Stromberg-Carlson S-C 1800 Series Instruction manual

--- --
STROMBERG-CARLSON PRACTICES SECTION 81-082-72
Issue 2, April 1976
Par.
I.
2.
3.
3.01
3.02
3.03
3.04
4.
4.01
4.02
4.03
4.04
4.
05
4. 06
4.07
4.08
4.09
4.10
4.11
4.12
4.13
S-C 1800 AND 2800 SERIES, DESK, ROT ARY-DIAL AND TONE-DIAL® , 5-LINE TELEPHONES
CONNECTIONS AND MAINTENANCE
Figure 1. S-C 1800-5B5(
LR}OO Series, Desk, Figure 2. S-C2800-5B5(LR)OO Series, Desk,
Rotary-Dial, 5-Line Telephone TONE-DIAL, 5-Line Telephone
CONTENTS
Page Par.
Introduction 2 5. Maintenance
Related Information 2 5.01 Network Assembly Replacement
Description and Identification 2 5.02 Line
and Hold Key Assembly
Description 2 Replacement
Identification 2 5.03 Hookswitch Replacement
and
Application 3 Adjustment
Additional Features 3 5.04 Dial Replacement
Installation
and Connections 4 5.05 Line Lamp Replacement
Precautions 4 5.06 Handset Replacement
Housing Removal
and Replacement 4
Telephone Line Connections 4 ILLUSTRATIONS
Ringer and Buzzer Installation 4
Polarity Guard 6 Fig.
Busy Station Number Display 7
Line Key
to Signal Key Conversion 7
1. S-C 1800-SBS(LR)OO Series, Desk,
All Buttons Released Intercom 8 Rotary-Dial, 5-Line Telephone
Manual Exclusion Switch Installation 8 2.
S-C 2800-SBS(LR)OO Series, Desk,
Pushbutton Transfer 9 TONE-DIAL, 5-Line Telephone
Speakerphone Connections 10 3.
S-C Series 20 Straight-Line Ringer
Make-Busy Feature, Series
SR PAX
15
Mounting
Headset Amplifier 15
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Page
16
16
16
16
17
17
17
Page
5
TCI Library www.telephonecollectors.info

SECTION 81-082-72
Fig.
4.
5.
6.
7.
8.
9.
10.
11.
12.
ILLUSTRATIONS
S-C No. 95 Tone Ringer Mounting
S-C No. Q-20 or Q-20HV Buzzer
Mounting
Polarity Guard Mounting
Page
5
5
6
Manual Exclusion Switch Mounting and
Operation 8
Locating Transfer Switch
on Housing Face 9
Transfer Switch Assembly Mounting 10
Speakerphone Connections for S-C 1800
Series Telephones 11
Speakerphone Connections for S-C 2800
Series Telephones 12
S-C Series SR PAX Intercom, Make-
Busy Wiring Diagram 15
F0-1 S-C 1800/2800 Series, 5-Line
Telephone Wiring Diagram
19
F0-2 S-C 1807-SBS(LR)OO 5-Line
Telephone Wiring Diagram 23
F0-3 S-C 2807-SBS(LR)OO 5-Line
Telephone Wiring Diagram 27
Table
1.
2.
3.
4.
5.
6.
7.
1.
TABLES
Page
S-C 1800 and 2800 Series, Desk, 5-Line 3
Telephones
Line Key
to Signal Key Conversion Wiring 8
Manual Exclusion Switch Connections 9
S-C 1800 Series Telephone Connections
for W. E. Speakerphone 10
S-C 2800 Series Telephone Connections
for W. E. Speakerphone 10
Speakerphone and Telephone
Connections for S-C 1800Series
Telephones
Speakerphone and Telephone
Connections for S-C 2800 Series
Telephones
INTRODUCTION
13
14
1.01 This section provides connections and
maintenance information on the
S-C 1800 and
2800 series, desk, 5-line, rotary-dial and TONE-DIAL
telephones. These telephones are designed for
use with
S-C 1A2 or similar key telephone systems. Identification
2
and descriptions are covered in paragraph 3 (table I).
Figures 1 and 2 show models
of the S-C 1800 and 2800
series, desk, 5-line telephones.
1.02 This section replaces issue 1, dated September
1974. This section has been updated
to include
new telephone wiring diagrams and delete references to
obsolete or manufacture discontinued equipment.
2. RELATED INFORMATION
2.01 Telephones and Telephone Components Repair
Parts Catalog T-917 provides parts information
and lists for the
S-C 1800 and 2800 series desk, 5-line,
rotary-dial and TONE-DIAL telephones.
2.02 A Sales and Instructional Literature Index,
which lists the latest publications available from
Stromberg-Carlson Corporation, can be obtained from
your Stromberg-Carlson sales representative or from
Publications Services, Stromberg-Carlson Corporation,
100 Carlson Road, Rochester, New York 14603.
2.03 Sections or publications applicable
to the
equipment covered in this section,
as well as
others of particular interest, can be ordered from the
Sales and Instructional Literature Index.
3. DESCRIPTION AND IDENTIFICATION
3.01 Description.
a. The S-C 1800 and 2800 series, desk, 5-line
rotary-dial and TONE-DIAL telephones are
equipped with a six pushbutton-type key assembly.
Normally, operation
of five of these pushbuttons
(white) connects the telephone to
five selected lines
in a key telephone system. The sixth pushbutton
(red) provides a hold control for any
of five selected
lines when receiving or initiating a call on another
line.
b. Incoming calls are indicated by visual or visual and
audible signals.
c. Lamps in pushbuttons light to indicate line-hold
and line-busy conditions.
3.02 Identification.
The models, stock numbers, and features
of the
S-C 1800 and 2800 series, desk, 5-line, rotary-dial and
TONE-DIAL telephones are listed in table
I. These
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SECTION 81-082-72
Table
1. S-C 1800 and 2800 Series, Desk, 5-Line Telephones
~
~
~
E.!.
~
~
::J::
~
~
G
S2
t3
()I
9::
::::i
~
~
_::;
~
:::::
~
=
~
Cl'.)
......i
::::;
< a
Cl'.)
i:t::
::;
@I
~
a
~
Q
f..;.
