Lexmark X500N, Service Manual

Page: 66 / 244

2-28
Service Manual
7100-XXX
Lower feed unit (secondary paper assembly) service check
Step Questions / actions Yes No
1 Turn printer off, and remove engine
controller board shield. See
“Engine
controller board removal” on page 4-34
for steps to remove shield. Is cable properly
connected to engine controller board
connector MCN6?
Go to step 2. Properly connect cable.
Retest printer. If error
clears, problem solved,
otherwise go to step 2.
2 Remove right cover. See “Right cover
removal” on page 4-13 . Check cable that
connects engine controller board connector
MCN6 to lower feed unit for continuity and
pin shorts. Is cable okay?
Go to step 3. Replace cable.
3 Replace lower feed unit. See “Secondary
paper feed assembly removal” on
page 4-9
. Does error clear?
Problem solved. Go to step 4.
4 Replace engine controller board. See
“Engine controller board removal” on
page 4-34
. Does error clear?
Problem solved. Contact higher level
support.