TM 5-6675-318-14
HP-IB ERROR DISPLAYS AND POSSIBLE CAUSES - Cont
Table 3-26.
Display or Printout
P o s s i b l e Causes
PARALLEL POLL FAILURE
"IUT DID NOT CONDUCT PARALLEL
(1) Failure of parallel poll logic on
POLL CORRECTLY. NO "SQR" WAS
PCA A1.
PRESENT AND POLL RETURNED
"
(2) Parallel poll logic switch is set
incorrectly.
Failure of parallel poll logic, out-
(3)
put data latch, or control bus latch
on PCA A2.
" IUT DID NOT CONDUCT PARALLEL
Parallel poll switch is misset.
(1)
POLL CORRECTLY. "SRQ" WAS
PRESENT; POLL RETURNED --'
(2) Failure of parallel poll logic on
SHOULD HAVE BEEN 2"
PCA A1 and A2.
( 3 ) Failure of ROM U1.
"IUT DID NOT RESPOND CORRECTLY
Failure or wrong setting of parallel
TO PARALLEL POLL. RESPONSE WAS
poll switch.
,SHOULD HAVE BEEN 1.
CHECK PARALLEL POLL SWITCH
SETTING--SHOULD BE 1"
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