Xerox 8500DN Service Manual - Page 105
PEST Error - Printhead Left jetstack disconnect., PEST - Printhead Reservoir 0 disconnect.
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Error Messages and Codes ■ Reservoir heater, 37,004.40 or 37,005.41 ■ Drum heater error 37,006.42 ■ Preheater error 37,008.44 ■ Ink melters errors 37,009.45 thru 37,013.40 The printer includes several heaters powered by AC. The printer itself can power up despite insufficient or irregular AC voltage but it may fail its AC heater tests. This is due the test not measuring sufficient current flowing through the heater at the moment the test runs. Devices sharing the printer's AC circuit shared, such as a laser printer, a coffee maker, or a space heater, may be placing heavy intermittent demand on the AC circuit. This sudden inductive demand creates momentary AC voltage sag that causes the PEST test to fail. Verify the AC power source prior to troubleshooting these errors. For wiring diagrams to aid in diagnosing PEST faults, see "Wiring Diagrams" on page 10-1. 8400/8500/8550/8560 PEST Description 37,001.46: Generic PEST error. Something went wrong during the PEST process. 37,002.47: PEST Error - Printhead Left jetstack disconnect. The left jetstack is not drawing the expected power from the supply. 37,03.48: PEST - Printhead Right jetstack disconnect. The right jetstack is not drawing the expected power from the supply. 37,004.40: PEST - Printhead Reservoir 0 disconnect. Reservoir 0 is not drawing the expected power from the supply. 37,005.41: PEST - Printhead Reservoir 1 disconnect. Reservoir 1 is not drawing the expected power from the supply. 37,006.42: PEST - Drum disconnect. The Drum heater is not drawing the expected power from the supply. 37,008.44: PEST - Preheater disconnect. The Preheater is not drawing the expected power from the supply. 8400 PEST Description 8500/8550/8560 PEST Description 37,009.45: Inkmelt 0 (Yellow) disconnect. The inkmelt heater is not drawing the expected power from the supply. All ink melters are disconnected. All ink melters are not drawing the expected power. Check to see if the ink melter's AC cable is connected. 37,010.46: Inkmelt 1 (Cyan) disconnect. The inkmelt heater is not drawing the expected power from the supply. Inkmelt 0 (Yellow) disconnect. The inkmelt heater is not drawing the expected power from the supply. 37,011.44: Inkmelt 2 (Magenta) disconnect. The inkmelt heater is not drawing the expected power from the supply. Inkmelt 1 (Cyan) disconnect. The inkmelt heater is not drawing the expected power from the supply. Phaser 8400/8500/8550/8560 Color Printer Service Manual 3-37
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