Hitachi 32PD5000 Service Manual page 29

Troubleshooting (POWER)
Power cannot be turned on (LED does not light)
Is the input voltage
applied to Power supply unit?
(CN61
Are the voltages
applied to CN63
and CNPPS
of Power supply unit ?
Joint / Formatter PWB
Picture is displayed. But no sound
Speaker terminal and
Speaker cord.
Locked
Are the voltages
applied to EAJ1
of the Audio PWB?
Yes
Are the signals
applied to EAF1
of the Audio PWB?
Yes
Are there signals
on Speaker Terminals?
Yes
Speaker
32PD5000/42PD5000 (PW1)
No
, )
Yes AC inlet
pins
No
pins
[CN63]
Yes
Check
Unlocked
No sound
No
pins
+ 5V
+12V
GND
No
pins
L ch
R ch
Formatter PWB or
GND
No
AC Fuse
Power switch
F901 T6.3AH 250V
+5V [CNPPS] +30V
+3.3V + 5V
+12V
+10V
Check
Are the voltage
applied to EAJ1
(When EAJ1 is
disconnected.)
Yes
Audio PWB
Video PWB
Audio PWB
29
Filter PWB
Power supply unit
pins? No
Power supply
unit