LG 42PQ200R Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PP91B

MODEL : 42PQ200R 42PQ200R-ZA

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania 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..................................................................................................8

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

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

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 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 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

Chassis

PP91A/B 50PQ30R-MA

50PQ60R-TA 42PQ600R-ZA 42PQ200R-ZA 50PQ200R-ZA 42PQ70BR-TA

42PQ60R-MA

42PQ30R-TA

Central and South America

NON-EU

EU EU EU

NON-EU

Central and South America

NON-EU

Model Name Market Brand Remark

Model Name 42PQ600R-ZA 42PQ200R-ZA 50PQ200R-ZA

50PQ60R-TA

42PQ70BR-TA

42PQ30R-TA 50PQ30R-MA 42PQ60R-MA

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

1 2 3

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

1 2 3

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

1 2 3

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)

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