Ricoh A172 Service Manual page 523

BULLETIN NUMBER: BULLETIN NUMBER:
BULLETIN NUMBER: BULLETIN NUMBER:
APPLICABLE MODEL APPLICABLE MODEL APPLICABLE MODEL APPLICABLE MODEL: : : :
GESTETNER – 2606E/2606 GESTETNER – 2606E/2606 GESTETNER – 2606E/2606 GESTETNER – 2606E/2606
RICOH – AFICIO 5206/5106 RICOH – AFICIO 5206/5106 RICOH – AFICIO 5206/5106 RICOH – AFICIO 5206/5106
SAVIN – SDC206E/206 SAVIN – SDC206E/206 SAVIN – SDC206E/206 SAVIN – SDC206E/206
SUBJECT: DIRTY BACKGROUND
SYMPTOM:
• Yellow or orange dirty background in leading edge area of the copy
• Magenta dirty background in trailing edge area of the copy.
• Toner film on the drum.
CAUSE:
A high-voltage leak can occur if the harness [A] that runs between the power supply and PCC (pre-cleaning
corona) wire touches the cable clamp bracket
causes the electrical load on the harness to increase, which damages the harness and increases the
leakage. In many cases, the point where the voltage leak occurs may appear white.
This leak can then affect the PCC, which markedly decreases the efficiency of the drum-cleaning unit. In
addition, the charge applied across the drum will not be uniform, leading to density variations in the
developed image that do not appear on the original.
SOLUTION:
Check to see if the PCC high-voltage harness is touching the cable clamp bracket [B]. If it is, position the
harness at least 1mm away from the clamp as shown:
   
2000 RICOH Corporation. All rights reserved.
TECHNICAL SERVICE BULLETIN TECHNICAL SERVICE BULLETIN
TECHNICAL SERVICE BULLETIN TECHNICAL SERVICE BULLETIN
A172/A199 – 030 A172/A199 – 030
A172/A199 – A172/A199 – 030 030
[B]. Although at first the leak is very minimal, over time this
[A]
[B]
Keep the harness 1mm or
more away from the cable
clamp bracket [B].
07/16/2001 07/16/2001
07/16/2001 07/16/2001
CONTROL NO. 051CLR