C'.:t
~
....;:
s h
(".) el
~
::;
~
::::i
~~
~
~
Q
(!::)
(!::) ~
~<
h
~
'°
~
'° ~
~ ;:z
~
::::i
~
~Cl'.)
;§
i:t::
~
Cl'.)
~~
~
~ S-C
;:....
....... ;:....
~
MODEL NO.*
....;:
l.t.;
......i '.t.l
~~
~
a
STOCK NO.**
Vi
'<
Vi '<
Q.,.
i:t::
l800-5B5(LR)OO 703070-IXX x x
I800-5B5(W A)OO
703018-160/166 x x x
I806-5B5(LR)OO 703069-5XX x x
I806-5B5(W A)OO
703018-100/106 x x x
I807-5B5(LR)OO 703070-7XX x x x
I807-5B5(WA)OO 703018-220/226 x x x x
2800-5B5(LR)OO 703070-2XX x x
2800-5B5(WA)OO 703018-170/176 x x x
2806-5B5(LR)OO 703069-6XX x x
2806-5B5(W A)OO
703018-110/116 x x x
2807-5B5(LR)OO 703070-8XX x x x
2807-5B5(WA)OO 703018-230/236 x x x x
*All telephones listed are equipped with plug-ended line cords.
**XX in stock number represents color, see T-916 for currellt colors.
telephones are supplied normally less ringer (LR) but
can be ordered with ringer (WA). Refer to current T-916
for color information. Refer to T-917 for parts
information.
3.03 Application.
The
S-C 1800 and 2800 series telephones are
used with
S-C 1A2 or similar key systems.
3.04 Additional Features.
NOTE For stock number of equipmellt for the
following features, available
as optional equipment, refer
to section 81-082-
73.
a. Audible signal packages or parts.
1. S-C Series 20, straight-line ringer package.
2. S-C Series 20, 60-Hz ringer package.
3.
S-C No. 95 tone ringer package.
4.
S-C 687(T) external tone ringer package.
5. S-C 687(WA) external straight-line ringer
package.
6.
S-C 687(NJ) external 60-Hz ringer package
without volume control.
7. S-C 687(WJ) external 60-Hz ringer package
with volume control.
8. S-C No. Q-20 buzzer.
9.
S-C No. Q-20HV high voltage buzzer.
b. Other special feature packages or parts.
1. S-C 827 diode for 24-Vdc busy-station number
display.
3
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SECTION 81-082-72
2. Diode assembly package for 18-Vac
busy-station number display.
3. Line cable assembly, SO-foot.
4. Line cable assembly, 100-foot.
5. Manual exclusion switch package.
6. Speakerphone package assembly.
7.
Pushbutton transfer package assembly.
8.
S-C HRA-SOOA handset with receiver-amplifier.
9. Amplifier for use with telephone headset.
4. INSTALLATION AND CONNECTIONS
4.01 Precautions.
When performing work on the S-C 1800 and
2800 series, desk, 5-line, rotary-dial or TONE-DIAL
telephones, the following precautions should be taken:
4
a. When removing or replacing housing, first remove
bezel with facemat and faceplate (refer to par.
4.02).
b. ·when removing or replacing housing, exercise
caution to avoid bending parts or disarranging
wiring.
c. Spade-tips and skinned wires must make contact
with their designated terminals only. Electrical
contact with the metal base, network tabs, or other
components could result in malfunctions in operation
of telephone, and possible energizing of dial
fingerstop with line
or ringing voltages.
d. Ensure that all wiring is dressed away from ringer
gongs and all moving parts
of telephone.
e.
Use electricians scissors or diagonal cutting pliers
to remove insulating tubing used on spare leads
to
avoid breaking leads or pulling spade-tips from leads.
f. When using a busy station number display with
18-Vac power, a diode or diode package assembly
must be installed in each telephone (refer
to par.
4.06).
4.02
Housing Removal and Replacement.
a. To remove housing, proceed as follows:
I. Remove bezel, facemat and faceplate by lifting
bezel
out from top of housing, then lift away
from telephone, using an upward motion.
Use care
in removing the bezel to avoid marring housing.
2. Loosen two housing screws, located at rear of
the telephone.
3. Lift housing out and down, disengaging housing
dip from base at bottom of telephone.
b.
To replace housing, proceed as follows:
4.03
I. Hook housing clip into slot located at bottom
of the telephone base.
2. Slide housing in and down over telephone until
housing screws enter slots at rear
of base.
Tighten screws.
3. Insert bezel dips in slots at bottom of housing,
swing bezel, facemat and faceplate to engage
top clips on bezel into housing slots.
4. If bezel does not seat properly or is loose,
check clips on the bezel and reform
as
necessary.
Telephone Line Connections.
All S-C 1800 and 2800 series, desk, 5-line,
telephones described in this section are provided with
plug-ended (Amphenol No. 57
or equivalent) line cords.
Connections are made by inserting the plug into a
house-wired type 66E-3 block or equivalent.
4.04 Ringer and Buzzer Installation.
a. Mount ringers or buzzers (as required) as shown in
the following illustrations.
NOTE. If necessary, remove the dial to provide easy
access to ringer and buzzer mountingpoints.
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1. S-C series 20 straight-line ringer (see fig. 3).
2. S-C No. 95 tone ringer (see fig. 4).
3. S-C No. Q-20 or S-C No. Q-20HV buzzer (see
fig. 5).
b. Connections are made as follows:
NOTE. The S-C 1800 and 2800 series, 5-line
telephones accommodate one ringer only.
1. The S-C series 20 straight-line ringer leads are
noiillally wired to telephone terminal-board
terminals 26 and 47.
If it is required to block de
from the ringer, connect red wire from ringer to
network terminal K and strap terminal 26 to
network terminal A.
2. S-C No. 95 tone ringer leads (green and red) are
also connected to terminal-board terminals 26
and 47 with the following options:
TERM.
BOARD
000000000000
0 0 0
000000000000
CP 3909
Figure 3. S-C Series 20 Straight-Line Ringer Mounting
SECTION 81-082-72
No. 2·32 (SELF-TAPPING) SCREWS
INSERTED FROM BENEATH
TELEPHONE
TERM.
