LG DU-50PZ60X Service Manual

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : AF-03BA

MODEL : DU-50PZ60/H

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

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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 lsolation 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 circuitary 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 positioin, 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 esposed 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 sepcified, 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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DESCRIPTION OF CONTROLS...........................................4

SPECIFICATIONS.................................................................7

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

PRINTED CIRCUIT BOARD ...............................................11

BLOCK DIAGRAM...............................................................17

EXPLODED VIEW...............................................................18

EXPLODED VIEW PARTS LIST.........................................19

REPLACEMENT PARTS LIST............................................20

SCHEMATIC DIAGRAM..........................................................

TABLE OF CONTENTS

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Controls

TV/VIDEO

ON/OFF

S-VIDEO

A/V INPUT 2

VIDEO

AUDIO

L/MONO

MENU VOL

TV/VIDEO MENU VOL CH

ON/OFF S-VIDEO VIDEO AUDIO

L/MONO

A/V INPUT 2

Power Button

S-VIDEO Input

A connection available to provide better picture quality than the video input.

VIDEO Input

Connects the video signal from a video device.

AUDIO Input

Use to connect to hear stereo sound from an external device.

TV/VIDEO Button

VOLUME (

FF,GG

) Buttons

Power Standby Indicator

Illuminates red in standby mode, Illuminates green when the TV is turned on.

- This is a simplified representation of front panel. Here shown may be somewhat different from your TV.

Remote Control Sensor

CHANNEL (EE, DD) Buttons

MENU Button

Front Panel Controls

DESCRIPTION OF CONTROLS

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Connection Options

RGB INPUT

Antenna1 Antenna 2

AUDIO INPUT

DVI INPUT

S-VIDEO

REMOTE

CONTROL

AC INPUT

EXTERNAL SPEAKER

AUDIO INPUT

AUDIO VIDEO

VIDEO INPUT

DIGITAL AUDIO

(OPTICAL)

COMPONENT 2

MONITOR OUTPUT

A/V

INPUT1

(MONO)

DVD /DTV INPUT

COMPONENT 1

DVI

INPUT

R L R L

COMPONENT1 INPUT

OUTPUT

RS-232C INPUT

(CONTROL/SERVICE)

Back Connection Panel

Antenna 1-2 Inputs

Connect cable or antenna signals to the TV, either directly or through your cable box. For DTV use Antenna 2 only.

RGB Input/Audio Input/DVI Input

Connect the monitor output connector from a PC to the appropriate input port.

Digital Audio (DVI: Digital Visual

Interface/Component1) Input/

Digital Audio Output

Connect digital audio from various types

of equipment. Note: In standby mode,

these ports will not work.

Audio/Video Input 1

Connect audio/video output from an

external device to these jacks.

DVD/DTV Input (Component 1-2)

Connect a component video/audio device to these jacks.

Monitor Output

Connect a second TV or

Monitor.

Remote Control Port

Connect your wired remote control here.

S-Video Input

Connect S-Video out from an S-VIDEO device to the S-VIDEO input.

External Speaker (8 ohm Output)

Connect to optional external speaker(s).

* For further information, refer to ‘Speaker &

Speaker Stand’ manual.

Power Cord Socket

This TV operates on an AC power. The voltage is indi-

cated on the Specifications page. Never attempt to oper-

ate the TV on DC power.

- This manual explains the features available on the DU-50PZ60/70 series TVs.

DESCRIPTION OF CONTROLS

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DESCRIPTION OF CONTROLS

- When using the remote control, aim it at the remote control sensor on the TV.

LIGHT

TV/VIDEO

MODE

COMP/RGB/DVI

MUTE

SURF

VOL CH

INFO

SAP

RATIO

SOUND VIDEO

EXIT

PLAY PAUSE STOP RECORD

PIP PIPCH- PIPCH+ PIPINPUT

FREEZE

ADJUST

ZOOM SIGNAL SWAP

REW FF SKIP

POWER

TIMER

FLASHBK

LIGHT

Illuminates the remote control buttons.

TV/VIDEO

Selects: DTV, Analog, Video1-2,

Component 1-2, RGB-DTV (or RGB-PC),

DVI-DTV (or DVI-PC) input sources.

COMP/RGB/DVI

Selects: Component 1-2, RGB-DTV (or RGB-

PC), DVI-DTV (or DVI-PC) input sources.

NUMBER buttons

DASH

Used to enter a program number for multiple

program channels such as 2—1,2—2,etc.

MUTE

Switches the sound on or off.

VCR/DVD BUTTONS

Control some video cassette recorders or DVD player ("RECORD" button is not available for DVD player).

RATIO

Changes the aspect ratio.

