Bell System Practices 630 Series Installation And Maintenance Manual page 14

SECTION 502-600-100
18-BuTTON
TELEPHONE SET
Q
/\ ";:@-d
000
<\@>
~'
/" +
3
,$?
760A (MD) LOUDSPEAKER (SEE NOTE)
55-TYPE (MD)
A p 1 ?
\/
CONTROL
o
UNIT (SEE NOTE)
MTG CORO-
$~ 66 E-TYPE
105- 130V CONN BLK
AC OUTLET
\
2012B TRANSF ,
INSIOE WIRING CABLE+
A.
w
\
AIOOD CONN CABLE
W /
55-TYPE (MD)
CONTROL
o
(SEE NOT<)
(k
2012B TRANSF
105-130VAC OUTLET
r
INSIOE WIRING CABLE
/
NOTE:
REQUIREO WHEN SPEAKERPHONE
IS INCLUOED.
.
OR
KTS
B.
A - uSING 66 E-TYPE CONNECTING BLOCK
B - USING A1OOD CONNECTOR CABLE
pig. 21 —Two Typical Installation Layouts (Including Specrkorphone)
3.o6 The use of the head telephone set with jack
terminals 3 and 4 with a 62 ohms KS-13490L1
equipped telephone set requires an amplifier
l/2-watt resistor.
to equalize the level of the N1 transmitter with
the T1 transmitter in the handset. If the headset
lVote: If handset transmission is too loud
transmission is too loud or inadequate the 241-type
check connections to the amplifier to insure
amplifier should be replaced.
that the handset transmitter output is not
being amplified.
3,o7
In early production sets a 151D amplifier is
used.
If the headset transmission is too
3.08
Two KS-14337 capacitors on terminals 1 and
loud replace the 30 ohm resistor on TB2 between
5, and 2 and 6 may be replaced if defective.
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