Hitachi DV-RV8500E, Service Manual

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Details of Servicing and Troubleshooting > Troubleshooting
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No audio during playback
Is power supplied to
IC801-34, 40?
Are control signals
supplied to
IC801-42, 43?
Does audio signal
appear at IC801-35, 37?
Check P3D01 connector.
Does audio signal
appear at IC801-16, 17?
Does audio signal
appear at PMD02-19, 21?
Does audio signal
appear at PMD02-23, 25?
Envelope waveform at
IC801-44: At least
300 mVp-p?
Is A. head switching
signal input to
IC801-41?
Check 5.0V and
REG12V lines.
Check P3D01 connector.
Check IC501, and
replace if necessary.
Check AV1 jack (SC901).
Check
SYSTEM microprocessor
(IC501), and replace
if necessary.
Check wiring between
IC801-16, 17 and
PMD02-19, 21.
Replace IC801.
Replace VDR PCB.
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Does audio signal
appear at IC802-21, 25?
Replace IC802.