Lexmark C734dn - Page 170

2-134 Service Manual
5026
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4
Reseat the JHVPS connector.
Does this fix the problem?
Problem solved. Go to step 5.
5
Replace the HVPS. See “High-voltage
power supply (HVPS) removal” on
page 4-108.
Does this fix the problem?
Problem solved. Go to step 6.
6
Clean the printhead.
Does this fix the problem?
Problem solved. Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-135.
Step Questions / actions Yes No
1 Is all the packing material for the
photoconductor unit in question removed?
Go to step 2. Remove the packing
material.
2
Replace the photoconductor unit for the color
in question.
Does this fix the problem?
Problem solved. Go to step 3.
3
4
Enter the Diagnostics mode (turn off the
printer, press and hold and . and turn on
the printer). Perform the appropriate cartridge
drive motor test for the missing color. See
“General motor tests procedures” on
page 3-9.
Did the motor run?
Go to step 5. Replace the EP drive
assembly. See
“Electrophotographic
(EP) drive assembly
removal” on page 4-82.
Step Questions / actions Yes No