Yamaha HTR-5920 Manuel d'entretien - Page 13
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• INPUT P.C.B.
Start
Power on
Is Input
selector of IC21
correct?
YES
outputs of VCR,
MD/CD-R
correct?
YES
Analog part is O.K.
NO
voltages of IC22 and
Check and replace IC21
Are
NO
Check and replace IC81
Are power
NO
IC23 correct?
YES
Are
waveforms of
NO
IC21 (pin 67 to 69)
correct?
YES
Are
NO
waveforms of
IC21 (pin 76 to 79)
correct?
YES
and JK12
HTR-5920
Check connections for
BN14 and AMP board
Check connections for
CN11 and FRONT board
Check and replace
IC21
13