Xerox 3050 Service Manual page 309

CQ 2 Background Banding1 Streaks
Probable Cause
1. Dirty transport platen, platen, exposure
lamp, or lens.
I
2a. On copiers (WI 0 Tag/ MOD 30): Ensure
that the Erase Lamp illuminates.
I
2b. On copiers (Wl Tag/ MOD 30): Ensure that
the Erase LEDs illuminate.
3. Contamination on corotron(s).
4. The cleaner blade is not cleaning the
photoreceptor drum correctly.
Corrective Action
1. Clean the transport platen and the platen
with Antistatic Cleaner.
If required, apply a small amount of Film
Remover (USO) onto a towel t o remove
excess contaminants from the lens and
exposure lamp. Then, apply Antistatic
Cleaner t o the towel and wipe the lens and
exposure lamp.
I
2 a. Refer t o CQ 30 i f the Erase Lamp i s not
illuminating.
2 b. Refer t o CQ 31
if
the Erase LEDs are not
illuminating.
Both configurations: ensure that the
Exposure Lamp is installed correctly (REP
6.1).
Clean, repair, or replace the corotrons and
then perform the Electrostatic Series (ADJ
9.2).
Enter the diagnostic mode and then enter
code [0913]. Press Start and the cleaner
blade solenoid should actuate. If it does
not:
Check the following:
Cleaner blade solenoid adjustment
(ADJ 9.1).
The cleaner blade weight moves
freely (REP 9.4).
The cleaner blade assembly
translates across the photoreceptor
drum.
No wires are interfering with the
cleaner blade weight.
Cleaner auger and belt.
Cleaner plunger moves freely.
(Continued)
121 97
3050 3-25
CQ 2 Background Banding1 Streaks