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Troubleshooting 4-78
NovaJet 800 Series Service Manual
Figure 4-80. Paper Sensor.
8. If the carriage assembly suddenly stops at left end of unit during
initialization - initialization does not complete (dim or blank control
panel display), this could be the symptom of a defective paper
sensor. This could also be due to a faulty power supply. The
paper sensor should sense the platen on the return trip but may
fail to do so - no error code given. Replace paper sensor on the
right carriage in this situation, unless the power supply is proven
defective first.
9. Disconnect the servo motor and stepper motor connections at
Main PWA. Check for proper voltages with the various loads
isolated. Replace motor as necessary. Refer to Disassembly.
10. Replace the memory module if not already performed. Refer to
Disassembly.
11. Replace the Main PWA in all other cases. Refer to Disassembly.