Fan Control Circuit - Sanyo PLC-XW55A Service Manual

Chassis Block Diagrams

Fan control circuit

S15.5V
Power-On:H
285
FAN_SW1
215
P_FAIL
SIGNAL/MODE
POWER-ON
FAN_SW1
P_FAIL
111
BLAST_AC
208,290
SCL2
SDA2
284,211
SCL1
SDA1
9
Q7801
Q7811
2 IC7811
<FA7703>
13
STAND-BY
H L
NORMAL ERROR
H L
12
<M62398>
2
SCL2_5
IC1303
SDA2_5
SCL1_S5
IC1302
SDA1_S5
TPFANA
Q7812
TPFANB
Q7862
10 8
5
Q7813
Q7864
P_FAIL
FAN_ERR
Power Error: On
13
IC3531
D/A
3
IC8811 IC8821
TEMP. TEMP.
SENSOR2 SENSOR1
<LM76CH> <LM76CH>
2 1 2
-44-
K6L
FANA
D3621
D3613
K6M
D3622
K8N
FANB
D3627
D3614
K6J
D3626
Q3601
P_Fail: H
K8H
IC4891
NAND
1
K8S
4
2
1
K8D
MAIN BOARD
FN904
1
2
FN903
1
2
FN901
1
2
FN902
1
2
1
LAMP
BALLAST
BOARD
1
MSW
SW901
1
3
R/C
IC8831
TEMP.
SENSOR3
<LM76CH>
2 1
5
6