TM 11-6625-596-12
Seq
Item
Procedure
Reference
No.
15
Depress Observe that panel meter pointer reads 0.
button.
16
RINGER 2400, RINGER
Depress each switch in sequence In each case, the meter
5300, RINGER 12000
reads 30 or above and the inverter buzzes.
buttons.
17
VARISTOR button
Depress Panel meter pointer reads on green scale.
18
EARPHONES button
Depress Panel meter pointer reads on green scale.
19
SOUND POWER TELE-
Depress. Panel meter pointer reads on green scale.
PHONE button
20
MIC ROPHON ES OTHER
Depress Panel meter pointer reads on green scale.
21
EARPHONES button
Depress Panel meter pointer reads on green scale.
(repeat)
22
Set at DRIVER Panel meter pointer reads on green scale.
switch
23
1 LOW button,
Depress in sequence Panel meter pointer reads on green scale
2 CENTER pushbutton,
in each case.
and 3 HIGH button.
24
MICROPHONES OTHER
Depress Panel meter pointer reads on green scale.
TYPES button.
Panel meter pointer reads on green scale.
25
MICROPHINES CARBON
Depress Panel meter pointer reads on green scale.
button.
26
DIAL BREAK button and
Depress DIAL BREAK button and rotate DIAL BREAK
DIAL BREAK CAL-
CALIBRATE control Panel meter pointer can be moved
IBRATE control
to red CAL mark.
27
DIAL SPEED button and
Depress DIAL SPEED button and rotate DIAL SPEED
CALIBRATE control
Panel meter pointer fluctuates
BRATE control
slightly and can be moved to red CAL mark.
28
INSULATION RESIST-
ANCE button and
INSULATION RE
Panel meter pointer can be moved to red CAL mark.
SISTANCE CALI
BRATE control.
29
TELEPHONE EFFICIENCY-
Depress Panel meter pointer reads on green scale.
SEND- button.
30
TELEPHONE
Depress Panel meter pointer reads on green scale.
EFFICIENCY-
RECEIVE-button.
31
Place shorting bar across the binding posts Continuity lamp
LEADS terminals,
lights and buzzer sounds.
3-3