Ricoh C211 Service Manual page 761

BULLETIN NUMBER:
APPLICABLE MODEL: VT2130
SUBJECT: REVERSE ROLLER CLUTCH
GENERAL:
REVERSE ROLLER CLUTCH - It has been
reported that a small horizontal white line may
appear 64mm from the leading edge of prints.
This occurs only when in photo mode and is
caused by a shock wave when the master is
clamped by the drum master clamper. To prevent
this white line, the Main PCB ROM has been
changed to delay the timing of the master
clamping. As a result of the new software, the
image on the prints is moved forward
approximately 2mm due to the slow response of
the current reverse roller and master clamper
mechanisms. To compensate for the new
software, the reverse roller clutch mechanism
has been changed from the combination of a
solenoid and a spring clutch to a magnetic
clutch. The parts listed on the part chart on page
2 have been changed to accommodate the new
style clutch.
NOTE: The part number of the ROM and Main PCB for the VT2130 has been changed. The Main PCB has
not been changed except for the ROM. The old and new PCB's are interchangeable.
OLD PART NO. NEW PART NO.
C2118112 C2118116
C2118114 C2118118
C2118113 C2118117
C2118045 C2118057
INTERCHANGEABILITY CHART:
OLD and NEW parts can be used in both OLD and
0
NEW machines.
NEW parts can be used in OLD and NEW machines.
1
OLD parts CAN NOT be used in NEW machines.
Must be installed as a set on units manufactured prior to the S/N cut-in. On units manufactured aft er the S/N cut-in or
3/S
previously modified, use the new part numbers individually.
SS830/95/VT2130-041
New clutch stopper
DESCRIPTION
Main Control Board - LG
Main Control Board - A4
Main Control Board - B4
IC -TMM27256BD - 20
2
3
Old spring clutch
has been removed
New style magnetic clutch
QTY INT
1 1 0
1 1 0
1 1 0
1 1 0
TABLE CONTINUED ON PAGE 2
NEW parts CAN NOT be used in OLD machines.
OLD parts can be used in OLD and NEW machines.
OLD parts CAN NOT be used in NEW machines.
NEW parts CAN NOT be used in OLD machines.
02/04/94
Upper
reverse
roller
REFERENCE
PAGE ITEM
63 30
63 30
63 30
63 29
Continued...