Ricoh Pro C901 Technical Bulletin page 460

Reissued:21-Apr-14
Model:
Aries-P1.5/C1.5
Step 2. Set the drum and the drum cleaning unit, and install the developer unit in the
mainframe.
Scratches on the drum should correspond to the toner adhesion confirmed on the
development rollers. Replace with a new drum, if the drum is scratched.
Notes on Fastening the Drum Knob (Reference P.4 "2. Correct Procedures for
Fastening the Drum Knob")
 Make sure the drum cleaning unit is not installed when setting the drum and fastening
the knob.
 Turn the drum knob clockwise and confirm complete fastening.
 DO NOT 'loosen  fasten' the drum knob after installing the cleaning unit. Doing so
will reduce the PG at the front side.
Step 3. Pour in the developer mixture and execute Process Control (SP 3-820-002
Step 4. Print out 2 full-bleed solids (on A4/LT-Portrait) for the affected color.
Step 5. Check if the density differs between the front and rear sides of the full-bleed
solid.
 If density differs between the front and rear sides, do Step 6.
Step 6. Check if the development rollers are adhered with toner after the test print.
6-1. Print 1000 pages of low pixel density images; approx. 5% density.
6-2. Pull out the development unit, and check for any scratches on the drum surface.
6-3. Remove the drum cleaning unit and the drum, and check for any toner adhesion on
the development rollers.
If the development rollers are not adhered with toner:
a. And if the front and rear sides appear in the same density, the drum has no problem and
can be used.
 Toner adhesion is probably caused by 'incorrect fastening of the drum knob'.
b. And if the front side appears denser than the rear, print another 4000 pages. If toner
adhesion does not recur, the drum has no problem and can be used.
 Toner adhesion is probably caused by 'incorrect fastening of the drum knob'.
If the development rollers are adhered with toner, PG may be exceeding the specification.
* RCL requests you to send the affected development unit to RPS-Katsuta for
investigation.
echnical
T B
ulletin
Date:
10-Mar-14
PAGE: 8/75
No.:
RM077107b
）
.