Ricoh A151 Field Service Manual page 288

POWER DISTRIBUTION
7. POWER DISTRIBUTION
NOTE: Items marked with an
copiers.
A C P o w e r ( 1 1 5 V o r 2 2 0 V ~ 2 4 0 V )
F u s i n g L a m p
Exposure Lamp
Main Motor
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.
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.
A202/A203


are different from the A151 and A152
M a i n S W
Cover Safety SW
2 4 V ( V A )
Power Relay
( R A 4 0 1 )
2 4 V ( V A )
F u s i n g L a m p
Drive Circuit
2 4 V ( V A )
Exposure Lamp
Drive Circuit
2 4 V ( V A )
Main Motor
Relay (RA402)
AC Drive Board
2 4 V ( V A )
D C P o w e r
5 V ( V C )
Supply Board
Zero Cross
8-10
Anti-condensation Heaters
-Drum (Option)
-Optics (Option)
S c a n
5 V Operation Panel Board
Signal
Sensors
Switches
5 V ( V C )
DF Interface Board
(A203 copier only)
Thermistors
R A M
P a c k
Solenoids
Clutches
M a i n
Power Packs
Board
Lens Motor
(A203 copier only)
2 4 V ( V A )
4th/5th Mirror Motor
(A203 copier only)
Optics Cooling Fan Motor
(A202 and A203 copier)
Exhaust Blower Motor
Toner Supply Motor
Q u e n c h i n g L a m p
5 V ( V C )
Image Density Sensor
2 4 V ( V A )
Scanner Motor
A203D500.wmf
SM