Fan Control Circuit - Sanyo PLC-XL51 Service Manual

Chassis Block Diagrams

Fan control circuit

S16V
215
P_FAIL
Power-On:H
285
FAN_SW1
413
BALAST_AC
212, 293
SCL0
SDA0
2
2
2
Q7871
Q7891
Q7892
1
IC3531
<M62334>
7
SCL0_5V
IC1302
SDA0_5V
TPFANA
FAN_1
6
D3621
IC7801
3
Q7801
TPFANB
FAN_2
6
D3626
IC7841
3
Q7841
P_FAIL
FAN_ERR
Power Error: On
TPFANC
FAN_3
6
D3631
IC7871
3
1
2
SIGNAL/MODE
2
3
POWER-ON
FAN_SW1
D/A
NORMAL
6
P_FAIL
IC8811 IC8821
TEMP. TEMP.
SENSOR_3 SENSOR_2
<MCP9801T> <MCP9801T>
2 1 2
- 76 -
K6L
1
2
D3622
K6M
1
2
D3624
K6N
1
2
D3627
K6P
1
2
D3629
1
2
Q3601
P_Fail: H
K6Q
1
2
D3632
IC4891
NAND
K8S
4
3
1
STAND-BY
H L
4
K8H
ERROR
H L
K8T
1
4
MAIN BOARD
FN901
FN902
FN903
FN904
FN905
LAMP
COVER
SW901
LAMP
BALLAST
BOARD
TEMP
IC4831
TEMP.
SENSOR_1
<MCP9801T>
2 1