LG 42PQ301R Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PP91B

MODEL : 42PQ301R 42PQ301R-ZB

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

Internal Use Only

P/NO : MFL60273009 (0906-REV00) Printed in Korea

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Only for training and service purposes

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ..................................................................................................8

BLOCK DIAGRAM ...................................................................................................................16

EXPLODED VIEW ..................................................................................................................17

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

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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 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.

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 PDP TV used PP91A/B/C/D 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

Remark Safety: IEC/EN60065, EMI: EN55013, EMS: EN55020 Safety: IEC/EN60065, EMI: CISPR13

Market

NON-EU Central and South America

Appliance

TEST

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Only for training and service purposes

V Module Specification

(1) 42” XGA

(2) 50” WXGA

(3) 50” FHD

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

No Item Specification Remark

50 inch 16:9 Color plasma Display Module

16:9

PDP50G2####,

RGB Closed(Well) Type

1) Temp. : 0 ~ 55deg

2) Humidity : 20 ~ 80%

3) Temp. : -10 ~ 60deg

4) Humidity : 10 ~ 90%

AC100-240V~, 50/60Hz

PDP

Glass Filter

LGE SPEC.

Maker: LGIT

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

No Item Specification Remark

50 inch 16:9 Color plasma Display Module

16:9

PDP50H3####,

RGB Closed Type

1) Temp. : 0 ~ 55deg

2) Humidity : 20 ~ 80%

3) Temp. : -10 ~ 60deg

4) Humidity : 10 ~ 90%

AC100-240V~, 50/60Hz

PDP

Glass Filter

LGE SPEC.

Maker: LGIT

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

No Item Specification Remark

42 inch 16:9 Color plasma Display Module

16:9

PDP42G2####,

RGB Closed Type

1) Temp. : 0 ~ 60deg

2) Humidity : 20 ~ 80%

3) Temp. : -20 ~ 60deg

4) Humidity : 10 ~ 90%

AC100-240V~, 50/60Hz

PDP

Glass Filter

LGE SPEC.

Maker: LGIT

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Only for training and service purposes

V Model General Specification

(1) EU Spec.(ZA)

(2) NON-EU Spec.(TA)

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Only for training and service purposes

(3) Central and South America(MA)

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Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This spec sheet is applied to all of the PP91A/B chassis.

2. Specification

(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 when module is in the circumstance of over

15°

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

- 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 3 hours,.

3. S/W Program Download

3-1. Profile

This is for downloading the s/w to the flash memory of the IC603

3-2. Equipment

(1) PC (2) ISP_tool program (3) Download jig

3-3. Connection Structure

3-4. Connection Condition

(1) IC name and circuit number : Flash Memory and IC603 (2) Use voltage : 3.3V (5 pin) (3) SCL : 15 pin (4) SDA : 12 pin (5) Tact time : about 2min and 30seconds

3-5. Download Method (By using MSTAR JIG)

(1) Preliminary Steps

1) Connect the download jig to D-sub jack

2) Connect the PC to USB jack

(2) Download Steps

1) Execute ‘ISP Tool’ program in PC, then a main window will be opened

Double click

2) Click the connect button and confirm “Dialog Box”.

3) Click the Config button and Change speed E2PROM Device setting : over the 350Khz

4) Read and write bin file Click “(1)Read” tab, and then load download file(XXXX.bin) by clicking “Read”.

5) Click “Auto(2)” tab and set as below

6) Click “Run(3)”.

7) After downloading, check “OK(4)” message.

3-6. Download Method (By using USB

Memory Stick)

[Caution]

- Using ‘power on’ button of the control R/C, power on TV.

- USB file (EPK) version must be bigger than downloaded version of main B/D.

(1) Using ‘Power ON’ button of the control R/C, Power on TV. (2) Insert the USB memory stick to the SET. (3) Display USB loding message then, push the ‘Exit’ Key of

control R/C

(4) Push the ‘MENU’ Key and move the cusor ‘OPTION’ of

OSD ( Fig. 1) * Caution: Don’t push the ‘OK’ key.Just cusor is on the

‘OPTION’ menu.

(5) Push the “7” key of control R/C continuously.

