Fan Control Circuit - Sanyo PLC-XE50A Service Manual

Fan control circuit

S16V
215
P_FAIL
Power-On:H
285
FAN_SW1
413
BALAST_AC
212, 293
SCL0
SDA0
2
2
2
Q7841
Q7891
Q7892
1
IC3531
<M62334>
7
SCL0_5V
IC1302
SDA0_5V
TPFANA
FAN_A
6
D3621
IC7811
3
Q7813
TPFANB
FAN_B
6
D3626
IC7841
3
Q7864
P_FAIL
FAN_ERR
TPFANC
FAN_C
6
D3631
IC7871
3
P_FAIL
1
2
SIGNAL/MODE
2
3
POWER-ON
FAN_SW1
D/A
NORMAL
6 P_FAIL
IC8811 IC8821
TEMP. TEMP.
SENSOR3 SENSOR2
<MCP9801T> <MCP9801T>
2 1 2
- 69 -
Chassis Block Diagrams
K6L
D3622
K6M
D3624
K6N
D3627
K6P
D3629
Q3601
P_Fail: H
Power Error: On
K6Q
D3632
Q3601
P_Fail: H
Power Error: On
IC4891
NAND
K8S
4
3
1
STAND-BY
H L
4
K8H
ERROR
H L
K8T
1
4
MAIN BOARD
FN901
1
2
FN902
1
2
FN903
1
2
FN904
1
2
1
2
FN905
1
2
LAMP
COVER
SW901
LAMP
BALLAST
BOARD
TEMP
IC4831
TEMP.
SENSOR1
<MCP9801T>
2 1