Details of Servicing and Troubleshooting > Troubleshooting
(5) AUDIO circuit
No audio in EE mode
Does signal appear at No
IC801-6, 7 when AV1 Check AV1 jack (SC901).
audio is input?
Yes
Does signal appear at No
IC801-8, 9 when AV2 Check AV2 jack (SC901).
audio is input?
Yes
Does signal appear at No
IC801-10, 11 when Check AV3 jack (JK764)
and VDR P.C.B
AV3 audio is input?
Yes
Does signal appear at NoCheck VDR PCB, and
IC801-4, 5 during
DVD playback?replace if necessary.
Yes
Does signal appear at No
IC801-2, 3 during tuner Check tuner (TU701).
reception?
Yes
Is power supplied to NoCheck 5.0V and
IC801-34, 40?REG12V lines.
Yes
Are control signals NoCheck
supplied to SYSTEM microprocessor
IC801-42, 43?(IC501), and replace
if necessary.
Yes
Does audio signal appear No
at IC801-16, 17?Replace IC801.
Yes
Check wiring between
Does audio signal appear NoIC801-16, 17 and
at PMD02-19, 21?PMD02-19, 21.
Yes
Does audio signal appear No
Replace VDR PCB.
at PMD02-23, 25?
Yes
Check IC802 and
AV1 jack (SC901).
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ACEC
HITACHI
