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SECTION 503-603-101
TABLE C (Cont)
CONNECTIONS- 2872A1M OR 2872A2M TELEPHONE SET WITH
ONE-TOUCH CALLING USING 38 SPEAKERPHONE
CONNECT
LEAD
TEL SET
FROM
TO
APPARATUS
(NOTE
1)
1498AOPT
CONTUNIT
DESIG
(NOTE
5)
(D10R
COLOR
CORDI
FROM
TOPSB
TERM.
55 A
558
TERM
.
Ml
Pl
6668
15V
TRMTR
s
(T7A Cord)
A1
Fl
LK
760A
Lspk
SPl
(R2FK Cord)
SP2
958-Type
AC1
PWT Unit
AC2
20128
Trnsf
ACl
(Note
3)
AC2
•
Insulated
and stored
t
Terminal
on
network
8-8K
4
7
8L·R
13
8
8K·S
11
16
0·8K
3
18
Y·O
29
19
G·Y
2
17
8K·O
11
35
G
34
20
R
33:1:
29:1:
38
§
4
8
§
27
27
36
36
:1:
To reduce
loudspeaker
volume, move SP2 lead to terminal 24
(55
A) or 30
(558)
§
Insulate and
store
(8lr
V)
and
(V·
8L)
leads in connector cable
.
Notes
:
l.
Plug
telep hone set mounting
cord into 1498
adapter.
2.
When
installing
the 0·180492 Kit of
Parts,
disconnect (8K) strap from
PS8
terminal
10, insulate
and
store; d1sconnect
(8K)
lead
from PS8 terminal 20; insulate
and
store
.
3.
Both power
~nit
and 20128
transfor mer
must
be
connected for speakerphone operation
.
4
.
When mstalhng
t he
D-180493 Kit of
Parts
,
re move
(8K)
strap leads
from
PS8 terminals 19 26 and
29
Insulate
and
store.
'
'
'
5.
When
55
A control
unit
is
used
,
it must be the
type
modified for
TOUCH-TONE,
and
strap terminals
20
and 21
(55 A)
or
4
and
5 (55
8
).
were required with the D50AM-87, whereas
individual conductors of the D50BB-87 connect
to the TIP and
RING
contacts of the 635-type
key.
Network Terminals
3.16
For access to the
network
terminals.
(1)
Remove
the faceplate
(3.19).
(2)
Loosen the captive cover screw at the bottom
of
the
white cover
around
the dial
(Fig.
2).
Page 16
(3)
Remove
the
cover.
(4)
To replace
the cover, the three tabs of the
cover (one at the top
center
and
one at
each
side
just
above the
dial
)
must
be aligned
with
holes
in the chassis before the screw is refastened.
Failure to
do
this will
result
in improper seating
of
the faceplate.
Power Supply (PSB), Terminals
3.17
To
access the
terminal
field on the
power
supply
board,
proceed as follows.
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