872a 1m telephone set (touch-a-ma tic® set)

BELL SYSTEM PRACTICES
AT & TCo Standard
SECTION 503-603-102
Issue 2, April 1978
872A 1M TELEPHONE SET
(TOUCH-A-MA TIC® SET)
CONTENTS
PAGE
CONTENTS
PAGE
1.
GENERAL
2
Mounting Cord
18
2.
IDENTIFICATION
2
Network Terminals
18
Design Features
2
Power Supply Board (PSB) Terminals
Optional Features
3
Ordering Guide
4
Operating Features
6
18
3.
INSTALLATION
6
STANDARD INSTALLATION
6
Installation Check Procedure
of
Parts
19
Handset Cradle Removal
19
Housing Removal
20
CONNECTIONS
22
5.
OPERATION
22
9
Record A Number Into Memory
22
Change A Number In Memory
22
Delete A Number From Memory
22
Automatically Dial A Number From
Memory
22
LAST NUMBER DIALED Feature
24
(With
9
9
(2 / 4-Wire
12
D-180818 Kit of Parts (Record Disable
and Dial Intermix Features)
12
Single-Line Service
16
Head Telephone Set
17
COMPONENT LOCATION AND ACCESS
INFORMATION
Location of Components
Faceplate Removal
4.
D-180493 Kit of Parts (Dial Tone
Detector and One-Touch Calling Switch)
D-180494 Kit of Parts
Service)
18
9
OPTIONAL APPARATUS INSTALLATION
D-180568 Kit
Speakerphone)
Line Key Removal
6.
MAINTENANCE
24
Trouble Analysis
24
Battery
25
Memory
25
17
Dial
25
17
6-Button Line Key
25
NOTICE
Not fo r use or disclosure outside t he
Bell System except under written agreement
Printed in U.S.A.
Page 1
SECTION 503-603-102
CONTENTS
PAGE
Ringer
25
Buner
26
Handset Jack
26
Handset
26
Faceplate
26
Speakerphone
27
1.04
The telephone set is available in the following
colors:
• Black (-03)
• Green (-51)
• White (-58)
• Lt. Beige (-60)
1.05
The 872Al (MD) faceplate is available in
only the satin-silver ( -87) color.
1.06
The 872B1 decorative faceplates are available
in the following colors:
• Teak Woodgrain (-108)
1.
• Walnut Woodgrain (-109)
GENERAL
This section contains identification, installation,
connections, operation, and maintenance
information on the 872A1M TOUCH-A-MATIC®
telephone set (Fig. 1).
• Matte Aluminum (-122)
1.01
1.02
This section is reissued to:
• Add D-180818 Kit of Parts (Record Disable
and Dial Intermix Feature)
2.
IDENTIFICATION
The 872A1M telephone set provides all
standard features of a 6-button key telephone
set plus automatic dialing of 31 frequently called
numbers, and a LAST NUMBER DIALED scratch
pad memory.
2.01
• Show 872Al-87 faceplate MD
2.02
• Add 872Bl faceplate and 870Al U upper
housing
• Revise Fig. 1 through 6, 8 through 12, and
14
Design Features:
• Modular key telephone set
• Integrated circuit memory
• Common audible ringing
• Add Fig. 7 and 13
• Buzzer
• Revise Tables A through F, J, K, M, and
N
• Add Tables G, H, I, and L.
Since this reissue covers a general revision, arrows
ordinarily used to indicate changes have been
omitted.
The 872A1M telephone set is factory-wired
for use with lAl, 1A2, or 6A key telephone
systems (KTS). It may be converted (Table K)
for use with lA KTS.
• Busy lamp diode
• Line pickup buttons convertible to nonlocking
signal buttons
• Memory buttons from which to select
preprogrammed telephone numbers for
automatic dialing
1.03
Page 2
• Capability to record and automatically dial
31 telephone numbers of up to 15 digits
each
ISS 2, SECTION S03-603-1 02
Fig. 1-872A1M Telephone Set
• Last number manually dialed memory
• Plug-in battery
• Capability to pause for subsequent dial
tones during automatic dialing (WAIT input).
2.03
Optional Features (Refer to Table
A):
• Decorative Faceplate
• Speakerphone-either 3B or 4A speakerphone
systems may be added to stations
• Dial Tone Detector-automatically starts
dialer when precise TOUCH-TONE® dial
tone (350 Hz and 440 Hz) is present.
• One-Touch Calling, (requires both dial tone
detector and speakerphone)-despressing
one memory button will automatically turn
on speakerphone, detect dial tone, and dial
complete number.
Note: All dial tones encountered in the
process of placing a call must be precise
TOUCH-TONE dial tone, if the call is to be
completed automatically.
• Record Disable-turns off the recording
feature to prevent accidental erasures of
previously stored numbers.
• Dial Intermix-same as record disable feature
plus.
(a) Allows digits dialed from manual dial
and from memory to be intermixed
Page 3
SECTION 503-603- I 02
without having to depress the RECORD
OFF button.
(b) Diables the LAST NUMBER DIALED
feature, and allows that memory position
to be used as any other one.
(c) The 872A1M set is comprised of the following
component parts:
• Housing, 870A1-*
• Housing, Upper, 870A1U-* (used with 872B1
faceplate)
• Station Busy Lamp
• Faceplate, 872A1-87 (MD)
• 2/4-Wire Service
• Faceplate, 872B1-122 (matte aluminum)
• Add-On-Conference
• Handset, G15A-*
• Exclusion (multiline)
• Cord, Handset, H4DU-*
• Bridged Ringing
• "I" Hold
• Base, Telephone Set, 872AM (includes the
following):
• Signaling
Dial, 8EA-119
• Restricted Dialing
Key, 635BT5
• Amplifying Handset
812365039 (P-23F503) Collar
• Head telephone set operation
Ringer, P1B
• End-to-end signaling using 1035C3A (MD)
or 1035AF3A Dial Adjunct (Section 501-164-130).
Network, 425K or 4228-type
Buzzer, KS-20419L1
2.04
All options are implemented by:
Cord, Mounting, D50BB-87
• Wiring changes in the telephone set
Battery, KS-20390L4 or KS-20390L2
• Installation of appropriate additional items.
Jack, Handset, 616B
Ordering Guide:
2.05
Memory, 870B (includes button field)
(a) The 872A1M telephone set is a modular type
telephone set and may be ordered complete
and ready to install as.
• Set, Telephone, 872A1M-*.
841382617 Power Supply Printed Wiring
Board (PSB) Assembly
840393672 Directory Sheet Set
Booklet, Instruction, Subscriber, SIB-2455B
(b) Ordered Separately:
(d) Optional Apparatus (order as required):
• Unit, Power, 95B1 or 95B2 (required for
operation of the automatic dialing feature.
Note: A 95B-type power unit is required
for each telephone set.
Page 4
• Kit of Parts, D-180568 (must be used for
speakerphone service)
• Kit of Parts, D-180493 (Dial Tone Detector
and One-Touch Calling switch)
ISS 2, SECTION S03-603- 102
TABLE A
OPTIONS
ADDITIONAL ITEMS REQUIRED
OPTION
4A
TABLE
108-Type Loudspeaker
11
D,E
680-Type Transmitter
11
D,E
828 Connecting Block
11
D,E
11
D,E
8(C)
D,E
760A Loudspeaker
10
B,C
666B Transmitter
10
B,C
55-Type Control Unit
10
B,C
2012B Transformer
10
B,C
85B1 Power Unit
D-180568 Kit of Parts
Speakerphone•
3B
CONNECTION PER
FIGURE
149B Adapter
One-Touch Calling
Dial Tone Detector
B,C
D-180568 Kit of Parts
8(C)
D-180493 Kit of Parts
8(D,E)
Speakerphone
8(B)
D-180493 Kit of Parts
tl(D)
Station Busy Lamp
9
"!"Hold
9
Signaling
9
Add-On-Conference
9
Bridged Ringing
12
G
K
Amplifying Handset
G6-, G7-, or G8 -Type Handset
Restricted Dialing
446F Diode
Record Disable
D-180818 Kit of Parts
(See Note)
Decorative Faceplate
C,E, or F
H,l
D-180494 Kit of Parts
1 A Key Service
Dial Intermix
CorE
M
Exclusion (Multiline)
2/4 Wire Service•
B,C
8(H)
13
L
872B1 -108 (Teak)t
872B1-109 (Walnut)t
Head Telephone Set
Operation
Plantronics Jack Set Model
JS180-l or JS180-2
Desired Head Telephone Set
Tables provided for
Plantronics Jack Set
• D-K1ts for 2/4 w&re serv&ce and speakerphone are des&gned to mountm the same place
in the set. If both services are to be provided simultaneously, consult your Telco
engineer.
t An 870AIU upper housing may be required (6.11 ).
