2-16 Service Manual
2580+, 2581+, 2590+, 2591+
Power service check
Step FRU Action
1 Power supply If the carrier does not move to the left after turning the printer off and then back
on, be sure the line cord voltage to the power supply is correct and the power
supply outputs are +40 V dc at J15-1, +40 V dc at J15-2 and +5 V dc at J15-6.
If the voltages are incorrect:
• Check the internal fuse before replacing the power supply. Generally if F1 is
blown, it is due to a short-circuit in the printhead; replace the printhead and
the fuse before turning the power on again.
• Be sure the power supply cable from the power supply to the logic board is
not damaged and is correctly installed.
2 Operator panel
Operator panel cable
If there is still a Power LED problem, check the operator panel cable continuity
and replace the cable or the operator panel.
3 Carrier motor Disconnect the carrier motor from logic board J2, and turn the printer off and
then back on. If the Power LED lights correctly only with the carrier motor
disconnected, replace the carrier motor.
4 Paper feed motor Disconnect the paper feed motor from logic board J19, and turn the printer off
and then back on. If the Power LED lights correctly only with the paper feed
motor disconnected, replace the paper feed motor.
5 Printhead
Printhead cables
Disconnect the printhead cable from the logic board, and turn the printer on. If
the Power LED lights correctly only with the printhead cables disconnected from
the logic board, there is a short-circuit in the printhead or printhead cables.
Disconnect the printhead cable from the logic board, and be sure none of the
leads on the cable are shorted to ground.
6 Logic board If no problem is found with the other components, but the power problem still
remains, replace the logic board and reset the bidirectional print adjustment. Go
to “Bidirectional print adjustment” on page 4-3.
CAUTION
Always unplug the power cord before doing any continuity measurement.
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