Specifications

7 To exit the ROM Test, select Done. Note that the status changes to
Passed or Failed.
8 Install a formatted disk that is not write protected into the disk drive.
Connect an RS-232C loopback connector onto the RS-232C port. Run
the remaining System Tests in the same manner.
9 Select the Front Panel Test.
A screen duplicating the front-panel appears on the screen.
a Press each key on the front panel. The corresponding key on the
screen will change from a light to a dark color.
b Test the knob by turning it in both directions.
c Note any failures, then press the Done key a second time to exit the
Front Panel Test. The test screen shows the Front Panel Test status
changed to Tested.
10
Select the Display Test.
A white grid pattern is displayed. These display screens can be used to
adjust the display.
a Select Continue and the screen changes to full bright.
b Select Continue and the screen changes to half bright.
c Select Continue and the test screen shows the Display Test status
changed to Tested.
Operator’s Service
To run the self-tests (1660A through 1663A)
20-16