POWER DISTRIBUTION
14 June, 2002
Spec-14
Item Supplied
By:
Description
+24VE PSU
Normally supplied when the main switch is on. Activated when
the CPU detects an activation when the machine is in energy
saver mode.
+24VED FCU
+24VM
FCU
For power pack, main motor and so on.
+24VMM
FCU
For paper feed motor, scanner, motor and so on.
+5VE
PSU
For circuits and sensors.
+5VLD
FCU
Mainly for LD unit.
+5VP
PIFP
For optional printer unit.
+5V
FCU
For circuits and sensors.
-5V
OPIF
Mainly for SiG4.
+3VE FCU
For
circuits.
+3V FCU
For
circuits.
1.4.2 MEMORY BACK-UP CIRCUIT
The MBU battery backs up the SRAM on the MBU, which contains user settings.
Make sure the battery switch is kept in the ON position.
The FCU battery backs up the DRAM on the MBU for up to 12 hours. This DRAM
contains the basic work areas and SAF memory. There is no battery switch.
+3VE
BAT1
SW1
Switching
Circuit
System
RAM
+3VBAT
+3VBAT
PORES_N
SCP2A
+5VE
DC/DC
Converter
+3VE
Comparator
+3VD
VDET_P
FCU
MBU
DRAM
BAT1
ZD3
BACKON_P
RTCCS
H310V907.WMF