Hi-Fi REC.
It is impossible to record and playback
Hi-Fi Audio signal.
Check Vcc of IC801. (Pins 34,40)
Check Power.
Check ports of µ-COM.
Check Audio input signal of IC801
Pins 2, 3(TU.A.), 6, 7(Scart 1)
Replace IC801.
B.
Check IC801 Pin 42(Data),Pin 43(CLOCK).
Do Audio signals appear at IC801
Pins 16, 17?
YES
YES
YES
Do FM Audio signals appear at IC801
Pin 36?
Check the Contact Points of Drum
Connector if good then Replace the Drum.
YES
YES
NO
NO
NO
NO
3-20
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