T
echnical
B
ulletin PAGE: 1/2
Model:
AL-P1
Date:
8-Sep-09
No.:
RG179014
Subject:
Duplex jam or Z-fold jam
Prepared by:
K. Hamada
From:
2nd Tech Support Sec. Service Support Dept.
Classification:
Troubleshooting
Mechanical
Paper path
Part information
Electrical
Transmit/receive
Action required
Service manual revision
Retrofit information
Product Safety Other ( ) Tier 2
This RTB applies only to the Model Al-P1.
SYMPTOM
A duplex jam or Z-fold jam may occur if a duplex print job is performed
Note:
- This symptom has a greater tendency to occur under low-temperature conditions.
- Once the symptom occurs, it will continue to occur.
CAUSE
The motor torque of duplex bypass motors from a specific lot was higher than the
specification maximum. This increased the level of vibration during motor rotation, which
led to resonance when the vibration reached a certain frequency. Eventually, this caused
the motor to disengage and rotate in idle.
SOLUTION
Production line
The following changes were made from June 2009 production of the Model Al-P1
mainframes:
1. Wheels were added to the motor pulley to minimize resonance as a provisional
countermeasure.
2. An extra check was added to further ensure that the motor torque does not exceed
the specification maximum and change to the new parts number as a permanent
countermeasure.
Note: The motor after the above additional check does not contain additional wheel in note
1 above.
Action requirement in the field
Replace the duplex bypass motor with the following new part: P/N B2232745
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