BOARD
I
r-=0--=0=-0~0--=0=--0-=--=0--=0=--0=-=0--=0=--0:::-;
0 0 0
000000000000
CP 3910
Figure 4. S-CNo. 95 Tone Ringer Mounting
0
0-20 or
0-20HV
BUZZER
00000
0
00000
CP5209
Figure 5. S-C No. Q-20 or S-CNo. Q-20HVBuzzer
Mounting
5
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SECTION 81-082-72
a)
For ground-connected ringing or
insulated-generator ringing, remove black
spade-tipped strap
of tone ringer and replace
resistor with a diode
S-C 827, stock No.
202852-138. Make sure diode
is insulated
from all metallic parts.
b)
For battery connected ringing, install as
received. When loop is heavily loaded,
move red lead
of tone ringer from terminal A
to terminal
B. If results are not satisfactory,
move red lead back to terminal A and connect
black lead to terminal
B.
c) To change the tone of the ringer, connect a
0.0047-uF capacitor, stock No. 202864-
345, between tone ringer terminals M and N.
NOTE. Most key system power supply
ringing outputs
are limited to a load of two
high-impedance ringers with capacitors, or
eight high-impedance ringers without
capacitors.
S-C 425E-1 NETWORK
CP 16328
NETWORK
-BRACKET
3. Stromberg-Carlson provides the following
buzzers for intercom service:
The
S-C No. Q-20 buzzer operates from a
source
of 8 to 24 Vac. The S-C Q-20HV buzzer
operates at 90 to 105 Vac. Their leads are
normally connected to terminal-board terminals
25 and 48.
If intercom buzzer is to be audible,
when off-hook, move buzzer lead from terminal
25 to 21.
4.05 Polarity Guard.
A polarity-guard circuit
is required for
pushbutton telephones generating DTMF signaling
beyond a PBX. The polarity-guard circuit prevents the
tone oscillator from being disabled when reverse
supervision occurs on tip and ring leads to the telephone.
Installation and connections (see
fig. 6) are as follows:
a. Remove slate-yellow hookswitch lead from
network terminal G and connect it to polarity
guard terminal T.
No. 6-32 P .. H.l.M. SCREW
Figure 6. Polarity Guard Mounting
6
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b. Connect green polarity guard lead to network
terminal
G.
c. Remove blue key strip lead from network terminal
C and connect to polarity guard terminal S.
d. Connect white polarity guard lead to network
terminal
C.
4.06 Busy Station Number Display.
To use the telephone with a busy station
number display (BSND), a diode must
be connected in
each telephone as described below.
a. 24-Volt Lamps.
When the BSND uses 24-volt lamps and the power
supply
is 24 Vde, make connections as follows:
1. Remove housing (refer .to par. 4.02).
2. Remove slate-green hookswitch lead from
terminal-board terminal 24 and reconnect it to
terminal
1.
3. Connect cathode (-) of an S-C 827 (INI694)
diode to terminal-board terminal 24. Connect
anode (+) to terminal 1.
4. Connect yellow-brown line cord lead (BL) from
terminal-board terminal 1 (connector pin
number 44) to assigned BL lead
of BSND.
5. Replace housing (refer to par. 4.02).
b. 10-Volt Lamps.
When the BSND uses IO-volt lamps and the power
supply
is 18 Vac, diode package assembly
206286-451
is required. Make connections as follows:
1. Remove housing (refer to par. 4.02).
2. Connect slate lead of diode assembly to
terminal-board terminal I.
3. Connect black lead
of diode assembly to
terminal-board terminal 24.
SECTION 81-082-72
4. Connect red lead
of diode assembly to network
terminal L2.
5. Remove red key lead from terminal-board
terminal 24 and reconnect
it to network
terminal L2.
6. Tie or tape diode assembly in telephone to
prevent interference with moving parts or
shorting to metal parts.
7. Connect yellow-brown line cord lead from
terminal-board terminal I (connector pin
number 44) to assigned
BL lead of the BSND.
8. Replace housing (refer to par. 4.02).
4.07 Line Key
to Signal Key Conversion.
a. Remove housing (refer to par. 4.02).
b. Remove key assembly (refer to par. 5.02).
c. Remove locking screw from plunger shaft of key
position being converted to signaling position.
If
more than one key position is to be converted to
signaling, the locking screw must
be removed for each
position converted.
d. Make connections
as shown in table 2.
e. If more than one key position is required for
signaling, multiple the position leads on terminal
52.
NOTE. Store the key locking screw 011 telephone
base using adhesive tape. Tlzis screw is special and
would be necessary to restore key to nomwl line use.
f. Replace key assembly (refer to par. 5.02).
g. Replace housing (refer to par. 4.02).
7
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SECTION 81-082-72
Table 2. Line Key to Signal Key Conversion Wiring
KEY POSITION CONDUCTOR
CONVERTED COLOR
1 White
2 Orange
3 Brown
4 Green
5 Slate
4.08 All Buttons Released Intercom.
To provide all-buttons-released intercom on S-C
No. 1A2, W.E. lAl, or other 1A2 systems, proceed as
follows:
a. Remove housing (refer to par. 4.02).
b. Connect T, R, A, L, and LG to dial or manual
intercom circuit (see fig. F0-1 to
F0-3, as
required).
c. Insulate and store slate-yellow, yellow-slate, and
yellow-brown leads.
d. Replace housing (refer
to par. 4.02).
-MOUNTING SCREW
HOOKSWITCH OFF·HOOK AND
EXCLUSION SWITCH OPERATED
OPEN
CLOSED
OPEN
MOVi?
FROM
TO
TERMINAL TERMINAL
51 52
51
52
50 52
49
52
49 52
4.09 Manual Exclusion Switch Installation.
NOTE. For multiline exclusion, refer to section
66-128-80.
a. Remove housing (refer to par. 4.02).
b. To mount manual exclusion switch, proceed as
follows:
1. Assemble exclusion switch to base u~ing two
mounting screws provided. Do
not tighten
screws securely (see fig. 7).
HOOKSWITCH HOOK
\EXCLUSION:WITCHB~OSED
\ OPEN
-'\.llllliP~
CLOSED
HOOKSWITCH ON-HOOK
AND
EXCLUSION SWITCH NOT OPERATED
NOTE:
Connect exclusion switch leads
as shown in Figure F0-1
CP 1858A EXCLUSION SWITCH
MOUNTING POSITION
Figure 7. Manual Exclusion Switch Mounting and Operation
8
TCI Library www.telephonecollectors.info

2. Adjust exclusion switch position so that
hookswitch assembly rests against its stop
before exclusion switch operating pin stops against
exclusion switch base.
