Technical Bulletin
No. RTB-006
SUBJECT: Platinum Corona Wire
DATE: Apr. 15, ’91
PAGE: 1 of 2
PREPARED BY: H. Kobayashi
CHECKED BY:
FROM:Copier Technical Support Section
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
Revision of service manual
Information only
Other
MODEL: F40
The following platinum corona wires have been registered as service parts. The tungsten
corona wires are currently being installed on the assembly line, but they may be replaced
in the field with the platinum corona wires, if desired.
Platinum
corona P/N
Description
Current Tungsten Corona P/N
# 52199540
Corona Wire (1 pc/set)
# 52199101
# A0079540
Main Corona Wire (1 pc/set)
# A0089001
# A0079541
PQC Corona Wire (1 pc/set)
# A0079002
# A0079542
Transfer Corona Wire (1 pc/set)
# A0079003
The platinum and the tungsten corona wires are fairly similar in performance and handling;
however, there are the following differences:
Point 1
During the copy cycle, less foreign matter (toner, dust, gas) will build up on the surface of
a platinum corona wire than on a tungsten wire. Consequently, platinum corona wires do
not need to be cleaned as often to maintain copy quality. This is true for both these
platinum corona wires and the third vendor’s platinum corona wires.
Point 2
Negative charges cause portions of the surface of a platinum corona wire to break off,
affecting the copy image and requiring replacement of the wire. A platinum wire cannot be
used as a negative charge corona. (A tungsten wire can be used as a negative charge
corona wire.) This is true for both these platinum corona wires and the third vendor’s
platinum corona wires.