Note : If set is equipped with an 870A memory, an 870B memory will also be required.
Page 5
SECTION 503-603-1 02
the automatic dialing sequence [used where
access digit(s) required].
• Kit of Parts, D-180494 (for conversion to
4-wire service)
• Kit of Parts, D-180818 (Record Disable and
Dial Intermix)
3.
INSTAUATION
STANDARD INSTALLATION
Note: This kit of parts may be used only
with sets equipped with an 8708 Memory.
• Faceplate, 87281-*
Make all wiring changes and telephone set
modifications (Table A) before external
connections are made to the set (4.01).
3.01
Caution: Do not plug in either battery
or power unit until all connections
and modifications are complete. Take
extreme care not to damage the
exposed components, circuit, etc. when
the set is opened.
Note: If set is equipped with an 872A1-87
faceplate, then an upper housing (870A1U-*)
of the appropriate color must also be ordered.
• Set, Head Telephone [using Plantronics Jackset
Model JS180-1 (2 foot cord) or JS180-2 (7
foot cord)]
The set is shipped from the factory with
the battery disconnected. After all wiring
changes and modifications have been completed,
connect the battery (Fig. 6), by tilting the set up,
and inserting the battery into the mating jack.
3.02
* Add appropriate color suffix (1.04 or 1.06)
2.06
Operating Features (Fig. 2).
• Line key (635BT5), 6-button key. Hold with
five line pickup buttons which are convertible
to nonlocking. An additional momentary
contact (logic rE'set switch) is attached to
the hold side of the key to reset the logic
circuit anytime a key button is depressed.
• 32-button array of low force, low travel,
non locking memory buttons arranged in three
columns. Left and right columns have eleven
buttons, center column has ten buttons.
• LAST NUMBER DIALED button, located in
lower right corner of memory array, when
momentarily depressed, automatically redials
the last number manually dialed.
• RECORD button (nonlocking), when momentarily
depressed, lights the RECORD lamp and
enables the memory circuits to store telephone
numbers.
• RECORD OFF button (nonlocking), when
momentarily depressed extinguishes the
RECORD lamp, indicating that the dialer is
switched out of the record mode.
• WAIT button (nonlocking), when momentarily
depressed during recording operation, enters
a code into memory to initiate a halt in
Page 6
Note: Wire date of installation on label
provided on battery.
Install the 95B-type power unit within 150
feet (24 gauge conductors) of the telephone
set and plug into an ac outlet not controlled by a
switch (continuous ac power is required). A retaining
clamp (841050818) will be shipped with the 958-type
power unit and should be mounted to the ac
receptacle to hold power unit securely and prevent
accidental loss of power. The power unit may be
located at the equipment end of the cable or run
directly into the telephone set by conductors
separate from the mounting cord and connected to
PSB terminals 24 and 25. When separate power
conductors are used, disconnect, insulate, and store
the (BL-V) and V-BL) mounting cord leads from
PSB terminals 24 and 25.
3.03
Danger: Securely attach retaining
clamp to ac outlet using outlet cover
screw BEFORE attempting to install
95B-type power unit. When removing
power unit, always unplug it completely
from the outlet BEFORE attempting
to remove the retaining clamp. This
will prevent the possibility of a loosened
retainer clamp or metallic outlet cover
making contact with the ac prongs
of the power unit when partially
ISS 2, SECTION S03-603-1 02
635 - TYPE
KEY
RECORD
DETAIL REMOVED WHEN
D-180493 OR D-180818
KIT OF PARTS IS
INSTALLED
CAPTIVE HOUSING
SCREW (4)
Fig. 2-872A 1M Telephone Set-Faceplate and Handset Removed
withdrawn from outlet.
Do not use
841050818 or similar retaining clamps
on outlets where the cover mounting
screw holds the duplex outlet in the
box.
The directory sheets (Fig. 2) fit over the
buttons of the memory and are held in place
by the faceplate. Additional sheets are available
in directory sheet set, 840393672.
3.05
3.06
Note: The 958-type power unit must be
located no closer than 1-1/2 feet from the
telephone set in order to prevent a noise
problem.
To designate the 635-type 6-button key.
(1) Use Form 5837 tabs.
(2) Squeeze the key button caps gently and
remove.
(3) Insert the tabs.
The station number card shall be placed in
the plastic fingerwheel of the dial. The
silver disc provided with the dial shall be retained
under the number card.
3.04
(4) Replace the caps so that small bumps on
side of caps are on sides of buttons.
Page 7
7
Tf: fTMI NAL
BOAfTo TB;>
Rg. 3-872<JAO ''''Phooo ,_, IW•h '
Page 8
I
acep ate, Upper Hoosing, Handset, and Handset
Cradle llerno"ed
ISS 2, SECTION 503-603- I 02
Installation Check Procedure
Check telephone set installation per the
following tests (refer to Part 5 for operation).
In case of failure, refer to Table N, Trouble
Analysis.
3.07
(1) Disconnect the power unit and manually dial
a known telephone number to check that
the telephone operates correctly in the absence
of commercial power.
(2) Reconnect the power unit to ac outlet.
(3) With the handset on-hook, record known
telephone numbers, storing consecutive digits
of the numbers in sequential memory locations.
Fill all memory locations except LAST NUMBER
DIALED and location immediately above it[5.01(4)
through (7)].
(4) Automatically dial the telephone numbers
stored in Step (3) by momentarily depressing
the memory buttons in the same sequence in
which the digits were recorded. Verify that
the digits thus dialed produce the expected
telephone numbers.
(9) Momentarily disconnect the power unit (for
5 to 10 seconds). After reconnecting power
unit, momentarily depress memory buttons in
same sequence in which digits were recorded in
Step (3). Verify that the correct telephone
numbers are dialed.
(10) Dial the appropriate code for ring-back to
test the ringer.
(11) Check operation of the logic reset switch
by pressing the RECORD button (RECORD
lamp will come on) and subsequently pressing
an unoperated line button. (RECORD lamp
must go out.)
(12) If equipped with one-touch calling option,
(D-180493 Kit of Parts and speakerphone),
and with set in on-hook condition, depress the
memory button used in Step (5). The speakerphone
should turn on, dial tone should be detected,
and the stored number should be automatically
dialed.
OPTIONAL APPARATUS INSTALLATION
D- 180568 Kit of Parts (Speakerphone)
(5) Go off-hook and simultaneously manually dial
and record a known telephone number into
memory location immediately above LAST
NUMBER DIALED button [5.01 (4) through (7)].
(6) Momentarily hang up handset and then
automatically dial the number recorded in
Step (5).
(7) Go off-hook and manually dial a known
telephone number with aWAIT input inserted
in the telephone number.
(8) Momentarily hang up the handset and then
automatically dial the number by depressing
the LAST NUMBER DIALED button. The set
should stop dialing when it reaches the stored
WAIT input. Depress the LAST NUMBER
DIALED button again and the remaining digits
should be dialed.
The battery and power unit must be
connected a minimum of five minutes
before doing Step (9).
3.08
To install.
(1) Proceed as described in 3.17.
(2) Make connections per one of the appropriate
Tables, B through E.
(3) Mount the kit assembly to the chassis with
the screws provided (Fig. 4). Beveled corner
of printed wiring board (PWB) should be at
lower right corner.
D-180493 Kit of Parts (Dial Tone Detector and
One-Touch Calling Switch)
3.09
To install.
(1) Remove the housing (3.21), and access PSB
terminal board (3.17).
