Zenith Z50PX2D Service Manual

SERVICE MANUAL

Product Type: PLASMA Chassis: AF-05FD Manual Series: Manual Part #: Model Line: Product Year: 2005

Z50PX2D

Model Series:

CONTENTS

Description of Controls .................................................4

Specifications ..............................................................8

Adjustment Instructions ................................................9

Diagrams ...................................................................13

Parts List ...................................................................17

Schematics ....................................................................

Published Oct. 2003

by Technical Publications

LG Electronics USA, Inc.

201 James Record Road,

Huntsville, Alabama 35824-1513

Printed in Korea

http//www.zenithservice.com

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IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-visual service technicians.

When servicing this product, under no circumstances should the original design be modified or altered without permission from Zenith Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

CAUTION: Do not attempt to modify this product in any way.

Never perform customized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

GRAPHIC SYMBOLS

The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock.

The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE.

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the following:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items transported to and from the repair shop.

2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated.

3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign particles.

4. Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including the AC cord), and replace if necessary.

5. No lead or component should touch a receiving tube or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided.

6. After reassembly of the set, always perform an AC leakage test on all exposed metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets.

7. Caution customers against using a cart or stand that has not been listed by Underwriters Laboratories, Inc. for use with its specific model of television receiver or generically approved for use with TVs of the same or larger screen size.

8. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family.

PRODUCT SAFETY GUIDELINES

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DESCRIPTION OF CONTROLS...........................................4

SPECIFICATIONS.................................................................8

ADJUSTMENT INSTRUCTIONS ..........................................9

BLOCK DIAGRAM...............................................................13

EXPLODED VIEW...............................................................16

EXPLODED VIEW PARTS LIST.........................................17

REPLACEMENT PARTS LIST............................................18

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

PRINTED CIRCUIT BOARDS.................................................

TABLE OF CONTENTS

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

Controls

Front Panel Controls

TV/VIDEO

VOL

MENUTV/VIDEO ENTER

Z50PX2D

Z42PX1D

431

1. POWER Button

2. Remote Control Sensor

Power Standby Indicator

-Without CableCARD

: Illuminates red in standby mode,

Illuminates green when the TV is turned on.

-Inserting the CableCARD

: Illuminates orange in standby

mode, Illuminates green when the TV is turned on.

4. TV/VIDEO Button

5. MENU Button

6. ENTER Button

7. VOLUME (FF,GG) Buttons

8. CHANNEL (EE, DD) Buttons

DESCRIPTION OF CONTROLS

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S-VIDEO VIDEO

L / MONO

AUDIO

FRONT

A/V INPUT

HDMI /DVI INPUT

DIGITAL AUDIO

OPTICAL OUTPUT

(CONTROL/SERVICE)

RS-232C INPUT

AUDIO

VIDEO

COMPONENT INPUT 1

(MONO)

DVD /DTV INPUT

COMPONENT INPUT 2

MONITOR OUTPUT

A/V INPUT

VIDEO

AUDIO

S-VIDEO

CABLE

ANTENNA

RGB/DVI AUDIO INPUT

REMOTE CONTROL

AC INPUT

RGB INPUT

(VIDEO)

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.

Antenna Input

Connect over-the-air signals to this jack.

CABLE Input

Connect cable signals to this jack, either directly or through a cable box.

RGB/AUDIO INPUT

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

Digital Audio (DVI: Digital Visual Interface/Component2) Input/ Digital Audio Output

Connect digital audio from various types of equipment.

Note: In standby mode, these ports will not work.

DVD/DTV Input (Component 1-2)

Connect a component

video/audio device to

these jacks.

Remote Control Port

Connect your wired remote control here.

S-Video Input

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

RS-232C INPUT (CON-

TROL/SERVICE) PORT

Connect to the RS-232C port on a PC.

HDMI/DVI

connect a DVI(Video) signal to HDMI/DVI.

Audio/Video Input

Connect audio/video output from an external device to these jacks.

Connection Options

Back Connection Panel

Power Cord Socket

This TV operates on

an AC power. The

voltage is indicated on

the Specifications

page. Never attempt

to operate the TV on

DC power.

Monitor Output

Connect a second TV or Monitor.

DESCRIPTION OF CONTROLS

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

MODE

DAY -

DAY +

FLASHBK

TIMER

FREEZE

TV INPUT

TV/VIDEO

EXIT

GUIDE

TV INPUT

• Rotates the input mode between Antenna and Cable.

