LG 50PQ60D-AA Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PA91A

MODEL : 50PQ60D 50PQ60D-AA

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

Internal Use Only

- 2 -

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

CONTENTS

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

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

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

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

BLOCK DIAGRAM ...................................................................................................................10

EXPLODED VIEW ....................................................................................................................11

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

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

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LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

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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LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

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 42”/50” PDP TV used PA91A 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 : CB specification
EMC : CISPR 13 specification

V Module Specification

(1) 50”

Chassis

PA91A 50PQ60D-AA

42PQ60D-AA
50PQ20D-AA
42PQ20D-AA

Australia LG

Model Name Market Brand Remark

Model Name
50PQ60D-AA
42PQ60D-AA
50PQ20D-AA
42PQ20D-AA

Remark

Safety : IEC60065,

EN60065

EMC : CISPR 13 Class B

Market

Australia

Appliance

TEST

Display Screen Device
Aspect Ratio
PDP Module

Operating Environment

Storage Environment

Input Voltage

1
2
3

4

5

6

No Item Specification Remark

50 inch wide Color Display Module
16:9
PDP50XG2####,
RGB Closed Type

1) Temp. : 0 ~ 40deg

2) Humidity : 20 ~ 80%

3) Temp. : -20 ~ 60deg

4) Humidity : 10 ~ 90%
AC100-240V~, 50/60Hz

PDP

LGE SPEC.

Maker: LG

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LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

(2) 42”

V Model General Specification

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

1
2
3

4

5

6

No Item Specification Remark

42 inch wide Color Display Module
16:9
PDP42XG2####,
RGB Closed Type

1) Temp. : 0 ~ 40deg

2) Humidity : 20 ~ 80%

3) Temp. : -20 ~ 60deg

4) Humidity : 10 ~ 90%
AC100-240V~, 50/60Hz

PDP

LGE SPEC.

Maker: LG

Market
Broadcasting system

Receiving system

Video Input (1EA)
S-Video Input (1EA)
Component Input (2EA)
RGB Input(1EA)
HDMI Input(3EA)
Audio Input (5EA)

Audio Out(1EA)
USB(1EA)

1
2

3

4
5
6
7
8
9

10
11

No Item Specification Remark

Australia

1) PAL-BG

2) DVB T
Analog : Upper Heterodyne
Digital : COFDM
PAL, NTSC
PAL, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component(2EA), AV(2EA)

SPDIF(1EA)
Divx, MP3, JPEG

L/R Input(PC 1EA, SIDE AV 1EA,
Component 2EA, Rear AV 1EA)

DIVX, MP3, JPEG ONLY FOR PQ60

- 6 -

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This spec sheet is applied all of the PDP TV, PA91A 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,.

O After RGB Full White in HEAT-RUN Mode, the receiver

must be operated prior to the 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 (WHITE) of HEAT RUN MODE uses to

check panel.

Caution: If you turn on a still screen more than 20 minutes

(Especially digital pattern, cross hatch pattern), an
after image may be occur in the black level part of the
screen.

Caution: Using ‘power on’ button of the control R/C, power on

TV.

O Auto-control adjustment protocol(RS-232C)

3. Insert Tool OPTION and Model
Name Download

(1) Press IN_START key on R/C to insert Tool OPTION
(2) On the “Tool Option 1”, Insert Tool Option by a number

key

(3) Press the ENTER(

V)

(4) Press ENTER(

V) again.

(5) Select “OK to Download” by using

F/G(VOL +/-) and press

G(VOL +)

- 7 -

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

4. EDID(The Extended Display
Identification Data) Download

(1) Press the ADJ KEY on R/C and enter EZ ADJUST.
(2) Select “5.EDID D/L” by using

D/E(CH +/-) and press

ENTER(

V).

(3) Select “Start” and press navigation key(

G).

(4) EDID download is executed automatically.
(5) Press EXIT key on R/C

(6) EDID DATA

1) Analog RGB

O Detail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ)

ⓐ Product ID

ⓑ Week, Year

=> Controlled on production line:

ex) Week: ‘03’ -> ‘03’

Year: ‘2006’ -> ‘10’

ⓒ Model Name(Hex)

ⓓ Checksum: Changeable by total EDID data.

2) HDMI

O Detail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)

ⓐ Product ID

ⓑ Week, Year

=> Controlled on production line:

ex) Week: ‘03’ -> ‘03’

Year: ‘2006’ -> ‘10’

ⓒ Model Name(Hex)

ⓓ Checksum: Changeable by total EDID data.

