Hitachi 42PD9700C, Service Manual

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4
42PD9700C/U & 55PD9700C/U
Power
No
Yes
Is
the voltage
applied to PJF1 (3)pin ?
(Refer to Table2)
Is
the voltage
over than 4V applied to
PJF1(8)pin ?
Are the voltages
applied to all input pins from
power supply unit?
(Refer to Table1)
Are the voltages
applied to all output pins by
EPGgo signal?
(Refer to Table2)
Are the voltages
applied to all output pins by
DTT POWER signal?
(Refer to Table3)
Is
the voltage
over than 4V applied to
PJF1(5)pin?
Is the voltege
less than 1V applied to
PSP4(4)pin?
Does the red-LED light?
Power cannot be turned on (Continued)
Sub -p ower P C B
Check FC P C B
Yes
No
No
Check Power supply unit
Check FC P C B
Sub --p ower P C B
No
No
Sub -p ower P C B
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
* Check EPGgo signal
* Check input voltages
* Check output voltages by EPGgo signal
* Check Power off
* Check stand-by
* Check STB5V for FC P C B
* Check DTT POWER signal
* Check output voltages by DTT Power
Check FC P C B
Check Power supply unit
Table1 ( Table of input from Power supply unit )
input/output
signal
name
42PD9700U/C
pin No value(V) From/To
input 10V PSP1 (7)and(8) +9.9~ .6 Power supply unit
input 24V PSP1 (3)and(4) +23.75~ 26.25 Power supply unit
input STB5.8V PSP4 (1)and(2) +5.5~ 6. Power supply unit
Table2 ( Table of output by EPGgo signal )
input/output
signal
name
42PD9700U/C
pin No value(V) From/To
output 5.5V PJB1 (1)and(2) +5.4~ 5.9 Bridge madia unit
output 30V PJM1 (1) +31.3~ 33.6 Main P C B
output 10V PJM1 (3) +9.9~ . Main P C B
output 6V PJM1 (5) +5.4~ 5.9 Main P C B
output STB5V PJM1 (7) +4.8~ 6. Main P C B
output S3.3V PJM1 (9) +3.13~ 3.47 Main P C B
output 10V PJF1 (1) +9.9~ . FC P C B
output STB5V PJF1 (3) +4.8~ 6. FC P C B
output 6V PJF2 (1)and(2) +5.4~ 5.9 FC PCB B
output 3.3V PJF2 (5)and(6) +3.13~ 3.47 FC P C B
output 1.8V PJF2 (9)to(11) +1.71~ .89 FC P C B
output 3.3V PJA1 (1) +3.13~ 3.47 Audio P C B
output +25V PJA1 (7)to(9) +23.75~ 26.25 Audio P C B
Table3 ( Table of output by DTT POWER signal )
input/output
signal
name
42PD9700U/C
pin No value(V) From/To
output 5V PJM2 (2) +4.75~ 5.25 Main P C B
output 9V PJM2 (4) +8.55~ 9.45 Main P C B
output 12V PJM2 (6) +11.75~ 2.25 Main P C B
output 2.5V PJD1 (1) +2.35~ 2.65 DTT P C B
output 33V PJD1 (2) +30~ 33 DTT P C B
output 12V PJD1 (3) +11.75~ 2.25 DTT P C B
output 5V PJD1 (6) +4.75~ 5.25 DTT P C B
output 3.3V PJD1 (7) +3.15~ 3.45 DTT P C B
Note 1) GND(0V) is R508P or R509P of chip Jumper or the frame near Sub - power P C B.