Service Bulletin
SB Number:
Subject:
SB 2H7-054
MK kit with developer unit B (BK toner smudge) and seal set
Creation Date: 16/12/2011
Model: TASKalfa250ci/300ci/400ci/500ci/552ci
Contents
Developer unit B was developed to prevent BK toner smudge on the print-out (Refer to service bulletin 2H7-050 for
further details). Therefore the maintenance kit with the developer unit B has been bundled with the seal set for the
drum unit.
Note
1. Please clean the developer unit within the maintenance cycle.
2. Drive sound may arise due to the developer side coupling at reverse rotation of the developer drive.
Maintenance kit
Old Part No. Old
alternative
1 1702H77US0 072H77US 1702H77US1 072H77U1 MK-855A No. 1 400ci/500ci (120V)
2 1702JZ7US0 072JZ7US 1702JZ7US1 072JZ7U1 MK-865A No. 2 250ci/300ci (120V)
3 1702H78EU0 072H78EU 1702H78EU1 072H78E1 MK-855A No. 1 400ci/500ci (200V)
4 1702JZ8EU0 072JZ8EU 1702JZ8EU1 072JZ8E1 MK-865A No. 2 250ci/300ci (200V)
5 1702KY7US0 072KY7U0 1702KY7US1 072KY7U1 MK-856A No. 3 552ci (120V)
6 1702KY8KL0 072KY8K0 1702KY8KL1 072KY8K1 MK-856A No. 3 552ci (200V)
New Part No. New
alternative
Description Parts tabel
reference
Applicable
models
Parts
No. Old Parts
No.
1 302H793179
2H793179
2 302JZ9319A
2JZ9319A
3 302KY93031
2KY93031
4 ------------ 302H794830
Notes *. Sponge (L), sponge (S), seal and leaet containing the afxing procedure (The leaet contains rmware
upgrade information.)
New Parts
No.
302H793711
2H793711
302JZ93411
2JZ93411
302KY93181
2KY93181
2H794830
Description Q’TY Interchange-
ability
Old New Old New
PARTS DLP K UNIT B 1 1 O O For the DV-855B
PARTS DLP K L UNIT B 1 1 O O For the DV-865B
PARTS DLP K UNIT B 1 1 O O For the DV-856B
PARTS SEAL FRONT DRUM
SET SP
- 1 - O Seal set for the
Remarks
Drum unit *
KMIS Service Department, Kyocera Mita Europe B412 / SB 2H7-054
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Service Bulletin
Classication
Field measure Please note the following when using the latest type of the maintenance kit.
Serial numbers of affected machines
Type Serial number
TASKalfa250ci/300ci/400ci/500ci/552ci November 2011 production.
The above mentioned changes have been applied to machines produced after the above mentioned production date.
Entire stock rework
1. Upgrade the rmware as follows:
• TASKalfa250ci/300ci/400ci/500ci to Firmware pack V12.00 or later.
• TASKalfa552ci to Firmware pack V5.00 or later.
Note
Service call error C7401 (Developer unit K type mismatch error) may occur, when installing the
BK Developer unit B without upgrading the rmware to the above mentioned level.
2. Replace the developer unit with the latest type (BK Developer unit B).
3. Afx the sponges and the seal to the drum unit.
In-eld modication at next visit
In-eld modication by case
X
No modication necessary
KMIS Service Department, Kyocera Mita Europe B412 / SB 2H7-054
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