TM 11-6625-2616-14
graph 4-12 (referenced in the chart) contains
rective measures indicated do not result in cor-
additional information and step-by-step instruc-
rection of the trouble, or if the corresponding
tions for effecting repair of the equipment dur-
number does not appear in the troubleshooting
ing the troubleshooting procedures.
chart, higher level maintenance is required. Para-
Checks and corrective meawres
Trouble symptom
Probable trouble
Item No.
a. Improper ac line cord connec-
a. Check ac line cord and connector
Readout tubes and incandescent
1
tion.
plug,
lamps do not light when PWR
b. Defective ac line fuse. . . . . . . . . .
b. Check ac line fuse (para 4-12a).
ON switch is depressed.
Note. Defective line fuse may in-
dicate some other trouble. If fuse
replacement continues to result in
blown fuse, higher level of main-
tenance is required.
c. Check position of power-selection
Power-selection switch in 230 po-
C.
switch.
sition with 115 volts ac applied.
Defective readout tube . . . . . . . . . . . .
A single readout tube does not
Replace readout tube (para 4-12b).
2
light.
a. Allow 30 minutes for complete
a. Insufficient warmup time . . . . . . .
Readout will not come to all
3
warmup.
zeros with input leads shorted
b. Zero adjustment (ZA) required . . . .
b. Zero the readout (para 2-5).
together.
