Kyocera TASKalfa 2551ci, Service Manual

Page: 431 / 756

2NP
1-5-20
1-5-9 Optical section
(1) Detaching and refitting the laser scanner unit
Procedures
1. Remove the cassette.
(See page 1-5-8)
2. Remove the rear cover and left lower
cover.(See page 1-5-4,1-5-5)
3. Remove two connectors.
4. Remove four screws and then remove
the laser scanner unit assy by pulling it
forwards.
5. Release the clamp and then remove the
FFC from the connector.
6. Remove two screws.
7. Remove the pin and spring and then
remove the unit holder Y.
8. Lift the laser scanner unit Y upwards
and then remove the laser scanner unit
Y (LSU-Y).
9. Similarly, remove the laser scanner unit
C/M/K(LSU-C/M/K).
10. Check or replace the laser scanner unit
and refit all the removed parts.
Figure 1-5-36
*: Wrap an antistatic discharging belt around your wrist to prevent damage to the LSU. Do not touch termi-
nals and FFC contacts in the APC PWB of the LSU.
*: When reconnecting FFCs, be sure to
insert the FFC all the way in with the
FFC connector.This is to avoid a
lengthy servicing due to a possible error
which could cause re-disassembly and
-assembly.
11. When replacing the new LSU, proceed
as follows:
1)When replacing the LSU-K,check and
adjust the assembly frame of LSU
unit. (see page 1-5-21).
When replacing the other LSU (LSU-
Y/C/M),proceed to next step 2.
2)Performs maintenance mode U469
(Auto color registration correction)
(see page 1-3-153).
3)Performs maintenance mode U464
(Calibration) (see page 1-3-148).
4)Performs maintenance mode U410
(Adjusting the halftone automatically)
(see page 1-3-133).
Figure 1-5-37
Screw
Screw
Screw
Screw
Laser scanner
unit assembly
Connectors
Screws
Pin & spring
Clamp
FFC
LSU-Y
Unit holder Y
LSU-C
LSU-K
LSU-M