TM 5-6675-320-14
(6) If display does not return after line is executed, press RESET and
rotate HP-IB interface select code switch to 0, then back to 7 carefully with a
flat tip screwdriver.
( 7 ) R e p e a t s t e p ( 4 ) .
( 8 ) I f d i s p l a y d o e s n o t r e t u r n o r d i s p l a y i s i n c o r r e c t , c a r d i s d e f e c t i v e.
Refer unit to direct/general support maintenance.
e.
S e l f - t e s t .
NOTE
Plotter can be tested using preprogrammed self-test procedure that is
controlled by self-test selector switches located on PCA A2. Failures
can 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
PCA 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 .
The RESET switch S5 (red) sets the plotter to the same state as a
power-up sequence.
S e l f - t e s t i n d i c a t i o n s a r e o b t a i n e d f r o m t h e f o u r l i g h t e m i t t i n g d i o d es
(LEDs) beside the test switches.
These 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:
L E D c h e ck - The self-test LEDs flash sequentially.
ROM LSB - A2U56
ROM MSB - A2U55
RAM - A2U67, U66, U65, U64
I n t e r r u p t 1 -
i n t e r r u p t r e q u e s t l o g i c , s u b r o u t i n e , a n d s t a c k p o i n t e r.
I n t e r r u p t 2 -
interrupt subroutine and return to normal.
HP-IB - HP-IB circuits.
Front 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.
Motor 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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