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Model:
Model U-P1
2. CAUSE
The lubricant applied to the OPC belt gets inside the black development unit via the
development roller, causing the friction level on the roller surface to decrease. This makes
it more difficult for the toner to be transferred onto the roller surface, causing the image to
gradually get lighter.
Note: The symptom temporarily subsides when the toner cartridge is replaced and new
toner is supplied to the hopper (concentration of lubricant in the unit is minimized).
However it will recur when the above process repeats.
3. SOLUTION
1. When the symptom is reported:
Please perform the following update and replacements, which will minimize the
chances of symptom occurrence. The modified firmware reduces the amount of
lubrication used on the OPC, which in effect minimizes the amount of lubrication that
can get inside the development unit and toner cartridge.
1) Update to the following modified firmware
Note: These versions were applied from April '03 production (S/N list below).
• Main Unit Controller ver2.27 or later.
• BCU ver1.42 or later
After updating the firmware, input the following default values manually.
SP No.
2-938-001 (New SP)
2-941-001
3-920-001
3-921-001
3-921-002
2) Replace the black development unit.
3) Replace the black toner cartridge.
Note: It is necessary to replace the toner cartridge since the lubricant also gets into
the cartridge.
2. At EM visits made for another reason
Update to the software listed above.
T
B
echnical
Description
OPC Reverse Interval
OPC Lubricant Time – Interrupt
Lubrication Cleaning Time
Lubricant Clutch OFF: 1C
Lubricant Clutch OFF: 2C/3C/4C
ulletin
Date:
17-Jun-03
PAGE: 2/3
No.:
RG071007
Value
10
14
50
6
6
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