(2) Insert the board assembly from the back of
the set and locate as shown in Fig. 4, such
that the two tabs on the board assembly fit into
the slots in the bottom of the chassis.
Page 9
SECTION 503-603- 102
TABLE B
CONNECTIONS- 872A1M TELEPHONE SET WITH 38 SPEAKERPHONE
DESIG
8
7
2
A
1
M
T
e
I
s
e
t
D-180568
Kit
of
Parts
666B
TRMTR
(T7A Cord)
760A Lspk
(R2FK Cord)
CONNECT
LEAD
APPARATUS
872A1M
TEL. SET
INOTE 1}
COLOR
FROM
TOPSB
TERM.
FROM
TO
CONT
UNIT
149BADPT
IDIOR
CORD}
558
V·G
*
2
19
1
SA
Rl
G·V
*
9
28
10
7A
12
2
Al
5
11
12A
Al
*
Ft
LK
v-s
s-v
*
13
11
35
11A
P3
V-BR
*
3
21
4
lOA
P4
BR-V
*
6
30
13
9A
Ror Rl
18
34
lB
Ror Rl
9
25
lA
B or Bl
17
33
2B
B or Bl
8
24
2A
AG
LK
BL-R
SHi
G-W
14
SHa
R· BL
16
17
13
VDD
W·G
Ml
S·BK
4
7
Pl
BL·R
13
8
-15V
BK·S
14
16
s
Q-BK
3
18
Al
Y·O
29
19
Fl
G-Y
2
17
LK
BK·O
11
35
SPl
G
34
20
SP2
R
33:j:
29:j:
95Bl
Pwr Unit
ACl
3B§
AC2
4B §
2012B
Trnsf
ACl
27
27
AC2
36
36
*Insulated and stored.
tTerminal on network.
:j:To reduce loudspeaker volume, move SP2 lea,d to terminal 24(55A) or 30(55B).
§Insulate and store (BL·V) and (V·BL) leads in connector cable.
Note : Plug telephone set mounting cord into 149B adapter.
Page 10
TERM.
55 A
Tl
ISS 2, SECTION 503-603-102
TABLE C
CONNECTIONS- 872A1M TELEPHONE SET WITH ONE-TOUCH CALLING USING 38 SPEAKERPHONE
CONNECT
872A1M
TEL SET
(NOTE 1)
LEAD
APPARATUS
DESIG
COLOR
FROM
Tl
V·G
Rl
G·V
•
•
FROM
T
e
)
s
e
t
D-1804 93
Kit
of
Parts
(Note 2)
0 ·180568
Kit
of
Parts
AG
V·S
LK
S·V
SPO
0-V
P3
V·BR
P4
BR·V
•
•
•
•
•
CDNT
UNIT
TO PSB
TERM.
55 A
558
2
19
1
SA
9
28
10
7A
12
2
Al
Ft
5
11
12A
13
11
35
11A
21
3
18
5B
•3
21
4
lOA
9A
Al
8
7
2
A
1
M
TO
1498 ADPT
(DIOR
CORD)
TERM.
30
13
R or Rl
18
34
lB
R or Rl
9
25
lA
B or Bl
17
33
2B
B or Bl
8
24
2A
6
STRAP
BK
PSB·11
•
STRAP
BK
PSB-18
•
STRAP
BK
PSB-23
INPUT
G· R
CONN
CABLE AT
KEY EQUIP.
COLOR
TO
O·V
•
*
2
PB
O·BK
7
INPUT
G· R
9
DT
0 -Y
11
LK
Y·G
13
VDD
R· O
17
SPR
Y· BL
18
DR
Y· O
19
COM
BK·O
20
SPO
G-Y
21
PL
0-R
22
OTT
BL·Y
23
Switch
s
s
15
LK
BL-R
13
20
SHi
G·W
14
SHa
R· BL
16
VDD
W·G
17
Page 11
SECTION 503-603- I 02
TABLE C (Cont)
CONNECTIONS- 872A1M TELEPHONE SET WITH ONE-TOUCH CALLING USING 38 SPEAKERPHONE
CONNECT
LEAD
APPARATUS
DESIG
COLOR
872A1M
TEL SET
tNOTE 1)
FROM
M1
6668
Trans
(T7A Cord)
760A
Lspk
(R2FK Cord)
9581
Pwr Unit
20128
Trnaf
TOPSB
TERM.
FROM
TO
1498 ADPl
IDIOR
CORD)
CONT
UNIT
55 A
558
S·8K
4
7
P1
8L-R
13
8
-15V
8K·S
14
16
s
0·8K
3
18
A1
Y-0
29
19
F1
G-Y
2
17
35
LK
8K·O
11
SP1
G
34
20
SP2
R
33t
29t
TERM.
CONN
CABLE AT
KEY EQUIP.
COLOR
AC1
38
8L·V
AC2
48
V·BL
AC1
27
27
AC2
36
36
TO
•
•
*Insulated and stored.
tTerminal on network.
tTo reduce loudspeaker volume, move SP2 lead to terminal 24 (55A) or 30 (558).
Notes:
1. Plug telephone set mounting cord into 1498 adapter.
2. All dial tones encountered in the process or placing a call must be precise TOUCH-TONE dial tone.
(3) Lock the board into position by inserting
the self-threading screw through the right
side of the chassis.
(4) Mount the one-touch calling switch below
the dial with the two screws provided.
(7) Verify correct operation of option.
(8) Reassemble set.
D-180494 Kit of Parts (2/4-Wire Service)
3.10
Note: If switch for D-180818 Kit of Parts
is already present, the one-touch calling switch
can not be installed. The PSB terminals to
which the switch leads are normally connected
(Table C or E), shall be strapped together.
(The one-touch calling option can not be turned
off by the subscriber.)
To install.
(1) Proceed as described m 3.17.
(2) Make connections per Table G.
(3) Mount the kit assembly to the chassis with
the screws provided (Fig. 4).
(5) Make connections per Table C, E, or F.
D- 180818 Kit of Parts (Record Disable and Dial
Intermix Features)
(6) Break off the detail at the bottom of the
cover (Fig. 2) and trim edge as required.
Page 12
3. II
To install.
ISS 2, SECTION 503-603-102
TABLED
CONNECTIONS- 872A1M TELEPHONE SET WITH 4A SPEAKERPHONE
872A1M
TEL
SET
LEAD
APPARATUS
DESIG.
COLOR
FROM
TOPSB
TERM.
T1
V·G
•
2
R1
G·V
•
9
AG
V·S
*
Ft
LK
s-v
•
P3
V·BR
•
3
P4
BR·V
•
6
1).180568
Kit
of
Parts
t
CONN
CABLE
AT KEY
EQUIP
COLOR
TO
(Note 2)
A1
872A1M
Tel Set
828
CONN
BLK
INOTE 1t
13
13
LK
BL·R
SHi
G-W
14
SHa
R-BL
16
17
VDD
W-G
85B1
POWER UNIT
AC1
AC1
AC2
BK
y
95B-TYPE
POWER UNIT
AC1
R
21
BL·V
•
AC2
G
46
V·BL
*
AC1
Strap
AC1 to 24
BR·V
AC1
AC2
Strap
AC2 to 49
V-BR
AC2
85B1
POWER UNIT
§
95B-TYPE
POWER UNIT
AC2
AC1
BL-V
AC1
AC2
V-BL
AC2
• Insulated and stored.
tTerrninal on network.
:j:Preferred power connections.
§AJternate power connections.
Noles:
1. Plug mounting cords of telephone set, 108-type loudspeaker, and 680·type transmitter into
82B connecting block. Install option plug in ringer cutoff mode.
2. For 1 A1 or 1 A2 KTS, connect link between 2 and Al. For 1 A KTS, connect link between
19 and Al.
(1) Remove faceplate (3.19).
(4) Remove the two dial mounting screws and
move dial aside.
(2) Loosen the captive screw at the bottom of
the cover around the dial and remove the
cover.
(5) Rotate left edge of memory upward as
shown by Fig. 5.
(3) Disengage the four captive memory mounting
screws (Fig. 4).
Note: If set is equipped with an 870A
memory, replace it with 870B memory, and
carefully pack and return the old memory
according to local procedures.
