Section V Model 166D, MX-2962/USM-l05A
Table 5-2 and Figure 5-2
Table 5-2. System Troubleshooting -
Step Preliminary Action Nor ma 1 Indication I Next Step I
1 Set SWEEP SELECTOR to MAIN Oscilloscope operates normally If necessary, troubleshoot
SWEEP and check oscilloscope oscilloscope. Refer to
for proper operation. Refer to oscilloscope manual.
oscilloscope manual.
If oscilloscope operates
normally, proceed to
step 2.
-
2 Set SWEEP SELECTOR to DE- Delaying sweep appears on crt If indication is normal,
LAYING SWEEP, DELAY with 2-cm brightened segment proceed to step 3.
LENGTH to about 4 CM, DE- approximately centered on If neither delaying sweep nor
LAY FUNCTION to TRIGGER trace. brightened segment appears,
MAIN SWEEP, DELAYING check delaying sweep gen-
SWEEP to .5 MILLISECONDS/
CM, and SWEEP MODE to erator. Refer to table 5-4.
FREE RUN. If brightened segment does
not appear, check delay
On oscillosc6pe set SWEEP trigger generator. Refer
MODE to PRESET and to table 5-5.
SWEEP TIME to. 1 MILLI-
- SECONDS/ CM.
3 Set SWEEP MODE to PRESET. Delaying sweep appears on crt If indication is normal, all
with 2-cm brightened segment circuits are functioning.
On oscilloscope set CALI- approximately centered on Check instrument perform-
BRATOR to .5, and connect
VOLTS terminal of calibrator trace. ance as instructed in
to trigger INPUT of Model 166D. section VI.
If no sweep appears, refer
to table 5-3.
-
Figure 5-2. Location of Test Points
5-2 01227-1 |
ACEC
HEWLETT-PACKARD
