Ricoh MB RTB Technical Bulletin GEN

Reissued on April 30, 1991

Technical Bulletin No. RTB-003

SUBJECT: Corona Casing Cleaning DATE:April 30,1991

PAGE: 1 of 1

PREPARED BY: M. Kitajima
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

This bulletin gives information on cleaning the corona casing.
CLEANING

Section Action at EM/PM

Casing Clean with water first and with alcohol if

toner still remains.

End Block Clean with a blower brush and then with

alcohol.

EXPLANATION

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL: General

The corona discharge causes ammonium nitrate (NH4NO3) to accumulate on the corona
casing.

NH4NO3 functions as an insulator that reduces the corona discharge to the casing. The
power pack responds by increasing the voltage to the corona wire in order to maintain a
constant current output. (The power pack is a constant current type.)

If toner or some other material accumulates inside the corona end block especially inside
the hook groove [A], it may cause an electrical leak under humid conditions.

NH4NO3 can be easily removed with water but not with alcohol. Toner can be easily
removed with alcohol but not with water.

Therefore, be careful to use the proper cleaning method for each corona unit section.

[A]

Technical Bulletin No. RTB-005

REVISED ON APRIL 15, 1991

SUBJECT: Cleaning Solutions DATE: Dec. 30, ’90

PAGE: 1 of 1

PREPARED BY: T. OKAJIMA
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Based upon the request from the market, three type of cleaning solution have been
registered as service parts. Please order them from the parts center as usual. The details
are as follows:

Revision of service manual
Information only
Other

FROM: International Q.A. Center

MODEL: General

1. EXTERIOR COVER CLEANER (NET. 220 cc)
P/N: A0129530

Purpose: 1) To clean the exterior covers

2) To remove spilt silicone oil from the floor

Procedure: 1) Shake well and spray onto the soiled cover or on the floor.

2) After 10 seconds, wipe cleaner using a soft cloth.

2. DF BELT CLEANER (NET. 180 cc)
P/N: A0129531

Purpose: To clean document feeder belts.
Procedure: 1) Dampen a soft cloth with the cleaner, and wipe the belt.

2) Repeat until the belt is clean.

3. Optics Cleaner (NET. 190 cc)
P/N: A0129532

Purpose: To clean mirrors, lenses, exposure glasses, and paper feed rollers
Procedure: Dampen a soft cloth with the cleaner, and wipe the soiled parts.

CAUTION

Since these three type of cleaning solution are FLAMMABLE, pay attention to the
following caution:

1. Do not spray onto bare skin.

2. Keep away from heat and open flame.

3. Store in a cool place.

4. Keep away from children.

5. Do not dispose of the cleaner by burning it, by applying heat to it, or by any
means that might cause it to ignite.
6 Comply with all local regulations for disposal.