TM 5-6675-323-14
( 6 ) I f d i s p l a y d o e s not return after line is executed, press RESET and
rotate HP-IB interface select code switch to 0, then back to 7 carefully with the
flat tip screwdriver.
(7) Repeat step (4).
(8) If display does not return or display is incorrect, card is defective.
Refer unit to direct/general support maintenance.
e.
Self-test.
NOTE
Plotter can be tested using preprogrammed self-test procedure that is
controlled by self-test selector switches located on PCA A2. Failures
c a n usually be isolated to single PCA or even a group of components on
PCA.
The self-test is controlled by three switches at the rear of the main
P C A A2. Switch S4-2 is used to select the self-test. The CONTINUE
switch S3 (green) is used to continue the test after any error or halt.
T h e RESET switch S5 (red) sets the plotter to the same state as a
p o w e r - u p sequence.
Self-test indications are obtained from the four light emitting diodes
( L E D s ) b e s i d e t h e t e s t s w i t c h e s . T h e s e indicate the binary number of the
f a i l e d t e s t s t e p . The steps are as follows:
LED check - T h e
self-test
LEDs
flash
sequentially.
ROM LSB - A2U56
ROM MSB - A2U55
RAM - A2U67, U66, U65, U64
Interrupt 1 - interrupt request logic, subroutine, and stack pointer.
Interrupt 2 - interrupt subroutine and return to normal.
HP-IB - H P - I B c i r c u i t s .
F r o n t Panel - o p e r a t o r i n t e r a c t i v e t e s t o f t h e f r o n t p a n e l s w i t c h e s .
M o t o r Vectors - o p e r a t o r i n t e r a c t i v e p l o t t i n g t e s t .
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