Lexmark X500N, Service Manual

Page: 59 / 244

Diagnostic information
2-21
7100-XXX
Erase lamp service check
Step Questions / actions Yes No
1 Turn printer off, and remove toner cartridges
and photodeveloper cartridge. Check erase
lamp cable for proper connection. Is erase
lamp cable properly connected? Go to step 2. Properly connect erase
lamp. Retest printer. If error
clears, problem solved,
otherwise go to step 2.
2 Check erase lamp for any visible damage. Is
erase lamp damaged? Replace erase lamp. See
“Erase lamp removal” on
page 4-20
. Retest printer. If
error clears, problem
solved, otherwise remove
toner cartridges and
photodeveloper cartridge
and go to step 3.
Go to step 3.
3 Set multimeter to check diodes. Looking at
erase lamp through front cover, touch meter
positive lead to left LED connection and
meter negative lead to right LED
connection. LED should illuminate. Check
all LEDs on erase lamp board. Do any LEDs
fail to illuminate? Replace erase lamp. See
“Erase lamp removal” on
page 4-20
. Retest printer. If
error clears, problem
solved, otherwise go to step
4.
Go to step 4.
4 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 MCN8?
Go to step 5. Properly connect cable.
Retest printer. If error
clears, problem solved,
otherwise go to step 5.
5 Disconnect cable from erase lamp and
engine controller board MCN8. Check for
continuity between cable pin that
corresponds to MCN8 pin 11 and erase
lamp cable connector pin 3. Also check for
continuity between cable pin that
corresponds to MCN8 pin 12 and erase
lamp cable connector pin 1. Check for
shorted pins on both sides of cable. Is cable
okay? Replace engine controller
board. See
“Engine
controller board removal”
on page 4-34
. Go to step 6.
Replace cable. Retest
printer. Go to step 6.
6 Retest printer. Does error clear? Problem solved. Contact higher level
support.