October 2012
2-87
ColorQube 8570/8870 Service Manual
99,061
Fault Messages and Codes
Xerox Internal Use Only - Revised, 3rd Revision
99,061 PEST - The Wave Amp Shorted
A Wave Amp error has occurred. The Wave Amp appears to be shorted. It is drawing too much
power. The following troubleshooting procedure applies to this error.
Initial Actions
• Reboot the printer and verify the error persists.
• Check the component power connections and harness condition.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Printhead Assembly, PL 2.1 Item 3
• Electronics Module, PL 5.1 Item 1
• Power Control Board, PL 5.1 Item 8
• Wave Amplifier, PL 5.1 Item 9
• Cable, Wave Amp Signal, PL 5.1 Item 18
• Cable, ZIF, Wave Amp Drive, PL 5.1 Item 19
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 2, Wave Amplifier, Printhead Heaters
• Figure 3, Left Side Electronics Module P/J Locations
• Figure 6, Top Side Wire Routing
• Figure 6, Printhead P/J Locations
• Figure 7, Wave Amp P/J Locations
• Figure 9, Power Control Board P/J Locations
Procedure
CAUTION
Handle the ribbon cables carefully. Check that each cable is square to the socket and fully
inserted. Damage to the Wave Amplifier could result from improper cable connections.
Check the wiring harness connectors P/J640 & P/J800 on the Wave Amp, P/J240 on the
Printhead Board, and P/J901 on the Power Control Board. Inspect the ends of the drive cable
conductors of damage.
Release the end of the cable and carefully examine the conductor ends (a magnifier helps) to
see that they are not cracked or torn. If the cable looks good, carefully reinstall it using a ZIF
tool (refer to REP 2.3 for how to use the ZIF tool for unlocking/locking the ZIF cable connector).
NOTE: Failure to properly unlock the connector will damage the cable.
Are the connections secure and undamaged?
YN
Reseat the wiring harnesses.
Replace the Wave Amp Signal Cable and/or Wave Amp Drive Cable. Does the error persist?
YN
Troubleshooting complete.
Unplug the Wave Amp Drive cable, then test VPP/VSS points on the Printhead Board wiring
harness connector P/J110 (see Figure 1). Measure resistance of each to ground.
•Pin 1 (VSS)
• Pin 2 (Ground)
•Pin 3 (VPP)
Is either one shorted?
YN
Unplug the Wave Amp signal cable from the Electronics Module. Power on the printer.
Measure voltage at test point TP801 Power on the Controller Board (see Figure 2).
Is it
shorted?
YN
Replace the Wave Amp (REP 5.9)
Replace the Power Control Board (REP 5.6) (Electronics Module).
Replace the Printhead Assembly (REP 2.3).
Figure 1 Measuring Resistance on the Printhead Board
Table 1 Applicable Fault Code
99,061 PEST - The wave amp appears to be shorted. It is drawing to much power.
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