Ricoh A163 Service Manual page 293

Name
Printed Circuit Boards
Main
PSU
AC Drive
FL Regulator
Operation Panel
Lamps
Exposure
Fusing
Pre-Transfer (PTL)
Quenching (QL)
Power Packs
Charge/Bias/
Grid Power Pack
Transfer/Separation
Thermistors
Hot Roller
Pressure Roller
Thermofuses
Fusing
Heaters
Anti-condensation
Others
Total Counter
Circuit Breaker
(Europe, Asia)/
Fuse (U.S.A.)
SM
Function
Controls all copier functions both directly and
through other PCBs.
Converts the voltage from AC to DC voltage.
Provides AC power to the fusing lamp and PSU.
Stabilizes power to the exposure lamp.
Controls the operation panel display.
Provides light to reflect the original's image onto
the drum (fluorescent lamp).
Provides heat to the fusing unit.
Reduces the charge on the drum surface prior to
image transfer.
Neutralizes any charge remaining on the drum
surface after cleaning.
Provides high voltage power for the charge corona,
charge grid, and development bias.
Provides high voltage power for the transfer corona
and separation.
Monitors the hot roller's surface temperature.
Monitors the pressure roller's surface temperature.
Protects the fusing unit against overheating.
Keeps moisture from forming inside the copier
(option).
Keeps track of the total length of copies made
(Europe) or the total copies made (U.S.A.).
Guards against voltage surges in the input power.
1-7
ELECTRICAL COMPONENTS
Index. No.
B047/B048
22
21
15
23
10
2
3
20
1
19
16
8
11
9
13
28
14