Brother HL-4000CN Service Manual page 330

A B
2.9.1 Fusing and fuser heat control
1
2.8.6 UNFUSED
PRINT
2
2.9.2 FUSER
DRIVE
3
MCU AND HVPS PWB
PL15.1
DOUBLE
PLUG
J13 J138 P138
17 5 1
YEL YEL
4
+3.3VDC
(CH1.1)
18 4 2
YEL YEL
DC COM
(CH1.1)
21 1 5
YEL YEL
DC COM
(CH1.1)
5
DRIVE
PWB
CONTROL
PL15.1
LOGIC
J12 J42 J61 HEATER ON
20 11 4
DC COM
6
C D E
FUSING
D
FUSER ASSY
PL9.1
EXIT SENSOR
CONN-
ECTOR
J232 A5
P321 P323
A1 3
A4 A2 2
TEMP SENSOR
J322 1
A1 A5
LVPS
PL15.1
HEATER
HEATER
J165 J162 J325
5 CONTROL 2 3 3 1
AC RETURN
(CH1.1)
THERMOSTAT
N.C.
2 2
1 1
AC POWER
(CH1.1)
VI-33
F G
A
B
C
DI-2
CONN- DOUBLE
ECTOR PLUG
EXIT PAPER
J232 P138 J138
P323 P321 SENSED(L) +3.3VDC
1 A3 A3 3 3
YEL
A
FUSER TEMP SENSOR
J322
2
A4 A2 4 2
YEL
B
C
D
2.9 Fusing and Transportation
H J
2.9.3
HEAT
AIR
FUSED 2.9.4
PRINT
MCU AND HVPS PWB
PL15.1
1
+3.3VDC CONTROL
EXIT
LOGIC
PAPER
SENSED 2.9.6
J13 SIGNEL
19
YEL
1
TEMP
SENSOR 2.9.6
SIGNAL
20
YEL
1
Imaginary Line