Service manual

ManualsBrandsScan-Graphics ManualsPrint & ScanCF500/44

7020

Background, streaks, toner misting, and/or excessive toner build up in the recycler unit.DESCRIPTION: SOLUTION ID:

95303

SOLUTION:

CAUSE: Failed toner recycling auger assembly attached to the rear of the drum carriage and/or

insufficient sealing of the developing unit causing toner misting onto the charging corona unit.

SOLUTION: Install the following:

1. Toner Packing Countermeasure Kit (p/n 26NA-K040FOC).

Note: Technical Bulletin 9A indicates that only 4 mylars are to be removed from collect cover/C.

This is incorrect, remove ALL mylars from collect cover/C.

2. Charging Corona Soilage Countermeasure Kit 1 (p/n 26NA-K010FOC) and Kit 2 (p/n

26NA-K020FOC).

3. Due to timing changes in M1 (Main motor) it is critical that level 32 System firmware and level

31 Image firmware or higher be installed when performing this modification.

Notes:

1. Please refer to [[7020/7025/7030/7035 Technical bulletin # 9 (MODIFICATION KITS)| URL

http://techweb.konicabt.com/tpm/media/7020-25-30-35-tb09a.pdf]] for the complete installation

procedures and for the proper parts ordering procedures. To view this PDF hyperlink, Acrobat*

Reader must be installed. Acrobat Reader can be downloaded for free from the Adobe* Web site

at: [[http://www.adobe.com/products/acrobat/readstep2.html| URL

http://www.adobe.com/products/acrobat/readstep2.html]]

2. Be sure to reset drum and developer/PM counters when either is replaced.

a. Drum counters can be reset in both 36 mode (8. COUNTER CLEAR) and 25 mode fixed parts

counter (4. PARTS COUNTER).

b. When developer is replaced both PM counter [25 mode (2. PM COUNT/CYCLE)] and

developer fixed parts counter [25 mode (4. PARTS COUNTER)] should be reset.

3. To help alleviate unnecessary copy quality problems, instruct customer to pull both the small

green corona cleaner and the write unit slit glass cleaner several times whenever toner is replaced.

CAUTION: The L-detection adjustment must never be performed on used developer. L-detection

adjustment must only be performed after developer is replaced and before any copies are made.

Developer will overtone if L-detect is performed more than once on the same developer or if copies

are made prior to performing L-detect on new developer.

4. If black lines or streaking continue after installing Technical bulletin # 9 (MODIFICATION KITS),

clean or replace the Charge wire (p/n 26NA25060) and Charging control plate (p/n 26NA25160) as

necessary.

*[[Trademark ownership information| FILE V:\TEXT\TRADEMRK.TXT NEW]]

USAGE:

772

DF314, intermittent line(s) on copies from lead-to-trail.DESCRIPTION: SOLUTION ID:

91308

SOLUTION:

CAUSE: Paper dust, white out, etc. is being deposited and adhering to the RADF original slit glass

(p/n 26NA61131). This will cause a black line to occur, in a lead-to-trail direction, when copying

from the RADF.

SOLUTION: To help minimize this problem, perform the following:

1. Replace the original slit glass (p/n 26NA61131) with the new style 7145 original slit glass (p/n

40LA-6280). The 7145 original slit glass (p/n 40LA-6280) has a fluorine coating on the surface of

the glass to help prevent debris from adhering to the glass. When installing the original slit glass

(p/n 40LA-6280), ensure that the black dot mark is on the right rear side.

2. Thoroughly clean the original slit glass (p/n 26NA61131), located to the left of the original scale

plate, with a clean soft cloth dampened slightly with water, or an anti-static cleaner.

3. Apply a couple of drops of Rain-X* and rub into the slit glass, this may reduce the occurrence of

foreign debris sticking to the slit glass.

4. Check the RADF height adjustment and adjust as necessary. The procedure can be found on

either page E-2 of the DF314 installation instructions or in the 7020/7025/7030/7035 service

manual (3/2001) page 4-88.

a. The DF314 reading roller (p/n 13GL45520) may apply too much pressure to the slit glass if

the DF314 height is adjusted too high. This added pressure might contribute to debris adhering to

the slit glass.

b. After performing the height adjustment, it may be beneficial to re-adjust the height positioning

screw approximately 1/2 to 3/4 of turn counterclockwise. The position of the white pointer should

slide down to the left of center slightly; this will relieve additional pressure away from the slit glass

by the reading roller.

CAUTION: Adjusting the RADF height too high may cause RADF jamming at the slit glass area or

blurred copies.

5. Adjusting the READ POINT ADJUSTMENT, in the 36 mode, may also help to minimize this

problem.

a. The READ POINT ADJUSTMENT moves the first mirror to a different home position and

consequently a different position under the slit or scan glass. By moving the read point of the first

mirror and adjusting RESTART TIMING, you can effectively move the read point of the scan glass

so it is not directly under the DF314 reading roller. This is the area that appears to be the most

susceptible to slit glass contamination.

b. The READ POINT ADJUSTMENT procedure can be found in the 7020/7025/7030/7035

USAGE:

May 2005