Diagnostic information 2-25
5025-2xx, 4xx
925.01—Fan error service check
930.xx–935.xx—Printhead errors service check
Step Questions / actions Yes No
1 Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-11. Check the fan cable at JFAN1 for
the following values:
Are the measured values correct?
Replace the top cover
(which includes the fan).
See “Top cover assembly
removal” on page 4-12.
Replace the controller
board. See “Controller
board removal” on
page 4-19.
Step Questions / actions Yes No
1 Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-11. Check the cables connected at
JMIRR1 and JPH1 on the controller board.
Check for damage.
Are the cables damaged?
Replace the printhead. See
“Printhead removal” on
page 4-49.
Go to step 2.
2
Turn the printer on, and verify the following
values at JMIRR1:
Are the values approximately correct?
Replace the printhead. See
“Printhead removal” on
page 4-49.
Replace the controller
board. See “Controller
board removal” on
page 4-19.
JFAN1
Pin Value
1 +3.3 V dc
2 Ground
3 0 (fan off)
JMIRR1
Pin Value
2 +3.3 V dc
4 Ground
5+24 V dc
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