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BDP-LX54
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B
C
D
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F
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5. DIAGNOSIS
5.1 DIAGNOSIS FLOWCHART
Is the 12
V
power supplied to pins (2, 3 and 4) of P9001 inside
MAI
N
PWB-S (AT_12
V
) while AC is O
N
and the power source
is OFF?
Disconnect the P9001 connector on the MAI
N
PWB-S after
turn the power off, then do not pins 2 and 5 of P9001 on the
MAI
N
PWB-S short-circuit?
Is the 12
V
power supplied to pins (2, 3 and 4) of C
N
901
on the POWER Assy (AT_12
V
) while AC is O
N
and the power
source is OFF?
Check between C
N
901 on the POWER Assy and P9001 on the MAI
N
PWB-S
and their peripheral circuits. (e.g. nearly detached connector, disconnection)
Yes
Yes
N
o
N
o
Yes
N
o
Yes
[1] POWER Assy (POWER PWB-S)
[2] DRIVE Assy
Replace and check the MAI
N
PWB-S.
(Short-circuit is being caused in the MAI
N
PWB-S.)
Replace and check the POWER Assy. (The circuit up to 12
V
generation in the POWER Assy has broken down.)
The POWER Assy is normal. (12
V
power is supplied.)
Replace and check MAI
N
PWB-S.
Does SLED motor initialize while the
power is O
Does the spindle revolve when a disc is
inserted?
N
o
N
o
Yes
N
o
Does the problem (discs cannot be played back stably)
happen only to certain discs?
Does the problem happen only to BD, D
V
D or CD?
Is the error rate wrong?
N
o
N
o (The problem happens to all discs.)
N
o
1
Check the drive relay board (BRIDGE Assy) and circuits
around
C
N
101 and C
N
104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2
Replace and check MAI
N
PWB-S.
3
Replace and check BD drive.
1
Check the drive relay board (BRIDGE Assy) and circuits
around
C
N
101 and C
N
104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2
Replace and check MAI
N
PWB-S.
3
Replace and check BD drive.
(In case LD breakdown etc. causes the problem)
Replace and check BD drive.
(In case the problem derives from PU breakdown or
disc-related factors)
1
Check any dirt on discs
2
Check whether the problem is disc-specific
(e.g. Pirated edition)
3
Replace and check BD drive
(In case discs cause the problem)
1
Check any dirt on discs.
2
Check whether the problem is disc-specific.
MAI
N
PWB-S is likely
to have broken down.
MAI
N
PWB-S is likely
to have broken down.
1
Check the drive relay board (BRIDGE Assy) and circuits
around
C
N
102 and C
N
104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2
Replace and check MAI
N
PWB-S.
3
Replace and check BD drive.
MAI
N
PWB-S is likely
to have broken down.
1
Check the drive relay board (BRIDGE Assy) and circuits
around
C
N
103 and C
N
104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2
Replace and check MAI
N
PWB-S.
3
Replace and check BD drive.
MAI
N
PWB-S is likely
to have broken down.
(SLED is not
operating)
(It is not loading)
(The spindle
motor is not
revolving)
Yes
Yes
Power does not come ON.
BD drive does not operate properly.
Discs cannot be played back stably.
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TEL 13942296513 QQ 376315150 892498299