3. Tighten
mounting screws.
4. With
handset off-hook and exclusion switch
operating pin pulled out, sleeve attached to the
operating pin should move between pile-up springs
sufficiently
to open and close contacts.
5. When the handset is replaced on-hook, the end
of the hookswitch assembly should move the
sleeve between the pile-up springs
and operate the
contacts.
6. If the exclusion switch does not operate as
described in steps 4 and 5 above, loosen the
mounting screws, realign the exclusion switch, and
retighten the screws.
c. Exclusion switch
connections.
1. Any one of the five lines can be wired for
manual exclusion.
2.
Connect leads from exclusion switch, as shown
in table 3.
3. Connect excluded station wires of line cord as
shown in wiring diagram (see fig. F0-1 to
F0-3).
d. Check operation of exclusion switch for affected
line.
SECTION 81-082-72
e. Replace housing
(refer to par. 4.02).
4.10
Pushbutton Transfer.
a.
Order transfer pushbutton package assembly.
b. Remove housing
(refer to par. 4.02).
c. With housing removed, place cutout template as
shown in figure 8.
G-----1 .i. ·~ ....
)II I rr·1
TEMPLATE
I I ii
I I
\ I
J'
1 I
'I
I
I I
I;
I I
5·LINE TELEPHONE
HOUSING
CP l695A
Figure 8. Locating Transfer Switch on Housing Face
d. Locate center of 0.343-inch diameter hole
perpendicular to face.
e. Drill a pilot
hole; increase size of hole to
0.343-inch diameter.
Table 3. Manual Exclusion
Switch Connections
EXCLUS/ON SWITCH TELEPHONE TERMINAL STRIP
TERMINAL Lt.ADS LINE I
LINE 2
LINE3 LINE4 LINES
Red 6 6 6 6 6
Brown
27 32 37
42 8
Green
28 33 38
43 9
White 5 5 5 5 5
Yellow 7 7 7 7 7
Slate
29
34 39
44
10
9
TCI Library www.telephonecollectors.info

SECTION 81-082-72
f. Mount switch assembly to network bracket with
two screws provided (see fig. 9).
NETWORK
00 00
MTG BRACKET
00
0
00
NETWORK
~
0
CP 2957
0
Figure 9. Transfer Switch Assembly Mounting
g. Connect black lead of switch assembly to network
terminal L
1.
h. Connect yellow lead of switch assembly to
network terminal L2.
i. Connect one end of spare line cord conductor to
network terminal L2. Connect other end
of spare
line cord conductor to earth ground.
j. Replace housing (refer to par. 4.02).
4.11 Speakerphone Connections.
The
S-C 1800 and 2800 series, desk, 5-line
telephones can
be used with a W.E.-type speakerphone.
It is necessary to add an appropriate dial and provide
connections to the speakerphone by way
of an adapter
cable or spare telephone line cord leads. However, if
telephone line cord leads
are used for this application,
the all-buttons-released intercom feature cannot be used.
To make connections, proceed
as follows:
a. Remove housing {refer to par. 4.02).
b. Remove dial (refer to par. 5.04).
c. Replace with appropriate dial.
10
d. Connect dial leads as indicated in table 4 or 5
and figure 10 or
11.
e. Connect telephone to speakerphone as indicated in
table 6 or 7 and figure 10 or 11.
f. Replace housing (refer to par. 4.02).
Table 4. S-C 1800 Series Telephone
Connections for
W.E. Speakerphone
DIAL CONNECT TO
LEAD TERMINAL
Blue Network RR
Green Network F
White Network R
White Network
GN
Yellow *
Yellow *
*Use D connector or spare terminal.
Table
5. S-C 2800 Series Telephone
Connections for W.E. Speakerphone
DIAL CONNECT TO
LEAD TERMINAL
Green Network L2
Black Network
RR
Orange Network G
Red-Green Network R
White Network
GN
Green-White Network C
Orange-Black Network C
Blue Network B
White-Blue Term. Bd. 22
Red Term. Bd. 4
*Violet Slate Lead
{Adapter Cable)
or
Brown-Violet Lead
(Line Cord)
*Use D connector or spare terminal.
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S-C 9-2H
DIAL
I
I NETWORK I
I I
BL
PULSE
G F
r-
_,w-~-1t7l\R
~ • 'lU
.':,___,1---(/)GN
OFF-NORM
y
CP 3877
SECTION 81-082-72
TERM
BOARD
SPEAKERPHONE LEADS
I
HOOK SWITCH
TO KEY
@2 15-BK
@23 S-R :
d
b
C I
I
ADAPTER CABLE
R
G
y
BI\
'
, ...
:I
I I
I I
I
I I
11
I:
I
I I
I;
' LINE
CORD
I
I
I
I G-V
Rl '•
IV-G
Tl •
v-s
AG
•
o-w
Al
•
s-v
V/J'~-t----------;--;---r-B_L ____ t-+-LK ••i--~-
.---------+--+---RING
TYPICAL
KEY
I +POSITIO~
I
TIP
50
~----w----+---~A
''D' 'CONNECTORS OR SPARE TERMINALS
25 I
r7J.. Y- 0
'ILJ'--~--~---BUZZER LEAD
NOTE: Connections
to speakerphone made by way
of adapter cable or line cord leads.
TO
SPEAKER-
PHONE
Figure 10. Speakerphone Connections for S-C 1800Series Telephones
11
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SECTION 81-082-72
S-C 35C3A
LEADS NETWORK I
0
e/
I
I
I
L2
G
c
1/0
G-W
0-BK
I
R
R-G
W-BL
RR
BK
0
GN
w 0
B
BL
0
R
v
CP 3878
SPEAKERPHONE LEADS
TERM.
BOARD I HOOKSWITCH ADAPTER CAB
LE
I
I G
y
~24
I
S-G
•
~d
S-W
20 BK
19 s b
0
BL
y
TO KEY
IS-BR • f
"D" CONN S-Y •
t I • R
I
BL
TO KEY
I1
2
w S-BK h I
23
S-R
22 I
1--
RING
TYPICAL
' KEY
,,,....
