Operation Manual

152 Chapter 6 - Troubleshooting

Heating element check

Paper passes between the heating element and a soft pressure roller

to fuse toner to the paper.

1 Unplug the printer for at least ten minutes.

2 Verify that the thermistor connector is seated into both the printer

chassis and the ECU.

3 Remove the heating element connector (callout 1) from the ECU.

To measure the continuity of the heating element, measure the

resistance between the two pins at the end of the cable.

Note Normal resistance is 25 ohms +/- 10 ohms for the 110V printer and 80

ohms +/- 20 ohms for the 220V printer.

If no resistance is measured, replace the fuser.

4 Remove the thermistor connector (callout 2), and measure the

resistance between J206 pins one and two and between J206

pins three and four.

Note Normal resistance between both pairs of pins is 370K ohms +/- 50K

ohms at 20° C (68° F).

5 If no resistance is measured, replace the fuser.

Figure 74. Locating connectors for the heating element check