Paper Delivery Section; Exit Pawl; Electrical Components; Main Processing Unit (Mpu) 1 - Ricoh C231 Service Manual

4.1.4 PAPER DELIVERY SECTION

1. Exit Pawl

The exit pawl clearance adjustment must be done prior to the drive timing
adjustment. Once this has been done then the drive timing adjustment must be
performed (See "6.10.4 Exit Pawl Clearance Adjustment" and "6.10.5 Exit Pawl
Drive Timing Adjustment").

4.1.5 ELECTRICAL COMPONENTS

1. Main Processing Unit (MPU) 1

After replacing the MPU, be sure to perform the following:
1) Vertical magnification adjustment (SP30, 36)
2) Side-to-side registration (SP31, 37)
3) Leading edge margin adjustment (SP33)
4) Leading edge registration adjustment (SP26, 38)
5) Correct drum type select (SP15)
If you use the backup RAM on the old MPU for new one, all data, including data in
the SP mode, will be restored. You do not have to perform the above procedures.
See "6.3 MPU Replacement."

2. Main Processing Unit (MPU) 2

After replacing the MPU, also perform the following:
1) Ink detection adjustment
2) Master end sensor adjustment
See "6.3 MPU Replacement."

3. Power Supply Unit

When replacing the power supply unit, be sure to adjust the voltage supplied to the
thermal head (See "6.5.3 Thermal Head Voltage Adjustment").

4. Sensor Adjustments

Adjustment is needed for the master end sensor. For details, see 6.5.4 Master End
Sensor Adjustment.
SM
PAPER DELIVERY SECTION
4-3
C231/C237/C238