Specifications

3
Flowcharts and TablesTroubleshooting
Paper-Jam LED Lights But No Jam Has Occurred (Continued)
Step Check Result Action
6 Prepare the printer for
troubleshooting as
described in
“Troubleshooting
Preparation.” Disconnect
connector P111 from the
high-voltage power supply
and connector P16 from the
DC controller board.
Connect a multimeter
between P16-4 (PULLUP 5
V) and P16-5 (GND) on the
DC controller board. Does
the voltage measure +5
VDC when you switch on
the power?
No Go to Step 9.
7 Switch off the printer and
reconnect connector P16
to the DC controller board.
Connect a multimeter
between connector P16-6
(PregReg) and P16-5
(GND) on the DC controller
board. Initiate a service test
page. Does the voltage
drop from +5 VDC to 0 VDC
when the paper passes the
paper registration sensor?
No Go to Step 9.
8 Switch off the printer.
Connect a multimeter
between connector P16-3
(EXIT) and P16-2 (GND).
Switch on the printer and
manually actuate the paper
delivery sensor by inserting
a sheet of paper between
the sensor arms.
Does the voltage drop from
+5 VDC to 0 VDC when you
remove the paper from the
sensor?
No Replace the paper delivery sensor. If
the problem persists, replace the
delivery sensor cable.