TM 11-6625-539-14-4
Table 32. Troubleshooting
Malfunction
Probable cause
Corrective action
1. Cover latches fail to open or open
a. Latches or catches bent.
a. Straighten latches or catches.
with difficulty.
b. Apply drop of light oil on pivot
b. Latches corroded.
points.
2. Meter pointer not at zero when unit
a. Use meter zero screw to adjust me-
a. Meter mechanical zero not adjusted.
is off.
chanical zero.
b. Report to higher category mainte-
b. Meter defective.
nance.
3. Meter fails to deflect to BAT CHK
a. Batteries depleted.
when switch is operated.
b. Batteries not correctly installed.
b. Install batteries observing polarity
marked on battery case.
4. All in-circuit tests erratic or fail to
a. Replace test lead.
a. Open or defective test lead.
register on meter.
b. Test lead terminal or alligator clip
b. Clean terminal or alligator clip.
dirty or corroded.
3-3
