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21 May, 1999
POWER DISTRIBUTION
1-19
1.6 POWER
DISTRIBUTION
1.6.1 DISTRIBUTION DIAGRAM
The PSU su24V dc power to the FCU. The FCU converts the +24V to the
following supplies.
+24V
Normally on when the main switch is.
+24VD
This is interrupted if the fusing unit cover interlock switch opens.
+24VIN
Su24V to the fusing unit on/off switching circuit. It is interrupted if the fusing
unit cover interlock switch opens.
+24VMM
For the scanner, paper feed, and main motors.
+24VPP
For the power pack.
+5V
Normally on when the main switch is.
+5VBAT
Supplies back up power to the system RAM on the FCU to back up the
programmed data. A lithium battery gen5VBAT.
+5VD
Supplies back up power for the DRAM and the optional IC card on the FCU. It can
back up stored data for one hour after the power is switched off. A rechargeable
battery on the FCU gen5VD.
+5VE
Detects an activation signal from the NCU, SiG4 (G4 Unit), document feeder, or
operation panel when the machine is in energy saving mode.
+5VLD
Supplies the laser diode. It is interrupted if the fusing unit cover interlock switch
opens.
+5VT
For the thermistor.
+5VV
This is a more stable power supply than +5V. It is used for the contact image
sensor.
+3V
For the FCIP05 internal circuits.
+3VBAT
For the FCIP05 SRAM backup
+3VD
For the FCIP05 DRAM backup.
+3VV
For the FCIP05 AD convertor.
-9V
For the image sensor.
P a p e r F e e d
M o t o r
P o w e r P a c k
T h e r m i s t o r
S e n s o r s
Main Switch
FCU
PSU
Fusing Lamp
A C
Main
Power
AC Switching
Circuit
Interlock
S w i t c h
L D D R
Image Sensor
O p e r a t i o n P a n e l
+5VLD
+5V
+5VE
+5V
D C - D C
Converter
D C - D C
Converter
2 4 V M
24VD
24VIN
F u s i n g L a m p
O N / O F F
Switching
Circuit
AC115V or
230V
S c a n n e r M o t o r
+ 5 V D
D C - D C
Converter
+24V
+5V
+5VD
Paper Feed
Unit
+24VMS
Multi Purpose
Feeder
IC
Card
+24VMS
+5V
N C U
+5VLD
+24V
+5V
+5VEE
+24VM
-9VV
+5VV
+ 2 4 V M M
+ 2 4 V M
+5V
-9V
+5VT
+5V
+ 5 V O P P
+5VE
+ 2 4 V M M
F u s i n g F a n
T o n e r E n d
S e n s o r
+24V
Polygon
Motor
+24VM
-9V
-9V
Main
Motor
Paper Feed
Clutch
PC I/F
+ 5 V
+ 5 V E
+24VMM
+24VMS
+24VPP
D C - D C
Converter
+ 5 V D
+ 3 V D
D C - D C
Converter
+ 5 V B A T
+ 3 V B A T
D C - D C
Converter
+ 5 V
+ 3 V V
D C - D C
Converter
+ 5 V
+ 3 V
H547V515.WMF