Power Distribution - Ricoh Robin Service Manual

POWER DISTRIBUTION

8. POWER DISTRIBUTION
AC Power (115V or 220V – 240V)
Fusing Lamp
Exposure Lamp
Main Motor
Quenching Lamp
Document Feeder
(Option)
AC power
DC power
When this copier is plugged in and the main switch is turned off, ac power is
supplied via the ac drive board to the optional anti-condensation heaters.
When the front cover and/or the exit cover is open, the cover safety switch
completely cuts off power to all ac and dc components. The RAM pack has a
back up power supply (dc battery) for the service program mode data and
misfeed job recovery.
When the main switch is turned on, the ac power supply to the
anti-condensation heater is cut off and ac power is supplied to the ac drive
board. The dc power supply board receives wall outlet ac power through the
ac drive board.
The dc power supply board converts the wall outlet ac power input to +5
volts, +24 volts, and a zero cross signal, all of which are supplied to the main
board.
Main SW
Cover Safety SW
24V (VA)
Power Relay
(RA401)
24V (VA)
Fusing Lamp
Drive Circuit
24V (VA)
Exposure Lamp
Drive Circuit
24V (VA)
Main Motor
Relay (RA402)
AC Drive Board
24V (VA)
DC Power
5V (VC)
Supply Board
Zero Cross
1-14
24 June 1994
Anti-condensation Heaters
-Drum (Option)
-Optics (Option)
Scan
Operation Panel Board
5V
Signal
Sensors
5V (VC)
Switches
DF Interface Board
(A152 copier only)
Thermistors
RAM
Pack Solenoids
Clutches
Power Packs
Lens Motor
(A152 copier only)
24V (VA)
Main
4th/5th Mirror Motor
Board
(A152 copier only)
Optics Cooling Fan
Motor (A152 copier only)
Exhaust Blower
Motor
5V (VC)
Image Density Sensor
24V (VA)
Scanner Motor