Sanyo VHR-H772EV, Service Manual

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3-19
Check power.
Check IC501 Pin 23.
(Audio head switch 25)
Check the Vcc of
IC801.(Pins 34, 40)
Is the Head switching signal
IC802 Pin 41 O.K?
Check the connection at
P3D01 if good then
Replace IC801.
Check Ports of µ-COM.
Replace IC801.
Hi-Fi Playback.
No sound
Check the Hi-Fi Selection
Switch and the Tape quality.
Is the RF Envelope at
IC801 Pin 44 over 2Vp-p?
Check the Signal path
of Audio Output.
Do Audio signals appear at
IC801 Pin 16(L-CH),
17(R-CH)?
Check IC801 Pin 42(Data),
Pin 43(Clock).
A.
YES
NO
YES
NO
NO
NO
NO
6. Hi-Fi Circuit (Hi-Fi Model)
YES
YES
YES
YES
YES