•
I
'POSITION
•
:
' I
50
0
4
0
"D"-CONN
*
021
025
Y-0
BUZZER LEAD
NOTE: Connections to speakerphone made by way
of adapter cable or line cord leads.
TIP
A
s
w
"
I I
Tl
I I
I 1
I AG
I I
I
1 I
1 I
11
1 I
I
Al
I
1 I
I I
11
11
I
LK
11
11
11
1 I
11
11
11
Rl
lR
I
, 1
LJ
1T
I LINE CORD
I V-G
I
...
AVAILABLE
•
I SPARE
I
0-W
...
I S-V
I
...
G-V
...
BR-V
...
...
V-BR
Figure 11. Speakerphone Connections for S-C 2800 Series Telephones
12
TO
SPEAKER-
PHONE
TCI Library www.telephonecollectors.info

SECTION 81-082-72
Table 6. Speakerphone and Telephone Connections for S-C 1800 Series Telephones
REMOVEFROM CONNECT
TO
LEAD DESIGNATION AND COLOR TERMINAL TERMINAL
Key Yellow Network
LI Network F
Key Blue Network c Network
LI
Hookswitch Slate Term. Bd.
25 Term. Bd. 19
Buzzer Yellow-Orange Term. Bd.
21 Term. Bd.
25
Hookswitch Slate-Yellow Network F Network c
Adapter Cable:
RI
Red Network
LI
Tl Green Network RR
AG
Yellow Term. Bd. 24
Al
Black Term. Bd. 20
LK Blue Term. Bd.
21
P3 White Dial off-normal yellow lead*
P4 Slate Dial off-normal yellow lead*
Line Cord:
Rl
Green-Violet Network
LI
Tl Violet-Green Network RR
AG (Use Spare Lead) Term. Bd. 24
Al Orange-White Term. Bd. 20
LK Slate-Violet Term. Bd. 21
P3 Violet-Brown Dial off-normal yellow lead*
P4 Brown-Violet Dial off-normal yellow lead*
*Use D connector.
13
TCI Library www.telephonecollectors.info

SECTION 81-082-72
Table 7. Speakerphone and Telephone Connections for
S-C 2800 Series Telephones
14
LEAD DESIGNATION AND COLOR
Hookswitch Slate-Yellow
Key Blue
Key Yellow
Hookswitch Slate-Brown
Hookswitch Slate
Hookswitch Orange
Buzzer Yellow-0range
Terminal Board:
Term. No. 2 White (Strap)
Adapter Cable:
Rl Red
Tl
Orange
AG Yellow
Al Black
LK Blue
IT White
IR Slate
-Brown
Line Cord:
Rl
Green-Violet
Tl
Violet-Green
AG **Spare
Al
0 range-White
LK Slate-Violet
IT Violet-Brown
IR
Brown-Violet
*Use D connector.
**Use available spare.
REMOVE FROM CONNECT
TO
TERMINAL TERMINAL
Network G *Key Blue
Network c *Hookswitch Slate-Yellow
Network
L1 Network L2
Network
L1 Network c
Term. Bd. 25 Term. Bd. 19
Term. Bd. 25 Network
L1
Term. Bd.
21
Term. Bd.
25
Network
GN Network R
*Key and Blue
*Hookswitch Slate-Yellow
Network G
Term. Bd. 24
Term. Bd. 20
Network
L1
Term. Bd.
21
*Dial Violet
Insulate and Store
*Key Blue
*Hookswitch Slate-Yellow
Network G
Term. Bd. 24
Term. Bd. 20
Network
L1
Term. Bd.
21
*Dial Violet-0range
TCI Library www.telephonecollectors.info

4.12 Make-Busy Feature, Series SR PAX.
a. Remove housing (refer to par. 4.02).
b. Move BLK lead from terminal-board terminal 50
to 52.
NOTE. If black lead is not long enough to be moved
to terminal 52, add a wire lead and use a D
connector.
If terminal 52 is not available, move BLK
lead to any spare terminal and use a spare lead to
connect the spare terminal to the
PAX make-busy
terminals. For instance, figure
12 shows spare termi-
nal
20 and spare B lead being used in place of termi-
nal
52 and lead SG.
c. Add an S-C 827 diode between terminal 50 and
52.
(If a spare terminal was used instead of
terminal 52, add the diode between terminal SO and
the spare terminal.) Note the polarity of the diode as
shown in figure 12.
d. Connect tip and ring of any key position
(including hold position) to tip and ring,
respectively, of the Series SR PAX System.
TELEPHONE
w
R- K
SECTION 81-082-72
e. Connect
SG lead (or spare lead as shown in figure
12) to the station make-busy terminal of the Series
SR PAX.
f. When telephone is off-hook on the trunk, PAX
station shows busy.
g. If two intercom lines are required on a telephone
the associated make-busy leads must
be tied
together at make-busy terminals in the Series
SR PAX
cabinet (see fig. 12).
h. Replace housing (refer
to par. 4.02).
4.13 Headset Amplifier.
0
<
w
.....
a. An amplifier may be required for the S-C 1807
and 2807 series, desk, S-line, rotary-dial or
pushbutton-dial telephones equipped with an
operators jack to correct for headsets with low
output.
b. The recommended amplifier can be obtained by
ordering S-C package assembly No. 206290-761.
I
I
L_
SERIES 5 R PAX
MAKE BUSY TERMINALS
STRAP IF TWO PAX LINES
ARE TERMINATED AT A
KEY TELEPHONE STATION.
CP 1714 SPARE
TERMINAL (OR ''D' 'CONNECTOR)
*
IF BLACK LEAD IS NOT LONG ENOUGH -ADD STRAP USING A ''D'' CONNECTOR
Figure 12. S-C Series 5R PAX Intercom, Make-Busy Wiring Diagram
lS
TCI Library www.telephonecollectors.info

SECTION 81-082-72
5.
Connections are indicated in figures F0-2 or F0-3
(and package assembly instructions).
c. The amplifier is stored in the telephone housing
away from moving parts
of telephone.
MAINTENANCE
NOTE. For S-C stock number of components
required to maintain telephone instrument, refer to
T-917.
