NEC Super Script 4400, Maintenance Manual

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148 SuperScript 4400 — Maintenance Guide
7.3.3 Optical Unit (Scanner Motor inclusive)
Tools
Phillips Screwdriver #1, #2
Disassembly Procedures
1. Remove the toner modules.
2. Remove the photoconductor belt module.
3. Remove the cover 'C'. Cover 'C' is secured by the
plastic nubs and hole at three locations in the front
side and rear.
a. Release the fixing of three locations (three holes at
the rear side).
b. Pulling the cover C toward you, release the fixing of
front side lock.
4. Remove the cover 'C' from the printer.
5. Remove the set screw ST3 6 (3 pcs.) of optical unit.
6. Disconnect all the harness connector connected
with the optical unit.
7. Remove the optical unit from the printer.
Assembly Procedures
1. Having a new optical unit align the locating boss,
install the optical unit into the printer base.
2. After the above , follow exactly the reverse order of
disassembling procedures.
WARNING!
There is a class b laser within the
optical unit. Do not attempt to disassemble the laser.
Optical unit is replaced as a whole unit. No
adjustment is required to the replaced optical unit.
Confirm all the covers have been installed prior to
any test run or operation in order to prevent any
laser radiation from occurring.
Holes
Interlock
Optical Unit
Front Cover Unit
Cover C
Laser WARNING Label