Xerox COLORQUBE 8870

October 2012
2-71
ColorQube 8570/8870 Service Manual
99,004, 99,005, 99,006
Fault Messages and Codes
Xerox Internal Use Only - Revised, 3rd Revision
Replace the Printhead Assembly (REP 2.3).
Perform procedures in RAP 99,002, 99,003 Jetstack Disconnect.
Replace the Printhead Assembly (REP 2.3).
99,006 PEST - Drum Heater Disconnect
A Drum Heater error has occurred. The Drum Heater is not drawing the expected power from
the Power Supply. The following troubleshooting applies to this error.
Initial Actions
• Reboot the printer and verify the error persists.
• Check the Drum Heater’s wiring connection.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Drum Assembly, PL 2.1 Item 4
• Electronics Module, PL 5.1 Item 1
• Power Supply Board, PL 5.1 Item 6
• Right Side Power Control Harness, PL 5.1 Item 13
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 1, Right Side Wire Routing
• Figure 6, Hard Drive, Drum Heater, Paper Preheater
Procedure
Check the Drum Heater wiring harness connector P/J114. Is the connection secure and
undamaged?
YN
Reseat and/or replace the wiring harness.
Check the Drum Heater for proper resistance. Disconnect the Drum Heater wiring harness
connector P/J114 from the right side harness. Measure the red-black circuit and the white-
black circuit. Each heater element in the circuit should measure ~65 ohms (white-black ~65
ohms, red-black ~65 ohms).
Is it open or shorted?
YN
Check the Heater. Is the Heater test open?
YN
Perform the following checks:
• Test F3 in the Power Supply. Refer to Testing F2 and F3 in the Electrical Trou-
bleshooting section in Chapter 6, General Troubleshooting.
• Test for bad Jetstack triac. Refer to Checking for Shorted and Leaky Triacs in
the Electrical Troubleshooting section in Chapter 6, General Troubleshooting.
• Test for shorts to Earth. Measure the resistance of P/JAC2 Pin 1 to Pin 7. It
should be greater than 2 Megaohms.
Are F3 and the triacs OK and is P/JAC2 Pin 1 to Pin 7 greater than 2 Megao-
hms? (Ensure your DMM is rated to measure high-impedance resistance.)
YN
Replace the following components:
• Power Supply Board (REP 5.6) (Electronics Module)
Table 1 Applicable Fault Code
99,006 PEST - Drum Heater Disconnect
A B C
A B C