Hitachi P50T01E - Page 25

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P50T01U/E P50TP01U/E P42T01U/E P42TP01U/E
[Optical Out (Digital Audio) troubleshooting]
D
Are signals
to PSPK connector of the
MAIN PCB normal?
Change Speaker or ESP1 (cable)
Yes
No
Change MAIN PCB
If no improvement,
change Terminal PCB
E
Yes
No
Change UT01 of Terminal PCB
Are the voltages of pin3 (+5V)/15(+30.7V)
of UT01 (tuner) of Terminal PCB normal?
Yes
Are the signals of
pin14(SIF_OUT) of UT01(tuner) of
Terminal PCB normal?
No
Change UT01 of Terminal PCB
No
Yes
Are the signals of
Pin35(L input)/36(R input) of
IX01 of Terminal PCB
normal?
Change Terminal PCB
Change MAIN PCB
If no improvement,
change Terminal PCB
Are the voltages of pin1/2/3(+5.6V) of
PPM2 connector of MAIN PCB
normal?
Yes
No
Optical Out (Digital Audio) hasnosound
Change MAIN PCB
If no improvement,
Check Power Supply Unit
Are the voltages of pin2 (+5.6V) of
HV01 of Terminal PCB normal?
Change Terminal PCB
No
Yes
Change Optical cable
If no improvement,
Change MAIN or Terminal PCB