LG 60PC1D - - 60" Plasma TV User manual

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Plasma Display Panel Troubleshooting - 2007
60PC1D
Training Presentation
Advanced Dual Scan PDP Troubleshooting
Collection By Pravin Mevada
Pravin Mevada

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Plasma Display Panel Troubleshooting - 2007
Contact Information
Customer Service (and Part Sales) [phone]
Technical Support (and Part Sales) [phone]
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

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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

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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

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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

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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

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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

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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

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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

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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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Plasma Display Panel Troubleshooting - 2007
This section of the manual will discuss Disassembly, Layout and Circuit
Board Identification, of the 60PC1D Dual Scan Plasma Display Panel.
Troubleshooting
Upon completion of this section the Technician will have a better
understanding of the disassembly procedures, the layout of the printed
circuit boards and be able to identify each board.

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Plasma Display Panel Troubleshooting - 2007
Disassembly Procedure
60PC1D
Troubleshooting
To remove the Back Cover remove the 40 screws as shown ( the stand will not need to be removed )

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Plasma Display Panel Troubleshooting - 2007
Troubleshooting
60PC1D First Generation
Control Board
SMPS Board
6709V00016A
Y SUS
Board
Z SUS
Board
AC/DC
Board
6709V00018A
Main Board
EBT32634401
Y Drive
Boards
Top X Boards
Bottom X Boards
Bottom X Boards
Circuit Board Layout
PFC / Standby
6709V00017A
STB
Supply
Note : The Power Supply Circuit consists of 3 PCBs in Generation 1 and 2 PCBs in Generation 2

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Plasma Display Panel Troubleshooting - 2007
60PC1D Second Generation
Circuit Board Layout Troubleshooting
SMPS
EAY32961901
Control Board
EBT32929501
PFC / Standby
EAY32961801
Note: The Early Version prior to ( March / April 2007 ) had the
AC/DC Supply Board in this Position
The Power Supply and Control Boards are not interchangeable
From one Generation to the other.

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Plasma Display Panel Troubleshooting - 2007
Input Jacks
Troubleshooting
60PC1D
Circuit Board Layout

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Plasma Display Panel Troubleshooting - 2007
Troubleshooting
Disassembly Procedure 60PC1D
AC/DC Board Removal
Remove Cables P801 ( AC Input Cable ), P8015A ( P-CTL, Rush, 12V ), P8017A ( PFC B+, B- ) and
P8016A ( Standby B+, AC Detect ). Remove 6 screws securing the Board.
Power Supply PFC (pulse Frequency coefficient) Board Removal
Remove Cables P8017B ( PFC B+, B- ), P8016B ( Standby B+, AC Detect ), P8015B ( P-CTL, RUSH, 12V ),
P801A ( AC ON, P- CTL, ST 5V, GND, VS ON, 5V MNT, POD ), P804 ( 5V MNT, POD, GND, RUSH, VSON ),
and P803A ( PFC+, AC GND, 18V ). Remove 6 screws securing the Board.
SMPS Board Removal
Remove Cables P803B ( PFC B+, AC GND, 18V ), P804B ( POD, GND, RUSH, VSON ), P801B ( 19V, 19V,
GND, GND, 6V, GND, 3.4V, GND, 12V, GND ), P800B ( 3.4V, 3.4V, GND, GND, 6V, 6V, GND, GND,
12V, 12V, GND, GND ), P8012 ( 5VDC, GND ), and P8011 ( VA, GND, VS ).
Remove 8 screws securing the Board.
Z SUS Board Removal
Remove Cables P12 ( 5V, 5V, GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P1 (GND, GND, 5V, VA ),
P9 ( GND, GND, 5V, VA). Remove 7 screws securing the Board.
PC Boards appearing on this list Contain CMOS Semi Conductors and are ESD Sensitive

