Sanyo PLV-WF10 Service Manual page 32

NO POWER -3 and
TEMPERATURE ABNORMALITY -2
Check the DC Voltages and Air-flow control circuit
Unit Sub power
VOLTAGE CONTROL SIGNAL
6.3V
9V
16V
-5V
CHECK !
DC VOLTAGES
CHECK !
FAN DRIVE OUTPUT
E C
FAN-C
Q6
B E C
FAN-A
Q2
B E C
FAN-B
Q9
B
Air-flow control signal
Air-flow control signal
Air-flow control signal
CHECK !
Q18
IC4
Q16
Q12
Q14
Troubleshooting
FAN-C
K66E
K66H
1 2 3
PF-4 PF-4 PF-4
PF-5
PF-3
PF-7
IC2 IC5
10 14 12
7 3 13
9
IC1
7 3 14
9
I / O Expander
Fan on/off signal
H : ON L : OFF
CHECK !
3.3V
FAN ON/OFF SIGNAL
5V
PF-1
-5V
Power On / Off Signal
-32-
FAN-C FAN-A FAN-B
K66F
1 2 3 4 5 1 2 3 4 5 6
PF-6
TP7611 TP7611
IC6
PF-1 4 2
2 SCL
PF-3 6
PF-4 7 3
3 SDA
PF-5 9
PF-6 10
PF-7 11
PF-8 12
4
Power Failure
Power On / Off Signal
16VA
L5
L7 16V
PF-8
TP7613 TP7613
SCL
SDA
SCL
SDA
3.3V
9V
6.3V
5V
16VA
-5V
16V