Iq16 Repeating Bands, Streaks, Spots, And Smears Rap - Xerox Phaser 790 Service Manual

IQ16 Repeating Bands, Streaks, Spots, and Smears RAP

Procedure
Measure the distance between the repeating defects. Locate the distance on the table below.
Perform the indicated repair actions
Table 1 Repeating Defects
Repetition
spacing Component(s) Repair Actions
<4 mm. High Frequency Band- Check/adjust the Developer Roll Spacing (ADJ 9.1).
ing Check for damage or contamination to gears on shafts
of Rotary Motor, Developer Clutch and Dispense
Clutch (PL 10.1).
28 mm. Developer Magnet Roll Check Developer roll bias for floating or shorting out.
Replace Developer Housing(PL 6.2) if required.
44 mm. BCR Roll Replace the Copy/Print Cartridge (PL 5.1).
59 mm. BTR 1 Roll Check for intermittent bias contact to Copy/Print Car-
tridge.
Replace the Copy/Print Cartridge (PL 5.1)
88 mm. BTR 2 Backup Roll Check the BTR 2 Assembly for damage or contamina-
tion. Clean, repair or replace as required (PL 7.1).
BTR 2 Roll Replace the IBT Assembly (PL 7.1).
90 mm. Feed Roll TBD
134 mm. Fuser Heat Roll Remove the Fuser Assembly. Check the rolls for dam-
Fuser Pressure Roll age (nicks, wear, or cuts) or contamination. Clean or
replace as required (PL 8.1).
Check the Fuser Nip (ADJ 10.1).
Go to the 010-701 RAP.
264 mm. Photoreceptor Drum Check the surface of the drum for contamination or
damage. Clean or replace the Copy/Print Cartridge as
required. (PL 5.1)
Initial Issue
Phaser 790/DocuColor 2006
10/00
3-19
Image Quality
IQ16