Hitachi 42PD8900TA Service Manual page 40

Power
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
Is
the voltage
over than 4V applied to
PJF1(5)pin?
Yes
* Check Power off
Is the voltege
less than 1V applied to
PSP4(4)pin?
Yes
Check FC PWB
42PD8900TA
No
* Check STB5V for FC PWB
Is
the voltage
applied to PJF1 (3)pin ?
(Refer to Table2)
Yes
No
Check FC PWB
No
Check Power supply unit
No
Sub Power PWB
No
Check FC PWB
No
Check Power supply unit
No
Sub Power PWB
Table1 ( Table of input from Power supply unit )
signal
input/output
name
pin No
input 10V PSP1 (7)and(8)
input 24V PSP1 (3)and(4) +23.75~26.25
input STB5.8V PSP4 (1)and(2)
Table2 ( Table of output by EPGgo signal )
signal
input/output
name
pin No
output 5.5V PJB1 (1)and(2)
output 30V PJM1 (1)
output 10V PJM1 (3)
output 6V PJM1 (5)
output STB5V PJM1 (7)
output S3.3V PJM1 (9)
output 10V PJF1 (1)
output STB5V PJF1 (3)
output 6V PJF2 (1)and(2)
output 3.3V PJF2 (5)and(6)
output 1.8V PJF2 (9)to(11)
output 3.3V PJA1 (1)
output +25V PJA1 (7)to(9)
40
42PD8900TA
value(V) From/To
+9.9~11.6 Power supply unit
Power supply unit
+5.5~6.1 Power supply unit
42PD8900TA
value(V) From/To
+5.4~5.9 Bridge madia unit
+31.3~33.6 Main PWB
+9.9~11.1 Main PWB
+5.4~5.9 Main PWB
+4.8~6.1 Main PWB
+3.13~3.47 Main PWB
+9.9~11.1 FC PWB
+4.8~6.1 FC PWB
+5.4~5.9 FC PWB
+3.13~3.47 FC PWB
+1.71~1.89 FC PWB
+3.13~3.47 Audio PWB
+23.75~26.25 Audio PWB