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Disassembly and Reassembly
Samsung Electronics
Service Manual
5-5
1) Disassembly of the LSU unit
There are no serviceable parts inside the
LSU. Alignment of the mirrors is critical.
Opening the LSU will allow dust into the
laser and significantly reduce print quality.
It is very dangerous to operate or service
a machine with the LSU open or system
interlocks disabled. Exposure to laser
radiation can cause blindness.
2) Disassembly of the ITB unit
Do not disassemble the ITB. The align-
ment of the home sensor is critical and is
set up in the factory on a special jig.
Incorrect re-assembly will cause print
quality degradation.
3) Care of the Toner cartridge
Toner cartridges contain an extremely fine
powder. Please keep toner cartridges
away from children. The toner powder
contained in the toner cartridge may be
harmful and if swallowed you should con-
tact a doctor. Take care not to spill toner -
spillages should be cleaned with a
vacume cleaner and washed in could
water (hot water sets the toner). Do not
touch the developer roller surface as cont-
amination will reduce print quality. Take
care not to damage the roller's surface
when installing or removing a toner car-
tridge.
4) Disassembly of DEVE drive ass'y
and the main drive ass'y
The alignment of the drive mechanism is
critical and it has been set up in factory
using a jig and a driving gear. It is adjust-
ed for the best gearing alignment. If the
motor is disassembled alignment would
not be maintained and this could cause
operational noise and image problems:
image alignment and toner distribution
may be affected.
5) Disassembly of terminal parts
Do not adjust the variable resistors on the
PBA. They have been already adjusted in
the factory.
6) Disassembly of the fuser unit
- The fuser melts toner onto the paper at
a high temperature: therefore, you need
to take special care not to get burned by
a hot fuser
. When removing the fuser
from a set that has recently been operat-
ing you need to take extra care.
- Do not touch an AC line (Copper con-
tact) on a main frame even after remov-
ing the fuser.
5.3 Information Related to Disassembly and Assembly.
5.3.1 Special service parts
Never disassemble or adjust the items mentioned, a stock of these items should be maintained.
7) When you replace ITB Unit,
be careful with following things;
- When you replace ITB Unit, carefully handle
with ITB Belt. If not, it harms ITB Belt.
- Do not turn ITB Belt back and forth.
If not, waste toner powder would be leaked.
- When shutter is working on an outlet of
waste toner, be careful that waste toner
powder would be leaked