• Video, Front Video, Component 1-2, RGBDTV (or RGB-PC) and HDMI/DVI input

sources, screen returns to the last TV.

MUTE

Switches the sound on or off.

MODE

Selects the remote operating mode: TV,

DVD, VCR, AUDIO, CABLE or STB. Select

a mode other than TV, for the remote to

operate an external device.

FLASHBK

Tunes to the recent channels.

EXIT

Clears all on-screen displays and returns to

TV viewing from any menu.

TIMER

Lets you select the amount of time before

your TV turns itself off automatically.

Brings up the main menu to the screen.

EZ PIC

Selects a factory preset picture mode

depending on the viewing environment.

FREEZE

Freezes the currently-viewed picture. Main picture is frozen.

TV/VIDEO

External input modes rotate in regular sequence: Antenna, Cable, Video, Front Video, Component 1-2, RGB-DTV (or RGB-PC) and HDMI/DVI input sources. (Video, Front Video, Component 1-2 input sources are linked automatically, only if these are connected )

RATIO

Changes the aspect ratio.

INFO

When you watch the TV, information displays on top of the screen. Not available in Component 1-2, RGB and HDMI/DVI mode.

FAV

Scrolls the Favorite channels.

Remote Control Key Functions

DESCRIPTION OF CONTROLS

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MODE

DAY -

DAY +

FLASHBK

TIMER

FREEZE

TV INPUT

TV/VIDEO

EXIT

GUIDE

NUMBER buttons

VCR/DVD BUTTONS

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

POWER

Turns your TV or any other programmed

equipment on or off, depending on mode.

Select a closed caption:

Off, CC1~4, Text1~4.

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

Allows you to navigate the on-screen menus

and adjust the system settings to your pref-

erence.

CHANNEL UP/DOWN

Selects available channels found with EZ scan.

PAGE UP/PAGE DOWN

Moves from one full set of screen information to the next one.

EZ SOUND

Selects the sound appropriate for the pro-

gram's character.

SAP

Selects MTS sound: Mono, Stereo, and SAP in Analog mode. Change the audio language in DTV mode.

LIGHT

Illuminates the remote control

buttons of selected mode.

VOLUME UP/DOWN

Increases/decreases the sound level.

GUIDE

Shows program schedule.

ADJUST

Adjusts screen position, size, and phase in

PC mode.

Remote Control Key Functions

DESCRIPTION OF CONTROLS

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

MODELS

AC100-240V ~ 50/60Hz

NTSC-M, ATSC, 64 & 256 QAM

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

75 Ω

32 ~ 104°F (0 ~ 40°C)

Less than 80%

55 / 1400

32.3 / 821

12.4 / 315

114.8 / 52.05

1366 x 768 (Dot)

Width (inches / mm)

Height (inches / mm)

Depth (inches / mm)

Weight (pounds / kg)

Resolution

Power requirement

Television System

Program Coverage External Antenna Impedance Operating Temperature Range

Operating Humidity Range

Z50PX2D

47.6 / 1210

27.6 / 701

11.6 / 295 79 / 35.9

852 x 480 (Dot)

Z42PX1D

SPECIFICATIONS

1. Application Object

These instructions are applied to all of the PDP TV, AF-05FD.

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 equipment. (2) Adjustments must be done in the correct order. (3) The adjustments must be performed in the conditions 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 be must kept 110V, 60Hz

during adjustment. (5) The receiver must be operational for about 15 minutes

prior to the adjustments.

1) After receiving 100% white pattern, the receiver must be operated 15 minutes prior to adjustment. (Or 8. White Pattern condition in EZ - Adjust)

2) Enter into White Pattern

- Pressing POWER ON Key on Service Remote Control

(S R/C)

- Enter the Ez - Adjust by pressing ADJ Key on Service

Remote Control (S R/C).

- Select the 8. White Pattern using CH +/- Key and

press the Enter(

Y) Key.

Display the 100% Full White Pattern.

[ The set will display white screen without a signal

generator in this mode.

