EN Chapter 7 Troubleshooting 231
Table 42. Image defects
Problem Cause Solution
Black page The high-voltage power supply
connections are contaminated.
Clean the high-voltage power
supply terminals. (See “Engine
controller board layout,” figure
105 on page 254.) Also clean the
high-voltage springs where they
contact the toner cartridge.
The high-voltage power supply is
installed improperly.
If the high-voltage power supply
has been removed and replaced,
it might not be seated properly.
Remove the engine controller
board and check the connectors
for damage. Reseat the engine
controller board, being certain to
fully seat the connectors.
Defective primary charging roller. Replace the toner cartridge.
The laser drive circuitry is
damaged on the engine controller
board so that the laser is always
on.
Replace the laser scanner
assembly and engine controller
board, followed by the formatter, if
necessary.
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