MODE

Selects the remote operating mode: TV, VCR, DVD, CABLE, HDSTB or AUDIO. Select other operating modes, for the remote to operate external devices.

POWER

Turns your TV or any other programmed equipment on or off, depending on mode.

TIMER

Lets you select the amount of time before your TV turns itself off automatically.

SURF

Use to scroll the Surf channel list.

Select a closed caption: Off, EZ Mute, and On.

FLASHBK

Tunes to the last channel viewed.

THUMBSTICK (Up/Down/Left/Right/OK)

Allows you to navigate the on-screen

menus and adjust the system settings to

your preference.

CHANNEL UP/DOWN

Selects available channels found with EZ scan.

EXIT

Clears all on-screen displays and returns to TV viewing from any menu.

VIDEO

Adjusts the factory preset picture according to the room.

VOLUME UP/DOWN

Increases/decreases the sound level.

SAP

Selects MTS sound: Mono, Stereo, and SAP.

Change the audio language in DTV mode.

Brings up the main menu to the screen.

INFO

When you watch the TV, displays information

on top of the screen. Not available in

Component 1-2, RGB and DVI mode.

SOUND

Selects the sound appropriate

for the program's character.

PIP

Switches between PIP, POP (Picture-out-ofPicture) and Twin picture modes.

PIPCH-/PIPCH+

Changes to next higher/lower PIP channel.

PIP INPUT

Selects the input source for the sub picture.

SWAP

Exchanges the PIP/main images.

FREEZE

Freezes the currently-viewed picture. Main

picture is frozen in PIP/Twin picturre mode.

ADJUST

Adjusts screen position, clock, and

phase in PC mode.

ZOOM

Enlarges the main picture size.

SIGNAL

Displays the digital signal strength.

Remote Control Key Functions

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• The specifications shown above may be changed without prior notice for quality improvement.

MODELS

AC120V, 60Hz

NTSC-M, ATSC

VHF 2 ~ 13, UHF 14 ~ 69, CATV 1 ~ 125, CADTV 1 ~ 135

75 Ω

1024 x 768 (Dot) 1366 x 768 (Dot)

16,770,000 (256 steps of each R, G and B)

32 ~ 104°F (0 ~ 40°C)

Less than 80%

41 / 1040

26.3 / 668

3.7 / 95 75 / 34

41 / 1040

26.4 / 669.4

3.7 / 95 75 / 34

48.2 / 1225

30.6 / 778

3.85 / 98

101.2 / 45.9

48.3 / 1226.2

30.6 / 778

3.9 / 99

98.1 / 44.5

Width (inches / mm)

Height (inches / mm)

Depth (inches / mm)

Weight (pounds / kg)

Power requirement

Television System

Program Coverage

External Antenna Impedance

Resolution

Color

Operating Temperature Range

Operating Humidity Range

DU-42PZ60/42PZ60A

/42PZ60B/42PZ60C /42PZ60H/42PZ60K /42PZ60R/42PZ60S

DU-50PZ60/50PZ60A

/50PZ60B/50PZ60C /50PZ60H/50PZ60K /50PZ60R/50PZ60S

DU-42PZ70/42PZ70A

/42PZ70B/42PZ70C /42PZ70H/42PZ70K /42PZ70R/42PZ70S

DU-50PZ70/50PZ70A

/50PZ70B/50PZ70C /50PZ70H/50PZ70K /50PZ70R/50PZ70S

SPECIFICATIONS

1. Application Object

These instructions are applied to all of the PDP TV, AF-03BA.

2. Notes

(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 in adjusting.

(5) The receiver must be operated for about 15 minutes prior

to the adjustment.

1) After receiving 100% white pattern(06CH), the receiver must be operate prior to adjustment. (Or 3. White Pattern condition in EZ - Adjust)

2) Enter into White Pattern

- Enter the Ez - Adjust by pressing ADJ Key on R/C for

adjustment.

- Select the 3. White Pattern using CH +/- Key and

press the Enter(

Y) Key.

Display the 100% Full White Pattern.

[ Set is activated HEAT-RUN without signal generator in

this mode.

If you turn on a still screen more than 20 minutes (Especially Digital pattern(13 CH), Cross Hatch Pattern), a afterimage may be occur in the black level part of the screen.

3. EPLD Download

(1) Test Equipment: Jig for PC, download (2) Connect the power of VSC B/D. (3) Execute download program(Flash Loader) of PC. (4) After executing execution hot key (Programmer), icon click (5) End after confirming

Each PCB Assy must be checked by Check JIG Set before assembly. (Especially, be careful Power PCB Assy which can cause fatal Damage to PDP Module.)

4. POWER PCB Assy Voltage Adjustment

(Va, Vs Voltage Adjustment)

4-1 Test Equipment :D.M.M 1EA 4-2 Connection Diagram for Measuring

Refer to Fig 2.