Page 13
SECTION 503-603-1 02
TABLE E
CONNECTIONS- 872A 1M TELEPHONE SET WITH ONE-TOUCH CALLING
USING 4A SPEAKERPHONE
872A1M
TEL
SET
LEAD
APPARATUS
DESIG
COLOR
FROM
TDPSB
TERM
T1
V-G
•
2
R1
G-V
•
9
AG
V-S
Ft
LK
S-V
SPO
0-V
6
D-180493
Kit
of
Parts
(Note 3)
(Note 4)
D-180568
Kit of
Parts
t
85B1
PWR UNIT
95B-TYPE
PWR UNIT
Page 14
COLOR
TO
(Note 2)
A1
872A1M
Tel Set
CONN
CABLE
AT KEY
EQUIP.
828
CONN
BLK
(NOTE 1)
P3
V-BR
•
•
•
•
P4
BR-V
•
Input
G-R
2
PB
0-BK
7
13
21
Strap
10 to 35
0-V
•
•
•
3
Input
G-R
9
DT
0-Y
11
13
LK
Y-G
VDD
R-0
17
SPR
Y-BL
18
DR
Y-0
19
COM
BK-0
20
SPO
G-Y
21
PL
0-R
22
DTT
BL-Y
23
Switch
s
s
15
LK
BL· R
13
SHi
G-W
14
SHa
R·BL
16
VDD
W-G
17
AC1
BK
AC1
AC2
y
AC2
AC1
R
21
BL-V
AC2
G
46
V-BL
20
ISS 2, SECTION S03-603- I 02
TABLE E (Contd)
CONNECTIONS- 872A1M TELEPHONE SET WITH ONE· TOUCH CALLING
USING 4A SPEAKERPHONE
872A1M
TEL
SET
LEAO
APPARATUS
DESIG
COLOR
FROM
CONN
CABLE
AT KEY
EQUIP.
828
TOPSB
TERM
CONN.
BLK
(NOTE 1)
COLOR
TO
BR·V
AC1
85B1
PWR UNIT
AC1
Strap 24·AC1
AC2
Strap 49·AC2
V·BR
AC2
95B·TYPE
PWR UNIT
AC1
BL·V
AC1
AC2
V·BL
AC2
§
* Insulated and stored.
t Terminal on network
t Perf erred power connections.
§ Alternate power connections.
Notes :
1. Plug mounting cords of telephone set, 108·type loudspeaker, and 680· type transmitter into 82B
connecting block. Install option plug in ringer cutoff mode.
2. For 1A1 or 1A2 KTS, connect link between 2 and Al. For 1A KTS, connect link between 19 and Al.
3 . Remove (BK) strap leads between PSB terminals 11 and 17 ; 17 and 23 ; and 18 and 20 .
4. All dial tones encountered in placing a call must be precise TOUCH·TONE dial tone.
(6) Mount switch below dial using the two screws
provided.
Note: If the one-touch calling switch (D-180493
Kit of Parts) is already present, it must be
removed. The PSB terminals to which the
switch leads were connected (Table C or E),
must be strapped together. (The one-touch
calling option can no longer be turned off by
the subscriber.)
(7) Connect switch lead connectors to post
terminals on memory board per Table L.
(8) With feature switch in OFF position, verify
that set operates in normal manner.
• Numbers can be recorded into memory
• Numbers can be changed
• Numbers can be deleted from memory.
(9) Set feature switch to ON position and verify
feature provided.
• Record disable feature, only.
Page 15
SECTION S03-603- 102
TABLE F
CONNECTIONS- 872A1M TELEPHONE SET
WITH DIAL TONE DETECTOR ONLY (SEE NOTE)
872A1M
TEL SET
LEAD
FROMPSB
TERM.
APPARATUS
DESIG
872AlM
Tel Set
Strap
BK
11
Strap
BK
23
0·180493
Kit
of
Parts
COLOR
TO PSB
TERM .
•
•
Input
G·R
2
PB
O·BK
7
Input
G·R
9
DT
O·Y
11
LK
Y·G
•
VDD
R·O
17
SPR
Y·BL
DR
Y·O
19
20
•
COM
BK-0
SPO
G-Y
•
PL
O·R
22
DTT
BL·Y
23
Switch
s
s
t
*
*
*Insulate and store.
tSwitch not required when speakerphone is not provided.
Note:May be used for a pplications where first dial tone is not
precise (350Hz and 440Hz) but all subsequent dial tones must
be precise if number is to be dialed automatically.
(a) RECORD lamp will not light when
RECORD button is depressed.
(b) No telephone numbers can be recorded,
changed, or deleted in memory.
(d) Manually and automatically dialed digits
may be intermixed.
(10) Reassemble set
Single-Line Service
(c) LAST NUMBER DIALED feature is
operative.
• Record disable and dial intermix features.
(a) RECORD lamp will not light when
RECORD button is depressed.
(b) No telephone numbers can be recorded,
changed, or deleted in memory.
The 872A1M-type TOUCH-A-MATIC telephone
set is available from the factory as a single
line set. However, with the addition of an 870B1
faceplate, the 872A1M telephone set may be converted
to single line service as follows.
3.12
(1) Remove the faceplate, key collar, and all
buttons of the 635-type key.
(2) Gain access to terminal area (3.17).
(c) LAST NUMBER DIALED feature is
disabled.
Page 16
(3) Remove the cradle (3.20).
ISS 2, SECTION 503-603-102
(4) Make connections per Table H.
TABLE G
CONNECTIONS FOR 2/4-WIRE SERVICE
APPARATUS
872AlM
Tel Set
D-180494
Kit of
Parts
COLOR
REMOVE
FROM
CONNECT
TO
BK-G
GN
Ll
(5) Reassemble set and install an 870B1 faceplate
of the appropriate color.
Note: If set was originally equipped with
an 872Al-87 faceplate, refer to 6.11.
BK
R
•
BR·V
•
PSB-13
V·BR
•
PSB-21
v
s
T
BR
•
Y -BR
L1
BL·R
GN
G-BK
PSB-13
R· BR
R
Head Telephone Set
3.13
F
To install.
(1) Remove housing (3.21).
R-0
s
BL·Y
PSB-21
*Insulate and store.
(2) Access PSB terminal area (3.17).
(3) Remove cradle (3.20).
(4) Thread jack set cord through hole in rear
of housing and make connections per
appropriate table provided for Plantronics Jackset.
(5) Reassemble telephone set.
TABLE H
CONNECTIONS FOR CONVERSION TO SINGLE
LINE SERVICE WITH BRIDGED RINGING
(6) Insert head telephone set plug into jack set.
Other optional components may be
LEAD
DESIG
COLOR
Tip
W-BL
REMOVE
FROM
CONNECT
TO
PU-3)
Net. K
PU-6)
TB1·13
Ring
BL-W
* (1
* (1
B1
Y-S
Net. K
R1
S-Y
TB1-13
A-Lead
W-0
* (1
Hold
Y-BL
TB1 -3
LRS-1
w
PSB-20
PU-1)
.•
•
•
COMPONENT LOCATION AND ACCESS INFORMATION
Location of Components
3.14
The components are located in three areas
as follows.
(a) Under the handset cradle (Fig. 3):
TABLE I
CONVERSION TO BRIDGED RINGING ON FIRST
LINE WITH 6-BUTTON KEY SERVICE
• Buzzer
• Ringer
DESIG
COLOR
REMOVE
FROM
Tip
W-BL
( I PU-3 )*
Net. K
TBL -13
Rin g
BL-W
(1 PU-6)*
B1
Y-S
Not. K
R1
S- Y
TBL - 13
* lns ulat<' and sto re .
sets, etc. Refer to the appropriate
section for connection information
for these components.
TB1-1
*Insulate and store.
LEAD
used such as SPOKESMAN», loudspeaker
CONNECT
TO
.
•
• Switchhook assembly
• Handset jack
• Terminal boards (TBl and TB2).
Page 17
SECTION S03-603- 102
(b) Under the faceplate, inside the set (Fig. 4
and 5):
(2) Loosen the captive cover screw at the bottom
of the white cover around the dial (Fig. 2).
