Yamaha HTR-5920 Руководство по эксплуатации - Страница 16
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HTR-5920
• AMP P.C.B.
Does protect
circuit work?
YES
implementation
of speaker relay
YES
voltages of IC91
to 93 correct?
16
Start
Power on
NO
Is
NO
correct?
Are power
E
NO
Is connection of
all cable correct?
YES
Check voltages
NO
CN94 pin 2 : low
CN96 pin 5 : 1.5V
YES
Check Front Board
Check and replace
speaker relay (RY62-64)
Is input power
NO
voltage (AC) of D901
correct?
YES
Is output power
NO
voltage (DC) of D901
correct?
Check IC91 to 93
Check connections of
cable
Check Protect circuit
and power supply part
Check Power
transformer
Check and replace
D901