C
Track on OK?
N
Signa TRSO
(pin13 of MT1379)
normal?
Check the connection
between OPU and BA5945
Check the TRSO connection
between MT1379 (pin13) and
MT1336 (pin26)
N
N
Y
Signal TEO
(pin21 of MT1336)
normal?
Check MT1336 and its
peripheral circuit.
Y
Signa l
T+ & T-
normal?
N
Y
Y
Check MT1336 and its
peripheral circuit.
Disk is READY?
Check RF Signal
N
Audio signal normal?
N
Output signal are
correct?
Check the circuit of
filter, Amplify, and mute
etc.
Check Audio DAC and i t s
periperal circuit
N
N
Y
Audio DAC receive
correct data?
Check connection between
MT1379 and Audio DAC
Y
Y
IR,VFD display
and Key fuction
ok?
N
N
IR, PT6312
communicate with
MT1379 OK?
Check connection between
MT1379 and PT6312 and its
periperal circuit
Y
check Remote Contriol
check KEY matrix
Check connection of VFD
Y
END
Y
29
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