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Table
6-7.
HP-IS
Interface
Electronics
System
Troubleshooting
(Cont'd)
e)
Check
I/O cabling from
controller
to
coupler.
f)
If
the
reference
or
measurement
LED
indicators
on
the
10760A
counter
cards
do
not
all
light
when
power
is
applied
:
If
multi-axis
system,
10760A
counter
cards
can
be
interchanged
to
isolate
problem.
(Remember
to
change
card
address.)
P R O B L E M
EXISTS
B U T
N O T
ON
ALL
AXES
2.
If
the
system
i s
multi-axis
but
the
problem
is
not
present
on
all
axes,
substitute
known
good
components
to
isolate
the
problem
system
component.
The
following
may also
apply:
a)
Check
voltage
on
each coupler
card
:
-
-
=
-
-
- .
--
-
-
SUBSEQUENT ACTION
If LED is extin-
guished, trouble-
shoot 10760A.
Troubleshoot
receiver or
cabling.
If LED is extin-
guished, trouble-
shoot 10760A.
Troubleshoot laser
head or cabling.
ACTION
Verify pres-
ence of ref-
erence and
measurement
signals with
oscilloscope
These sig-
nals are
square waves.
LOCATION
+5V Front-edge
test point.
VOLTAGE
At least +5V
+
.01V on
each card.
LOCATION
10760A front-
edge
Measurement
:
signal
(pins 18, 20)
Reference :
Signal
(pins 22, 24)
RESULT
Signal
present
Signal
absent
Signal
present
Signal
absent
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Table of Contents
Troubleshooting
