Panasonic VDR-M70EG Service Manual page 53

Symptom
No sound from
speaker
No audio from AV
input/output
terminal
Audio from built-
in microphone
cannot be recorded
Audio from
external
microphone cannot
be recorded
Even if a normal
disc is inserted,
message "DISC
ACCESS"
continues to
appear, and the
disc is not
recognized.
Message "NO
DISC" appears
approx. 1 second
after a normal disc
is inserted.
Message "NO
DISC" appears
within 10 seconds
after a normal disc
is inserted.
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Service
Check points
position
TL1534 [MAN-B]
TL1535 [MAN-B]
TL6006 [MAN-B]
TL6009 [MAN-B]
IC6101-1, 7, 8, 14
[AEL-A]
(Do not solder lead
wire)
TL6101 [AEL-B]
TL6102 [AEL-B]
IC6201-3, 4
[AEL-A]
(Do not solder lead
wire)
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VDR-M70EG / VDR-M70EB / VDR-M70GC / VDR-M50EG / VDR-M50EB / VDR-M50GC
Detail of check
Can audio signal (SP_OUT+,
SP_OUT-) be confirmed?
Can audio signal (AUD-L,
AUD-R) be confirmed?
Can audio signal (MIC_INL,
MIC_INR) be confirmed?
Can audio signal (MIC_INL,
MIC_INR) be confirmed?
Can audio signal
(EXTMIC_LCH,
EXTMIC_RCH) be
confirmed?
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53
Troubleshooting due to
check results
Yes: Replace disc cover.
No: IC6103 and its
peripheral circuits
are faulty.
Yes: Replace MAN-H/
MAN circuit board.
No: IC6103 and its
peripheral circuits
are faulty.
No: Built-in
microphone, or
IC6101 and its
peripheral circuits
are faulty.
Yes: IC6201 or its
peripheral circuits
are faulty.
No: Q6101-6104,
Q6108, Q6109,
Q6207, Q6208 or
their peripheral
circuits are
faulty.
Yes: IC6201 or its
peripheral circuits
are faulty.
No: Replace MAN-H/
MAN circuit
board.
Replace disc drive unit.
If the DRF-H/DRF circuit
board is not damaged or
its connection status is
normal, replace disc drive
unit.
Replace disc drive unit.