Hitachi 42PD9700C Service Manual page 42

Power cannot be turned on (Continued)
* Check stand-by
Does the red-LED light?
Yes
* Check EPGgo signal
Is
the voltage
over than 4V applied to
PJF1(8)pin ?
Yes
* Check input voltages
Are the voltages
applied to all input pins from
power supply unit?
(Refer to Table1)
Yes
* Check output voltages by EPGgo signal
Are the voltages
applied to all output pins by
EPGgo signal?
(Refer to Table2)
Yes
* Check DTT POWER signal
Is
the voltage
over than 4V applied to
PJF1(5)pin?
Yes
* Check output voltages by DTT Power
Are the voltages
applied to all output pins by
DTT POWER signal?
(Refer to Table3)
Yes
* Check Power off
Is the voltege
less than 1V applied to
PSP4(4)pin?
Yes
Check FC PCB
42PD9700 & 55PD9700
No
* Check STB5V for FC PCB
Is
the voltage
applied to PJF1 (3)pin ?
(Refer to Table2)
Yes
No
Check FC PCB
No
Check Power supply unit
No
Sub--power PCB
No
Check FC PCB
No
Sub-power PCB
No
Check Power supply unit
No
Sub-power PCB
41
42PD9700U/C
11.6
26.25
6.1
42PD9700U/C
5.9
33.6
11.1
5.9
6.1
3.47
11.1 FC PCB
6.1 FC PCB
5.9 FC PCB
3.47 FC PCB
1.89 FC PCB
3.47
26.25
42PD9700U/C
5.25
9.45
12.25
2.65 DTT PCB
33 DTT PCB
12.25 DTT PCB
5.25 DTT PCB
3.45 DTT PCB
-
C
C
C
C
C
B
C
C
C
C
C
C