Installation manual

6. Initial Installation Diamond digital

DIL switch MONITOR Switch T4 for adjusting the screen color of the menu monitor (EGA or

VGA).

See the section ”Connecting a menu monitor”.

LED row STATUS Status indicator (G11...G18) of the power-up test.

See the section ”Error Diagnosis” in the service manual.

LED Test

G11 RAM-Test

G12 Service-Term (DUART 1 Channel B)

G13 INT3-Test

G14 EPROM-Test

G15 DUART 1 Channel A, DUART 2 Channel A + B

G16 INT2-Test

G17 Hardware I/O

G18 unused

At the beginning of the test, all used LEDs are lit. After having passed

the test, the associated LED is switched off. Switching-off is made

from the left to the right. This, however, is hardly perceptible when

powering up, since the tests – except for the RAM and EPROM

checks – are very fast.

If a certain test failed, the LED G18, stays lighted. An exception is the

lowest LED which indicates during normal operation the error ”NO

CHEAPERNET COMMUNICATION” in addition to the running light.

When all tests have been passed, a kind of running light appears on

the LED row. This shows immediately whether the controller operates

in the normal mode.

The running light is operated by the microcomputer only if it is not oc-

cupied with something more important.

Thus, the speed of the running light allows a qualitative judge-

ment of the the computer activity.