• Battery jack (Fig. 5)
(3) Remove the cover.
• Power supply board (PSB) terminal area
(Fig. 4)
(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.
• Network (Fig. 4)
• Options (Fig. 4):
D-180568 (relay kit for speakerphone)
Power Supply Board (PSB) Terminals
D-180493 (dial tone detector and one-touch
calling switch kit)
3.17
To access the terminal field on the power
supply board, proceed as follows.
D-180494 (2/4-wire relay kit)
(1) Remove the faceplate (3.19).
D-180818 (record disable and dial intermix
switch).
(2) Loosen the captive cover screw at the bottom
of the white cover around the dial (Fig. 2).
(c) Under the telephone set (Fig. 6):
• Battery.
(3) Remove the cover.
(4) Remove the two screws that hold the dial
in place.
Mounting Cord
(5) Gently raise the dial and move aside.
The D50BB-87 mounting cord is am phenol
ended at the equipment end and equipped
with 508-type plugs for terminating on the back
of the 635-type module at the telephone set end.
The conductors terminated in the 508-type plugs
provide the major line service requirements.
Spade-tipped conductors are provided for auxiliary
control functions or options and are terminated
directly on associated equipment, terminal boards,
or stored.
3. 15
(6) To reassemble; reverse procedure.
(7) 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.
Line Key Removal
Note: Sets manufactured prior to fourth
quarter 1976 were equipped with D50AM-87
mounting cords. The major difference in the
cords is that TIP and RING contact strips
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
3.18
To remove, use the following procedure.
(1) Remove faceplate (3.19).
(2) Push the key toward the rear of the set to
unlock it from the tabs.
(3) Raise the metal plate of the key just above
the tabs and move the key toward the left,
then raise the right end of the key until it clears
the chassis of the set.
For access to the network terminals.
(1) Remove the faceplate (3.19).
Page 18
Caution: Do not damage contact strips
which protrude from the right side
ISS 2, SECTION 503-603-1 02
PSB
TERMINAL AREA
ONE-TOUCH
CALLING SWITCH
OF 0-180493
KIT OF PARTS
(OPTIONAL)
Fig. 4-872A 1M Telephone Set-Dial Removed To Show Terminal Area
of the key or logic reset switch
attached on HOLD side of key. (These
contact strips will only be found on
sets equipped with D50AM-87 mounting
cords.)
(4) Lift the key completely out of the set.
(5) Replace key by reverse procedure.
Note: The 872B1 faceplate is not a direct
replacement for the 872A1-87 faceplate. An
870A1U upper housing is also required with
the 872B1 faceplate (6.11).
(b) The 872A1-87 faceplate is held in place by
two snaps bonded to the faceplate and aligned
to fit holes in the chassis. To remove the
faceplate, grasp it by any convenient edges and
lift.
Faceplate Removal
Handset Cradle Removal
3.19
Removal will differ depending on faceplate
provided.
(a) The 872B1-type faceplate is held in place
by a spring clip attached to the 870A1U
upper housing. To disengage the faceplate, lift
up on the tab which protrudes from the center
of the back edge of the faceplate.
3.20
To remove the handset cradle from the
housing, proceed as follows.
(1) Remove the faceplate (3.19), and place the
handset aside.
(2) Remove upper housing, if provided, [3.21(b)].
Page 19
SECTION 503-603-1 02
LOGIC RESET
SWITCH
Fig. 5-872A1M Telephone Set, Overall Internal View
(3) Disengage the captive cradle screws located
in the two tabs on the cradle (Fig. 2).
(4) Lift the cradle by pulling up on the plunger,
and remove.
(a) Lower housing.
(1) Unplug the handset cord, at the telephone
set end, and remove handset.
(2) Remove the faceplate (3.19).
(5) Replace the handset cradle by sliding it
sideways to engage the clips with the mating
tabs in the side of the housing.
Caution: The plunger must be held
from the top side of the cradle as it
is slid into position to prevent damage
to the switchhook arm.
(6) Refasten the captive cradle screws.
(3) Remove the handset cradle (3.20).
Caution: Attempting to remove the
housing without removing the handset
cradle may damage the switchhook
arm.
(4) Disengage the four captive housing screws,
(Fig. 2), one located in each corner of
the upper housing.
Housing Removal
3.21
To remove, proceed as follows.
!'age 20
(5) Separate the housing from the telephone
set base.
ISS 2, SECTION 503-603-102
Fig. 6-872A 1M Telephone Set, Bottom View
(6) Feed mounting cord through hole in bottom
of housing as housing is removed.
(b) Upper housing.
(1) Remove the faceplate (3.19).
(7) Before replacing the housing, lift the set
to check that the shoulders of the battery
jack are against the two tabs of the chassis.
Misalignment may cause the bottom of the
housing to bow.
(2) Disengage the captive housing screws
located in each corner of the upper
housing, (Fig. 2). This will release the lower
housing.
(8) When replacing the housing, keep the
handset jack from being trapped between
the housing and chassis
(3) Pull the upper housing away from the
chassis as each housing screw is backed
out. This will separate the upper housing
from the chassis.
Page 21
SECTION 503-603-1 02
(b) Push the WAIT button when the RECORD
lamp relights. (The WAIT entry counts
as one digit.)
(4) If necessary, thread screws out of housing.
(5) To reasemble, reverse procedure.
(c) Dial the telephone number.
4.
CONNECTIONS
4.01
Note: A number up to 15 digits in length
may be recorded. The RECORD lamp will
go out momentarily as each digit is dialed.
If exactly 15 digits are recorded, the RECORD
lamp will go out and stay out, indicating that
the dialer has been reset. If a memory button
has not been depressed, the RECORD lamp
will go out when the first digit is dialed and
recording operation will be voided.
Telephone set connections are shown in
Fig. 8 and Table J.
Caution:
Some conductor assignments
are not standard (Table J).
4.02
Refer to Table A for connection information
for all options.
4.03
A partial functional schematic is shown in
Fig. 14.
5.
OPERATION
(7) Depress the RECORD OFF button if less
than 15 digits are recorded. The RECORD
lamp will go out. The dialer will be reset. The
number is now stored in the selected memory.
The dialer can also be reset by a switchhook,
line key, or speakerphone operation.
Record A Number Into Memory
Change A Number In Memory
5.01
To record.
(1) Remove the faceplate (3.19).
Whenever a new number is recorded in a
previously used memory position, it will
automatically replace the previously stored number.
(2) Write or type the desired name and telephone
number for a selected memory button on
the associated position of the directory sheet.
Delete A Number From Memory
5.02
5.03
Complete the following operations in succession.
(3) Replace the faceplate.
(1) Depress the RECORD button.
(4) Depress the RECORD button. The RECORD
lamp adjacent to the RECORD button will
light. (A number can be called and recorded
simultaneously by lifting handset before depressing
the RECORD button.)
Note: If set is equipped with the D-180818
Kit of Parts, feature switch must be placed
in the OFF position.
(5) Depress the specific memory button adjacent
to the desired telephone number listed on
the directory sheet.
(6) Manually dial the desired telephone number.
If an access code and a pause for second
dial tone is required.
(a) Dial the access digit(s) for the outside
line.
Page 22
(2) Depress the memory button corresponding
to the name and number to be deleted.
(3) Depress the RECORD OFF button.
Automatically Dial A Number From Memory
5.04
To automatically dial a number.
(a) For factory-wired sets go off-hook, listen
for dial tone, and depress the desired
memory button. If a WAIT input has been
recorded, automatic dialing will stop. When
second dial tone is heard, depress memory button
again to complete automatic dialing.
(b) For sets equipped with dial tone detector
only, go off-hook, listen for dial tone and
depress the memory button.
ISS 2, SECTION S03-603- 102
TOUCH-A-MATIC
TELEPHONE
SET
I
117 VAC
( NOTE S
1 ANO 4)
D-STATION WIRE
---(NoiTi)
______ _.. I
MOUNTING CORD
1498 ADAPTER
(NOTE 2)
TO KEY TELEPHONE SYSTEM
(NOTE 2)
3B
/fl>
117 VAC
(NOTES
1 AND 4)
A25B CABLE
TO KEY TELEPHONE SYSTEM
(NOTE 2)
NOTES'
I. THE 95B -TYPE PO\IER UNIT MAY BE CONNECTED
TO AC PO\IER AT SET LOCATION, AT 149B
ADAPTER OR 66£3-25 CONN. BLOCK, OR AT KEY
EQUIPMENT END. SEE PARA. 3.03.