ⓔ Vender ID

- 8 -

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

5. ADC Adjustment

5-1. Adjustment of RGB

Auto RGB Gain/Offset Adjustment

(1) Convert to PC in Input-source.
(2) Signal equipment displays

Output Voltage: 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 65 in Pattern Generator (MSPG-925 SERISE)

3) Adjust by commanding AUTO_COLOR_ADJUST

5-2. Adjustment of COMPONENT

Component Gain/Offset Adjustment

(1) Convert to Component in Input-source.
(2) Signal equipment displays

Impress Resolution 480i
MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator(MSPG-925 SERISE)

Impress Resolution 1080i
MODEL: 223 in Pattern Generator(1080i Mode)
PATTERN: 65 in Pattern Generator(MSPG-925 SERISE)

5-3. Confirmation

Press ‘InStart’ Key on Factory SVC Remote Controller, It is
possible to check ADC & EDID ADJ

Caution: Each PCB assembly must be checked by check JIG

set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)

6. POWER PCB Assembly Voltage
Adjustment

(Va, Vs voltage Adjustment)

6-1. Test Equipment:D.M.M 1EA
6-2. Connection Diagram for Measuring:

Refer to fig.1

6-3. Adjustment Method

(1) Va adjustment

1) Connect + terminal of D. M.M. to Va pin of P811, connect ­terminal to GND pin of P811.

2) 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) Connect + terminal of D. M..M. to Vs pin of P811, connect

-terminal to GND pin of P811.

2) After turning VR951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)

7. Download Serial Number (RS-232C)

(1) Press “Power on” key of service R/C.(Baud rate : 115200

bps)

(2) Connect RS232 Signal Cable to RS-232 Jack.
(3) Write Serial number by use RS-232.
(4) Must check the serial number at the Diagnostics of SET

UP menu.
(Refer to below ‘6.SET INFORMATION’).

- 9 -

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

8. Adjustment of White Balance

8-1. Required Equipment

(1) Remote controller for adjustment
(2) Color Analyzer (CS-1000, CA-100,100+,CA-210 or same

product) : CH 10 (PDP)

[ Please adjust CA-210, CA-100+ by CS-1000 before

measuring

(3) Auto W/B adjustment instrument(only for Auto adjustment)
(4) 9 Pin D-Sub Jack(RS232C) is connected to the AUTO W/B

EQUIPMENT.

8-2. AUTO White Balance Process

Before Adjust of White Balance, Please press POWER ONLY
key
Adjust Process will start by execute RS232C Command

O Color temperature standards according to CSM and Module

O CS-1000/CA-100+/CA-210(CH 10) White balance

adjustment coordinates and color temperature.

8-3. Manual W/B Process (using adjusts Remote control)

Please Adjust in AV 1 MODE, Turn off Energy Saving Mode.

(1) Enter “PICTURE RESET” on Picture Mode, then turn off

Fresh Contrast and Fresh colour in Advanced Control
(2) After enter Service Mode by pushing “ADJ” key,
(3) Enter White Pattern off of service mode, and change off ->

on.
(4) Enter “W/B ADJUST” by pushing “

G” key at “3. W/B

ADJUST”.
(5) Adjust W/B DATA, for all CSM, choose ‘COPY ALL’

[ Gain Max Value is 192. So, Never make any Gain Value

over 192 and please fix one Value on 192, between R, G
and B.

8-4.

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 aging start, keep the Power on (no suspension of
power supply) and heat-run over 5 minutes

8-5.

Auto Adjustment Map(RS232C)

9. Checking the EYE-Q Operation

(1) Press the EYE Key on the adjustment remote controller.
(2) Check the Sensor DATA (It must be under 10) and keep

the data longer than 1.5s

(3) Check ‘OK’

(Sensor DATA 0 ~ 4095, Power Saving Mode 0 ~ 12)

[ IF you press IN-STAP Button, change Green Eye-check OSD.

PLASMA Remark

11000K

9300K
6500K

Cool

Medium

Warm

CSM

Color Coordinate

xy

0.283

0.293

0.329

11,000K

9,300K
6,500K

0.002

0.002

0.002

0.276

0.285

0.313

Cool

Medium

Warm

CSM Temp

±Color

Coordinate

Only for training and service purposes

- 10 -

BLOCK DIAGRAM

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

400

602

200

580

A2

LV1

240

603

A10

900

501

590

250

520

601

901

305

301

300

120

121

304

302

303

570

540

561

310

330

560

208

201

204

205

202

207

203

206

- 11 -

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

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

MAIN(TOP)

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Only for training and service purposes

MAIN(BOTTOM)

LGE Internal Use OnlyCopyright©2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

LED(TOP) LED(BOTTOM)

CONTROL(TOP) CONTROL(BOTTOM)

Feb., 2009

Printed in KoreaP/NO : MFL60969501