Hitachi 42PD8800TA(PW3) Service Manual page 40

Power
Power cannot be turned on (Continued)
Does the red-LED light?
Yes
Is the voltage over than 4V
applied to PJF1(8)pin ?
Yes
Are the voltages
applied to all input pins from
power supply unit?
(Refer to note )
Yes
Are the voltages
applied to all output pins?
(Refer to note 1)
No
Is the voltege less than 1V
applied to PSP4 (4)pin?
Yes
Sub Power PWB
Note 1) table of input/output
signal
input/ output name
input 10V PSP1 (7)and(8)
input 24V PSP1 (3)and(4) +23.75 26.25 Power supply unit
input STB5.8V PSP4 (1)and(2)
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)
Note 2) GND(0V) is K303P of Jump wire or the frame near Subpower PWB.
42PD8800/32LD8800
* Check stand-by
No
* Check EPGgo signal
No
* Check input voltages
No
Check Power supply unit
* Check output voltages
Yes
Check FC PWB
* Check Power off signal
No
Check Power supply unit
42PD8800TA
pin No value V)
+9.9 11.6 Power supply unit
+5.5 6.1 Power supply unit
+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
* Check STB5V for FC
Is the voltage
applied to PJF1 (3)pin ?
(Refer to note 1)
Yes
Check FC PWB Sub Power PWB
input/ output
From/To
input
input
input
input STB5V
output
output
output
output
output STB5V
output
output
output STB5V
output
output
output
output
output
40
No
signal
32LD8800TA
name
pin No value V)
10V PSP2 (9)and(12) +9.9 11.1
24V PSP2 (5)and(6) +15.8 16.9 Power supply unit
5.4V PSP3 (1)to(3) +5.4 5.9
PSP4 (1) +4.8 5.5
5.5V PJB1 (1)and(2) +5.4 5.9
30V PJM1 (1) +31.3 33.6 Main PWB
10V PJM1 (3) +9.9 11.1
6V PJM1 (5) +5.4 5.9
PJM1 (7) +4.8 5.5
S3.3V PJM1 (9) +3.13 3.47 Main PWB
10V PJF1 (1) +9.9 11.1
PJF1 (3) +4.8 5.5
6V PJF2 (1)and(2) +5.4 5.9
3.3V PJF2 (5)and(6) +3.13 3.47 FC PWB
1.8V PJF2 (9)to(11) +1.71 1.89 FC PWB
3.3V PJA1 (1) +3.13 3.47 Audio PWB
+25V PJA1 (7)to(9) +15.8 16.9 Audio PWB
From/To
Power supply unit
Power supply unit
Power supply unit
Bridge madia unit
Main PWB
Main PWB
Main PWB
FC PWB
FC PWB
FC PWB