Lexmark C 950 Service Manual

							Diagnostic information 2-61
  5058-030
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132.04 ATC sensor (C) failure
7Check the developer motor for 
proper connection.
 Is the above component 
properly connected?
Replace the PC/developer drive 
motor. 
Go to “PC/developer drive motor removal” on page 4-135.
Replace the connection.
8POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 9.
Problem resolved
9POR the machine.
 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 path from the toner 
cartridge to the developer.
 Is the above component free 
from obstacles?
Go to step 2.Remove the toner blockages, 
including internal clogs inside the 
developer and toner cartridge.
2Check the ATC sensor PCB.
 Is the above component 
properly connected?
Go to step 3.Replace the connections.
3Remove the ATC sensor PCB. 
Go to “ATC sensor PCB removal” on page 4-26.
 Does the error remain?
Go to step 4.Problem resolved
4Check the toner dispense 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 C toner dispense 
motor.
 Does the above component 
operate properly?
Go to step 6.Go to step 5.
Step Action and questions Yes No 
						

							2-62  Service Manual 5058-030  
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137.01 Upper printer engine PCBA communication error
5Check the toner dispense motor 
for proper connection.
 Is the above component 
properly connected?
Replace the toner dispense 
motor. 
Go to “Toner dispense motor removal” on page 4-166.
Replace the connections.
6Check the developer 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 Developer motor.
 Does the above component 
operate properly?
Go to step 8.Go to step 7.
7Check the developer motor for 
proper connection.
 Is the above component 
properly connected?
Replace the PC/developer drive 
motor. 
Go to “PC/developer drive motor removal” on page 4-135.
Replace the connection.
8POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 9.
Problem resolved
9POR the machine.
 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
1POR the machine.
 Does the error continue?
Replace the upper printer engine 
PCBA.
Go to “Upper printer engine PCBA removal” on page 4-184.
Problem resolved
Step Action and questions Yes No 
						

							Diagnostic information 2-63
  5058-030
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140.01 Registration drive motor failure 
141.01 Drum drive motor (K) failure 
StepAction and questionsYesNo
1Check the registration 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 Registration motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 3.Go to step 2.
2Check the registration drive 
motor for proper connection.
 Is the above component 
properly connected?
Replace the registration drive 
motor. Go to “Registration drive motor removal” on page 4-144.
Replace the connections.
3POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 4.
Problem resolved
4POR the machine.
 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 drum 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 KCMY drum & 
transfer belt motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 3.Go to step 2. 
						

							2-64  Service Manual 5058-030  
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141.02 Drum drive motor (Y/M/C) failure
2Check the drum motor for proper 
connection.
 Is the above component 
properly connected?
Replace the PC/developer drive 
motor. Go to “PC/developer drive motor removal” on page 4-135.
Replace the connections.
3POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 4.
Problem resolved
4POR the machine.
 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 drum 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 KCMY drum & 
transfer belt motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 3.Go to step 2.
2Check the drum motor for proper 
connection.
 Is the above component 
properly connected?
Replace the PC/developer drive 
motor. Go to “PC/developer drive motor removal” on page 4-135.
Replace the connections.
3POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 4.
Problem resolved
4POR the machine.
 Does the error continue?
Replace the upper printer engine 
PCBA.
Go to “Upper printer engine PCBA removal” on page 4-184.
Problem resolved
Step Action and questions Yes No 
						

							Diagnostic information 2-65
  5058-030
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146.xx Tray 1 lift motor failure
StepAction and questionsYesNo
1Check the sensor (tray 1 media 
level) on the tray 1 media feeder.
Is the sensor properly 
attached?
Go to step 2.Reattach the sensor.
2Check the sensor for proper 
operation. 
Navigate to: Diagnostics Menu > 
SENSOR TESTS >  PRINTER SENSOR TESTS > Sensor (tray 1 media level)
Does the display on the 
operator panel change every 
time the sensing area of the 
sensor is interrupted or 
blocked?
Go to step 4.Go to step 3.
3Check the sensor for proper 
connection.
Is it properly connected?
Replace the sensor. Go to “Sensor (media level) removal” on page 4-151.
Reseat the cable.
4Check the tray 1 media feed lift  
motor for proper operation.
When performing motor tests, ensure 
that all cover and 
door interlock 
switches are 
overridden.
Navigate to: Diagnostics Menu > 
MOTOR TESTS >  PRINTER MOTOR TESTS > 
Tray1 Feed/Lift Motor
Does it operate properly?
Go to step 6.Go to step 5.
5Check the motor for proper 
connection.
Is it properly connected?
Replace the media feed lift motor. 
Go to “Media feed lift motor removal” on page 4-118.
Reseat the cable.
6POR the machine and perform a 
print test.
Does the error continue?
Replace the tray media feeder. 
Go to “Printer tray 1 feeder removal” on page 4-141.
Problem resolved.
7POR the machine and perform a 
print test.
Does the error continue?
Replace the lower engine PCBA. 
Go to “Lower engine PCBA removal” on page 4-101.
Problem resolved. 
						

