On / Off Switch Automatically Switching To The Off Position Service Check - Lexmark C925 Service Manual

Symptom
• Foggy print
• Black pages
• Blank print
• White spots
• Poor reproduction
• Incorrect color image
registration
• Dirt on back of paper
• Low image density
• White and black lines and
bands
Evenly spaced marks on the
paper, or a single mark in the
same place on every page.
Poor fusing.
Toner scatter on front or back of
paper.
Paper will not feed from MPF.
Waste toner bottle missing.
ON / OFF switch automatically
switching to the Off position.
Machine shutting down.

ON / OFF switch automatically switching to the Off position service check

Note: If the machine turns off a few seconds after a POR, follow the procedure below. The automatic shut
down of the printer is a safety feature implemented to avoid fire, or damage to the printer. This is a feature
of the device.
Step Action and questions
1 POR the printer a couple times. Does the printer turn
off a few seconds after the POR?
Note: When restarting the machine, you should see
the power switch physically move to the off position
when the machine turns off.
2 Replace the fuser, power supply, and printhead
controller board. Does this fix the problem?
Action
Go to "Print quality issues" on page
See "Repeating marks" on page
Go to "121.05 Fuser - fuser heater error" on page
Check the following:
• Excessive toner buildup on the transfer belt. Clean off the toner, and
run a test print.
• Transfer belt assembly
• Transfer belt toner waste bottle
• Transfer belt separation fingers
• Fuser separation pawl
Be sure you have paper in the MPF.
Check the paper size and type. Does it match the paper setting on the
printer?
Be sure the MPF paper present sensor connector (CN16) is connected to
the CK1 daughter board. If the paper still does not feed, go to
path service checks" on page
See "Waste toner bottle missing service check" on page
Go to "ON / OFF switch automatically switching to the Off position
service check" on page 2-59.
2-4.
2-7.
2-32.
2-19.
Yes No
Go to step 2. Problem resolved
Problem Contact your
resolved. second level
support
Diagnostic information
5041-030
Previous
Next
Go Back
"Paper
2-68.
2-59