Hitachi P50T01E Service Manual page 25

D
Are signals
to PSPK connector of the
MAIN PCB normal?
No
Change MAIN PCB
If no improvement,
change Terminal PCB
[Optical Out (Digital Audio) troubleshooting]
P50T01U/E P50TP01U/E P42T01U/E P42TP01U/E
Yes
Change Speaker or ESP1 (cable)
Optical Out (Digital Audio) has no sound
Are the voltages of pin1/2/3(+5.6V) of
PPM2 connector of MAIN PCB
Are the voltages of pin2 (+5.6V) of
HV01 of Terminal PCB normal?
Change Optical cable
If no improvement,
Change MAIN or Terminal PCB
E
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?
Yes
Are the signals of
Pin35(L input)/36(R input) of
IX01 of Terminal PCB
normal?
Yes
Change MAIN PCB
If no improvement,
change Terminal PCB
normal?
Yes
Yes
24
No
Change UT01 of Terminal PCB
No
Change UT01 of Terminal PCB
No
Change Terminal PCB
Change MAIN PCB
No
If no improvement,
Check Power Supply Unit
No
Change Terminal PCB