Blank print
1.
Do the imaging drum units
make good connection to their
power terminals?
2.
Are the LED heads wiring
harnesses undamaged and
properly seated?
3.
Is +3.8V (red wire) supplied to
Pin 3 of each LED head
assembly? If yes, replace the
LED head assembly.
4.
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.
5.
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.
6.
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.)
7.
Inspect the high-voltage wiring harnesses.
8.
Replace the high voltage power supply.
Service Guide
49