11. Trouble Shooting
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Before starting Trouble Shooting
O
Trouble diagnosing and repairing of set mean find out which PCBs or blocks are
not working and replace them with new PCBs.
Repairing the broken PCBs are not necessary. Keep the broken PCBs and return
them to service center or R&D center.
O
This Trouble Shooting list only contains representative and simple PCB trouble
diagnosis and Module Exchange method.
Therefore, if you find sets that are difficult to diagnose or to repair, contact R&D center.
O
Basic Trouble Diagnosis procedure
1) Check problem Symptoms
2) Open Back Cover
3) Trouble Diagnosis & Replace broken PCB
4) Adjust new PCB module
5) HEATRUN for at least 30 minutes, inputting Full White test pattern
6) Full Function test
7) Repair Complete
O
Required Equipment for trouble diagnosis
1) Digital Multimeter(User Mode : measure DC Voltage, measure Diode Voltage,
Short-open test)
2) Screwdriver(or electric screwdriver), Plastic adjusting tool
3) Oscilloscope(for detailed examination only)
O
Before replacing PCBs, you MUST turn the AC switch “OFF”.
O
After replacing High Voltage Board(Power PCB, Y-SUS, Z-SUS, Data B/D, Scan B/D),
and Main & Sub PCB, extra adjustment might be needed.(Refer to Power Adjustment)
O
Dust or extraneous materials may cause bad connections.
Therefore, try to apply soft brush, air fresher, or breath to clean the dust or
extraneous materials.
O
While assembling the set in factory, it could have bad connection.
Try to reassemble the necessary connectors and also check the state of the connectors.
O
After the set is repaired, leave Back Cover open for followings.
Run HEAT RUN for at least 30 minutes by displaying Full White test pattern of
Service Mode(Refer to Service Manual ‘6. Service Mode’ part).
Check the screen conditions and basic functions(remote control operation etc.)
O
After Back Cover is closed, redo HEAT RUN for at least one hour with Full White
input using Test Pattern of Service Mode. Check the screen conditions and basic functions.
Summary of Contents for DPP-42A1GCSB
Page 7: ...Product Specification 7 2 3 Remote Control Setup Code...
Page 8: ...Product Specification 8...
Page 9: ...Product Specification 9...
Page 10: ...Product Specification 10...
Page 11: ...Product Specification 11...
Page 12: ...Product Specification 12...
Page 13: ...Product Specification 13...
Page 14: ...Product Specification 14...
Page 15: ...Product Specification 15...
Page 16: ...Product Specification 16...
Page 17: ...Product Specification 17...
Page 18: ...Product Specification 18...
Page 19: ...Product Specification 19...
Page 20: ...Product Specification 20...
Page 21: ...Product Specification 21...
Page 22: ...Product Specification 22...
Page 23: ...Product Specification 23...
Page 24: ...Product Specification 24...
Page 25: ...Product Specification 25...
Page 26: ...Product Specification 26...
Page 27: ...Product Specification 27...
Page 28: ...3 The Features of Inside 28...
Page 29: ...29 4 Block Diagram...
Page 47: ...Trouble Shooting 47 11 1 No Signal or No Raster...
Page 48: ...Trouble Shooting 48 11 2 No Sound...
Page 49: ...Trouble Shooting 49 11 3 Shut Down...
Page 50: ...Trouble Shooting 50 A Low Voltage Shut Down...
Page 51: ...Trouble Shooting 51 B Z SUS Digital B D Data B D Shut Down...
Page 52: ...Trouble Shooting 52 C Y SUS Scan B D Shut Down...
Page 53: ...Trouble Shooting 53 D High Voltage Shut Down...
Page 54: ...Trouble Shooting 54 11 4 No Key Operation...
Page 55: ...Trouble Shooting 55 11 5 No Remote Control Operation...
Page 56: ...Trouble Shooting 56 11 6 No Key and Remote Control Operation...
Page 57: ...Trouble Shooting 57 11 7 Abnormal Discharge...
Page 62: ...13 STRUCTURE OF PDP SET 62...
Page 66: ...66 STRUCTURE OF PDP SET COMPONENT PICTURE REMARK 7 BACK COVER...
Page 67: ...14 EXPLODED VIEW 67...
Page 77: ...English 2 Information of Boards 1 42X3 PDP Module 2 CTRL B D 3 Y SUS B D...
Page 78: ...4 Z SUS B D 5 Y DRV B D 6 XL XR B D XL XR...
Page 79: ...English 3 Label Information of Module 1 Identification Label...
Page 92: ......