							2-66  Service Manual 5058-030  
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151.01 Transfer belt motor failure
151.02 First transfer contact/retract failure
StepAction and questionsYesNo
1Check the transfer belt 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 Transfer belt motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 3.Go to step 2.
2Check the transfer belt motor for 
proper connection.
 Is the above component 
properly connected?
Replace the transfer belt motor. 
Go to “PC/developer drive motor removal” on page 4-143.
Replace the connections.
3POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 4.
Problem resolved
4POR the machine.
 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 sensor (1st transfer 
rolls retract HP) for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch SENSOR TESTS.
3. Touch PRINTER SENSOR 
TESTS.
4. Touch Sensor (1st transfer 
rolls retract HP).
 Does the display on the 
operator panel change every 
time the sensing area of the 
above sensor is interrupted or 
blocked?
Go to step 3.Go to step 2. 
						

							Diagnostic information 2-67
  5058-030
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151.03 Second transfer contact/retract failure
2Check the sensor (1st transfer 
rolls retract HP) for proper 
connection.
 Is the above component 
properly connected?
Replace the 1st transfer retract 
clutch assembly. 
Go to “1st transfer retract clutch assembly removal” on page 4-22.
Replace the connections.
3Check the 1st BTR retract 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 1st transfer rollers 
retract motor (contracted).
5. Touch 1st transfer rollers 
retract motor (retracted).
 Does the above component 
operate properly (motor 
rotating)?
Go to step 5.Go to step 4.
4Check the 1st BTR retract motor 
for proper connection.
 Is the above component 
properly connected?
Replace the 1st BTR retract 
motor. Go to “Fuser/lower redrive/1st BTR retract motor removal” on page 4-102.
Replace the connections.
5POR the machine.
 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 sensor (2nd transfer 
roll retract HP) for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch SENSOR TESTS.
3. Touch PRINTER SENSOR 
TESTS.
4. Touch Sensor (2nd transfer 
roll retract HP).
 Does the display on the 
operator panel change every 
time the sensing area of the 
above sensor is interrupted or 
blocked?
Go to step 3.Go to step 2.
Step Action and questions Yes No 
						

							2-68  Service Manual 5058-030  
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154.01 Developer (Y/M/C) motor failure
2Check the sensor (2nd transfer 
roll retract HP) for proper 
connection.
 Is the above component 
properly connected?
Replace the printer left duplex 
door assembly. Go to “Printer left duplex door assembly removal” on page 4-139.
Replace the connections.
3Check the 2nd transfer roller 
retract motor for proper 
operation.
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch PRINTER MOTOR 
TESTS.
4. Touch 1st transfer roller 
retract motor (contracted).
5. Touch 1st transfer roller 
retract motor (retracted).
 Does the above component 
operate properly (motor 
rotating)?
Go to step 5.Go to step 4.
4Check the 2nd transfer roller 
retract motor for proper 
connection.
 Is the above component 
properly connected?
Replace the printer left duplex 
door assembly. Go to “Printer left duplex door assembly removal” on page 4-139.
Replace the connections.
5POR the machine.
 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 developer 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 Developer motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 3.Go to step 2.
Step Action and questions Yes No 
						

							Diagnostic information 2-69
  5058-030
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155.01 Toner dispense motor (K) failure
2Check the developer motor for 
proper connection.
 Is the above component 
properly connected?
Replace the PC/developer drive 
motor. Go to “PC/developer drive motor removal” on page 4-135.
Replace the connections.
3POR the machine.
 Does the error continue?
Replace the lower engine PCBA.
Go to “Lower engine PCBA removal” on page 4-101.
Go to step 4.
Problem resolved
4POR the machine.
 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
1Replace the toner cartridge.
 Does the error remain?
Go to step 2.Problem resolved
2Check the toner smart chip PCB.
 Is the above component 
properly connected?
Go to step 3.Replace the connections.
3Check the toner dispense 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 K toner dispense 
motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 5.Go to step 4.
4Check the toner dispense motor 
for proper connection.
 Is the above component 
properly connected?
Replace the toner dispense 
motor. Go to “Toner dispense motor removal” on page 4-166.
Replace the connections.
5POR the machine.
 Does the error continue?
Replace the upper printer engine 
PCBA.
Go to “Upper printer engine PCBA removal” on page 4-184.
Problem resolved
Step Action and questions Yes No 
						

							2-70  Service Manual 5058-030  
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156.01 Toner dispense motor (C) failure
157.01 Toner dispense motor (M) failure
StepAction and questionsYesNo
1Replace the toner cartridge.
 Does the error remain?
Go to step 2.Problem resolved
2Check the toner smart chip PCB.
 Is the above component 
properly connected?
Go to step 3.Replace the connections.
3Check the toner dispense 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 C toner dispense 
motor.
 Does the above component 
operate properly (motor 
rotating)?
Go to step 5.Go to step 4.
4Check the toner dispense motor 
for proper connection.
 Is the above component 
properly connected?
Replace the toner dispense 
motor. Go to “Toner dispense motor removal” on page 4-166.
Replace the connections.
5POR the machine.
 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
1Replace the toner cartridge.
 Does the error remain?
Go to step 2.Problem resolved
2Check the toner smart chip PCB.
 Is the above component 
properly connected?
Go to step 3.Replace the connections.