LG 60PC1D - - 60" Plasma TV Manual de usuario

Plasma Display Panel Troubleshooting - 2007

60PC1D

Training Presentation

Advanced Dual Scan PDP Troubleshooting

Collection By Pravin Mevada

Pravin Mevada

Plasma Display Panel Troubleshooting - 2007

Contact Information

Customer Service (and Part Sales) (800) 243-0000

Technical Support (and Part Sales) (800) 847-7597

USA Website (GCSC) aic.lgservice.com

Customer Service Website us.lgservice.com

LG CS Academy lgcsacademy.com

Published March 2007 by LG Technical Support and Training

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Preliminary Matters (The Fine Print)

IMPORTANT SAFETY NOTICE

The information in this training manual is intended for use by persons

possessing an adequate background in electrical equipment, electronic

devices, and mechanical systems. In any attempt to repair a major

Product, personal injury and property damage can result. The

manufacturer or seller maintains no liability for the interpretation of this

information, nor can it assume any liability in conjunction with its use.

When servicing this product, under no circumstances should the

original design be modified or altered without permission from LG

Electronics. Unauthorized modifications will not only void the warranty,

but may lead to property damage or user injury. If wires, screws, clips,

straps, nuts, or washers used to complete a ground path are removed

for service, they must be returned to their original positions and

properly fastened.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Preliminary Matters (The Fine Print)

CAUTION

To avoid personal injury, disconnect the power before servicing this

product. If electrical power is required for diagnosis or test purposes,

disconnect the power immediately after performing the necessary checks.

Also be aware that many household products present a weight hazard. At

least two people should be involved in the installation or servicing of such

devices. Failure to consider the weight of the product could result in

physical injury.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Preliminary Matters (The Fine Print)

ESD NOTICE

Some of the electronics are electrostatic discharge (ESD) sensitive. ESD

can weaken or damage the electronics in a manner that renders them

inoperative or reduces the time until their next failure. Connect an ESD

wrist strap to a ground connection point or unpainted metal in the product.

Alternatively, you can touch your finger repeatedly to a ground connection

point or unpainted metal in the product. Before removing a replacement

part from its package, touch the anti-static bag to a ground connection

point or unpainted metal in the product. Handle the electronic control

assembly by its edges only. When repackaging a failed electronic control

assembly in an anti-static bag, observe these same precautions.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Preliminary Matters (The Fine Print)

REGULATORY INFORMATION

This equipment has been tested and found to comply with the limits for a

Class B digital device, pursuant to Part 15 of the FCC Rules. These limits

are designed to provide reasonable protection against harmful interference

when the equipment is operated in a residential installation. This

equipment generates, uses, and can radiate radio frequency energy, and,

if not installed and used in accordance with the instruction manual, may

cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the

following measures: Reorient or relocate the receiving antenna; Increase

the separation between the equipment and the receiver; Connect the

equipment to an outlet on a different circuit than that to which the receiver

is connected; or consult the dealer or an experienced radio/TV technician

for help.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Preliminary Matters (The Fine Print)

COMPLIANCE

The responsible party for this device’s compliance is:

LG Electronics Alabama, Inc.

201 James Record Road,

Huntsville, AL, 35824.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Safety & Handling Regulations

1. Check the appearance of Panel and boards.

2. Check the model label. Verify model names and board model matches.

3. Check details of defective condition and history.

Ex) COF long 2-1 fail, address 1 line open, Y b/d trouble, Mal-discharge on screen.

1. Approximately 10 minute pre-run time is required before any adjustments are performed.

2. Do not adjust for higher or lower voltage ( Refer to Voltage Sticker inside the Panel ) than is specified for the product.

3. Be cautious of electric shock from the PDP module since the PDP module uses high voltage, it is recommended that you

should not touch the Power Supply or Drive circuits for at least one minute because of residual current stored.

4. C-MOS circuits are used extensively for processing the Drive Signals and should be protected from static electricity.

5. The PDP Module must be carried by two people.

6. Be careful of short circuits when measuring voltages.

7. Be cautious of screws and other metal objects to prevent a short in the circuitry.

Checking Point before Requesting MODULE Repair

Safety Rules PLASMA Overview Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Troubleshooting Steps

Define, Localize, Isolate and Correct

•Define Look at the symptom carefully and determine what circuits could be

causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for

burned parts and check for possible overheated components. Capacitors will

sometimes leak dielectric material and give off a distinct odor. Frequency of power

supplies will change with the load, or listen for relay closing etc.

•Localize After carefully checking the symptom and determining the circuits to

be checked and after giving a thorough examination using your senses the first check

should always be the DC Supply Voltages to those circuits under test. Always confirm

the supplies are not only the proper level but be sure they are noise free. If the

supplies are missing check the resistance for possible short circuits.

•Isolate To further isolate the failure check for the proper waveforms with the

Oscilloscope to make a final determination of the failure. Look for correct Amplitude

and Timing of the signals also check for the proper Duty Cycle of the signals.

Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.

•Correct The final step is to correct the problem. Be careful of ESD and make

sure to check the DC Supplies for proper levels. Make all necessary adjustments

and lastly always perform a Safety AC Leakage Test before returning the product

back to the Customer.

Troubleshooting

Plasma Display Panel Troubleshooting - 2007

Overview of Topics to be Discussed

•Y SUS Board

•Z SUS Board

•Y Drive Board

•Control Board

•X Drive Boards

2. Circuit Board Operation, Troubleshooting and Alignment :

Troubleshooting

1. Disassembly Instructions, Circuit Board Layout, and Identification

•Switch mode Power Supply

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