Xerox Phaser 7760 Service Manual page 437

Single Color
1. Inspect the Toner Cartridge for toner clumping.
2. Check the Imaging Units.
All Colors
1. Inspect the paper path.
2. Inspect the Accumulator Belt Cleaner and replace it if necessary.
3. Inspect the Transfer Roller and replace it if necessary.
4. Replace the Fuser.
Revised
Phaser 7760 Color Laser Printer
Repeating Bands, Streaks, Spots, and Smears Appear on Each Print
An identical mark or image appears on each, or every other printed image.
Figure 9 Repeating Bands, Streaks, Spots, and Smears Appear on Each Print
1. Perform Remove Print Smears procedure (Printer Menu > Troubleshooting > Print
Quality Problems > Remove Print Smears). The printer prints 5 blank pages. This func-
tion passes blank sheets of paper through the printer to clean the Fuser Rollers.
2. Perform Repeating Defects Page (Printer Menu > Troubleshooting > Print Quality
Problems > Repeating Defects Page). The printer prints 1 Repeating Defects page. The
Repeating Defects Page contains rulers to help determine the source of the repeating
defects.
Measurement Printer Component
84 mm (3.3 in.) Fuser
94 mm (3.7 in.) Fuser (mark in All Col-
ors) OR
Imaging Unit (mark in
Single Color)
88 mm (3.5 in.) Transfer Roller (2nd
bias)
44 mm (1.7 in.) Imaging Unit
28.3 mm (1.1 in.) Developer Housing
Roller
January 2010
3-13
Table 1 Repeating Defects
Repair Actions
Remove the Fuser Assembly. Check the Heat
Roll for damage (nicks, wear, or cuts) or contam-
ination. Clean or replace as required.
All Colors - Remove the Fuser Assembly.
Check the Heat Roll for damage (nicks, wear, or
cuts) or contamination. Clean or replace as
required.
Single Color - Replace the Drum Cartridge.
Check the 2nd BTR Assembly for damage or
contamination. Clean, repair, or replace as
required. Replace the Transfer Belt.
Replace the Imaging Unit.
Check the Developer Roll Bias for floating or
shorting out. Replace the Developing Housing if
required.
Initial Actions Before Troubleshooting
Image Quality