Canon LBP-2000 Service Manual page 50

3 . Inputs to and outputs from the DC controller
AC power input
Fixing heater
H101
THSW101
Thermal switch
Laser/scanner
assembly
Laser unit
BD
detection
PCB
Video
controller PCB
Connected to
Options
feeder (option)
controller PCB
Rod
J105
J1201
-31
-5
SW102
-4 -32
Main power switch
-34
-2
Power supply PCB
J102-
J907-
8
7
6
5
3
2
4
1
J908- J102-
3
2 10
1 11
J302
J104
J5
J101
Figure 2-2-4
DC controller PCB
RLYDRV When 'H', the relay goes ON
to cut power to the fixing heater.
/FSRDRV When 'H', the fixing
heater (H101) goes ON.
/100/200V
If a 200V power supply
PCB is installed, 'L'.
+5V
1
Fixed to 'L'.
2
DPICH
When 'L', turns on the laser to
3
/ENBLO
4
suit the VDO signal and the /VDO signal.
/LONO
6
When 'L', turns on the laser.
VDO
7
/VDO
Turns on the laser only if
5
the /ENBL signal is 'L' and,
8
in addition, the VDO signal is
'H' whether /VDO signal is 'L'.
(differential input signal)
+3.3V
9
/BDIN
BD input signal (pulse signal)
For details, see II-F 'Controlling
the Video Interface' in Chapter 2.
For details, see VII.
'Paper Feeder' in Chapter 2.
CHAPTER 2
2 - 11