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SECTION 512-510-200
where ambient temperature may exceed 140
degress F.
(b) The transformer must operate from a power
outlet not controlled by a switch.
(c) Use connecting blocks, inside wiring cable,
and station wire to connect components in
accordance with appropriate connections and
maintenance section for set being installed.
Table A lists associated transmitters and
2.02
loudspeakers to be installed with a particular
type telephone set.
• TABLE A.
SYSTEM COMPONENTS
TEL SET
511C/D
511F/H
558-Type
711B
712B, 1712B (MD),
2712B
751A/D (MD), 751C/D
1751-, 2751-Type
752-, 754-, 1752-,
2752-, 2754-Type
1511-Type (MD),
2511F/H
1558D (MD),
2558D
Unpacking
Use care in unpacking system components
2.03
to prevent damage to plastic covers and
delicate components.
51A Control Unit:
2.04
(a) Loosen two screws and remove cover.
(b) Mount upright on a vertical surface in the
same manner as a 105-type apparatus box.
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Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
512-510-200-i0 7 _1970-12-D2.JP S
LOUDSPEAKER
TRMTR
678A
660A
or
678A
659A
759A
664A
664C
761A
664B
762A
664E
759A
664D
See appropriate section in Division 463 for
installation procedures for this box.
(c) Make connections as shown in Fig. 6 and
appropriate connections and maintenance
section and replace cover.
(d) To facilitate maintenance, terminate one cable
on one row of terminals and successive
cables on remaining rows of terminals.
Internal Transmitters
2.05
(a) Each set must be equipped with an internal
transmitter. See connections and maintenance
section for particular telephone set for transmitter
installation information.
(b) The 664-type transmitters are electrically
the same as the 659A and 660A, but have
a separate component board which must also be
mounted in the set.
Internal Loudspeakers (761A or 762AJ:
2.06
Used in panel telephone sets. See connections
and maintenance section for particular telephone
set for transmitter installation information.
759A Loudspeaker
2.07
(a) To prevent feedback, install loudspeaker to
left of a wall telephone set. Where conditions
permit, loudspeaker may be installed on baseboards
as an alternate location.
(b) Four mounting holes are provided in the
base for securing to the mounting surface
(Fig. 2).
Cord and cable enter through two
holes in base or through the end after removing
the knockouts.
(c) Drilled to mount on a 63A bracket or, by
using a 146A or B adapter assembly, may
be mounted on a standard electrical outlet box.
A backboard is not required for mounting.
(d) Contains a 12-terminal connecting block which
can serve as a junction for the telephone
set mounting cord and a 6-pair cable from the
51A control unit.
A cord hook is provided on
the connecting block to anchor the set cord.
Apr 29, 2012 18:40:05
(room speaker):
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