Fan Control Circuit - Sanyo PLC-XU355A Service Manual

Chassis Block Diagrams

Fan control circuit

16V
ON_16V
374
Power-On:H
285
FAN_SW1
215
P_FAIL
SIGNAL/MODE
POWER-ON
FAN_SW1
H
NORMAL
P_FAIL
H
30
TDAC1
128
TDAC2
284
BLAST_AC
293,212
SCL0
SDA0
1
PQ20W211P
9 10
Q7803
2 IC7811
<FA7703>
5
13
Q7813
Q7864
STAND-BY
L
ERROR
L
TPFANA
Q7812
FAN_A
D3613
TPFANB
2
3 FAN_B
IC7841
TPFANC
D3614
FAN_C
8
Q3601
P_FAIL
FAN_ERR
Power Error: On
IC4891
NAND
1
2
IC8831 IC8821
TEMP. TEMP.
SENSOR3 SENSOR2
<MCP9801> <MCP9801>
2 1 2 1
MAIN BOARD
-57-
FN905
K8E
1
2
D3623
FN904
K8G
1
2
D3622
FN903
K8B
1
2
D3621
FN901
K8F
1
2
D3624
FN906
K8P
1
2
D3628
FN902
K8J
1
2
1
D3627
P_Fail: H
K8H
LAMP
BALLAST
BOARD
1
SW901
1
LAMP
COVER
K8S
4
SW
3
R/C
IC8811
TEMP.
SENSOR1
<MCP9801>
2
K8D
6
5
1