Lexmark C78x User Manual

2-42 Service Manual
5061
Envelope feeder
Before proceeding with this service check, make sure the envelope option is installed correctly.
10
Is the registration home sensor operating correctly? Replace the
following FRUs in
the order shown:
1. HCIT system
board.
2. Feed unit
assembly.
Replace the
following FRUs in
the order shown:
1. Registration
sensor.
2. HCIT system
board.
11
Use the “HCIT system board LED error code table”
on page 2-86.
Does the LED flash 8 times?
Go to step 12 Go to step 14
12
Make sure the pick home sensor cable is installed
correctly to the sensor and to CN6 on the system
board.
Is the cable connected correctly?
Go to step 13 Install the cable
correctly.
13
Is the registration home sensor operating correctly? Replace the
following FRUs in
the order shown:
1. HCIT system
board.
2. Feed unit
assembly.
Replace the
following FRUs in
the order shown:
1. Registration
sensor
2. HCIT system
board.
14
Use the Standalone Feeding Operation Test to
determine where the paper jams. Use the “HCIT
system board LED error code table” on page 2-86
to help isolate problems in the feed unit assembly.
Are you able to determine where the failure is
occurring?
Repair or replace
parts as
necessary.
Replace the feed
unit assembly.
Step Actions and questions Yes No
1 Make sure the envelopes installed in the tray meet
specifications.
Some guidelines that can be used in selection of
envelopes that will minimize the jam rate are:
• Flat envelopes that are not warped or twisted.
• Flexible envelopes that can conform to the paper
path.
• Smooth surface on the envelopes. Rough or ridged
surfaces may cause the envelopes to stick together
in the tray.
• No cotton content, or as little as possible to meet
the user’s needs.
• If the envelopes have a pressure-sensitive
adhesive flap, performance might be improved by
reversing the orientation of the envelope in the tray
and reversing the image in the drive or application.
Are any problems found with the envelopes?
Inform the
customer of the
problems with the
envelopes that
do not meet
specifications.
Go to step 2
Step Actions and questions Yes No

Lexmark C78x Specifications

General

Brand	Lexmark
Model	C78x
Category	Printer
Language	English