4511-xxx
Diagnostics—all models
2-111
Printhead service check
Transfer roll service check
FRU Action
Printhead
Unplug the printer.
Disconnect the printhead cables from J13 and
J14 on the controller card.
Turn the printer on.
On the controller card, verify +24 V dc on pin 5
at J13 and +5 V dc on pin 7 at J14.
Verify grounds on pin 4 at J13 and on pins 2, 6,
and 8 at J14.
• If voltages or grounds are incorrect, check the
controller card. See “Controller card service
check” on page 2-82 for more information.
• If voltages are correct, replace the printhead
(comes with cables).
FRU Action
Transfer roll
Check transfer roll area for debris, and clean
area as necessary.
Verify continuity between the spring below the
left side bearing and the transfer roll shaft.
Verify continuity in the spring and the cable
connection on the LVPS/HVPS.
Inspect the roll for signs of wear or damage and
replace if necessary.
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