Diagnosis; Diagnosis Flowchart - Pioneer BDP-LX54 Service Manual

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5. DIAGNOSIS

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5.1 DIAGNOSIS FLOWCHART

A
[1] POWER Assy (POWER PWB-S)
Power does not come ON.
Is the 12V power supplied to pins (2, 3 and 4) of P9001 inside
MAIN PWB-S (AT_12V) while AC is ON and the power source
is OFF?
Disconnect the P9001 connector on the MAIN PWB-S after
turn the power off, then do not pins 2 and 5 of P9001 on the
MAIN PWB-S short-circuit?
B
Is the 12V power supplied to pins (2, 3 and 4) of CN901
on the POWER Assy (AT_12V) while AC is ON and the power
source is OFF?
Check between CN901 on the POWER Assy and P9001 on the MAIN PWB-S
and their peripheral circuits. (e.g. nearly detached connector, disconnection)
[2] DRIVE Assy
BD drive does not operate properly.
C
Does the problem (discs cannot be played back stably)
happen only to certain discs?
Does the problem happen only to BD, DVD or CD?
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L 13942296513
Is the error rate wrong?
1
Check the drive relay board (BRIDGE Assy) and circuits
D
around CN101 and CN104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2 Replace and check MAIN PWB-S.
3 Replace and check BD drive.
Discs cannot be played back stably.
Does SLED motor initialize while the
power is ON?
E
Yes
Does it load?
Yes
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Does the spindle revolve when a disc is
inserted?
F
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No
Yes
Yes
No
No (The problem happens to all discs.)
No
MAIN PWB-S is likely
to have broken down.
No
(SLED is not
operating)
No
(It is not loading)
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No
y
(The spindle
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motor is not
revolving)
2
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8
Yes
The POWER Assy is normal. (12V power is supplied.)
Replace and check MAIN PWB-S.
No
Replace and check the MAIN PWB-S.
(Short-circuit is being caused in the MAIN PWB-S.)
No Replace and check the POWER Assy. (The circuit up to 12 V
generation in the POWER Assy has broken down.)
(In case discs cause the problem)
Yes
1 Check any dirt on discs.
2 Check whether the problem is disc-specific.
Yes (In case LD breakdown etc. causes the problem)
Q Q
Replace and check BD drive.
3 6 7 1 3
(In case the problem derives from PU breakdown or
Yes
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
1
Check the drive relay board (BRIDGE Assy) and circuits
around CN101 and CN104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2 Replace and check MAIN PWB-S.
3 Replace and check BD drive.
1
Check the drive relay board (BRIDGE Assy) and circuits
around CN102 and CN104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
2 Replace and check MAIN PWB-S.
3 Replace and check BD drive.
1
Check the drive relay board (BRIDGE Assy) and circuits
u163
around CN103 and CN104.
Check any connector nearly detached or obliquely inserted.
Check any disconnected pattern etc.
.
2 Replace and check MAIN PWB-S.
3 Replace and check BD drive.
BDP-LX54
3
4
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
MAIN PWB-S is likely
to have broken down.
MAIN PWB-S is likely
to have broken down.
m
co
MAIN PWB-S is likely
to have broken down.
4
9 9
2 8 9 9