Lexmark C950 - Lower Engine PCBA Fuse 7 Blown; Lower Engine PCBA Fuse 8 Blown

Diagnostic information 2-77
5058-030
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191.11 Lower engine PCBA fuse 7 blown
191.12 Lower engine PCBA fuse 8 blown
2
POR the machine.
Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA
removal” on page 4-98.
Problem resolved
Step Action and questions Yes No
1 Warning: Remove the cause of
blown fuse before replacing the
lower engine PCBA.
Check the following parts circuits
for overcurrent and overvoltage:
• Fuser cooling fan
• LVPS cooling fan
• Rear left exhaust fan
• Rear upper cooling fan
• Front right cooling fan
Are the current and voltage
values normal?
Go to step 2. Replace the faulty parts, or repair
the circuits.
2
POR the machine.
Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA
removal” on page 4-98.
Problem resolved
Step Action and questions Yes No
1 Warning: Remove the cause of
blown fuse before replacing the
lower engine PCBA.
Check the following parts circuits
for overcurrent and overvoltage:
• MPF tray feeder motor.
• Upper redrive motor.
• Duplex motor.
Are the current and voltage
values normal?
Go to step 2. Replace the faulty parts, or repair
the circuits.
2
POR the machine.
Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA
removal” on page 4-98.
Problem resolved
Step Action and questions Yes No