Sharp FO-DC635U, Service Manual

Page: 4 / 166

FO-DC635U
1 – 1
FO-DC635U
Service Manual
CHAPTER 1.
GENERAL DESCRIPTION
[1] Caution
1. Laser caution
This laser printer is a class 1 laser product that complies with 21CFR 1040.10 and 1040.11 of the CDRH or IEC60825-1 standard. This means that
this machine does not produce a hazardous laser radiation. The use of controls, adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
This laser radiation is not a danger to the skin, but when an exact focusing of the laser beam is achieved on the eyes retina, there is danger of spot
damage to the retina.
The following cautions must be observed to avoid exposure of the laser beam to your eyes at the time of servicing.
1) When a problem in the laser optical unit has occurred, the whole optical unit must be exchanged as a unit, not an individual part.
2) Do not look into the machine with the main switch turned on after removing the toner/developer unit and drum cartridge.
3) Do not look into the laser beam exposure slit of the laser optical unit with the connector connected when removing and installing the optical sys-
tem.
4) The cover of Laser Printer Unit contains the safety interlock switch.
Do not defeat the safety interlock by inserting wedges or other items into the switch slot.
2. Life of consumable
Laser Wave Length : 770 nm -810 nm
Laser Pulse Times : 51.3 ns
Laser Output Power Max : 5 mW
Section Part Estimated Life Replaced by
Toner cartridge Replacement cartridge
(FO-50ND) 6,000 prints (at Letter/4%
chart) User
Drum cartridge Replacement cartridge (FO-47DR) 20,000 prints (at Letter/4%
chart) User
Paper feed Transfer roller (Refer to the P/G No. 10-8)
(0KW4127410302) 50,000 prints Service Engineer
Fusing unit Fusing unit (Refer to the P/G No. 9-14)
(0KW4127036001) 50,000 prints Service Engineer
Paper transport Paper transfer roller (Refer to the P/G No. 8-6)
(0KW4127300101) Cleaning as needed ———————
Unit FO-DC635 5 years or 75,000 prints of
early either ———————