C7085-90921 Chapter 7 Troubleshooting 219
3. Refer to the wiring diagram and verify all connections
(J103 of the DC controller PCB and to SW5). Verify they
are firmly seated.
Verify that both the drum and ITB drawers are firmly closed;
closing these drawers also closes SW4 (see Figure 7-31).
Note Closing the rear door, the drum drawer, and the ITB drawers closes SW4 and SW5. When either of these
switches is open, the +24 V supply is disabled. This safety feature protects the operator from any high
voltages.
CLOSE TOP COVER
Description:
SW2 (refer to Figure 7-29) indicates whether or not the
printer’s toner access cover is closed. When the toner
access cover is closed, a lever is pushed down. This in turn
rotates a pivot forward, opening the top cover switch (SW2).
Action:
1. Close the top cover.
2. If the message persists, remove the printer’s top
assembly cover and verify all mechanical linkages
associated with SW2 (see Figure 7-29).
3. Verify that the connector on J1003 of the DC controller
PCB is firmly seated.
CLOSE UPPER FRONT DRAWER
Description:
The drawer that holds the imaging drum (the drum drawer) is
open. Switch SW3 (refer to Figure 7-31) indicates that the
drawer is open. When the drawer is closed, a plastic
protrusion on the lower left corner of the drawer pivots an
arm that allows SW3 to toggle to the open position.
Action:
1. Open the drawer and firmly push the drawer closed
using one hand in the middle of the drawer.
2. If the message persists, remove the printer’s left-side
cover and inspect the mechanical linkage that closes
SW3.
3. Refer to the wiring diagram and verify the wiring. The
two-wire connector should be firmly seated to SW3 and
the wiring harness should be firmly seated to connector
J1003 of the DC controller PCB.
4. If the message persists, use an ohmmeter to verify
functionality of SW3.
5. Verify FM3 (in the front of the Imaging drum drawer) is
functioning properly. The fan con-nects via J77 to J1022
on the DC Controller.
Note Closing the drawer also closes SW4 (the drum drawer switch). When SW4 is open, the +24 V supply is
disabled. This safety feature protects the operator from high voltages when the drum or ITB drawer is
open.
COLD RESET (4500)
-or-
RESTORE FACTORY SETTINGS (4550)
Description:
The cold reset power-up sequence has been entered.
Action:
Most printer variables will reset to their factory default values.
CONTINUOUS PAGE
PRESS CANCEL JOB (4500)
Description:
The printer configuration page is being printed continuously.
Action:
Press [Cancel Job] to terminate continuous configuration
page printing and return the printer to the
READY state.
Note The 4550 has a paper path test that can be run from the Infomraiton menu.
DATA RECEIVED
Description:
The printer has received and processed data and is waiting
for a form feed.
Action:
Press [Cancel Job] and resend the last page of the job
making sure a form feed is sent with it, or press [Go] to feed
a new sheet of media through the printer.
Table 7-2 Alphabetical printer error messages (continued)
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