Fan Control Circuit - Sanyo PLC-WXU30A Service Manual

Chassis Block diagrams

Fan control circuit

S15.5V
215
P_FAIL
370
P_FAIL_FAN
Power-On:H
285
FAN_SW1
Power-On:H
296
FAN_SW2
373
30
128
185
BALAST_AC
SCL0_33V
212, 293
SDA0_33V
7
Q7811
IC7811
8
7
Q7861
IC7861
8
3
Q7864
P_FAIL
7
Q7841
IC7841
8
3
Q7844
Q7801
Q7804
-54-
TPFANA
Q7812
FAN_A
6
D3613
3
Q7813
TPFANB
Q7862
FAN_B
6
D3614
Q3601
D3617
Power Error: On
FAN_ERR
TPFANC
Q7842
FAN_C
6
D3644
Q3602
P_FAIL_FAN
D3618
IC4891
NAND
1
2
SIGNAL/MODE
POWER-ON
FAN_SW1
FAN_SW2 H
NORMAL
P_FAIL
H
P_FAIL_FAN
IC8811 IC8821
TEMP. TEMP.
SENSOR3 SENSOR2
<MCP9801T> <MCP9801T>
2 1 2 1
FN903
K8N
1
2
D3621
FN904
K6M
1
2
D3622
FN905
K6L
1
2
D3623
FN901
K6K
1
2
D3626
FN902
K6J
1
2
D3627
1
P_Fail: H
FN907
K8G
1
2
D3628
P_Fail: H
Power Error: On
LAMP
COVER
K8S
SW901
4
3
1
STAND-BY
LAMP
L
BALLAST
4
K8H
BOARD
ERROR
L
TEMP
IC4831
TEMP.
SENSOR1
<MCP9801T>
K8H
2
4
MAIN
1