([1],[2],[3],[4],[5]) * Please refer HDMI_1.

9. Adjustment of White Balance

9-1. Required Equipment

(1) Remote control for adjustment. (2) Color Analyzer : CS-1000, CA-100,100+, CA210 or same

product.: CH 10 * Please adjust CA-210+, CA-100+ by before measuring. (3) Auto W/B adjustment instrument.(only for Auto adjustment) (4) AV Pattern Generator. (5) 15Pin D-Sub Jack(RGB) is connected to the AUTO W/B

EQUIPMENT.

9-2. AUTO White Balance Process

- Adjust Process will start by execute I2C Command(Inner

pattern (0xF3, 0xFF)).

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.

9-3. Manual W/B process

(using adjusts Remote control)

(1) After enter Service Mode by pushing “ADJ” key. (2) Enter White Pattern off of service mode, and change off ->

on.

(3) Enter “W/B ADJUST” by pushing “

G” key at “3. W/B

ADJUST”.

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Only for training and service purposes

[1]

[2]

[3]

[4]

[5]

[1]

[2]

[3]

[4]

[5]

* Before 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

0.293

0.329

11,000K

9,300K

6,500K

0.000

0.003

0.276

0.285

0.313

COOL

MEDIUM

WARM

CSM Temp uv

+ 21 hidden pages