TM 5-6675-318-14
Table 3-36. HP-IB ERROR DISPLAYS AND POSSIBLE CAUSES
P o s s i b l e Causes
Display or Printout
STATUS TEST FAILURES
(1) Failure of PCA A2.
"HP-IB IDENTIFIER BYTE IS
NOT CORRECT--IT IS
,
(2) Bus ADDRESS switch set incorrectly.
IT SHOULD BE 60(OCT)"
(1) Failure of ROM.
"ERROR BYTE IS NOT CORRECT
, IT SHOULD BE 0 "
--IT IS
(2)
Failure
of
input/output
multipliers.
(1) Improper select code switch setting.
"ADDRESS BYTE IS INCORRECT
--IT IS
, IT SHOULD
(2) Failure of select code switch.
BE 325(OCT)" "CHECK SWITCH
SETTING"
(3) Failure of select code decoders.
( 4 ) Improper ADDRESS switch setting.
(1) Failure of control logic circuitry.
"CONTROL BYTE IS NOT RESET
, IT
CORRECTLY--IT IS
(2) Failure of interrupt logic.
SHOULD BE 100(OCT)"
"STATUS BYTE IS NOT RESET
(1) Failure of microprocessor.
CORRECTLY--IT IS
, IT
(2) Failure of computer interrupt
SHOULD BE 14(OCT)"
circuits.
CONTROL BYTE TEST FAILURES
Failure of HP-IB transceivers.
(1)
"TRIED TO CLEAR (SRQ, REN,
A T N , IFC or EDI)BUT
Failure of control bus latch.
(2)
COULD NOT"
(3) Failure of control logic.
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