Specifications

3.3 CHARGE CORONA
1. Clean the corona wire by sliding the corona unit in and out. (The cleaner
pads come into contact with the corona wire when the corona unit is slid
all the way out.) The wire and casing can also be cleaned with alcohol or
water. Do not use sandpaper or a solvent.
2. Do not touch the corona wire with oily hands. Oil stains may cause white
bands on copies.
3. Make sure that the corona wire is correctly positioned between the
cleaner pads and that there is no foreign material (iron filings, etc.) on the
casing.
4. When installing a new corona wire, be sure to place the damper ring in
the front end block. (See Charge Corona Wire Replacement.)
5. When adjusting the drum current, always make sure that the axis of the
drum shoe is aligned with the corona wire.
6. Clean the charge grid with a blower brush (not with a cloth).
7. The corona height should only be adjusted in the following two cases:
a) When the front end block is replaced
b) When the drum charge current is uneven
3.4 OPTICS
1.The following parts are very difficult to adjust. Do not adjust them.
a) 4th/5th Mirror Home Position Sensor
b) Lens Home Position Sensor
c) Lens and 4th/5th Mirror Guide Rails
2. Before removing a sensor bracket to replace a sensor, mark the position
of the bracket. Check the copy image (magnification and focus) to
determine the exact location of the sensor.
3. Do not bend or damage the lens/scanner support plate or the mylar strip.
1 December 1990
4-33