Specifications

Troubleshooting False Paper Jam Error with Startup Page - 18
False Paper Jam Error with Startup Page
Symptom: A false paper jam error occurs when the LaserWriter
12/640 tries to print the startup page. No paper is picked up.
EPOST reports a DC Controller error. When the DC controller
board is replaced, the problem remains. Upon initiating a service
test print, the motor will spin for about a second and then will
stop with no test page output.
Discussion : Observe the pickup solenoid through the small hole in
the shield that covers the pickup drive assembly, and initiate a
service test print. You should see the pickup motor spin, and about
a second later see the solenoid trigger. If it does not, you either
have a bad solenoid, bad cassette size sensor board, or a bad cable
that runs between the solenoid and the sensor board. In the case of
the bad cassette size sensor board, it can cause EPOST to display a
DC controller error.