Lexmark MS310 4514-220 - Page 128

Action Yes No
Step 1
a Restore the engine settings to their defaults:
Diagnostics Menu > Printer Setup > Defaults
b Restore the EP setup settings to their defaults:
Diagnostics Menu > EP Setup > Defaults
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
• Check the fuser cables JTHERM1 and JEXIT for proper
connection to the controller board.
• Check the cable PCN5 for proper connection to the power
supply.
Are they properly connected?
Go to step 3. Reseat the cables.
Step 3
Are the cables JTHERM1, JEXIT and PCN5 free of damage?
Go to step 4. Replace the fuser.
See
“Fuser
removal” on
page 262.
Step 4
a Turn o the printer.
b Remove the rear door and cover.
c Disconnect the fuser cable connected to PCN5 of the power
supply.
d Check for approximate correct resistance on the fuser cable:
• 220V fuser—43 ohms
• 110V fuser—10 ohms
• 100V fuser—8 ohms
Is the resistance equal to any of the above values?
Perform an LVPS
service check. See
“LVPS service
check” on
page 129.
Replace the fuser.
See
“Fuser
removal” on
page 262.
Step 5
Check the fuser rollers, belts and gears for damage and debris.
Are they free of damage and debris?
Perform a cooling fan
service check and
LVPS service check.
See
“Cooling fan
service check” on
page 153 and
“LVPS service
check” on
page 129.
Replace the fuser.
See
“Fuser
removal” on
page 262.
4514-2xx
Diagnostics and troubleshooting
128