Ricoh C231 - Page 306

ROM HISTORY
C231/C237/C238 4-16 SM
4.4 ROM HISTORY
4.4.1 C237 FIRMWARE MODIFICATION HISTORY
C237 FIRMWARE MODIFICATION HISTORY
DESCRIPTION OF MODIFICATION
REV.
LEVEL
SERIAL
NUMBER
This is the first mass production.
Main ROM:
C237 5105-
B
Feed ROM:
C237 5107-
A
MPU:
C237 5100-
B
Initial
Production
•
Improved the paper registration when the
machine feeds paper at 130 rpm.
Main ROM:
C237 5105-
B
Feed ROM:
C237 5107-
B
MPU:
C237 5100-
C
July 2000
Production
•
Corrected the image position failure when the
‘combine 2 original mode’ is used. (Main ROM)
•
To ensure paper registration at 130 rpm, paper
feed timing was changed. (Feed ROM)
Main ROM:
C237 5105-
C
Feed ROM:
C237 5107-
C
MPU:
C237 5100-
D
August 2000
Production
•
Modified because the counter on the operation
panel returns to the previous value when the
machine stopped because of a problem (e.g. jam
during a copy job).
Main ROM:
C237 5105-
D
Feed ROM:
C237 5107-
C
MPU:
C237 5100-
F
September
2000
Production
This version causes problems and should not be
used.
Refer to version H history for the problem.
•
The specification of the ‘Combine 2 original mode’
for U.S. version models was changed from ‘LT x
LT = LG 77%’ to ‘LT x LT = LT 65%’.
•
The specification of the ‘Combine 2 original mode’
was changed to fit between the paper centerline
and the image centerline, and 5 mm at the leading
edge image was cut (see Remark 1 on the next
page).
•
The motion time of the pressure plate motor has
been changed from 2.8 ms to 1.8 ms, to prevent
the motor on master eject section has a load a
long term.
NOTE
:
This issue is related to the U.S. version
models only.
Main ROM:
C237 5105-
F
Feed ROM:
C237 5107-
C
MPU:
C237 5100-
J
October 2000
Production
Rev. 07/2001
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