TB11-6625-596-12/1
d. Crank generator at approximately 200 rpm
connect TEL LINE terminals L1 and L2 to the
corresponding terminals of the telephone set.
(Normal rate). The meter should read 30 or above.
e. For the TA-I/PT hand generator, follow steps in
a, b and c above. Press the TEST button and squeeze
Proper RINGER button and special cable for various ringers
the hand generator handle at the Normal rate. The
Depress RINGER button
meter should read 30 or above. Use special cable C and
Ringer or
Special cable
buzzer
2400
5300 12000
connect to the TEL LINE terminals.
TA-1/PT ............................
X
..............
C
TA-43/PT ..........................
X
..............
C
16. Insulation Resistance Test.
TA-105A/FTC....................
X
..............
E
WARNING
TA-236/FT.........................
X
..............
E
When
INSULATION
RESISTANCE
TA-263/PT ........................
X
..............
C
switch is depressed, up to 100 volts may
TA-264/PT ........................
X
..............
C
be present on TEL LINE terminals LI
and L2.
c. Depress proper RINGER
button
(2400,
5300, 12000) according to the instructions in the above
b. Connect front panel TEL LINE terminals LI and
chart or in the technical manual covering the telephone
L2 to the insulation to be tested. Use special cable E.
set.
d. The ringer or buzzer should sound with
d. Adjust
the
INSULATION
RESISTANCE
satisfactory loudness. Some units have a control to
CALIBRATE control for a midscale reading on the meter.
adjust for various degrees of loudness, and this control
e. Press the TEST button. The meter should read
should be adjusted to determine proper loudness control.
midscale or below.
a.
Perform the starting
15.
Generators Test.
17. Continuity Test. a. Perform the starting procedure
b. Depress the HAND GENERATOR button; the
b. Connect the front panel CONTINUITY TEST
meter should read 0.
LEADS terminals to the circuit under test. If the circuit
c. Connect front panel TEL LINE terminals L1 and
has a dc resistance of 10 ohms or less, the buzzer will
L2 to the generator. Use special cable E. If the
sound and the continuity test lamp will light. Use special
generator is installed in a telephone set, connect TEL
cable E.
LINE terminals LI and L2 to the corresponding terminals
of telephone set.
10