Problem: A LaserWriter powers on normally, the fuser comes on, main motor
rotation occurs, and the green LED begins blinking. As soon as the printer
is ready to generate a test print, the main motor turns on for
approximately two seconds, all of the LEDs turn off, and no paper is picked
up from the tray.
Cure: Replace the main motor and/or inspect the two pink wires going from
the main motor to the DC Controller. These wires can be easily damaged or
pinched against the chassis when the DC Power Supply and Main Motor Drive
PCB is mounted. If no damage is found, then disconnect connector J503 and
check for a resistance of approximately 265. If the resistance varies a
great deal, then motor replacement will be necessary.