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Table
6-4.
English/Metric
Pulse
Output Electronics System
Troubleshooting
(Cont'd)
b) Check system grounding (see Section V).
C)
Check temperature in the coupler environment.
COUPLER
TEMPERATURE
O0
to
5S°C
d)
Check
voltage
on
each
circuit
card
in
the
coupler.
Out
of
range
SYMPTOMS
None-Electronics
should
work
a s
described.
e) If all reference or measurement LED indicators on the 10760A counter cards do not light when
power is applied :
ACTION
None
Counters
may
jump
or
count
erratically
LOCATION
+5V
Front-edge
test
point
ACTION
I
LOCATION
I
RESULT
I
SUBSEQUENT ACTION
Ventilate
enclosure
VOLTAGE
At
least
+5V
k
.01V
on
each
card.
Verify pre-
sence of
reference
and measure-
ment signals
with oscil-
loscope
These signals
are square
waves.
10760A Front-
edge
Measurement :
signal
pins 18,20
Reference :
signal
pins 22, 24
Signal
present
Signal
absent
Signal
present
If LED i s extin-
guished, trouble-
shoot 10760A.
Troubleshoot
receiver or
cabling.
If LED i s extin-
guished, trouble-
shoot 10760A.
If
multi-axis
system,
10760A
counter
cards
can
be
interchanged
to
isolate
problem.
(Remember
to
change
card
address.)
Signal
absent
PROBLEM
EXISTS
BUT
N O T
ON
ALL
AXES
'
Troubleshoot
laser head or
cabling.
2.
if
the
system
is
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
10763A
switches
and
jumpers
(refer
to
Section
V ,
Table
5-2).
b)
Check
voltage
on
each
coupler
card
1
1
each
card.
I
LOCATION
+5V
front-edge
test
point
VOLTAGE
At
least
+5V
f
.MV
on
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Troubleshooting