Then, Display “TV Software Update” Pop-up menu. (Fig. 2)

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Only for training and service purposes

( Fig. 1)

( Fig. 2)

(6) Select SW file (XXXX.bin) you want, push the “OK” Key. (7) S/W download process is excuted automatically.

4. PCB Assembly Adjustment Method

4-1. Option Adjustment Following BOM

Tool Option Area Option Option 1 Option 2 Option 3(Available for EU & Non EU model)

* Profile: Must be changed the option value because being

different with some setting value depend on module, inch and market

* Equipment : Adjustment Remote Controller

(1) Push the IN-START key in the Adjust R/C. (2) Enter Password number. The value of Password is “0 0 0

0”.

(3) Input the Option Number that was specified in the BOM,

into the Shipping area.

(4) Select “Tool Option/ Area Option” by using

D/E(CH+/-)

key, and press the number key(0~9) consecutively ex) If the value of Tool Option1 is 4, input the data using

number key “4” (Fig. 3)

Caution: Don’t Push “IN-STOP” key after PCB assembly

adjustment.

(5) EDID D/L Method

After software D/L or PCBA manufacturing, you can download EDID Data. When you adjust Tool Option, H6 Model EDID download process is executed automatically

* If the model don’t have HDMI 3, HDMI 3 will be disappeared

at OSD Window.

Caution: When you adjust tool option, don’t connect HDMI or D-

sub cable. If you connect some cable, EDID D/L process will be failed.

(6) Adjustment method

Before PCBA check, have to change the Tool option and Area option

[ About PDP

After done all adjustments, Press IN-START button and compare Tool option and Area option value with its BOM, if it is correctly same then Change “RF mode” and then unplug the AC cable. If it is not same, then correct it same with BOM and unplug AC cable. For correct it to the model’s module from factory JIG model.

[ Don’t push The IN-STOP KEY after completing the function

inspection.

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Only for training and service purposes

3.09

. .

MODEL : XXXXXX Module : XXXX S/W Ver. : X.XX ROM : XXXXXXX UTT X Temp : xxxxx : Celsius ADC CAL. RGB : OK Component SD OK Component HD OK EDID RGB(OK) HDMI1(NG) HDMI2(NG) HDMI3(NG)

Tool Option  4 Area Option  40 Option 1 17 Option 2 40

. .

MODEL : XXXXXX Module : XXXX S/W Ver. : X.XX ROM : XXXXXXX UTT X Temp : xxxxx : Celsius ADC CAL. RGB : OK Component SD OK Component HD OK EDID RGB(OK) HDMI1(OK) HDMI2(OK) HDMI3(OK)

Tool Option  4 Area Option  40 Option 1 17 Option 2 40

( Fig. 3)

5. EDID(The Extended Display Identification Data)

Originally H6(PP91A/B) Model EDID download process is executed when you adjust Tool Option.

[ Caution

- Use the proper signal cable for EDID Download

- Never connect HDMI & D-SUB Cable at the same time.

- Use the proper cables below for EDID Writing

5-1. Profile: To be possible for plug and play

5-2. 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.

5-3. Connection Structure

Caution: Never connect HDMI & D-SUB Cable at the same time.

5-4. EDID Data

O WXGA EDID DATA(50inch)

<Analog(RGB) : 128bytes>

<HDMI 3 : 256bytes> SIDE HDMI(HDMI 3) is adjusted above

60Tool model

O XGA EDID DATA(42inch)

<Analog(RGB) : 128bytes>

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Only for training and service purposes

Connection Diagram of EDID

<HDMI 3 : 256bytes> SIDE HDMI(HDMI 3) is adjusted above

60Tool model

6. HDCP(High-Bandwidth Digital Contents Protection) Download

HDCP download process is deleted in H6 models In H6 models, it is usimg the EEPROM masking HDCP Key

7. Manual ADC Adjustment (Component 1, RGB)

[Caution]

- Do not connect external input cable

- Adjustment result is applied to SET On/Off later.

* Adjustment is done using internal ADC, so input signal is not

necessary.

7-1. COMPONENT ADC (SD / HD)

(1) Convert to Component1 input source. (2) Press ADJ key on R/C for adjustment. (3) Enter Password number. The value of Password is “0 0 0

0”.

