Gestetner B147, Service Manual

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TECHNICAL SERVICE BULLETIN
Copyright

2004 RICOH Corporation. All rights reserved. Page 1 of 1
BULLETIN NUMBER: B147/B149 - 003 06/10/2004
APPLICABLE MODEL:
GESTETNER – DSC332/DSC338
LANIER – LD232C/LD238C
RICOH – AFICIO 2232C/2238C
SAVIN – C3224/C3828
SUBJECT: COLD OFFSET (POOR FUSING)
SYMPTOM:
Cold offset (poor fusing) may occur when all of the following conditions are met:
1. The machine is turned on under low-temperature conditions
2. The weight of the paper loaded in the tray is near the upper limit for plain paper (e.g. 100g/28lb.)
3. Copies are made in B&W mode (185 mm/sec.)
NOTE 1: The offset normally occurs between the second and fifth copy, gradually improving and
disappearing within approximately 15 copies.
NOTE 2: This does not occur in Color mode or with paperweights of 80g/24lb or less.
CAUSE:
The heat distribution across the fusing belt is not uniform while the initial copies are made onto thicker plain
paper in B&W mode (highest processing speed.)
SOLUTION:
FIELD COUNTERMEASURE:
1. SP1-912-2: Change the threshold for enabling low temperature correction from 17
o
C to 22
o
C .
2. SP1-916-1: Enable idling mode (set to a value of 1. )
SP Mode Default Change to
SP1-912-2 17
o
C 22
o
C
SP1-916-1 0: OFF 1: ON See Notes below.
NOTE 3: It is not required to change the idling time (default: 30 sec) for SP1- 916- 2. Please maintain
this setting of 30sec, since a software bug will cause the machine to continue running if the
setting is changed to 40sec or more (the firmware correcting this will be released soon.)
NOTE 4: Enabling Idling Mode causes the warm-up time to increase by 30sec, therefore please advise
customers of this point.
PRODUCTION COUNTERMEASURE:
The firmware will be modified to ensure cold offset does not occur without changing the warm-up time. This
TSB will be reissued when the released date has been confirmed.
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