200.21, 200.28, And 200.29 Paper Jam Service Check - Lexmark C78x Service Manual

5061

200.21, 200.28, and 200.29 paper jam service check

Either the transparency sensor (200.21), the S2 sensor (200.28), or the narrow media sensor (200.29) is
dislodged or damaged.
Note: See "Printer sensors" on page
Step Actions and questions
1 Check the sensor and flag.
1. Turn the printer off.
2. Remove all four toner cartridges.
3. Remove the image transfer unit. See
assembly removal" on page
Is the sensor flag or sensor obstructed by paper
debris?
2 Replace the image transfer unit, the cartridges, and
turn the printer on.
Does the Ready status appear and does paper print?
3 Perform the
Do all the sensors pass the test?
4 Is the inner deflector out of place, causing sensor flag
to bind?
5 Are the sensors connectors fully seated?
2-32
Service Manual
5-3.
• A—Narrow media sensor (200.29 paper jam)
• B—Transparency sensor (200.21 paper jam)
• C—S2 sensor (200.28 paper jam)
"BASE SENSOR TEST" on page
Yes
Remove the
paper or debris,
and go to step 2.
"ITU
4-49.
Go to step 3
3-24. Problem resolved
Install inner
deflector
properly.
Go to step 6
No
Go to step 3
Go to step 4
Replace the
faulty sensor.
See "S2/narrow
media/
transparency/
multipurpose
feeder sensors
removal" on
page 4-89.
Go to step 4.
Go to step 5
Reseat the
sensor
connector.