Lexmark C 950 Service Manual

Diagnostic information 2-81
  5058-030
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191.14 Lower engine PCBA fuse 10 blown
191.15 Lower engine PCBA fuse 11 blown
191.16 Lower engine PCBA fuse 12 blown
StepAction and questionsYesNo
1Warning: 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...

2-82  Service Manual 5058-030  
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191.17 Lower engine PCBA fuse 13 blown
191.18 Upper engine PCBA data failure
191.19 Upper engine PCBA access failure
2POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Problem resolved
StepAction and questionsYesNo
1Warning: Remove the cause of 
blown fuse before replacing the 
lower engine PCBA.
Check the PC/Developer drive 
motor (Y,M,C) circuits for 
overcurrent and...

Diagnostic information 2-83
  5058-030
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191.20  Upper engine PCBA buffer failure
191.23 Lower engine PCBA fuse 14 blown
191.24 Lower engine PCBA fuse 15 blown
StepAction and questionsYesNo
1POR The machine.
 Does the error continue?
Go to step 2Problem resolved
2Turn the power OFF, and check 
whether there is poor connection 
between the EEPROM and the 
upper engine PCBA.
 Are there no problems with the 
connection?
Turn the power OFF, and replace 
the upper printer engine 
assembly....

2-84  Service Manual 5058-030  
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191.25 Lower engine PCBA fuse 16 blown
200.01 Sensor (registration) static jam 
StepAction and questionsYesNo
1Warning: Remove the cause of 
blown fuse before replacing the 
lower engine PCBA.
Check the registration/transport 
roller assembly.
 Are the current and voltage 
values normal?
Go to step 2Replace the faulty part or repair 
the circuits.
2POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA...

Diagnostic information 2-85
  5058-030
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200.03 Sensor (registration) late jam (feeding from the tray)
6POR the machine, and perform a 
PRINT test.
Go to “PRINT TESTS” on page 3-22.
 Does the error continue?
Replace the upper printer engine 
PCBA.
Go to “Upper printer engine PCBA removal” on page 4-184.
Problem resolved
StepAction and questionsYesNo
1Check the media path.
 Is the media path free of any 
media fragments?
Go to step 2.Remove any media or media 
fragments.
2Check the...

2-86  Service Manual 5058-030  
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200.03 Sensor (registration) late jam (feeding from the MPF)
6Check the media transport/MPF 
drive motor for proper operation.
When performing motor tests, ensure 
that all cover and 
door interlock 
switches are 
overridden.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch PRINTER MOTOR 
TESTS.
4. Touch Tray [x] feed/lift 
motor (pick)
5. Touch Tray [x] feed/lift 
motor (feed).
 Does the above component 
operate properly?
Go to step 8.Go...

Diagnostic information 2-87
  5058-030
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2Check the Sensor (registration) 
for proper operation.
1. Enter the Diagnostics Menu.
2. Touch SENSOR TESTS.
3. Touch PRINTER SENSOR 
TESTS.
4. Touch Sensor (registration).
 Does the display on the 
operator panel change every 
time the sensing area of the 
above sensor is interrupted or 
blocked?
Go to step 4.Go to step 3.
3Check the sensor (registration) 
for proper connection.
 Is the above component 
properly connected?
Replace the...

2-88  Service Manual 5058-030  
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200.05/200.55 Sensor (registration) lag jam
7Check the MPF feed/lift motor for 
proper connection.
 Is the above component 
properly connected?
Replace the media transport/MPF 
drive motor. 
Go to “Media transport/MPF drive motor removal” on page 4-121.
Replace the connection.
8POR the machine, and perform a 
PRINT test.
Go to “PRINT TESTS” on page 3-22.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page...

Diagnostic information 2-89
  5058-030
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5Check the sensor (registration) 
for proper connection.
 Is the above component 
properly connected?
Replace the media transport/
MPF drive motor assembly. 
Go to “Media transport/MPF drive motor removal” on page 4-121.
Replace the connections.
6Check the fuser motor for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch PRINTER MOTOR 
TESTS.
4. Touch Fuser/lower redrive/
1st transfer retract motor.
 Does the...

2-90  Service Manual 5058-030  
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200.53 Sensor (registration) late jam (80K interval exceeded for feed rollers)
StepAction and questionsYesNo
1Check the media path.
 Is the media path free of any 
media fragments?
Go to step 2.Remove any media or media 
fragments.
2Replace the pick/feed rollers. Go 
to “Pick roller removal” on page 4-138.
 Does the jam continue?
Go to step 3.Problem resolved
3Check the sensor (registration) 
for proper operation.
1. Enter the Diagnostics Menu.
2....