1.6. POWER DISTRIBUTION
1.6.1. Distribution Diagram *
The PSU su24V dc power to the FDU. The FDU converts the +24V
dc power supply to the following supplies.
+5V
This is normally on when the main switch is on.
+5VE
This is used for detecting an activation signal from the NCU, document feeder,
or operation panel when the machine is in energy saving mode.
+5VLD
This supplies the laser diode. It is interrupted if the fusing unit cover interlock
switch opens.
+5VV
This is a more stable power supply than +5V. It is used for the Contact Image
Sensor.
+5VD
This supplies back up power for the DRAM and the optional IC card on the
FCE. It can back up stored data for one hour after the power is switched off.
A rechargeable battery on the FDU is used to ge5VD.
+5VBAT
This supplies back up power to the system RAM on the FCE to back up the
programmed data. A lithium battery is used to ge5VBAT.
+24V
This is normally on when the main switch is on.
+24VD
This is interrupted if the fusing unit cover interlock switch opens.
+24VIN
This su24V to the fusing unit on/off switching circuit. It is interrupted if
the fusing unit cover interlock switch opens.
+24VM
This is interrupted if the machine enters energy saving mode.
-5V
This is used for the image sensor.
+12VP
This is supplied to the Flash ROMs on the FCE and the optional IC card.
+24VM
+5V
+24VM
+5V
+5VV
-5V
+24V
+5VE
+5VLD
+5V
+5VE
Motors
Feed Clutch
Stamp
Cooling Fan
Ozone Fan
Power Pack
Thermistor
Printer Sensors
+24VM
+24VD
+24VD
Optional
Counter
Optional 100
Sheet
Cassette
Printer
I/F
Main Switch
+24VD
+24VD
+5V
+5V
FDU
PSU
Fusing
Lamp
AC
Main
Power
AC Switching
Circuit
Fusing Unit
Interlock
Switches
LDDR
Image Sensor
Scanner Sensors
Operation Panel
NCU
FCE
+24VD
+24VM
+5V
+24V
+5V
+5VLD
+5VE
+12VD
+5V
-5V
+5vv
+5VE
+5V
DC-DC
Converter
12VP
DC-DC
Converter
24VIN
Fusing Lamp
ON/OFF
Circuit
AC115V or 230V
+5VD
+5VBAT
RS232C
I/F
+5V
IC
Card
+12VP
+5V
+5VD
LED Array
+24VM
+5VD
DC-DC
Converter
+24VD
+24VM
+24V
Optional PFU
H516V511.wmf
OVERALL MACHINE INFORMATION
August 2nd, 1995
POWER DISTRIBUTION
1-20