5.01 Network Assembly Replacement.
a. Remove housing (refer to par. 4.02).
b. Disconnect all leads on old network assembly.
c. Remove two network mounting screws located at
upper left and lower right of network assembly.
d. Remove old
network and replace with new one
and secure the
network bracket.
e. Connect telephone leads as shown
in figure F0-1.
f. Replace housing (refer to par. 4.02).
5.02 Line
and Hold Key Assembly Replacement.
16
a. Remove housing (refer to par. 4.02).
b. Loosen two screws holding key assembly to key
mounting bracket.
c. Disconnect the key assembly from
connector plug.
d. Lift key assembly forward and up removing it
from bracket assembly.
e. Place new key in position, reconnect
connector
plug, and tighten two captive screws holding the
key assembly to mounting bracket.
f. Replace housing (refer to par. 4.02).
g. Test each key to ensure that any depressed key
restores when another line key
(or hold key) is
depressed.
5.03 Hookswitch Replacement and Adjustment.
a. Replacement.
1. Order hookswitch assembly.
2. Remove housing (refer to par. 4.02).
3. Disconnect hookswitch leads at terminal board
and
network assembly.
4. Remove hookswitch mounting screws. Remove
top screws. Remove top screw first and slide
network bracket back to expose bottom mounting
screws.
5. Remove
hook and hookswitch assembly.
6.
Turn assembly upside down and hold in an
operated position.
7. Lift spring pusher out. Care must be taken so as
not to damage contact springs.
8. Remove
hook tension spring and shaft, and
remove handset cradle
hook.
9. Connect leads from new hookswitch to
network and terminal board terminals (see fig.
F0-1 to F0-3 as appropriate).
10. Assemble hookswitch assembly and handset
cradle hook by reversing process of step 8.
11. Operate hookswitch assembly and insert spring
pusher.
12. Mount complete assembly
to base with the
three screws removed in step 4.
13. Replace housing (refer to par. 4.02).
b. Hookswitch Tension Spring Adjustment.
1. Remove housing (refer to par. 4.02).
2. Remove handset from hook. Hook should move
to off-hook position.
If not, increase tension
on-hook
by reforming upper spring tab.
TCI Library www.telephonecollectors.info

3. Place handset on-hook to ascertain that
hookswitch restores fully.
4. Replace housing (refer to par. 4.02).
c. Contact Spring Adjustment.
5.04
l. Remove housing (refer to par. 4.02).
2. Check operation of contact springs. Contact
should have a slight follow in operation.
Contacts on the lower and upper spring of a
combination must engage simultaneously.
3.
If necessary, reform contact springs with
standard relay adjusting tool
so that c-d
contacts make first, e-f contacts make second, and
g-h contacts break last. Refer to figures F0-1 to
F0-3 as appropriate.
4. Replace housing (refer to par. 4.02).
Dial Replacement.
NOTE. For repair and replacement parts of S-C
35-type pushbutton dials refer to section 89-922- 70. For
repair and replacement parts of S-C rotary-dials refer to
section 89-925-
70.
a. Remove housing (refer to par. 4.02).
b. Loosen wing screw on right side of dial and slotted
screw on left side
of dial.
c. Disconnect dial leads from network and terminal
board.
d. Replace with new dial and connect leads to
network
as shown in figures F0-1 to F0-3 as
appropriate.
e. Replace housing (refer to par. 4.02).
5.05 Line Lamp Replacement.
a. Remove bezel (refer to par. 4.02).
SECTION 81-082-72
b. Remove plastic retaining collar around key
buttons.
c. Remove key designation cap.
d. Remove key lamp cover.
e. Carefully remove lamp with lamp extractor (S-C
stock No. 896264 or equivalent).
f. Clean metal contact surface of new lamp and
check spring tension and alignment
of lamp
contact springs.
g. Insert new lamp with glass end towards key
button.
h. Replace items removed in steps a through d in
reverse order.
5.06 Handset Replacement.
NOTE. For handset repair and replacement parts
refer to section 89-903-
70.
a. Order handset in applicable color.
b. Remove housing (refer to par. 4.02).
c. Remove dial (refer to par. 5.04).
d. Remove terminal-board mounting screws; make
certain that terminal-board spacers and
lockwashers are not lost.
e. Disconnect handset cord leads from terminals
2, 3,
22, and 23.
f. Replace with new handset assembly or handset
cord, and reconnect leads to terminals
2, 3, 22,
and 23. (See figure F0-1 to
F0-3 as appropriate.)
g. Reposition top terminal board, secure with screws,
spacers, and lockwashers removed
in step d.
h. Replace housing (refer to par. 4.02).
17/18
TCI Library www.telephonecollectors.info

TCI Library www.telephonecollectors.info

* INCLUDES
1800-5B5
1806-5B5
2800-5B5
2806-5B5
1810-5B5
1816-5B5
2810-5B5
2816-5B5
1810-5L5
1816-5L5
2810-5L5
2816-5L5
NOTES:
1. WHEN A COMMON SIGNAL IS REQUIRED USING STANDARD RINGING VOLTAGE, THE
FOLLOWING OPTIONS ARE AVAILABLE:
)
~.
3.
4.
5.
A. s .. c SERI ES 20 STRAIGHT-LINE RINGER. ORDER PACKAGE ASSEMBLY 702100-244,
AND WI RE AS SHOWN. EXCEPTION - WHEN CAPACITOR IS REQUIRED TO BLOCK
DC FROM RINGER, CONNECT RED RINGER NI RE TO NETWORK TERMINAL K AND
STRAP TERMINAL 26 TO NETWORK TERMINAL A.
B. 3-C SERI ES 20 RINGER FOR 60 HZ. ORDER PACKAGE ASSEMBLY 702100-260.
CONNECT BLK WI RE TO TERMINAL 47 AND RED WI RE TO TERMINAL 26. DO NOT
WIRE IN CAPACITOR A-K.
C. TONE RINGER. ORDER PACKAGE ASSEMBLY 202100-488 AND WI RE PER INSTR UC
TION SHEET IN PACKAGE USING TERMINALS 26 AND 47.
WHEN 8-24 VAC BUZZER IS REQUIRED, ORDER S-C Q-20 BUZZER (S-C 703504··023)
AND MOUNT PER INSTRUCTION SHEET ENCLOSED.
