Sony KE-37XS910 / KE-42XS910 / KE-MX37A1 / KE-MX37N1 / KE-MX37S1 Service Manual ▷ View online
– 25 –
4 PROBLEM ANALYSIS
4.1 OUTLINE OF REPAIR FLOW
Operation normal ?
PC board
unacceptable (NG) ?
Client claim
Product block/PDP module block
Locating cause of problem
Is PDP module block
Defective ?
Is the Panel defective ?
PC board replacement/Parts
replacement
Panel replacement/IC
module replacement
PC board
replacement/Parts
replacement
Processing to prevent
recurrence
Packing/Shipment
Recheck the problem description
Recheck problem
description
Installation in product
Product problem analysis/Repair
Return of repaired product
End of repair
N
Y
Heat run
Y
N
Product
manufacturer
(Repair center)
Repair center
Product
manufacturer
(Repair center)
Client
Client
N
Repair product
and Claim contents match
PDP module sent to factory
Operation normal ?
Repair product and
claim contents match
Is the panel faulty?
N
N
Y
N
Y
Product runs normally ?
Y
Y
Y
Y
N
N
Y
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4.2 OUTLINE OF PDP MODULE REPAIR FLOW
Appearance check
Appearance unacceptable
(NG) ?
Repair of appearance
requested ?
Perform operation test
(Chapter 4.4).
Repair description and returned
product rechecked.
Yes
Does ID of
returned product agree with ID
of actual
Repair defective spots
Problem recurred ?
Receipt of returned product
(Chapter 4.3)
No
Yes
Yes
Yes
No
No
No
Check description of
repair request.
No
Contents match ?
Problem symptom
nonrecurrence analysis mode
Yes
Yes
2
1
3
5
4
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Perform operation test (Chapter 4.4)
Shipment
No
Yes
Adjustment (Chapter 6)
Yes
1
Replace LOGIC PC board or
panel chassis ?
Fault mode classification (Chapter 4.5)
Fault analysis (Chapter 4.6)
Repair of faulty spots (Chapter 5)
3
Problem repaired?
End of repair
Warranty test (Running)
No
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Perform running test (Burn-in pattern)
Yes
Yes
5
Problem recurs ?
Implement module tapping
2
Turn off the main power
No
Problem symptom nonrecurrence
analysis mode/Shipment process mode
analysis mode/Shipment process mode
Problem recurs ?
3
No
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