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Part 4: Troubleshooting
2.8 Fan Control Circuit
FN906
FN905
2
1
2
1
K8P
K8N
D8
D15
3
147
FN901
K6J
1
2
D69D
FN902
K6K
1
2
D69C
FN903
K6M
1
2
D69B
FN904
K6L
1
2
K8S
K6S
37
38
35
D69A
36
IC1804
19
FANDRIVE
I/O-SW
2
15
PSCL
IC7801
D/A
3
14
PSDA
<M62393>
Q67Q
D67D
D67Q
Q69A
POWER_FAIL
Q68Q
D68D
D68Q
K6S
13-14
19-20
21-22 11-12
K8S
POWER_FAIL
FAN_CONT1
FAN_CONT2
MAIN BOARD
Fig. 4-9
4-14
Q671
15.5V
7
6
Q67A
IC671
3
8
Q672
Q681
7
6
Q68A
IC681
3
8
Q682
Q66A
POWER BOARD
SENSOR BOARD
IC8801
IC4881
TEMP.
TEMP.
SENSOR
SENSOR
<LM76CH>
<LM76CH>
2
1
2
1
K6S
5
3
K8S
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