Ricoh pro c901 - RTB 107 b: Collection of troubleshooting procedures

Technical Bulletin PAGE: 1/75
Reissued:21-Apr-14
Model: Aries-P1.5/C1.5
Date: 10-Mar-14
No.: RM077107b
RTB Reissue
The items in bold italics were corrected or added.
This bulletin is re-edited with the RTBs which were previously issued, and is carried out
when you encounter quality issues.
Table of contents
1. Drum scratches by narrow PG ......................................................... 3
Correct Procedure for Fastening the Drum Knob ........................... 3
Remove toner adhesion on Mg sleeve that causes drum scratch 7
2. SC396 – SC399 .................................................................................... 9
3. Uneven density & Mottled effects ..................................................... 11
Solution flowchart caused by unsmooth surface paper ................. 12
Solution caused by toner degradation ............................................. 20
4. Vertical streaks ................................................................................... 23
Line No.1: White lines caused by ITB ............................................... 25
Line No.2: White lines caused by Dust Shield Glass....................... 26
Line No.3: Color lines caused by Corona Charger .......................... 26
Line No.4: Color lines caused by OPC Drum ................................... 27
Line No.5: White lines caused by Development Unit ...................... 28
(Clogged doctor gap)
5. Horizontal bands ................................................................................ 33
5-1. 40mm wide dark bands appear in 314mm pitch ........................... 33
5-2. Shock jitter and other banding ....................................................... 36
No. 1 Shock-jitter at ITB (PTR originated) ........................................ 38
No. 2 Shock-jitter at OPC (PTR originated) ...................................... 40
No. 3 Shock-jitter at PTR (Fusing unit entrance originated) ........... 46
No. 4 Banding at 85mm TE (Shock at PTR when paper exits PTR) 48
No. 5 1.8mm pitch Banding ................................................................. 49
No. 6 2.5mm pitch Banding ................................................................. 50
No. 7 5mm pitch Banding .................................................................... 51
No. 8 10mm pitch Banding .................................................................. 52
No. 9 56mm pitch Banding .................................................................. 53
No. 10 8mm pitch Banding .................................................................. 53
Subject: Troubleshooting to prevent PQ problem
Prepared by: J. Kobayashi
From: 1st PP Tech Service Sec., PP Tech Service Dept.,
Classification:
Troubleshooting
Mechanical
Paper path
Product Safety
Part information
Electrical
Transmit/receive
Other ( )
Action required
Service manual revision
Retrofit information
Tier 2