Ricoh Gestetner 5450, Руководство по обслуживанию, Страница: 199 / 315

MPU AND I/O BOARD REPLACEMENT 1 July, 1998
6-8
6.3 MPU AND I/O BOARD REPLACEMENT
SP mode data and other adjustment data are stored in the backup RAM on the
MPU. There are adjustable potentiometers on the I/O board.
Therefore, once the MPU and/or I/O boards are replaced, the following
adjustments are needed.
- When the MPU is replaced -
•
The SP mode data returns to the default. Save the data SP mode in order to
restore it later. If possible, print out all system parameter lists using SP8-70,
71, 72, 73, and 74. (The optional memory board is required to use the data
printout function.)
•
Carry out all copy image adjustments. (See "6.2 Copy Image Adjustment".)
•
Sensor board unit calibration. (See "6.5.8 Sensor Board Unit Calibration".)
•
Master end sensor adjustment. (See "6.7.7 Master End Sensor Adjustment".)
NOTE: If you use the backup RAM [A]
(IC117) from the old MPU on
the new one, all data,
including data in the SP
modes, will be restored. You
do not have to do the above
procedures. (The battery
inside the RAM preserves the
data even if the RAM is
removed from the MPU.)
- When the I/O board is replaced -
•
Carry out the adjustments for
the 1st drum master, 2nd drum
master, master eject, and
master edge sensors. (When
both MPU and I/O board are
replaced, carry out the master
end sensor adjustment, also.)
C229R503.WMF
[A]