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(N)
>;"""':'-.j
Faulty IC1
(A)
>;"""':'-1 Faulty IC1
BASIC works but GP·IB commands do not work.
Ves
Ves
No
•
,
Faulty address decoding
circuit (lC11, IC10and
IC3)
Faulty
1C9,
IC11
">N_°--lOOiCheck abnormal signal.
24
·1 The R EN line of GP·IB becomes low level by the command
REN and high level by the command LCL
·2 Pin @
outputs negative pulse by reading
1/0
address
C4H (1961.
Pin ([\)
Pin (j)
outputs negative pulse by writing on to
1/0
address C4H (1961.
outputs negative pulle by writing on to
1/0
address C5H (1971.
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