Paperfeed Electrical Service Check - Lexmark Jetprinter 4079-00 series Service Manual

4079-00X
FRU
3 • Controller
Board
• Operator
Panel

Paperfeed Electrical Service Check

Symptom Explanation
Paper eject problems; an
error code is displayed
when the carriage moves
away from home position
while printing Test Print A.
If the paper lift plate lifts more than once or feeds more than one
sheet of paper, go to the
.
2-36
Use the following chart to determine when the error code appears.
Turn the machine on and carefully observe when the error code
appears, then go to the appropriate FRU check.
Error Code Appears
When the printer is turned on
When the carriage moves left to right as the paper is picked up.
When the carriage moves right to left as the paper is picked up
During printing when the carriage does not move correctly
2-32
Action
Turn off the printer.
Install the controller board and connect the power
supply connector.
Press and hold MENU and Print Buffer and turn on
the printer to clear the controller diagnostic mode.
Check operation of buttons, LEDs, and LCD, see
"Controller Diagnostics" on page
their tests, replace the controller board. Be sure to
transfer the controller card and memory SIMMs to
the new card. If the buttons, LEDs, and LCD do not
pass the tests, replace the operator panel.
Conditions That Could Cause This
Symptom
• Dirty platen
• Paper jam
• Linear encoder/paper width sensor
mounted too low, or failing
• Paper out photo sensor failing
"Paperfeed Mechanical Service Check" on page
3-9. If they all pass
Go To
Step 1
Step 2
Step 3
Step 4