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Troubleshooting 4-100
NovaJet 800 Series Service Manual
Parallel Port Test
Attach the service loopback test cable to the printer’s parallel port
(contact ENCAD Technical Support to obtain). Activate the ‘Continuous
Test’ by selecting the Utility Menu, Service Menu, Diagnostics Menu,
Continuous Test. The printer will activate several test patterns, the
“parallel port test equals passed” should be printed. If successful then
the parallel port is operating correctly.
Caution: Connecting a parallel printer cable to a printer that is turned on
can cause damage to the printer. U9/U17/U22 buffer I/C’s on the Main
PWA are subject to failure when power arcs across the parallel pins.
Always turn printer off before connecting a parallel printer cable or
switching an A/B parallel connection switch from one printer to another.
Figure 4-111. Loopback Test Cable.
Please contact ENCAD technical support for the loopback test cable
(The loopback test cable is a short test cable which has a centronics port
on one end and a mini-din connector on the other). Connect cable to
parallel port only. Disregard the Serial Port test as this is only for
manufacturer testing. Power printer off and disconnect loopback cable,
wait 10 seconds, apply power. Also refer to the ‘Intermittent Problems/
Continuity’ procedure.
Other port testing procedures
1. Perform a follow up test print using a known good file. Obtain test file
from the Servicing Support CD (service item only). File must be sent
through the EFPU 3.0 (Encad File Print Utility).