2. IF THE PO\IER UNIT IS TO BE CONNECTED AT
THE 149B ADAPTER OR THE 66E3-25 BLOCK,
INSULATE AND STORE THE (BL-V) PAIR AT THE
KEY EQUIPMENT END.
l. INSULATE AND STORE THE (BL-V) AND (V-llL)
MOUNTING CORD LEADS FI{)M PSB TERMINALS.
4. A 958-TYPE P()'..<t.R UNIT IS REQUIRED FOR EACH
TELEPHONE SET.
66E3-2~
CONN BLOCK
(NOTE 2)
: :
0-STATION
LL_.:::'I~E ___
_
11 7 VAC
(NOTE S
1 AND 4)
, . - - - - - - - c.o.
NUMBERS IN PARENTHESES I NO I CA TE
CONNECTOR PIN NUMBERS
KEY TELEPHONE SYSTEM
41
~--
~--
O-S TAT I ON
--..
WIR[
__.>--- -- -
117 VAC
(NOTES
1 AND 4)
66B4 -2 5 CONN BLOCK
OR EQUIVALENT
Fig. 7 -872A 1M Telephone Set, Alternate Power Connection Method
Page 23
SECTION 503-603-1 02
(c) For sets equipped with the one-touch calling
option (with speakerphone and dial tone
detector), simply depress the memory button.
(5) Manually dial telephone number.
(6) To redial same number automatically.
(a) For factory-wired sets, go off-hook,
listen for dial tone and depress LAST
NUMBER DIALED button. Automatic
dialing will stop at the recorded WAIT
input. When second dial tone is heard,
depress LAST NUMBER DIALED button
again to complete automatic dialing.
LAST NUMBER DIALED Feature
The TOUCH-A-MATIC telephone set
automatically records into the LAST NUMBER
DIALED position (Fig. 1) any number dialed using
the standard telephone dial. Each number in the
LAST NUMBER DIALED position is automatically
replaced by the next number manually dialed.
Although the unit is recording, the RECORD lamp
does not light at any time during this operation.
5.05
5.06
(b) For sets equipped with the dial tone
detector only, go off-hook, listen for
dial tone, and depress LAST NUMBER
DIALED button.
Operation of LAST NUMBER DIALED
feature.
(c) For sets equipped with the one-touch
calling option (with speakerphone and
dial tone detector), simply depress the
LAST NUMBER DIALED button.
(a) With no access digit(s) required.
(1) Go off-hook.
(2) Listen for dial tone.
6.
(3) Manually dial telephone number.
6.01
(4) To redial same number automatically.
(a) For factory-wired sets, go off-hook,
listen for dial tone and depress LAST
NUMBER DIALED button.
(b) For sets equipped with the dial tone
detector only, go off-hook, listen for
dial tone, and depress the LAST NUMBER
DIALED button.
(c) For sets equipped with the one-touch
calling option (with speakerphone and
dial tone detector), simply depress the
LAST NUMBER DIALED button.
MAINTENANCE
In case of power failure, the automatic dialing
feature cannot be used. The battery retains
the number associated with each of the memory
buttons for at least 24 hours. If power loss exceeds
24 hours, the numbers may have to be rerecorded.
Trouble Analysis
6.02
When trouble is encountered, the subsequent
procedure should be followed.
(1) Confirm improper operation either as a basic
telephone set or as an automatic dialer
(Part 5).
(2) Check for improper connections.
(3) Refer to Table N, and the following paragraphs.
(b) When an access code and pause for second
dial tone is required.
(4) If remov~l of set is required, proceed as
follows:
(1) Go off-hook.
(a) Disconnect telephone set.
(2) Listen for dial tone.
(b) Unplug battery.
(3) Dial access digit(s).
(4) Depress WAIT button, after second dial
tone is heard.
Page 24
(c) Place battery plug sideways into housing
slot below battery jack and tape into
place.
ISS 2, SECTION 503-603-102
Caution: Failure to restrain plug can
result in plug damage necessitating
battery replacement.
(7) Test per 3.07
Dial
6.05
Battery
The KS-20390L4 or L2 battery has an
expected life of about 4 years. It can be
replaced without loss of memory provided commercial
ac power to the set is continously maintained. To
replace the battery, proceed as follows (Fig. 6).
6.03
To replace.
(1) Access PSB terminal area per 3.17.
(2) Disconnect dial leads and remove dial.
(3) Install new dial by reverseing procedure.
(1) Tilt the front of the set up.
6-Button Line Key
(2) Unplug the battery.
6.06
To replace.
(3) Loosen the captive screw on the battery
support.
(1) Remove key per 3.18.
(4) Remove battery support.
(2) Access PSB terminal area per 3.17.
(5) Remove battery.
(3) Disconnect logic reset leads from PSB
terminals 10 and 20.
(6) Install new battery.
(7) When battery has been connected at least
five minutes, check memory retention by
momentarily disconnecting ac power and then
automatically dialing a known telephone number.
Memory
6.04
The memory may be replaced in the following
manner.
Note: Removal of the memory results in
loss of stored telephone numbers.
(1) Remove the faceplate (3.19).
(4) Remove the 508-type plugs and (if provided)
the two contact strips from the back of the
key.
(5) Install new key.
(6) Reassemble the set.
(7) Test for operation of the logic reset switch
[3.07(11)].
Ringer
6.07
To replace.
(2) Loosen the four captive memory mounting
screws (Fig. 4).
(1) Remove the faceplate (3.19) and place the
handset aside.
(3) Rotate the left edge of the memory upward
as shown in Fig. 5.
(2) Remove upper housing, if provided, [3.21(b)].
(3) Remove the cradle (3.20).
(4) Disengage the connector by pulling it
perpendicular to the printed wiring board.
(4) Disconnect the ringer leads (Fig. 81).
(5) Replace the memory. Do not twist the gray
power supply cable. It should form a loop
as shown in Fig. 5 when connected to the board.
(5) Tilt the front of the set up.
(6) Reassemble set.
(7) Remove ringer.
(6) Unfasten ringer mounting screws (Fig. 6).
Page 25
SECTION 503-603- 102
(8) Replace new ringer and assemble in reverse
order. The leads should be routed as shown
in Fig. 3 to prevent contact with the gong and
subsequent damping of the ringer output.
Buzzer
6.08
To replace.
Handset
A defective G15A handset may be replaced
or changed to a modular amplifing handset
(G6BM, G7BM, or G8BM) by unplugging the H4DU
cord and inserting it into the new handset. To replace
the G15A handset with a nonmodular amplifying
handset (G6B, G7B, or G8B) proceed as follows.
6.10
(1) Remove the faceplate (3.19) and place handset
aside.
(1) Unplug H4DU handset cord at telephone set
end.
(2) Remove upper housing, if provided, [3.21(b)].
(2) Remove faceplate (3.19) and place handset
aside.
(3) Remove the cradle (3.20).
(3) Remove upper housing, if provided [3.21(b)].
(4) Remove the buzzer mounting screw.
(4) Remove handset cradle (3.20).
(5) Remove the mounting screw and spacer for
TB1 (Fig. 3).
(6) Move terminal board TB1 to gain access to
the appropriate terminals on TB2.
(7) Remove appropriate leads (Fig. 8H).
(8) Reassemble. When replacing TB1, locate
its tabs in the slots of the chassis before
refastening the TB1 mounting screw.
Handset Jack
6.09
To replace.
(5) Disconnect 616B handset jack (6.09). (Jack
may be removed or stored just to right of
ringer.)
(6) Insert spade-tipped end of handset cord
through hole in the side of the housing.
(7) Attach stayband hook to chassis.
(8) Route leads through wire guide as shown in
Fig. 3.
(9) Make connections (Fig. 8H).
(10) Reassemble set.
(1) Remove the faceplate (3.19) and place handset
aside.
