General Cautions; Laser Unit; Used Toner - Gestetner B003 Service Manual

3. REPLACEMENT AND ADJUSTMENT

3.1 GENERAL CAUTIONS

!
CAUTION
To avoid damage to the transfer belt, drum, or development unit when it is
removed or re-installed, never turn off either power switch while electrical
components are active.
!
CAUTION
Turn off the main power switch and unplug the machine before attempting
any of the procedures in this section.

3.1.1 LASER UNIT

1. Do not loosen the screws that secure the LD drive board to the laser diode
casing. Doing so would throw the LD unit out of adjustment.
2. Do not adjust the variable resistors on the LD unit, as they are adjusted in the
factory.
3. The polygon mirror and F-theta lenses are very sensitive to dust. Do not open
the optical housing unit.
4. Do not touch the glass surface of the polygon mirror motor unit with bare
hands.
5. After replacing the LD unit, do the laser beam pitch adjustment. Otherwise, an
SC condition will be generated.

3.1.2 USED TONER

1. Dispose of used toner in accordance with local regulations. Never throw toner
into an open flame, for toner dust may ignite.
SM 3-1
GENERAL CAUTIONS
B003/B004/B006/B007