TM 11-6625-596-12
Item No.
Trouble symptom
Probable trouble
Corrective measure
No noise heard from loud speaker
b.Check switch contacts. Clean
contacts
speaker.
No noise heard from loud
with brush or cleaning compound.
-
contacts not seating, or
Return to higher maintenance category
broken.
for repair.
23
a. No meter reading.
a. Assembly 1A3A1
a. Same as for item 13a and b.
b. Off-scale meter reading
b. Faulty component in meter circuit
b. Same as for item 13b level.
24
Meter will not read on green scale
Pushbutton switch defective.
Same as for item 13b.
25
Meter does not read on green scale
Pushbutton switch defective
Same as for item 13b.
26
Meter pointer cannot be set
a. Assembly 1A3A9 not properly
a. Same as for item 13a.
on red CAL mark.
ly mounted.
b. Pushbutton switch defective.
b.
Same as for item 13b.
27
a.
No reading on meter.
a. Assembly 1A3A9 and A10
a.
Same as for item 13a.
not properly mounted. Push
button switch defective.
b.
High reading on meter.
b. Faulty component in circuit.
B.
Same as for item 13b.
29
a.
Meter does not read on
a. Assembly 1A3A7 not prop
a.
Same as for items 13a and b.
Green scale.
erly mounted. Pushbutton
switch defective.
b. Low reading or oscillation
b. Electrostatic shield between
b. Remove shield. Clean contacting
heard in loudspeaker.
1A3A3 and A7 not making
face of shield and chassis with clean
good contact with chassis.
Ing compound. Replace, checking to
see that shield exerts light pressure on
chassis.
30
Meter does not read on
a. Assembly 1A3A7 not proper
a. Same as for item 13a.
green scale
ly mounted.
b. Pushbutton switch defective.
b.
Same as for item 13b.
31
a.
does not light. Buzzer does
not sound.
b.
Wires loose on buzzer.
b. Check wires attached to buzzer
1A4A1. Tighten nuts on buzzer
terminals.
4-5