Ricoh Aficio FT4027, Service Manual

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TECHNICAL SERVICE BULLETIN
BULLETIN NUMBER: 4027/4527/5035/5535/4022/4522 - 013 02/21/96
APPLICABLE MODEL: FT4027/4527/5035/5535
SUBJECT: WHITE BANDS IN HALFTONE AREAS
SYMPTOM:
White bands in halftone areas in 200% enlargement mode.
CAUSE:
Light is reflected from the 6th mirror bracket.
SOLUTION:
A Mirror Seal has been added to correct the problem.
REFERENCE
PART
NUMBER DESCRIPTION QTY
MODEL
FT5535/5035 FT4027/4527
PAGE ITEM PAGE ITEM
A0481801 Mirror Seal
0
→
1
35 28* 33 28*
A1531923 6th Mirror Bracket
0
→
1
35 27 33 27
* DENOTES NEW ITEM
NOTE: A part number has been assigned for the 6th Mirror Bracket.
UNITS AFFECTED
The Mirror Seal was cut into production with the following Serial Numbers:
•
FT5035/5535 - A3625040001 / A3695040001
•
FT4027/4527 - A363507XXXX / A371507XXXX
INTERCHANGEABILITY CHART:
0
OLD and NEW parts can be used in both OLD and
NEW machines.
2
NEW parts CAN NOT be used in OLD machines.
OLD parts can be used in OLD and NEW machines.
1
NEW parts can be used in OLD and NEW machines.
OLD parts CAN NOT be used in NEW machines.
3
OLD parts CAN NOT be used in NEW machines.
NEW parts CAN NOT be used in OLD machines.
3/S
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
previously modified, use the new part numbers individually.
CUSTOMER SERVICE GROUP
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6th Mirror Bracket
Mirror Seal
0 ~ 0.5mm
0 ~ 0.5mm