Ricoh C231 Service Manual page 279

1.3 NEW ELECTRICAL COMPONENTS
1.3.1 MAIN BODY
1.3.2 TABLES OF ELECTRICAL COMPONENTS
Boards
Index No. Name
Main Processing
Unit (MPU)
2
Operation Panel
25
Boards
Power Supply Unit
(PSU)
17
Switches
Index No. Name
- Test Switch
Master Making Unit
- Cover Safety
Switch
SM
25
17
Controls all machine functions both directly and
through other boards.
(The backup RAM number on the MPU is changed
from IC140 to IC145.)
These boards control the operation panel.
Provides DC power to the system.
[VR2 on the PSU (used for adjusting thermal head
voltage) has been moved to a new position, but there
are no changes in its function.]
Not used for the C237 model
Not used for the C237 model
1-5
NEW ELECTRICAL COMPONENTS
2
C237V502.WMF
Function
Remarks
C231/C237/C238