Faceplate
(2) Remove upper housing, if provided, [3.21(b)].
6.11
To replace an 872A1-87 faceplate with an
872B1 faceplate.
(3) Remove the cradle (3.20).
(4) Remove the mounting screw and spacer for
TB1 (Fig. 3).
(5) Move terminal board TB1 to gain access to
the appropriate terminals on TB2.
(6) Disconnect the appropriate leads (Fig. 8H)
and remove jack.
(7) Reassemble. When replacing TB1, iocate
its tabs in the slots of the chassis before
refastening the TB1 mounting screw.
Page 26
(1) Remove the 872A1-87 faceplate by lifting
up at any of its edges.
(2) Remove the four captive housing screws
(Fig. 2) from the chassis.
(3) Use the four housing screws to mount the
870A1U-type upper housing to the chassis
and 870A1-type housing. The three parts should
be held together tightly as the screws are driven.
(4) Place the two tabs located along the lower
edge of the 872B1 faceplate in the notches
ISS 2, SECTION 503-603-102
in the lower side of the 870A1U-type upper
housing.
Speakerphone
For maintenance information on the 3B or
4A speakerphone systems, refer to Section
512-620-100 or 512-700-100, respectively.
For
speakerphone connections, use applicable Tables B
through E.
6.12
(5) Lower the faceplate to rest on the memory.
The spring clip located at the top center of
the upper housing should retain the faceplate.
Page 27
SECTION 503-603- 102
TABLE J
MOUNTING CORD AND 508 PLUG CONNECTIONS
AMPHENOL
PLUG
INSIDE TELEPHONE SET
MTG CD TERMINATIONS
DESIG
PIN
NO.
COLOR
SPADE TIP
COND. IN
MTG . CD
SPADE TIP CONDUCTORS FROM
508 PLUGS.
508 PLUGS
COLOR
PIN NO.
PLUG
COLOR
PLUG PIN
NO.
COLOR
TERM.
•
•
R(1)
1
BL·W
BL
6
BL
6
BL-W
T(1)
26
W-BL
BL
3
BL
3
W-BL
BL
2
w
BL
1
W·O
0
2
R
TB1-2
A1
2
0 -W
A(1)
27
W-0
BL
1
L(1)
3
G-W
BL
L
28
LG
LG(1)
TB1-12
W-G
BL
R(2)
4
BR·W
0
6
T(2)
29
W-BR
0
3
1
•
B(2)
5
S·W
A(2)
30
W-S
0
6
BL-R
0
L
31
R·BL
0
LG
L(2)
LG(2)
R(3)
7
0-R
G
6
T(3)
3!!
R-0
G
3
B( 3)
8
G-R
A(3)
33
R·G
L(3)
9
•
TB1-7
BR-R
G
L
LG
LG(3)
34
R· BR
G
R( 4)
10
S-R
BR
6
T(4)
35
R-S
BR
3
B(4)
11
BL-BK
A(4)
36
BK-BL
L(4)
12
0-BK
BR
L
LG
•
TB1·9
LG(4)
37
BK-0
BR
R(5)
13
G-BK
T(5)
38
BK-G
s
s
B( 5)
14
BR·BK
A(5)
39
BK-BR
L(5)
15
S-BK
LG(5)
40
BK·S
BZ1
16§
BL-Y
TB 2·11
BZ
41§
Y-BL
TB2·5
*Insul ate and store.
Page 28
•
G
2
BK
TB1·2
G
1
S-W
T B1·7
BR
2
y
TB1·2
BR
1
BR
T B1 ·9
s
s
2
v
TB1·2
1
s
TB1-4
6
3
•
TB1-4
s
s
TB1·3
L
LG
ISS 2, SECTION 503-603- 102
TABLE J (CONTI
MOUNTING CORD AND 508 PLUG CONNECTIONS
AMPHENOL
PLUG
INSIDE TELEPHONE SET
SPADE TIP CONDUCTORS FROM
508 PLUGS.
MTG CD TERMINATIONS
DESIG
PIN
NO.
COLOR
Spare
17
0-Y
Spare
42
Y-0
HL
18
G·Y
SPADE TIP
COND IN .
MTG.CD
PIN NO.
PLUG
COLOR
PLUG PIN
NO.
COLOR
TERM.
s
s
4
G
TB1·8
5
R
PSB·9
•
PSB·26
HLG
43
Y·G
PSB-27
19
BR-Y
TB1-5
BL
44
Y-BR
TB1-6
R or R1 20
S·Y
TB1-13
B or 81 45
Y·S
Net. K
BL·V
PSB-24
PSB-25
21§
COLOR
•
SG
AC1t
508 PLUGS
AC2t
46§
V-BL
SPO~
22§
O·V
•
Spare
47
V-0
Net. T
RI+
23
G·V
•
Tl~
48
V-G
•
P4-1Rt
24
BR-V
P3-1Tt
49
V-BR
LK ~
25
S-V
AG~
50
V·S
•
•
•
•
Tip
Ring
Pink
HL
BR·W
PSB-26
Pink
HLG
W-BR
PSB·27
Pink
3
BL
Pink
2
G
TB1·1
Pink
1
Y·BL
TB1·3
•
·-
*Insulate and store.
t95Bl Power Unit
for speakerphone options. Refer to Tables B through E.
~Designations
§ Non-standard
pin numbers.
Page 29
SECTION 503-603-1 02
TABLE K
TABLE L
TO CONVERT THE 872A1M TELEPHONE SET
FROM 1A1, 1A2, TO 1A OPERATION (See Notel
CONNECTIONS FOR D-180818 KIT OF PARTS
LEAD
DESIG
SHb
HOLD
COLOR
y
Y-BL
FROM
(1A1,1A2)
TBl-12
TB1-5
TBl-3
TB1-16
TB1-3
DESIG.
COLOR
(NOTE 1)
RECORD
DISABLE
ONLY
RECORD DISABLE AND
DIAL INTERMIX
(NOTE 2)
woe
BK t
*
1
R
2
2
Net. L2
RCRD
BK
3
3
Net. L2
*Insulate and store.
tSingle pin connector.
BL
HOLD
G
TB1-1
RING
R
PSB-9
BR
TB1-1
TB1-6
R-BL
TB1-1
TB1-6
Net. F:j:
TERMINAL POSTS FOR SWITCH
LEAD CONNECTORS
VDD
HOLD
*(Pink
508 Plug)
SHct
D-KIT
SWITCH LEADS
TO
(1A)
Notes:
1. These are connectors attached to the switch leads.
A single pin connector with a (BK) lead and a
double pin connector with a (R) and a (BK) lead.
2. When this option is provided. the LAST NUMBER
DIALED (LND) feature is disabled and the 32nd
memory may be used just as any other memory.
*Insulated and stored.
tOnly required when busy-lamp option is provided.
:j:Only required when both busy-lamp and speakerphone
options are provided.
Note: Tables B through E provides speakerphone connections for 1A1 and 1A2 KTS. The same tables
apply for 1A KTS
TABLE M
CONVERSION OF KEYS FOR SIGNALING
SELECTIVE SIGNALING
508 PLUG
Key
Functionst
COLOR:
BLUE
ORANGE
GREEN
BROWN
PIN NO:
2
2
2
2
2
1
LEAD COLOR:
w
R
BK
y
v
s
HPPPPP
TB1-3
TB1-2
TB1-2
TB1-2
TB1-2
TB1-4
HPPPPS
TB1-3
TB1-2
TB1-2
TB1-2
TB1-5
TB1-4
HPPPSS
TB1-3
TB1-2
TBl-2
TB1-5
TB1-5
TB1-4
HPPSSS
TB1-3
TB1-2
TB1-5
TB1-5
TB1-5
TB1-4
SLATE
COMMON SIGNALING (SEE NOTEI
508 PLUG
Key
Functionst
COLOR:
BLUE
ORANGE
GREEN
BROWN
PIN NO:
2
2
2
2
2
1
LEAD COLOR:
w
R
BK
y
v
s
HPPP*P*S
TB1-3
TB1-3
TB1-2
TB1-2
TB1-2
TB1-3
HPP*P*P*S
TB1-3
TB1-2
TB1-2
TB1-2
TB1-2
TB1-3
SLATE
Note; Remove (BK) strap between TBl-2 and TB1-3.
