Xerox 2135N - Phaser Color Laser Printer, Quick Reference Manual

Page: 60 / 199

Service Guide 47
Printing and print quality problems
Light or blurred images
1. Is the correct paper being used
in the printer?
2.
Are the toner cartridges low?
3. Are any of the imaging drum
reaching their end-of-life?
Replace them if they are.
4. Do the imaging drum units
make good connection to their
power terminals?
5. Are the LED heads dirty? Clean
each head with a clean,
alcohol-soaked, lint-free cloth.
6.
Are the LED heads wiring
harnesses undamaged and
properly seated?
7.
Is +3.8V (red wire) supplied to
Pin 3 of each LED head
assembly? If yes, replace the
LED head assembly.
8. Is +3.8 V supplied to the
POWER connector pins 1, 2, 3,
4, 5, 6, 7 and 8 on the junction board or at the 16-pin interconnect near the
top cover hinge (under the top shield plate). Inspect the junction board’s
wiring connectors. If the voltage is not OK, replace the low-voltage power
supply.
9. If +32 volts supplied to the POWER connector pins 7, 8, 9 and 10 on the
engine controller board? Inspect the wiring harnesses or replace the
low-voltage power supply.
10. Is +32V supplied to the HVOLT connector Pin 5 of the engine board. If not
replace the engine board. (Transfer the old engine controller board’s
EEPROM (lower-right corner of board) to the new engine controller board.)
11. Inspect the high-voltage wiring harnesses.
12. Replace the high-voltage power supply.
Required tools
■
#1 Phillips screwdriver
■
Conductive grease
■
Volt-ohm-meter (VOM)
■
Ruler