Lexmark X500N, Service Manual

Page: 54 / 244

2-16
Service Manual
7100-XXX
CPU fan service check
Developer drive assembly service check
Step Questions / actions Yes No
1 Open the RIP cage cover. Is the CPU fan
spinning? No issue to fix. Go to step 2.
2 Is the CPU fan cable properly connected to
J-Fan1 on the RIP board? Connect the cable to J-
Fan1. Replace the RIP board. See
“System board removal”
on page 4-36
.
Step Questions / actions Yes No
1 Are there any unusual noises heard around
developer motor or developer drive
assembly before error posts? Replace toner cartridge
(customer-ordered supply).
Go to step 2. Go to step 4.
2 Does noise go away? Problem solved. Replace developer drive
assembly. See
“Developer
drive assembly removal”
on page 4-22
. Go to step 3.
3 Does noise go away? Problem solved. Go to step 4.
4 Turn printer off, and remove right cover. See
“Right cover removal” on page 4-14 . Is
cable properly connected to developer drive
assembly motor?
Go to step 5. Properly connect cable.
Retest printer. If error
clears, problem solved,
otherwise go to step 5.
5 If waste toner bottle is removed, reinsert it.
Ensure rear cover assembly is shut.
Override top and front cover interlock
switches. For location, see
“Interlock
switch locations” on page 5-6 . Reconnect
operator panel. Turn printer on. Allow printer
to run until error posts. Disconnect
connector from each developer motor, and
check for the following on each
disconnected cable connector:
Pin 2 to ground—24VDC
Pin 5 to ground—24VDC
Are voltages present?
Replace developer drive
assembly. See
“Developer
drive assembly removal”
on page 4-21
. Go to step 8.
Go to step 6.
6 Remove engine controller board shield. See
“Engine controller board removal” on
page 4-34
for steps to remove engine
controller board shield. Disconnect MCN5
from engine controller board. Check for
continuity and shorted pins on cable that
connects MCN5 to developer motors. Is
cable okay?
Go to step 7. Replace cable. Retest
printer. If error clears,
problem solved, otherwise
go to step 7.