Kurzweil K2000 Service Manual page 77

SECTION 4
DIAGS1_0.00c
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Figure 4.14 - Burn-in Test Menu
The Burn-in test can be aborted at any time by pressing the EXIT button, then
pressing any button on the front panel to return to the diagnostic test menu
(the display says "Press any
key,"
meaning a front panel button, not one of
the black-and-white keys). It may be necessary to press the EXIT button more
than once, because the K2000 can only recognize switch closures between tests.
Press any front panel button to interrupt the Burn-in test temporarily. The
test will resume when the button is released. Press anyone of the keys, the
test will be interrupted and hold temporarily; it will resume when any front
panel button is pressed.
4.19.3 Selectinq a Specific Test
To run an individual test, use the Alpha Wheel to select the desired test from
the diagnostic test menu. The selected test is highlighted in reverse.
Press the ENTER button to run the selected test one time. When the test is
completed, the display will show the result of the test. Normally each test
need only be run once in the attempt to identify failures. If you encounter
test failures, you may want to run the failed test continuously. Running a
given test continuously is recommended to monitor the K2000's output signal
with an oscilloscope, since many tests are completed too quickly to be
monitored in a single pass.
4.19.4 Continuous Testinq
A selected test can be run indefinitely by pressing 2 on the alphanumeric
buttonpad, then pressing ENTER. This will cause the selected test to run
until it is interrupted with the EXIT button. Remember, it may be necessary
to press the EXIT button more than once.
Press any front panel button to interrupt a continuous test temporarily. The
test will resume when the button is released. Press anyone of the keys, the
test will be interrupted and hold temporarily, and will resume when any front
panel button is pressed.
As the continuous tests are running, the bottom line of the display will
indicate the number of tests that have been completed, and the number of
failures that have occurred.
4.20 TEST TYPES
The tests described in this section are of three types, referred to as RAM
tests, ROM tests, and 1/0 tests. Memory tests check the physical memory
addresses of the data corresponding to various components. This is done by
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