Xerox 5915, Service Manual

Page: 53 / 146

4-18
Section 4 Disassembly/Assembly/Adjustment
4. Optics
4.3.2 Exposure Lamp Replacement
NOTE :
•
Do not touch the Exposure Lamp glass
tube with your hand. If you touch it,
wipe it with the Drum Cleaner.
•
Take care not to hit the Exposure Lamp
glass tube. It is fragile.
Removal
1. Power off the machine and disconnect the
Power Plug.
2. Open the Platen Cover.
3. Remove the Platen Glass. .......……..... (4.1.1)
4. (Fig. 1): Move the Full-Rate Carriage gently
to the frame cutout and remove the Lamp.
➀ . Remove Screw.
➁
. Remove Front/Rear Side Reflectors.
➂
. Remove Cover.
➃
. Push open Front Contact Plate with your
fingers.
➄ . Remove Lamp.
(Fig. 1)
Installation
1. Perform the installation in the reverse order of
removal.
NOTE :
•
(Fig. 2): Install the Lamp with its
protrusion facing the Reflector
opening approx. 45
°
from the Platen
Glass surface .
(Fig. 2)
2. Key in Diag. Mode [6-7] and check that the
Lamp is on.
3. Perform the Basic Copy Quality Adjustment.
…………………………………………….. (5.1.4)
4.3.3 Optical Skew Adjustment
Purpose To correct the optical image skew in
the Drum axis and paper feed
directions.
NOTE :
•
Ensure that the following are
functioning correctly:
1. Paper is fed properly.
a. There is no difference in skew level between
Trays.
b. There is no difference in skew level between
continuously-made copies.
2. The Regi-Guide(or Gate) and the Platen Glass
are positioned properly.
3. The Full-Rate/Half-Rate Carriages Parallel
Adjustment is properly performed. …...
(4.3.1)
4. There is no difference in skew level between
A4 & A3 ( or between B5 & B4).
* If there is some difference, check to see if
the bottom half of A3(or B4) paper skews due
to the uneven transporting force of the Fuser
owing to a defective P Roll. Replace the P
Roll if necessary.
* The Regi-Roll is deteriorated or worn out.
5. Do not adjust paper skew by this means.
6. After this adjustment, make sure to record in
the Machine History Card that it has been
performed.
Adjustment Flow chart