(4) Select “0. ADC calibration” by using

D/E(CH +/-) and press

ENTER(

V).

(5) Start ADC adjustment by using

F/G (VOL +/-) or press

ENTER(

V).

(6) ADC adjustment is executed automatically .

When ADC adjustment is finished, this OSD appear.

7-2. RGB input ADC

Auto RGB Gain/Offset Adjustment

(1) Convert to PC in Input-source (2) Press ADJ key on R/C for adjustment. (3) Enter Password number. The value of Password is “0 0 0

0”.

(4) Select “0. ADC calibration” by using

D/E(CH +/-) and press

ENTER(

V).

(5) Start ADC adjustment by using

F/G (VOL +/-) or press

ENTER(

V).

(6) ADC adjustment is executed automatically .

When ADC adjustment is finished, this OSD appear.

Notice : After All mode check, set the Speaker Volume “0”.

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Only for training and service purposes

RF input

NO SIGNAL or White noise

AV / Component / RGB input

NO SIGNAL

Notice : From this sentence, All working is mass production.

8. POWER PCB Assy Voltage Adjustment

(Vs voltage Adjustment)

8-1. Test Equipment: D.M.M 1EA

8-2. Connection Diagram for Measuring

Refer to (Fig. 4)

8-3. Adjustment Method

(1) Vs Adjustment

1) Connect + terminal of D. M..M. to Vs pin of P702, connect -terminal to GND pin of P702.

2) After turning VR901, voltage of D.M.M adjustment as same as Vs voltage which on label of panel right/top ( deviation ; ±0.5V)

9. Adjustment of White Balance

9-1. Purpose and Principle for Adjustment

of the Color Temperature

(1) Purpose: Adjust the color temperature to reduce the

deviation of the module color temperature.

(2) Principle : To adjust the white balance without the

saturation, Fix the one of R/G/B gain to C0 and decrease the others.

(3) Adjustment mode: Two modes of Cool, Warm and Medium

9-2. Required Equipment

(1) Remote controller for adjustment (2) Color Analyzer : CA-100+ or CA-210 or same product

- PLASMA TV(ch : 10)

(3) Auto W/B adjustment instrument(only for Auto adjustment)

- Do the white balance adjustment under the 10LUX

[ Notice: When using the Color Analyzer with PDP,

recommend the CA-100 more than CA-210. If CA-100 can not available, it is also good to use the CA-210.

(4) PC (for communication through RGB) (5) Pattern Generator (MSPG-925FA etc.)

-Before white balance, press the ADJ key and select third row like (Fig. 5)

-To enter White-balance mode, Enter Password Number “0 0 0 0” and select third row.

[ Caution: System control Host should be “DDC” for adjustment.

(6) Adjust W/B DATA, for all CSM, choose ‘COPY ALL’

9-3. Connecting Diagram of Equipment for

Measuring

(For Automatic Adjustment)

(Method 2, using RS-232C, You connect RS-232C Cable)

(1) Enter the adjustment mode of the white balance

- Enter the white balance adjustment mode at the same time heat-run mode when pushing the power on by power only key

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Only for training and service purposes

P811

Vs ADJ VR901

(Fig. 4)

EZ ADJUST

0. ADC CALIBRATION : TV

1. ADC ADJUST

2. SUB B/C ADJUST

3. W/B ADJUST

4. WHITE PATTERN : OFF

5. EDID D/L

(Fig. 5)

3. W/B ADJUST

Mode : TV

TEMPERATURE : Medium R-Gain. : 192 G-Gain. : 192 B-Gain. : 192

R-Offset : 128 G-Offset : 128 B-Offset : 128

COPY ALL

(Fig. 6)

Method 2-(RS-232C)

- Maintain the white balance adjustment mode with same condition of Heat-run

- Maintain after AC off/on in status of Heat-run pattern display

(2) Release the white balance adjustment mode

- Release the adjust mode after AC off/on or std-by off/on in status of finishing the Hear-run mode

- Release the Adjust mode when receiving the aging off command(F3 00 00) from adjustment equipment)

(3) Enter the adjust mode of white balance

- Enter the white balance adjustment mode with aging command(F3, 00, FF)

9-4. Adjustment of White Balance for

Manual Adjustment

(method 3) Adjustment mode: Three modes of Cool, Medium(Vivid) and Warm

- Equipment : 1) Color analyzer(CA100+, CA210) should be

used in the calibrated ch by CS-1000(PDP : CH10)

2) Adjustment remocon

- For manual adjustment, it is also possible by the following

sequence. Operate the zero-calibration of the CA-100+ or CA-210, then stick sensor to the module when adjusting.

