Fan Control - Brother HL-4000CN Service Manual

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2.9.3 Fan control

COOLING FANS
1
2.9.1
HEAT AIR
2
3
MCU AND HVPS
DRIVE PWB
PWB
PL15.1
PL15.1
FUSER FAN
4
J12 STOP J42
CONTROL FAN
1 30
LOGIC CONTROL
YEL YEL
FUSER FAN
LOW
30 1
YEL YEL
5
REAR FAN
STOP
18 13
YEL YEL
REAR FAN
LOW
19 12
YEL YEL
6
C D
DO-13
(HIGH SPEED)
DO-14
(LOW SPEED)
DOUBLE FUSER FAN
PLUG PL1.1
FUSER FAN
J50 J137
ON(H) +24VDC P137
7 3 1
YEL YEL
DC COM
9 1 3
YEL YEL
DC COM
(CH1.1)
DO-13
(HIGH SPEED)
LVPS DO-14
(LOW SPEED)
PL15.1
REAR FAN
J61 J165 8 J166 ON(H) +24VDC
FAN
1 1
YEL YEL CONTROL
DC COM
3 6
YEL YEL
3
DC COM
VI-35
E F
DRIVE
PWB
DI-30
PL15.1
DOUBLE
PLUG
FUSER FAN FAIL
P137 J137 (H) +3.3VDC J50
MOT
2 2 8
YEL YEL
REAR FAN
PL15.1
DI-31
LVPS
PL15.1
REAR FAN FAIL
J166 J165
(H) +3.3VDC J61
MOT
2 7 2
YEL YEL
2.9 Fusing and Transportation
G H J
AIR
MCU AND HVPS PWB
PL15.1
CONTROL 1
+3.3VDC
LOGIC
FUSER FAN
FAIL SIGNAL
J42 J12
27 4
YEL YEL
+3.3VDC 1
REAR FAN
FAIL SIGNAL
29 2
YEL YEL
1
Imaginary Line
2.9.6
2.9.6