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Plasma Display Panel Troubleshooting - 2007
Disassembly Procedure 60PC1D Troubleshooting
Y SUS Board Removal
Remove Cables P1 ( VS, VS, NC, GND, GND, GND, GND, VA, VA ), P2 ( GND, GND, 5VDC, 5VDC )
P3 ( GND, GND, GND, GND, 5VDC, 5VDC, 5VDC, 5VDC ), P4 ( Logic Signals ), P5 ( 5VDC, 5VDC,
GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P6 ( GND, GND, 5VDC, VA ),
P7 ( GND, GND, 5VDC, VA ), P8 ( SUS_ DNT, 15V, 15V, SUS_ DNT, OC1_T_IN, OC2_T_IN, LET, NC,
SUS_DNT, DATA_T, CLKT_IN, SUS_DNT ), P10 ( SAME AS P8 ).
Remove 14 screws securing the Board.
Control Board Removal
Remove Cables P101, P102, P103, P104, P105, P106, ( RGB Logic Signals ), P200 ( Y SUS Logic Signals ),
P300 ( 5VDC, 5VDC, 5VDC, 5VDC, GND, GND, GND, GND ). Remove 5 screws securing the Board.
Top Y Drive Board Removal
Remove 10 Screws from the Metal Bracket marked “A” ( see page 19 ) to gain access to the Top Y Drive
Board. Carefully remove the Ribbon Cables P8, P9, P12, P13, P14, P15 and Connectors P2 ( Refer to P8
on the Y SUS Board ), and P4 ( Floating Ground ). Remove 5 screws securing the Top Y Drive Board.
Bottom Y Drive Board Removal
Remove 10 screws from the Metal Bracket marked “A” ( see page 18 ) to gain access to the Bottom
Y Drive Board. Carefully remove the Ribbon Cables P6, P7, P16, P19, P20, P21 and Connectors P1
( Refer to P8 on the Y SUS Board ) and P3 ( Floating Ground ). Remove 5 screws securing the Bottom
Y Drive Board.

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Plasma Display Panel Troubleshooting - 2007
Disassembly Procedure 60PC1D Troubleshooting
Top Middle X Drive Board Removal
X Board Removal will require the most disassembling of the unit as the Stand will need to be
removed. Refer back to page 19 and everything marked with a B will need to be removed to
change the X Boards. Start by laying the unit down on a table covered by a soft pad, be careful
not to scratch the screen, and remove the Stand. Two large screws recessed in Lower Chassis
Assembly will need to be removed to get the stand removed.
After the Stand the Lower Chassis Assembly which includes the Main Board will need to be removed.
The Main Board is part of the Lower Chassis and will not need to be separated from the assembly,
to remove the assembly, connectors P4004 ( from P 801A ), P4005 ( from P101B ), P4003 ( from P800B ),
P4007 ( from the Keyboard ), P5002 ( from the Side Input Jacks ), P7009 and 7010 ( Speakers ),
P6007 ( Y SUS Fan ) and P6009 ( Main Fan ), and last the LVDS Cable ( care must be taken as the
LVDS Cable is very fragile ), will need to be removed. Remove the 9 screws securing the
Lower Chassis Assembly and the AC Input Grounding Screw disconnect P801 ( AC Input )
from the AC/DC Supply Board and lift the Assembly clear place it in a secure location.
Care must be taken as there are different size screws with different thread design
Remove the 6 screws ( ea ) securing both Wall Mounting Support Brackets and set them aside. Remove
the 4 mounting screws for the Cooling Fan disconnect the connector and set it aside. Access is now
available to remove the screws from the brackets that hold the TCP IC’s and Ribbons in place.
Remove the brackets, being careful not to damage the Ribbon Cables, last remove the Ribbon Cables
and screws from the X Board to be replaced.

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Plasma Display Panel Troubleshooting - 2007
A
A
A
Troubleshooting
Disassembly Procedure 60PC1D
B
B
B
B
B
B B
B
B
BB

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Plasma Display Panel Troubleshooting - 2007
Z SUS
Board
Top X Drive Boards
5v, VA, VS
VA, VS
5v
5v, VA
5v, VA
Switch Mode
Power Supply
Y SUS
Board
Bottom X Drive Boards
Control
Board
5v, VA
5v
5v, VA
RGB
Logic Signals
RGB
Logic Signals
Logic Signals
5v, VA
Y Drive Top
5V, VA
Y Drive Bottom
Logic Signal
Logic Signal
Signal and Voltage Distribution for the 60PC1
5V, VA
5V, VA
5v, VA
RGB
Logic Signals
Troubleshooting
AC/ DC
Power
Supply
PFC
Supply
STB
Main
Board
LVDS
ON OFF
CONTROL
Y Drive
Signal
5V, VA