FOR INTERCOM SIGNAL TO BE AUDIBLE WHEN OFF HOOK, CONNECT .31 GNAL LEAD TO
TERMINAL-BOARD TERMINAL 21 INSTEAD OF 25.
WHEN TELEPHONE IS USED WITH BUSY STATION NUMBER DISPLAY (24-VOLT LAMPSA
MOVE THE SLT-WHT HOOKSWITCH WI RE FROM TERMINAL-BOARD TERMINAL 24 TO 1
AND ADD AN S-C 827 DIODE (202852-138) AS SHOVvN. WHEN 10-VCLT LAMPS (AND 18-
VAC POWER) ARE USED, ORDER DI ODE PACKAGE ASSEMBLY 206286- 451 AND CHANGE
WIRING PER INSTRUCTION SHEET IN PACKAGE AS3EMBLY.
"B" LEADS MAY BY USED AS SPARES OR MULTI PLED TOGETHER AS A 1 LEADS ON
TERMINAL- BOARD TERMINALS 19 AND 20.
6. TO CONVERT LI NE KEY FROM "Pl CKUP" TO "SIGNAL" FUNCTION, REMOVE PLUNGER
LOCKING SCREW TO MAKE KEY NON LOCKING, AND MOVE THE FOLLOWING WIRE:
A. POSITION 1 - WHT FROM TERMINAL-BOARD TERMINAL 51 TO 52.
B. POSITION 2 - ORN FROM TERMINAL-BOARD TERMINAL 51 TO 52.
C. POSITION 3 - BRN FROM TERMINAL-BOARD TERMINAL 50 TO 52.
D. POSITION 4 - GRN FROM TERMINAL-BOARD TERMINAL 49 TO 52.
E. POSITION 5 - SLT FROM TERMINAL-BOARD TERMINAL 49 TO 52.
7. TO PROVIDE "ALL BUTTONS RELEASED INTERCOM", CONNECT CHAI NI NG SWITCH T,
R, LG AND L LEADS TO INTERCOM CIRCUIT AS SHOWN.
8.
9.
TO PROVIDE MANUAL EXCLUSION (DESK MODELS ONLY). ORDER PACKAGE ASSEMBLY
206289-781 AND WIRE AS SHOWN. (EXAMPLE: LINE 1: CONNECT EXCLUSION SWITCH
BRN, GRN, 3LT LEADS TO TERMINAL··BOARD TERMINALS 27, 28, 29 RESPECTIVELY
AND LI NE CORD EXCLUSION R, T, A LEADS TO EXCLUDED STATI ON(.3) LI NE 1).
WHEN POLARITY GUARD IS REQUIRED FOR TONE-DIAL@SIGNALING UNDER REVERSED
BATTERY CONDITIONS, ORDER PACKAGE ASSEMBLY 703016-852 AND WI RE PER INSTRUC·
TION SHEET IN PACKAGE ASSEMBLY.
703504-051 Sheet 1 Is~,
S-C 9-2C DIAL
PULSE
BL
5-C 180011810 S:?:RIES 5-LINE TELEPHONES •
------
S-C 425E-1 NETWORK
I
I
I
I:
I
HANDSET
'r------r--_l_ ___ _
TERMINAL I HOOKSWITCH
BOARDS I
ION HOOK l
--, ---
1
I S-Y
I MAKES
ls-BRSECci~
- ------.-=-- f
I
SECTION 81-082-72
SIGNALS
r------<~w--t---t-~cGN•l----+----L-------'--~w'---,
I
I
I
OFF
NORMAL
w I I
,----:~-~;- - -h- -,-
---------
S-81<
1 BREAKS I
'----<It---:--~" Is-• LAST g I
. ___ l ________ _I_
·~
~
--- ~-~ --- ___ /
I I
I I
~--------~---t----------~
22 I I R '
r----~~~- I I BK
' I
STRAP
. {NOTE IA)
'----l _____R ____ l_ -- _T~~~S~~~~R--
-*
1
I RINGER
I ( NO;E I)
N~E ~-~---~----'-.
I S-G .MAKES,.. d
~ IS-W FIRST
~ --:---: --~c~------,
21>--~'---~---
I
I a
25>J::----:l_s ---\:-
I NOTE ' b
I
I
I
48
BUZZER
NOTE
2
1-- ___ _.l ___ -
I EXCLUSION
I~
I (NOTE 8 l
©:-=-~---.----'--,
,--=::.=..:.} s : *
Y-0
0-Y
WALL
MODEL
ONLY
SEE
PAGE
3
@o•@o•®r
o•@o•@ f
~---~
I
I
I
V-BL
V-0
Figure F0-1. S-C5-Line Telephone, Wiring Diagram (Sheet 1 of 2)
19/20
TCI Library www.telephonecollectors.info

S-C 35A3 A DIAL
10
BK
17
R-G
w
W-BL
S-C 2800 /2810 SERIES 5-LINE TELE PHONES •
S-C 425E- I NETWORK HANDSET TERMINAL I HOOKSWITCH
BOARDS I (ON HOOK)
w
I
ls-Y
J MAKES
ls-BRSECONO
e
I
,---1;_;;---h--1-
1 BREAKS I
SIGNALS
-----'-----}~·
S-BK
------""'
BREAKS
W LAST
R~CEIVER ~
_ _s.:.~- ___ _,.
