Ricoh A095, Service Manual

Page: 296 / 680

Rev. 6/13/97
A095/A096/A097 FSM 5-137
A095/A096/A097 - Service Tips: Fusing Unit
Figure 3.
Flat spot in the
Pressure Roller
may occur on machines
that sit idle for extended
periods of time
Figure 4.
A097
Inspect Bushings
(AA082603) at PM interval
.
Not available as an assembly on A096
Figure 2.
Install Thermistor
Film (A0964209)
Ensure silicone oil is applied
Figure 1.
Thermistor
placement in
relation to heat
curve.
Figure 5.
A097 confirm the
AC Drive Board
part number
silk
screened on the board
•
FYI:
We have received several Technical Alerts that suggested repositioning the
Thermistor away from the center of the Hot Roller (to avoid toner build up on the Thermistor).
The Thermistor must be placed near the center of the Hot Roller. This is due to the actual
temperature characteristics of the Hot Roller. The Thermistor must monitor the Hot Roller at
its hottest point (see Figure 1. above). This design avoids temperature overshoot or
undershoot common with other fuser designs.
(7000 series “Please wait warming up” during
long copy runs
)
Repositioning the Thermistor violates UL standards. Any fusing unit
modified in this way, must be restored to manufacturers standards immediately
•
To avoid toner build up on the Thermistor: Figure 2. Install the Thermistor Film
(A0964209) and apply a thin film of silicone oil. At every EM call inspect /clean or replace the
Thermistor Film.
•
Pressure Roller flat spot: Figure 3. If a pressure roller flat spot occurs, enter SP
Adjustments page 1. And select the 10 minute fusing idling period. This should eliminate
the flat spot.
This may occur on low use machines.
•
A097: Figure 4. FT6665 please inspect the bushings in the pressure roller cleaning roller
assembly at the PM interval for wear. Replace as necessary.
This is not available as an
assembly, parts must be ordered individually. Preliminary information from RCL indicates
that this assembly will be improved.
•
Figure 5. When experiencing temperature related problems on an FT6665, confirm that the
part number silk screened on the AC Drive Board has a A097 prefix
see TSB 6645/55/65 -
54 Update 6