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

3. EPLD Download

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

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

(1) Va Adjustment

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

2) Adjust RV601 voltage to match that of the label on the Top/Right of the panel. (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) Adjust RV401 voltage to match that of the label on the Top/Right of the panel. (Deviation : ±0.5V)

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ADJUSTMENT INSTRUCTIONS

VSC

B/D

<Fig 1> Connection Diagram of EPLD Download

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

<Fig. 2> Connection Diagram of Power Adjustment for the

Measuring (Power Board)

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ADJUSTMENT INSTRUCTIONS

5. EDID(The Extended Display

Identification Data)/DDC (Display Data Channel) download

This is the function that enables “Plug and Play".

5-1. HDMI EDID Data Input

(1) Required Test Equipment

1) Jig for adjusting PC, DDC. (PC serial to D-sub. Connection equipment)

2) S/W for writing DDC(EDID data write & read)

3) D-Sub cable

4) Jig for HDMI Cable connection

(2) Preparation for Adjustments &

Setting of Device

1) Set devices as below and turn on the PC and JIG.

2) Open S/W for writing DDC (EDID data write & read). (operated in DOS mode)

5-2. EDID DATA for AF-05FD

: EDID for HDMI 1 (DDC (Display Data Channel) Data)

EDID table =

0 1 2 3 4 5 6 7 8 9 A B C D E F

___________________________________________________ 00 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 | 00 0F 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 | 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01 30 | 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28 40 | 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20 50 | 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C 60 | 47 2D 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD 70 | 00 3B 3C 1F 2D 08 00 0A 20 20 20 20 20 20 01 77 80 | 02 03 15 F2 46 84 85 03 02 07 06 23 15 07 50 65 90 | 03 0C 00 10 00 8C 0A D0 8A 20 E0 2D 10 10 3E 96 A0 | 00 C4 8E 21 00 00 18 8C 0A D0 8A 20 E0 2D 10 10 B0 | 3E 96 00 13 8E 21 00 00 18 8C 0A A0 14 51 F0 16 C0 | 00 26 7C 43 00 C4 8E 21 00 00 98 8C 0A A0 14 51 D0 | F0 16 00 26 7C 43 00 13 8E 21 00 00 98 00 00 00 E0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 88

: EDID DATA for RGB

EDID table =

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

__________________________________________________ 00 | 00 FF FF FF FF FF FF 00 1E 6D 01 01 01 01 01 01 10 | 06 0D 01 03 18 5C 34 96 08 CF 72 A3 57 4C B0 23 20 | 09 45 5D EF CE 00 31 D9 31 59 45 59 01 01 01 01 30 | 01 01 01 01 01 40 C3 1E 00 20 41 00 20 30 10 60 40 | 13 00 98 08 32 00 00 18 00 00 00 FC 00 4C 47 20 50 | 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD 00 30 60 | 4C 1E 64 0F 00 0A 20 20 20 20 20 20 00 00 00 00 70 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5

6. AD9883A-Set Adjustment

6-1. Synopsis

AD9883A-Set adjustment to set the black level and the Gain of optimum with an automatic movement from the analog => digital converter.

6-2. Test Equipment

Service R/C, MSPG925FA Pattern Generator(720P The Horizontal 100% Color Bar Pattern output will be possible and the output level will accurately have to be adjusted to

0.7±0.1Vp-p)

6-3. Adjustment

(1) Select Component1 or Component2 as the input with

100% Horizontal Color Bar Pattern(HozTV31Bar) in 720p Mode and select ‘Normal’ on screen.

(2) After receiving signal for at least 1 second, press the ADJ

Key on the Service R/C to enter the ‘Ez - Adjust’ and select the ‘2. AD9883A-Set’. Pressing the Enter Key to adjust with automatic movement.

(3) When the adjustment is over, 'AD9883A Component

Success’ is displayed. If the adjustment has errors, 'AD9883A Configuration Error’ is displayed.

(4) After the Component AD9883A adjustment is over, convert

the RGB-DTV Mode and display Pattern. When the adjustment is over, 'AD9883A RGB_DTV Success’ is displayed. If the adjustment has errors, 'AD9883A Configuration Error’ is displayed.

(5) Readjust after confirming the case Pattern or adjustment

condition where the adjustment had errors.

(6) After adjustment is complete, exit the adjustment mode by

pressing the ADJ KEY.

PDP TV SET

(or Digital Board)

<Fig. 3>

<Fig. 4> Adjustment Pattern : 720P/60Hz HozTV31Bar Pattern

+ 23 hidden pages