October 2012
2-25
ColorQube 8570/8870 Service Manual
91,500, 91,523, 91,527, 91,531, 91,850, 91,862
Fault Messages and Codes
Xerox Internal Use Only - Revised, 3rd Revision
91,500 X-Axis Fault
An X-Axis error has occurred. The X-Axis position is 0.0254 mm away from desired posi-
tion.The following troubleshooting procedure applies to this error.
Initial Actions
• Reboot the printer and verify the error persists.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• X-Axis Motor, PL 4.1 Item 11
• Harness, Right Side Power Control, PL 5.1 Item 13
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 1, Right Side Wire Routing
• Figure 7, Motors, Head Maintenance Clutch, Strip Solenoid
Procedure
Check the X-Axis wiring harness and connections. Are the connections secure and undam-
aged?
YN
Reseat and/or replace the Right Side Harness.
Replace the X-Axis Motor (REP 4.11).
91,523, 91,527, 91,531, 91,850, 91,862 Left Jetstack
Thermal Faults
A Left Jetstack Thermal error has occurred. The following troubleshooting procedure applies to
these errors.
Initial Actions
• Reboot the printer and verify the error persists.
• Check the Printhead wiring harness connectors.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Printhead Assembly, PL 2.1 Item 3
• Cable, Printhead Interface, PL 5.1 Item 20
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 2, Wave Amplifier, Printhead
• Figure 6, Printhead P/J Locations
Procedure
Check the Printhead wiring harness connectors P/J180 and P/J240 and wiring. Are the con-
nections secure and undamaged?
YN
Reseat and/or replace the wiring harness (Printhead Interface Cable). Does the error
persist?
YN
Troubleshooting complete.
Replace the Printhead Assembly (REP 2.3).
Turn off the printer.
Check the Thermistor for continuity on P/J110 connector (see Figure 1).
• Short pin 4 to pin 10.
• Measure the Thermistor to ground.
– Pin 2 (Left Jetstack Thermistor) to pin 4
• Check the results as follows:
– Good: 4.88 kohms at room temperature (The Printhead must be cool.)
– Open: >5 kohms
– Short: 0 ohms
Table 1 Applicable Fault Code
91,500 Sfwa Image Initial Position
Table 1 Applicable Fault Codes
91,523 Left Jetstack Heater is too hot.
91,527 Left Jetstack Heater too slow, did not stabilize in time.
91,531 Left Jetstack Thermistor bad reading, cannot trust temperature.
91,850 Left Jetstack Thermistor is open.
91,862 Left Jetstack thermistor is shorted.
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