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Model:
Model U-P1
Subject:
Gears on the Development Shaft
From:
1st Tech. Support Sec. Service Support Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Other (
SYMPTOM
Almost all white copies & prints, or light image for one or more of YMCK colors.
CAUSE
The gear on development drive shaft shifts due to production line errors. Specifically:
-
Diameter of the gear shafts 0.04mm smaller than specification minimum.
-
Gear rotational torque (0.5kgf) much lower than specification minimum (10kgf)
The gear on the development shaft shifts when the development drive is supplied.
The manufacturer reported that they normally perform surface grinding if dirt or other
materials or scratches are detected on the shaft. This can cause the diameter to be
reduced to below spec minimum.
Development
Drive Shaft
T
B
echnical
Part information
Electrical
Transmit/receive
)
ulletin
Date:
25-Sep-03
Prepared by:
H.K.
Action required
Service manual revision
Retrofit information
Gears
PAGE: 1/2
No.:
RG071009
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