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Operator's Service
To run the self-tests (1664A)
To exit the ROM Test, select Done. Note that the status changes to
13
Passed or Failed.
Install a formatted disk that is not write protected into the disk drive.
14
If an 1664A with option 020 being tested, connect an RS-232C
loopback connector onto the RS-232C port. Run the remaining
System Tests in the same manner. If option 020 is not installed, the
RS-232C test will return a FAILED status.
Select the Front Panel Test.
15
A screen duplicating the front-panel appears on the screen.
Press each key on the front panel. The corresponding key on the
a
screen will change from a light to a dark color.
Test the knob by turning it in both directions.
b
Note any failures, then press the Done key a second time to exit the
c
Front Panel Test. The test screen shows the Front Panel Test status
changed to Tested.
Select the Display Test.
16
A white grid pattern is displayed. These display screens can be used to
adjust the display.
Select Continue and the screen changes to full bright.
a
Select Continue and the screen changes to half bright.
b
Select Continue and the test screen shows the Display Test status
c
changed to Tested.
20-24
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