.___._,___,,__--{:23 Is-• LAST g I
, ___ )_ ________I __ -
•2 I I
I I
---t--"---;--+------1---+-----~----..-~----,--- --·- ----f- -
• I
WALL
MODEL
ONLY
IT--------'-"'----r-' I I
---+---"---i---+------1----'--=-------'---I I
' I R I
0-BK
TRAP
(NOTE IA)
703504-051 Sheet 2 Issue 2
BK
-----------r--,__~~~~~~___,
I NOTE
I •
I
I
I
I
I
I
I
I
I
26
I
.t I
~ I
~•-• I
l~dl
20 : s-w FIRST c I
I
I
Io
I
I a
2s;r---;-
1
•~_._---',._
I NOTE 3 b
4B
BUZZER
NOTE
2
L----,--- - -
: E~;~TUC~ON I
I
@)0•@0•§1
oR@oRE) I
I
I
I (NOTE 81 I
IR
I BR
._ ____ Y:_·.:-_O_ ~!€E
0-Y 3
Bl-V
'----~~--~
V-0
CONT'D
FROM
PRECEDING
PAGES
CONT'D
FROM
PRECEDING
PAGES
SECTION 81-082-72
KEV 8 CONNECTOR
TE~EPHONE
COfHECTOR
TERMtNAL
BOARDS CONNECTOR
NO. I
TEL LtNE CORD
lw
®
( :
~ i ::: ~51
----''--------------------'-----, I IR-8K
I I IG ___ _
I I ~ T49
I I
.r----ee------<< I I 1 -E-l--if---+--+--+-+-+-f--f--f--'-
1
---{21•>--'--"'"L~-~w~ R
KE y~ =,-: .. =====:::=:=---< :: : :: =--------+--+-+-t-1-1---+-l-;
2
B"---------'---'W=-B,_,L_ 26 T
__._'----+--+-+---< 2 I 2 -----~~ I
POS I • I
W-0 A,H,S
- .,,___ ___ -+-+---< 27 I 2 7-E----+---+-+-+-f-f--f--'-
1
------{~ G _ W 27 (~RlSI
LAMP {~P,~~ !==========~=~======~
13 I
l3 --------+-+-+-<----<---+-I'--<~ W - G
'-..... -38J38 I 31 28 LG
: ·~----+---+----< 28: 2B -! : 33 W-BR 29 T
~·-----+-+-----< 4 I 4 ~- : @- _N_9!_E_51~ 5 B
·""--------e---+--+----<-... 29129 --------+--I-I---+-'----{~ I BL- R 30 (~
1
:i'~1
KEY
POS 2
,. - 3 I 3 -----+-t----+-+-+--+----'---{: 32>>---~•BR-~w 4 R ]
,-:::i---------+-+----< 14 I 14 ! 3'5 I R -BL 6 L
LAMP r~ro~~·+-1-----e-+-+----< 39,39-----L---+-+-l--l---+----'-----{3~6--'--:-"----''-"----~ 31 LG
KEY : :.._ __ _.. --,___+'+----< 3: : 3:------+---+-+-t-r-+----\3771--38--~i ~R--0-~ '" RB
I I o-R ]
POS 3 --'
0
------4-Hl--1-------< 6 6 ~- ~9,L __ o.!._E~ I~
... I I q-G A,H,S
..__--~-+--+-----< 31 31 E----- 40 ~ I BR-R 33 'Lo=ns1
/.~;::i..·-----<----+-+-------<1sl 1s----------t-1----<---+~-\'
LAMP (~: (o_+-1 ___ ___, ____ --1-+-------< 40 I 40 ---------H--1-+----'-----{•4 ,, \---'--~ -"""-'- • .,.,____,.. 34 LG
_ I I s-•
KEY -:-----------~_----..--' I
'O 7
11
7 ___,__---+-+-+---+--'---{42!~I •O R J
I .. --@ : R-S
__,:_~~====~-:=~~~======~ 382: 382 ~ --;191-~~qrE_51 BL- BK~ 35 : S
POS 4
•""------..+-+-----< 33 33 ~--- -----+--1-----+---''--'-~_,44 I BK- BL 3, 26 ~L·::s1
/.~M---------+-+-----< 16116 ~- -----+---+--+--;~ I 0-BK
LAMP (\[~':!---- ... +-+-----<~
41
1
4
i•-~---------+-+--+-'-------<46''---'--:~·-'-K-__,O'--- 37 ~G
I : G- BK
KEY
- ,:'----~ :~=====~:=t~=t======~-:4: ,: _ -~---+-+---1--\1:9,'--~---0-!_E-~---'!---':-:-~-BGK___,,, ;; : J
POSS - 10110 I
• - , <E--------+-1---~39 A,>-1,S
- L-------e---+--+----<, ~:I~: I t1"7' :;~; is tcR1s1
LAMP (fol 42 I 42 ---------Hr---------'-------{02•'--'---='-'----'-- 40 L.G
~~---+-+---<24 124 -I
+4 "-------- -+-+-----<25 I 25 ------+-----~ I
I ,8 ,_ __ __,___,o~-~v~,..
22
KEY ~----~-+--+----<23123-"----+-+------t---r-----<I
HOLO 8 I I
INTERCOM I I
LINE I
LINE 2
LINE 3
L.1 NE 4
LINE 5
/.7''1----------<1>----l-f----<1a I is------+-----1--t--~
1
~ 1e L
LAMP(~ - i43l43....-.. : 0 Y-G >i43 L.G
I I BL-Y
CHAINING
SWITCH
.~----<-HH------<i2ol 20~ ~1------ +--~
1
----{'31\--='----'----- •6 •
: .~----4-H--1------< 45: 45 -----+--------1-----i:C--e :y - BL JI 4 1
: r-----·------<( 2 ii 2 I : : V _ S
~1-~•--------•.----------<'46146----i-----------'----{05i\--'--
1
"-----''---• 50 A l
"'"""
J
-_______
5
YYL:_:_!~B!!jc____
1
1
1
1
~-·j---------- ---c',c-------~:--':-~S,--'-3' :~ ::~::::
-- ------'-----'-'---'-
8
'-'R~ 44 BL(OR) LS
RED I
o-w : ---~~--------'--'--------'----'o._-_w_.,...
2
________ Y._-___,,O ___
1
__ t- _____ : _____ ~ :~~ ~ 42
______ ____Q_:_!_________ - - ---------:i-o 17
BL-V I I I BL-V
-------~~--------- --------~-1 .. ------~ 21
---------'''-'-'-'B'-'L_____ I . II vv:BoL 46
V-0 I
SPARE
SPARE
SPARE
SPA RE
SPARE
I G-v ::
I V-G 48
I BR-V 24
I V-BR 49
: s-v 25
B (OR) A.I
BUZZ ER
BUZZER (GRD)
EXCL R
EXCL T
EXCLA{OR)H
SPARE
SPARE
SPARE
SPARE
SPARE
Figure F0-1. S-C5-Line Telephone, Wiring Diagram (Sheet 1of2)
21/22
TCI Library www.telephonecollectors.info