Service manual

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Muting circuit Troubleshooting (if MUTE)
Q702(A102) Base “LOW”
Q701, Q751(IC302) Base “LOW” check
MUTE
Q702 Base and GND operation
status check
Refer to IC601(TDA7468D) IC specification
Refer Muting troubleshooting
Refer SPK replay troubleshooting
IC701 12PIN (over 2V) check and power
supply circuit check
No sound
IC 601 12, 27 PIN Output check
IC701 input check (14PIN)
IC701 output check (6PIN)
RY701 check
normal
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO