Ricoh Pro C901 Technical Bulletin page 584

Model:
Aries-P1.5/C1.5
Subject:
Double feed is not detected
From:
PP Tech Service Dept., 1st PP Tech Service Sect.
Classification:
SYMPTOM
Blank sheets are mixed in duplex jobs, because double-feed was not detected and the
double-fed sheet was not separated while passing through the PTR, fusing and switchback
units.
Note: The problem tends to occur with Thick 4 or thinner paper that tend to stick
and is less likely to occur with thick paper.
CAUSE
The emitter of the double-feed detection sensor lacks accuracy in the LED output level.
SOLUTION
The LED output level of the double-feed detection sensor was optimized, and a new
service part containing the emitter, receiver and harness was registered with
p/n: M0777405. If the problem occurs, replace with the new sensor.
Note: Make sure to replace the emitter, receiver and harness as a set.
How to replace the double-feed detection sensor
1. Open the right front door.
2. Turn the lock lever [A] of the registration unit counterclockwise and pull out the unit.
echnical
T
Troubleshooting
Mechanical
Paper path
Product Safety
ulletin
B
Date:
22-Nov-16
Prepared by:
Part information
Electrical
Transmit/receive
Other ( )
PAGE: 1/3
No.:
RM077117
Hiroaki H Matsui
Action required
Service manual revision
Retrofit information
Tier 2