Xerox ColorQube 8570 Service Manual page 118

A B C
• Printhead Assembly (REP
Replace the Right Side Power Control Harness.
Perform procedures in RAP 99,002, 99,003
Replace the Drum Assembly (REP 2.4). Does the error persist?
Y N
Troubleshooting complete.
Replace the Electronics Module (REP 5.1).
Fault Messages and Codes
99,006, 99,008
2.3).
Jetstack Disconnect.
99,008 PEST - Preheat Heater Disconnect
A Preheat Heater error has occurred. The Preheat Heater is not drawing the expected power
from the Power Supply. The following troubleshooting applies to this error.
Table 1 Applicable Fault Code
99,008 PEST - Preheat Heater Disconnect
Initial Actions
• Reboot the printer and verify the error persists.
• Check the Preheat Heater's wiring connection.
• Check that the Preheater is plugged in.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Preheater and Deskew Assembly,
• Electronics Module, PL 5.1 Item 1
• Right Side Power Control Harness,
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 2, Right Side Electronics Module P/J Locations
• Figure 3, Front Side Wire Routing
• Figure 4, Bottom Front Wire Routing
• Figure 6, Hard Drive, Drum Heater, Paper Preheater
• Figure 9, I/O Board, Sensors (2 of 2)
Procedure
Check the wiring harness connectors P/JAC3, P/J115, and P/J125. Are the connections
secure and undamaged?
Y N
Reseat and/or replace the wiring harnesses.
Disconnect the wiring harness connector
• At the harness, measure the red-black Preheater circuit; the circuit should measure ~55
ohms.
Are they open or shorted?
Y N
Check the Heater. Is the Heater test open?
Y N
Perform the following checks:
• Test F3 in the Power Supply. Refer to
bleshooting section in Chapter 6, General Troubleshooting.
• Test for bad Jetstack triac. Refer to
the Electrical Troubleshooting section in Chapter 6, General Troubleshooting.
• Test for shorts to Earth. Measure the resistance of
should be greater than 2 Megaohms.
Are F3 and the triacs OK and is
hms? (Ensure your DMM is rated to measure high-impedance resistance.)
A B
October 2012
2-72
PL 2.1 Item 20
PL 5.1 Item 13
P/JAC3 from the right side of the Electronics Module.
Testing F2 and F3 in the Electrical Trou-
Checking for Shorted and Leaky Triacs
P/JAC2 Pin 1 to Pin 7. It
P/JAC2 Pin 1 to Pin 7 greater than 2 Megao-
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ColorQube 8570/8870 Service Manual
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