Lexmark X500 - Tray Empty Service Check

Diagnostic information 2-29
7100-XXX
Tray empty service check
Step Questions / actions Yes No
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?
Go to step 2. Replace paper tray.
2 Ensure paper empty sensor flag swings with
ease and is not broken or damaged. Is flag
working properly?
Go to step 3. Replace paper guide (C)
assembly. See “Paper
guide C assembly
removal” on page 4-31.
3 Turn printer off, and remove engine
controller board shield. See “Engine
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?
Go to step 4. Properly connect cable.
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?
Go to step 5. Go to step 8.
5 insert empty paper tray into printer. Check
voltage level on MCN9 pin 14. Is 5 VDC
present?
Go to step 6. Go to step 7.
6 Remove paper tray, fill with paper and
reinsert. Check voltage level on MCN9 pin
14. Is 0 VDC present?
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.
7 Turn printer off. Remove paper guide (C)
assembly. See “Paper guide C assembly
removal” on page 4-31. Check cable for
continuity that connects MCN9 pins 12, 13,
and 14 to paper empty sensor. Also check
for shorted pins. Is cable okay?
Replace paper guide (C)
assembly. See “Paper
guide C assembly
removal” on page 4-31.
Replace cable.
8 Check cable continuity between LVPS ACN1
and engine controller board connector
POCN. Also check for shorted pins. Is cable
okay?
Replace LVPS. See “Low
voltage power supply
(LVPS) with cage
removal” on page 4-40.
Replace cable.