Fan Control Circuit - Sanyo PLC-WL2500A Service Manual

Chassis Block Diagrams

Fan control circuit

S16V
Power-On:H
190
FAN_SW1
374
FAN_CON_C
30
FAN_CON_A
120
FAN_CON_B
215
P_FAIL
SIGNAL/MODE
FAN_SW1
P_FAIL
293,212
SCL0
SDA0
IC7841
Q7842
IC7811
1,14
<TPS54286>
5,6
7
Q7813
Q7814
Q7801
POWER-ON STAND-BY
H L
NORMAL ERROR
H L
IC9885
14
LAMP_SCI
PIC MICOM
<LC87F2G>
IC8821
TEMP.
SENSOR B
<MCP9801>
2 1
TPFANC
FANC
TPFANA
D3644
3
FANA
12
D3613
8
Q7864
TPFANB
FANB
D3614
Q3601
P_FAIL
FAN_ERR
Power Error: On
IC4891
NAND
1
2
TEMP SENSOR A TEMP SENSOR C
<ROOM> <LAMP>
IC8811 IC8831
TEMP.
SENSOR A SENSOR C
<MCP9801> <MCP9801>
2 1
4 3
K8L
MAIN BOARD
-51-
FN905
K6K
1
2
D3626
FN901
K6J
1
2
D3629
FN902
K6F
1
2
D3621
FN903
K6G
1
2
D3622
FN904
K6E
1
2
D3623
FN906
K6P
1
2
D3628
FN907
K6Q
1
2
1
D3631
P_Fail: H
K8H
LAMP
BALLAST
BOARD
1
SW901
1
K8S
4
2
TEMP.
2 1
4 3
K8I
LAMP
COVER
SW