Tray Empty Service Check - Lexmark X500n Service Manual

Tray empty service check

Step Questions / actions
1 Remove paper tray from printer. Press
bottom of spring platform latches located in
rear corners of paper tray. This releases
spring platform of paper tray. Ensure tray is
raising paper after insertion. Is tray working
properly?
2 Ensure paper empty sensor flag swings with
ease and is not broken or damaged. Is flag
working properly?
3 Turn printer off, and remove engine
controller board shield. See
controller board removal" on page 4-34
for steps to remove engine controller board
shield. Is cable properly connected to
engine controller board connector MCN9?
4 Reconnect operator panel. Turn printer on.
Touch negative lead of voltmeter to metal
frame to obtain ground. Touch positive lead
to engine controller board MCN9 pin 12 to
ensure 5 VDC is being supplied to paper
empty sensor. Is 5 VDC present?
5 insert empty paper tray into printer. Check
voltage level on MCN9 pin 14. Is 5 VDC
present?
6 Remove paper tray, fill with paper and
reinsert. Check voltage level on MCN9 pin
14. Is 0 VDC present?
7 Turn printer off. Remove paper guide (C)
assembly. See
removal" on page
continuity that connects MCN9 pins 12, 13,
and 14 to paper empty sensor. Also check
for shorted pins. Is cable okay?
8 Check cable continuity between LVPS ACN1
and engine controller board connector
POCN. Also check for shorted pins. Is cable
okay?
"Engine
"Paper guide C assembly
4-31. Check cable for
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Replace engine controller
board. See "Engine
controller board removal"
on page 4-34.
Replace paper guide (C)
assembly. See "Paper
guide C assembly
removal" on page 4-31.
Replace LVPS. See "Low
voltage power supply
(LVPS) with cage
removal" on page 4-40.
7100-XXX
No
Replace paper tray.
Replace paper guide (C)
assembly. See "Paper
guide C assembly
removal" on page 4-31.
Properly connect cable.
Go to step 8.
Go to step 7.
Replace paper guide (C)
assembly. See "Paper
guide C assembly
removal" on page 4-31.
Replace cable.
Replace cable.
2-29
Diagnostic information