Ricoh pro c901 - RTB 79: SC36 x (Low toner density), Low image density, Breakage of the sub-hopper shaft

T echnical B ulletin PAGE: 1/2
Model: Aries-P1.5 Date: 20-Nov-12 No.: RM077079
Subject: Preventing SC36x (Low toner density) Prepared by: T. Miyamoto
From: 1st PP Tech Service Sec., PP Tech Service Dept.,
Classification:
Troubleshooting
Mechanical
Paper path
Part information
Electrical
Transmit/receive
Action required
Service manual revision
Retrofit information
Product Safety Other ( ) Tier 2
SYMPTOM
SC36x (Low toner density), Low image density, Breakage of the sub-hopper shaft
CAUSE
Toner supply from the sub-hopper to the development unit is obstructed by toner clumps
that form in the path connecting the two components (red circle in Photo 1), and generates
excess load on the sub-hopper shaft with a possibility of breaking the shaft (Photo 2).
Photo 1
Photo 2