User`s guide

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Flowcharts and Tables Troubleshooting
Table 2. All LEDs Are Off After Printer Warmup
Step Check Result Action
1 Are the top cover and
fuser door closed?
No Close them completely, and confirm
that the plastic tab actuators on the
doors are intact. No LEDs illuminate if
either door is open.
2 Remove the rear panel
and I/O shield. Is the sta-
tus panel cable securely
connected to J204 on the
DC controller board?
No Secure the cable.
3 Can you print despite the
fact no LEDs illuminate?
Yes Check connection between the status
panel and the DC controller board. If
the connections are secure, replace
the status panel.
4 Place probes between
J208-2 (GND) and J208-3
(PSNS) on the DC control-
ler board. Does the volt-
age rise to 5 V as you
open the fuser door?
No Replace the delivery/interlock
assembly.
5 Place probes between
J201-7 (+5 V) and J201-1
(GND) on the DC control-
ler board. Switch on the
printer. Does the voltage
measure 5 V?
No Replace the DC controller board.
6 Press the top cover inter-
lock leaf spring. Do you
hear the clicking sound of
a microswitch when you
press the spring?
No Confirm that the black plastic actuator
is in place behind the top of the pickup
controller board.
7 Remove the paper pickup
block and maintain pickup
connectivity. Place
probes between J601-11
(GND) and J601-7 (+5 V)
on the solder side of the
pickup controller board.
Does the voltage measure
5 V?
Yes
No
Replace the pickup controller board.
Replace the DC controller-board-to-
pickup-controller-board cable.