Lexmark C950 - Lower Engine PCBA Fuse 9 Blown; Lower Engine PCBA Fuse 10 Blown; Lower Engine PCBA Fuse 11 Blown

2-78 Service Manual
5058-030
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191.13 Lower engine PCBA fuse 9 blown
191.14 Lower engine PCBA fuse 10 blown
191.15 Lower engine PCBA fuse 11 blown
Step Action and questions Yes No
1 Warning: Remove the cause of
blown fuse before replacing the
lower engine PCBA.
Check the toner dispense motor
(Y, M, C, K) for overcurrent and
overvoltage.
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:
• 2nd transfer roller contact
retract motor
• Printer left duplex door
assembly
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:
•Fuser motor
• Registration drive 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