Overall Machine Control; System Control; Power Distribution - Ricoh Aficio 1013 Service Manual

SPECIFICATIONS

3. OVERALL MACHINE CONTROL

3.1 SYSTEM CONTROL

The basic fax unit consists of two PCBs: the FCU and the NCU.
The FCU controls all fax communications and fax features. The NCU switches the
analog line between the fax unit and the external telephone.
Refer to Section 6 of the base copier's service manual for details.

3.2 POWER DISTRIBUTION

The PSU (Power Supply Unit) generates +5V (+5VE) and +24V (+24VE) DC, and
supplies these to the FCU.
The FCU includes regulators that generate +3V (specifically, +3.3V) and +12V for
internal use, as indicated below.
Source Voltage
+5VLD*
+12V
+24VES
+24VE
+24VM*
+24VMM*
+3V
+3VA
+3VBAT
+3VD
+3VE
+3VV
+5VE
+5V
+5VA
+5VCD
+5VDS
+5VHCT
+5VSPD
+5VVA
+5VVD
*Supply is cut off if interlock switch is open.
B465
For the LDDR
For the SBU.
For the lamp stabilizer and DF relay board.
For the main motor, polygon motor, PSU, cooling fan, clutches,
power pack, quenching lamp, mechanical counter, optional paper
tray.
For the scanner motor and DF motor.
For the Op-port, sensors, and optional printer unit
For the SDRAM, VPL, CIOP, and modem.
For analog communication processing
Supplied from a long-term lithium battery; backs up the SRAM
(programmed settings) on the FCU.
Supplied from a rechargeable lithium battery; backs up stored data
DRAM and on optional IC card (both on the FCU) for 12 hours after
power goes off.
For the SCP2, flash ROM, and optional DIMM.
For the thermistor
For the power pack, sensors, DF relay board, and optional paper
tray.
For analog communication processing
For flash memory card
For the NCU
For the card I/F
For the monitor speaker
For video processing
For the SBU.
7-6
Description
SM