Lexmark C520 Series, Service Manual

Page: 103 / 259

Diagnostic information
2-45
5022- xxx
920.08—POST (power on self test) error service check
Step Questions / actions Yes No
1 Turn the printer off and remove the rear
cover. Check connector JFUSER1 for proper
connection to system card, cable for pinch
points and cable or connector for any other
damage. Is cable properly connected and
damage free? Go step 2. If connector is damaged on
system card, replace
system card. Go to
“System card removal” on
page 4-47
. If fuser cable is
damaged, replace cable.
2 Remove fuser. Go to “Fuser removal” on
page 4-13 . Check DC auto-connects on both
the fuser and the printer for damage. Are
connectors free of damage?
Go to step 3. If connector is damaged on
fuser, replace fuser. If the
cable connectors are
damaged, replace the
JFUSER1 cable.
3 Check for the following continuity between
DC auto-connect and FUSER1. Is continuity
present?
DC auto-connect JFUSER1
pin 6 pin 6
pin 7 pin 7
pin 8 pin 8
Go to step 4. Replace DC fuser cable.
4 Reinstall fuser. Go to “Fuser removal” on
page 4-13 . Does error clear?
Problem solved. Go to step 5.
5 Replace fuser. Go to “Fuser removal” on
page 4-13 . Does error clear?
Problem solved. Replace system card. Go to
“System card removal” on
page 4-47
.
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