Xerox 3400N Service Guide - Page 46

Engine Controller Board.

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Page 46 highlights

3DSHU 7UDQVSRUW The feed and pinch rollers continue to drive the paper into the transfer area where the image is transferred from the drum to the paper. The paper continues to the fusing area where it goes between the fuser rollers. The heat roll is heated by a halogen lamp. When the paper goes between the heat roll and the pressure roll, the toner is melted into the paper, forming a permanent image. The temperature of the heat roll is monitored by a thermistor that sends signals to the Print Engine Controller Board. The Fuser drives the paper into the exit rollers and the exit rollers drive the paper into either the Face Up or Face Down output tray. )XVHU ([LW 6HQVRU The Exit Sensor monitors the paper movement. If the paper takes too long getting to the sensor, or it stays on the sensor too long, the Print Engine Controller Board will shut down the printer and light the Paper and Error LEDs. Repair Analysis Procedures 35

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Repair Analysis Procedures
35
3DSHU±7UDQVSRUW
The feed and pinch rollers continue to drive the paper into the transfer area where the
image is transferred from the drum to the paper.
The paper continues to the fusing area where it goes between the fuser rollers. The heat
roll is heated by a halogen lamp. When the paper goes between the heat roll and the
pressure roll, the toner is melted into the paper, forming a permanent image. The
temperature of the heat roll is monitored by a thermistor that sends signals to the Print
Engine Controller Board.
The Fuser drives the paper into the exit rollers and the exit rollers drive the paper into
either the Face Up or Face Down output tray.
)XVHU±([LW±6HQVRU
The Exit Sensor monitors the paper movement. If the paper takes too long getting to the
sensor, or it stays on the sensor too long, the Print Engine Controller Board will shut down
the printer and light the Paper and Error LEDs.