(1) Select white pattern of heat-run by pressing “POWER ON”

key on remote control for adjustment then operate heat run longer than 5 minutes. (recommend) (If not executed this step, the condition for W/B will be different)

(2) Changing to the AV mode by remote control.(Push front-

AV) (3) Input external pattern(85% white pattern). (4) Stick sensor to center of the screen and select each items

(Red/Green/Blue Gain and Offset) using

D/E(CH +/-) key

on R/C.. (5) Adjust R/ G/ B Gain using

F/G(VOL +/-) key on R/C.

(6) Adjust three modes of Cool, Medium(Vivid) and Warm as

below figure.

(Fix the one of R/G/B and change the others)

- Push the “VOL + “ key : Cool, Medium, Warm

[

Refer to the below case to know what value is fixed.

[CASE] First adjust the coordinate much away from the target value(x, y).

1. x, y > target

1) Decrease the R, G.

2. x, y < target

1) First decrease the B gain,

2) Decrease the one of the others.

- In case of decreasing the x, decreasing the R : fix G

- In case of decreasing the y , decreasing the G : fix R

3. x > target , y < target

1) First decrease B, so make y a little more than the target.

2) Adjust x value by decreasing the R

4. x < target , y > target

1) First decrease B, so make x a little more than the target.

2) Adjust x value by decreasing the G

(7) When adjustment is completed, Exit adjustment mode

using EXIT key on R/C.

9-5. Connecting diagram of Equipment for

Measuring

(For Automatic Adjustment)

(method 1, using IIC, You connect RGB Cable)

(1) Enter the adjustment mode of the white balance

- Enter the white balance adjustment mode at the same time heat-run mode when pushing the power on by power only key

- Maintain the white balance adjustment mode with same condition of Heat-run

- Maintain after AC off/on in status of Heat-run pattern display

(2) Release the white balance adjustment mode

- Release the adjust mode after AC off/on or std-by off/on in status of finishing the Hear-run mode

- push the “power on” key(IIC Mode) on Adjust remotecontroller.

- Release the Adjust mode when receiving the aging off command(F3 00 00) from adjustment equipment)

(3) Enter the adjust mode of white balance

- Enter the white balance adjustment mode with aging command(F3, 00, FF)

O Color Temperature & Color Coordinates Setting

- When adjusting the Color Temperature, Color Analyzer CA210(Matrix should be corrected through CH10 of CS-1000) should be used. When CA-210 have used, it don’t need to fit the CH10.

- Adjust the Color Temperature based below adjustment color coordinates.

O Target Value CA-210(LCD : CH 9, PDP : CH10), CA-100(PDP)

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Only for training and service purposes

+0.0036,500K

Warm

+0.0009,300K

Medium

+0.00011,000K

Cool 0.276±0.002

0.285±0.002 0.293±0.002

0.329±0.002

0.313±0.002

0.283±0.002

uvTemp

Color coordinate

Mode

Method 1-(I2C)

(Standard color coordinate and temperature when using the CA-100+ or CA210 equipment)

O Above optical characteristics are should be measured by

following condition.

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Only for training and service purposes

+0.0036,500K

Warm

+0.0009,300K

Medium

+0.00011,000K

Cool 0.276±0.002

0.285±0.002 0.293±0.002

0.329±0.002

0.313±0.002

0.283±0.002

uvTemp

Color coordinate

Mode

O DDC Adjustment Command Set

[ R/G/B GAIN max value : C0

Adjustment

- 16 -

Only for training and service purposes

BLOCK DIAGRAM

A10

900

901

400

520

590

240

250

300

305

301

303

560

310

330

302

200

120

580

260

270

603

602

601

501

570

LV1

201

203

205

204

206

202

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LGE Internal Use Only

EXPLODED VIEW

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

LGE Internal Use Only

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