4-3 Adjustment Method

(1) Va Adjustment

1) Connect + terminal of D.M.M to Va pin of P805 and connect – terminal to GND pin of P805.

2) After turning the RV601, 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 P805 and connect – terminal to GND pin of P805.

2) After turning the RV401, voltage of D.M.M adjustment as same as Vs voltage which on label of panel Right/Top. (Deviation : ±0.5V)

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ADJUSTMENT INSTRUCTIONS

VSC

B/D

<Fig 1> Connection Diagram of EPLD Download

<Fig 2> Connection Diagram of Power Adjustment for Measuring

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5. AD9883A-Set Adjustment

5-1 Synopsis

AD9883A-Set adjustment to set the black level and the Gain of optimum with an automatic movement from the analog => digital converter and RGB revises a deviation a function for it is.

5-2 Test Equipment

R/C for adjustment, 801GF(802B, 802F, 802R) Pattern Generator (720P The Vertical 100% Color Bar Pattern output will be possible and the output level will accurately have to be revised with 0.7±0.1Vp-p)

5-3 Adjustment

(1) Input the 100% Vertical Color Bar Pattern(TVBAR_100) of

720P Mode possible Component input support, select the Component1 or Component2 an input selection and select the Clear image.

(2) After signal receiving above 1 second, press the ADJ Key

on R/C for adjustment enter the ‘Ez - Adjust’ and select the ‘5. AD9883A-Set’. Pressing the + Key adjust with automatic movement.

(3) When the adjustment is over in the normality and the

message which is a ‘AD9883 - Set’ becomes the display and the case which has not become the normality the message which is a ‘AD9883A set error’ becomes the display.

(4) Readjust after confirming the case Pattern or adjustment

condition where the adjustment had not become the normality.

(5) After adjustment complete, exit the adjustment mode by

press ADJ KEY.

6. Adjustment of White Balance

6-1. Required Equipment

(1) Color analyzer (CA-100 or same product) (2) Automatic adjustor (with automatic adjustment hour

necessity and the RS-232C communication being possible)

(3) AV Pattern Generator

6-2. Connection Diagram of Equipment for

Measuring (Automatic Adjustment)

6-3. Adjustment of White Balance

Operate the Zero-calibration of the CA-100, then stick sensor to PDP module surface when you adjust.

For manual adjustment, it is also possible by the following sequence.

(1) Enter the ‘Ez - Adjust’ by pressing ADJ KEY on R/C for

adjustment.

(2) Select the 3. WHITE PATTERN using CH +/- Key and HEAT

RUN above 15 minutes by pressing the ENTER Key.

(3) Receive the Window pattern signal from AV Pattern

Generator. (AV Input) (4) Set Picture condition to “CLEAR Image”. (5) After stick sensor to center of screen, select the ‘2. White-

Balance’ of ‘Ez - Adjust’ by pressing the ADJ KEY n R/C for

adjustment. And enter adjustment mode by pressing the Right

KEY(

) .

(6) Adjust the Hight Light using R Gain/B Gain and adjust the

Low Light using G Cut/B Cut. (7) Adjust using Volume +/- KEY.

(G Gain : 120 / R Cut : 63)

Hight Light : 150±10 Cd

Low Light : 5±2 Cd

X; 0.280±0.003

Y; 0.290±0.003

Color temperature: 10,000°K±500°K

(8) After adjustment complete, move to Ez - Adjust screen by

pressing the ENTER(Y) KEY. And exit the adjustment mode

by press ADJ KEY.

ADJUSTMENT INSTRUCTIONS

<Fig 3> Adjustment Pattern : 720P Vertical Color Bar

High Light Adjustment

Low Light Adjustment

Signal Input

<Fig 4> Connection Diagram of Automatic Adjustment

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6-4. Main/Sub Contrast Adjustment

Main/Sub contrast adjustment is adjustment reduces the contrast difference of Main/Sub screen in PIP/POP/SPLIT Screen.

(1) After signal receiving above 1 second, press the ADJ KEY

on R/C for adjustment enter the ‘Ez - Adjust’ and select the ‘2. VPX3226’. Enter adjustment mode by pressing the Right KEY(

(2) When enter adjustment mode, becomes the image TV

6CH SPLIT Screen with automatic movement and appear below window.

(3) The contour of “US 6CH” letter of left Main screen is most

clear and it is clear, 1.Contrast (Main) after adjusting first, in order for right side Sub screen to contrast to become the left Main screen to contrast with same, 2.Contrast (Sub) it adjust. This time adjust using the volume +/- Key.

(4) After adjustment complete, exit the adjustment mode by

press ADJ KEY.

ADJUSTMENT INSTRUCTIONS

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