Sony AVD-K150B Service Manual page 29

(C)
Hi-Fi REC.
YES
It is impossible to record Hi-Fi Audio
signal.
YES
Check Vcc of IC801.(Pins34, 40)
YES
Check IC801 Pin42(Data), Pin43(CLOCK).
YES
Do Audio signals appear at IC801
Pins16, 17?
YES
Do FM Audio signals appear at IC801
Pin36?
YES
Check the Contact Point of Drum
Connector if good then Replace the Drum.
AVD-K150B/K150E/K150G/K150N/K150R
NO
Check Power 5V, 12VT.
NO
Check ports of µ-COM.
NO
Check Audio input signal of IC801
Pins2, 3(TU.A.), 4, 5(DVD.A.),
6, 7(AVI.A.), 8, 9(AV2.A.), 10, 11(AV3.A.).
NO
Replace IC801.
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