Details of Servicing and Troubleshooting > Troubleshooting
No Hi-Fi audio can be recorded
No
IIs power supplied to Check 5.0V and
IC801-34, 40?REG12V lines.
Yes
Check
Are control signals
NoSYSTEM microprocessor
supplied to
(IC501), and replace
IC801-42, 43?
if necessary.
Yes
Check to see if audio
Does audio signal Noinput signal appears
appear at IC801-16, 17?for each input source
(IC801-2,3,4,5,6,7,8,9,10,11).
Yes
No
Does FM audio signal
Replace IC801.
appear at IC801-36?
Yes
Check P3D01 connector.
(If the connector is normal,
replace the cylinder.)
(6) TUNER circuit
No image during RF output
Is 5 V supplied to No
Check 5.0V line.
TU701-1?
Yes
NoCheck voltage at
Is Hi signal supplied
IC501-26
to TU701-4?
(Hi: Tuner mode).
Yes
Does video signal NoCheck wiring between
appear at TU701-6?IC901-23 and TU701-6.
Yes
Replace TU701.
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