Chapter 9. Trouble shooting
Service Manual
50
9-1. Power Supply Board Failure Check.
State:No picture
First,check cables which connect with PSU,then check as follows
Check input voltage
voltage: +5VSB----POWER ON(2.6V) -----+12V
State:No sound
First,check cables which connect with PSU,then check as follows
1) Check input voltage as NO picture
2) Check speaker output
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speaker.
PW_CTL
POWER-ON/OFF
POWER-ON/OFF
PB-ON/OFF
PB-ADJUST
5Vstb
+12V
5Vstb
+12V
Normal: H
Standby:L
R395
4.7K
R395
4.7K
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
CN10 Power_Main
CN10 Power_Main
R372
NC/0R
R372
NC/0R
R532
100R
R532
100R
R373
4.7K
R373
4.7K
R374
1K
R374
1K
1
2
3
Q35
3904
Q35
3904
1
2
3
Q36
3904
Q36
3904
HBTV-32D02 / 40D02
CONFIRA AS SAÍDAS DE AUDIO RCA E DOS FONES DE OUVIDO!!!