HP 5501A Operating And Service Manual page 243

Table 6-4. English/Metric Pulse Output Electronics System Troubleshooting (Cont'd)
DATA ERRORS
3. Incorrect display or printout results when the measurement optics are displaced a known distance
:
-
SYMPTOM CAUSE
ACTION
No movement indi- 1. "Start" pulse See "Multi-Axis
cated on all axes
not being sent. problem."
2. 10763A jumpered Check Table 5-2
incorrectly
3. Controller not 1. Use totalizing
recognizing out- frequency counter
put pulses from (Table 6-4a, 6-4b).
laser elec-
tronics. 2. Jumper 10763A1s
a s per Tables
6-4c, 6-4d.
3. Send "start"
pulse to each
10763A and verify
correct number of
output pulses
(Test a).
4.
If counts are in-
correct, see Test
b, c, d.
System mal-
I .
10760A Counter
1.
Using logic probe
functions in ex-
fails to receive verify 10760A re-
tended resolution
extended reso- ceived extended
lution command resolution com-
or resolution
mand. (U47 (9) on
circuitry is 10760 should be a
malfunctioning. TTL high if in
extended resolution).
(e.g. Laser 2. Resolution jum- 2.
If
command not
readings are pers on 10760A received, check
6 or 10 times not correctly proper command
greater or less set. decoder output
than
a
known
on 10760 with
measured distance) logic probe.
3. If command is re-
ceived, verify
10760A is
correctly jum-
pered for desired
resolution.
4. Replace 10760A.
No movement 1. 10760A Mal- 1 . Substitute 10760A
indicated on function. from other axis.
one but not all
axes.
2.
10763A Mal- 2. See Test a.
function.