TM 5-6675-318-14
Table 3-26. HP-IB ERROR DISPLAYS AND POSSIBLE CAUSES - Cont
P o s s i b l e Causes
Display or Printout
PASS CONTROL FAILURES
Failure of computer interrupt circuit
" INTERFACE DOES PASS CONTROL,
on PCA A1 or processor interrupt circuit
BUT DOES NOT ITSELF RELIN-
on PCA A2.
QUISH CONTROL"
(1) C a b l e i s d i s c o n n e c t e d o r l o o s e .
" INTERFACE DOES NOT PASS
CONTROL, BUT DOES ITSELF
(2) F a i l u r e o f i n t e r r u p t c o n t r o l c i r -
RELINQUISH CONTROL . CHECK
cuit on PCA A2.
TO BE SURE CABLE IS CONNECTED"
Failure of interrupt
circuits
on
(1)
"INTERFACE NEITHER PASSES
both cards.
NOR RELINQUISHES CONTROL"
(2) Failure of microprocessor.
EXTERNAL ADDRESS FAILURES
(1) F a i l u r e o f o u t p u t d a t a o r c o n t r o l
"IUT CANNOT BE ADDRESSED AS
bus latch circuits on PCAA2.
A TALKER BY ANOTHER CONTROL-
"
LER. STATUS BYTE IS
(2)
Failure of microprocessor.
(1) Failure of data input multiplexer,
"IUT CANNOT BE ADDRESSED AS
control bus latch, or interrupt cir-
A LISTENER BY ANOTHER CON-
cuits on PCA A2.
TROLLER.
STATUS BYTE IS
"
(2)
Failure of microprocessor.
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