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Page Title:
CHART 4-1. NO Audio Troubleshooting (Sheet 6 of 25) |
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|  TM
11-5820-401-34-3/0967-LP-432-3060
4-13. TROUBLESHOOTING FLOW CHARTS. (CONT)
CHART 4-1
No Audio Troubleshooting
(Sheet 6 of 25)
NOTES
9. MM-100 FUNCTION to HI-Z. RANGE to
30 V. Probe A to MK-1978:VRC SPKR, Probe
B tO GND.
10. Keep in mind that this entire troubleshooting
procedure assumes one total component fail-
ure, causing absence of an audio signal. This
simple check can quickly isolate a bad CRS.
11. An alternate mathod of checking for a bad
CRS is to ground TP3001 in the A3000 as-
sembly while the AN/GRM. 114A rf output is
variad 1 MHz. If the audio tone is heard when
TP3001 is grounded, it means that the CRS is
bad. If so, go to 1H, Sh 9.
4-38
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