Fan Control Circuit - Sanyo PLC-XU50 Service Manual

Chassis Block Diagrams

Fan control circuit

S6V
15.5V
48
P_FAIL
41
15
FAN_DRIVE
98.99
H8_SCL4
H8_SDA4
80,81
H8_SCL1
H8_SDA1
Q672
8
Q682
8
Power-On:H
14
IC6211
5
D/A
<M62392>
H8_SCL4_5
Q1826/Q1827
H8_SDA4_5
H8_SCL1_5
Q1821/Q1822
H8_SDA1_5
Q671
7 6 D67P
Q67P
IC671
3
Q67A
Q681
7 6 D68P
Q68P
IC671
3
Q68A
P_Fail: L
Power Error: On
SIGNAL/MODE
POWER-ON
FAN_DRIVE1
15
P_FAIL
2,3
IC2801 IC2831
TEMP. TEMP.
SENSOR1 SENSOR2
<LM76CH> <LM76CH>
2 1 2
-40-
K6K
1
2
D69D
K6M
1
2
D67Q
K6L
1
2
D69B
P_Fail: H
K8N
1
2
K8P
1
2
D68Q
D69A
K6J
1
2
D69C
Q69A
STAND-BY
H L
NORMAL ERROR
H L
IC2861
TEMP.
SENSOR3
<LM76CH>
1 2 1
MAIN BOARD
FN906
FN905
FN904
FN903
FN902
FN901