Mpu Replacement - Ricoh C231 Service Manual

MPU REPLACEMENT

6.3 MPU REPLACEMENT
SP mode data and other adjustment data are stored in the backup RAM on the
MPU.
Therefore, after replacing the MPU, be sure to do the following:
1) Vertical magnification adjustment (SP30, 36)
2) Side-to-side registration adjustment (SP31, 37)
3) Leading edge margin adjustment (SP33)
4) Leading edge registration adjustment (SP26, 38)
5) Correct drum type select (SP15)
NOTE: If you use the backup RAM [A]
(IC140) from the old MPU for
the new MPU, all data,
including data in the SP
mode, will be restored. You do
not have to do the above
procedures. (The battery
inside the RAM can hold data
when the RAM is removed
from the MPU.)
The following adjustments are needed even when you use the backup RAM from
the old MPU on the new one:
1) Ink detection adjustment (Refer to section 6.9.5)
2) Master end sensor adjustment (Refer to section 6.5.4)
C231/C237/C238
6-10
[A]
C229R503.WMF
SM