Ricoh 5219 Technical Bulletin FT7060

Technical Bulletin No. RTB-026

SUBJECT: Platinum Corona Wire DATE: Apr. 15, ’91

PAGE: 1 of 2

PREPARED BY: H. Kobayashi
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

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
#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

Revision of service manual
Information only
Other

Description Current Tungsten Corona P/N

FROM:Copier Technical Support Section

MODEL: F20

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.

Technical Bulletin No. RTB-026

SUBJECT: Platinum Corona Wire DATE: Apr. 15, ’91

PAGE: 2 of 2

--When to install the platinum corona wires-

The platinum corona wires do not have to be cleaned as often as the tungsten wires
(point 1). For this reason, the platinum corona wires are most suitable in cases where a
machine is installed in a relatively inaccessible location (far from a service center) and
service calls are difficult to make.

The platinum wires can be installed in the field on the following models:

Model Main Transfer PQC PCC Separation PTC

F20
F21
F22

F30
F31
F33
F34
F40

#52199540 #52199540 #52199540 Negative

charge.
Do not use.

#A0079540 #A0079542 #A0079541 Negative

charge.
Do not use.

Negative
charge.
Do not use.

Negative
charge.
Do not use.

Negative
charge.
Do not use.

Not used.

Note 1
When installing the platinum corona wires, please take the following actions:

1. Clean the corona casings, end blocks, and new platinum wires with damp cloth.

2. Confirm VSG.
Note 2

#A0079540 can also be used as the F90 main corona wire.

--

Technical Bulletin No. RTB-027

SUBJECT: Manual Correction DATE: May 31, ’91

PAGE: 1 of 2

PREPARED BY: M. Kitajima
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Pleases correct your field service manual as follows:
<SECTION 3 REPLACEMENT AND ADJUSTMENT>
Exposure

7. Scanner Drive Wire Replacement

-Installation- (Page 3-9)

Incorrect

13. Set the front and rear second scanner positioning clamps [B].

Correct

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:

F20

13. Unhook the front and rear wire tension springs [C] and remove the wires. Set the first
and second scanner fixing bracket [D] to the first and second scanners and set it
using M4 x 8 screw [E] with a washer.

NOTE: 1) This fixing bracket is a shipping retainer to be removed when installing the

machine.

2) Position the hole [F] of the scanner drive motor bracket to the center of the
long hole [G] of the fixing bracket.

[E]

[D]

[C]

[G]

[F]

Technical Bulletin No. RTB-027

SUBJECT: Manual Correction DATE: May 31, ’91

PAGE: 2 of 2

Incorrect

15. Wrap the two wires side by side 3 times along the grooves of the scanner drive pulley.
NOTE: If the wires are properly wrapped, you will count seven wires on the scanner

drive pulley with the long wire outside of the scanner drive pulley.

25. Remove the front and second scanner positioning clamps.

35. Set the first and second scanner positioning clamps.

Correct

15. Wrap the two wires side by side 2 times along the grooves of the scanner drive pulley.
NOTE: If the wires are properly wrapped, you should see five wires on the scanner drive

pulley, with the long wire on the outside of the scanner drive pulley.

25. Remove the first and second scanner fixing bracket.

35. Set the first and second scanner fixing bracket.