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TROUBLESHOOTING
(Continued)
While the program
Is
running, check for pulses
50 OUT 1010,20
at pins
18
and
20 of
Connector
J1.
If
pulses
60 OUT 1013,15:S=INP(1012)
are
missing,
check
the
Drive
cable
and
check
70
OUT
1
01
3,
1
:
S=
I
NP
C 1
01 2
)
the Disk
Drive
Interface
circuit
on
the Com-
80 OUT 1013,16:
S=l
NPC1012)
puter
System
Board.
If
pulses
are
present,
90
FOR
T=1
TO 500:NEXT
T
check
for
pulses
at
pins
4
thru
7
of
Motor
100
GOTO
10
Driver
I
C
(U7).
If
pulses
are missing,
check
Drive Controller
IC
(U3).
If
pulses are pres-
DRIVE
B
ent,
check for pulses at pins
10
thru
13 of
IC
U7.
If
pulses are missing, check
IC
U7,
Capac-
10
OUT 1014,128:OUT 1010,33:OUT 1010,37
itors
C37
and C38,
Connector
J6,
and
check the
20
OUT 1013,7:S=INP(1012>
Stepping Motor
(Ml)
windings
for
continuity.
30 OUT
1013,1
:S-lhF(1012)
40 OUT
T=1
TO 500:
NEXT T
50 OUT 1010,37
60 OUT
1013,15:S=INP(1012)
70
OUT
1013,1
:S=INPC1012)
80 OUT 1013,16:S=INP(1012)
90 FOR T=1
TO 500:NEXT
T
100
GOTO
10
o
o
c/>
CO
o
S-
1
m ^
o <
o
(/)
X
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