*These arrangements use line switch controlled ground for common signal key, used with private or intercommuni·
eating lines. Common signals should be used to operate a common signal relay. Do not wire directly to a buzzer.
tRemove pins to make key nonlocking when used for signaling.
Page 30
ISS 2, SECTION 503-603-1 02
POWER SUPPLY BOARD
PARTS
PSB (SEE NOTE l
MEMORY
I
I
FIG. B
FIG. A
0-180818
KIT OF
PI
Jl
~
~
2
or.r
0
0
0
"
"'
>
SPR
OT
~
~
~
~
COM
SH
~
"'
3
~
I R-G l
zc(_f--<~~~:~--~~G~-2R~I------------------~I~NP~U~T~
-\_I--<
3 5?-1--<
4
~
10
V00-2
e(::b-<
8
~~~--~~-------------+--------'~·~K-~G~
,.£ r-<
~
13>------
~
~
I
PB
BR-R
'0
,':;VII FIG . K
II[._ r-<~
f-< @
so
t
13
FIG
L
FIG . G
OT
STRAP (BK)
I21, .,_-- 1--<
VGL
CR
IYI
RING
10-YI
, f7!...._
IOP'
~
FIG J
10-BKI
t 0R-YII 11 FIG . I
18
10 0-++---:::--_!.!~_:--~1-..!Lo!R~S,::-2~
PB
I
@
~ r-<~@~z~-+IG~-~R~I~--1---~~~-~~N~P~U~T
9
VDD-2
~ I
~ I
IBLl
IBL)
FIG. I<
: 0-r----<..-~(Yl:L___!!!IB~R-:::,V!.-11
VOD-2
~
~
7
RESET
>--==.:._-l
I
* __..:,IB::;K'---'0"-l~
IV-G)
OT
II}--_::.::::.:_::___
VD0-2
\!..1
•"'
(Y).~.___I'-'.V_,-Be::R'-11
COM
V00-1
1/00 - 1
( G-BK)
IYI
OTT
OTT
--'~"'y'-t--'1:::,S-...:V..!.I-1: Fl G. K
Fl G.
H
FIG.
1--<~~~t-~I~B~L~-R~I---t----~L~K~
0
ry:;:z-,
1--< ~~~~-...:I..!.Y~-~G~I---1-------f--~L~K~
SHi
(!)
I G-WI
OOP'
rl--<
14 ~A~r--~==~----~~o~-~·~~~
15~f--<•GGJD=v=tz~-T,ts~lw.~--+-------f---f--J-~SI~
IG-WI I FIG I
d--f--<
16
BATTERY
8- IY I
P2
J2
8-
IBKI
I SKI
(SKI
8+ I Rl
® WITHOUT
® WITHOUT
&+
"~
IWI
~.~c~~
AND ®OPTIONS
~
-STRAP IBKl
®
IWI
I"'
\_ 1--< _,@"'--1-+j-'I.:..,Y-_,O:,ci_ _ _ _ _~-----"D~R
(Wl
<E!::D WITHOUT ONE-TOUCH CALLING
* INSULATE AND STORE
FIG E
I FIG
LRS-1
L
l
2
zo~f---<·(~Y~t~~~~IS~l------~------f--~s~
WITH DIAL lONE DETECTOR
SET FACTORY WIRED FOR
(BR-Wl
r-<~~(~~--~~~·~-O~I____________________v~D~D
\._ 1--<
19
SPEAKERPHONE
NOTE :
__...:,I~W-_,G~l~~~---------'V~O~D
4--,_._---,
DIAL TONE DETECTOR
(!),@, a~ WITH ONE-TOUCH CALLING
FIG C
18 ~1--<'Gv~·=~~t-'I~Y-~B~LLI_ _ _ _ _ _ _ _ _ _~SP~R~
IRI
(!) WITH SPEAKERPHONE
(!}
SHo
IR-BLII
* _ _!.i~BK~-:_o:B:=L.!.I-1
d.
IY I
IBKI
(!)
3 :H A
RELAY
2I
\_1--<~@~z~+-~IB~K,::-0~1~---------~CO~M~
GQ--1--<•{ill)"'="+~Z'--._..I-"O.::.-V'-'I'-1 F1 G. K
\_ 1--<
(@
IG-YI
SPO
220-f--<~
-~®~1-~to~-~"1~----------------~P~L~
1--<~
23 ~---<--'@~z:___7,IB~L~-~Y~I----------~DT~T~
M0-+------~~~~~~~~~:~
250-~+------t'-'G"'-"'v"l'I FIG . K
(BR-WI
26A
27A~~----------~'v~~~~~ IW-BRI
28::;:
(W-BRl
FIG. I
HL
HLGIFIG L
"l
Fig. 8-872A 1M Telephone Set, Connections (Sheet 1 of 4)
Page 31
SECTION 503-603-1 02
FIG. D
FIG. C
DIAL TONE DETECTOR
t D-180493)
RELAY PRINTED
WIRING BOARD
( D-180568)
( R-BL)
SHO
I
LK
( BL-Rl
SHI
(G-W)
VDD
(W-G)
INPUT
(G - R)
PB
(0- BKl
INPUT
( G-R)
I
7
2
2
FIG . B
LK
(Y -G )
DT
(0 - Y)
VDD
( R-0 )
DR
(Y - 0)
PL
(O- R)
OTT
(BL- Y)
SPR
( Y-BL)
COM
(BK-0)
SPO
tG-Yl
3
4
12
5
10
FIG. B
6
FIG. E
ONE-TOUCH
CALLING SWITCH
(0-180493)
Sl
(Sl
S2
(Sl
9
4
3
8
II
I
FIG . 8
2
FIG. F
SWITCH HOOK
(Sl
FIG. G
f--!c_----"-(Y'-'lc__ _ _ _ __,b'-J FIG. I
DIAL
( BR)
( BL)
d
(Gl
d
*·
(W)
e
(R)
f
(BL)
f
IY)
g
+g
IBKl
h
(BL)
h
( BLl
i
*'
*k
j
(0)
10)
(Y)
( W)
FIG . H
( W)
j
k
DP ON -
DIAL PULSE
OFF NORMAL
Fig. 8-872A 1M Telephone Set, Connections (Sheet 2 of 4)
Page 32
FIG . 8
ISS 2, SECTION S03-603-1 02
FIG. J
.
I 10-BKI
FIG. H
FIG. I
TB2
.---
TBI
c---
IGI
I
IWI
FIG
2
IGI
d
IBKI
~ FIG.
G:D
4
~
I BLI
67?>
Ll
\
I BLI
IRI
IWI
J
~,
..
I SKI
~
(Y-Bll
FIG
L
2
~
I
{BKJ
I~
IBL I
'U.XJ
'
I FIG
BUZZER
!BK-BLI
FIG. K I IY·BLI
I
K$~2041 9,
IR-BLi o
lVI
IYI
3
FIG F
I
(SRI
c
F
4
I Sl
(BK-BRI
lO-RI
h
FIG. B
(BR-Wl
5
I BLI
0
Gl5
77?>
~
(Y-Bll
J5
I
I
(BK)
9
FIG J
~
IRI
f
(Y-Bl)
~
FIG. K I IBL-YI
~
IBR-Y)
ll-_
FI G. J
I
(BR-A)
•
( BK)
-
~
tWit
t
:~
I
I
I
I
tWit
(W-BR)
9
IBRI
IBK- BLI
~
CRI
4 76F
~
IG I
FI G. F
jo
I Sl
II
I.
I YI
12
IG-W)
FIG
~
J
NETWORK (NOTE I OR 21
-
~
TtPIGI
PIS RINGfR
FIG.
IR-GI
~
I
I
I
'
FIG
K
~ f-
IS-WI
IRII_~
IGI
(Y-BR)
6
P5 (BKI
'
IBR-Y)
~
HAN DSET
(BK)
13
IRI
14
<a_to
L2
B
10- Wl
IS-Yl
IBL-W)
FIG. J
15
G:D
0:0
G
G:D
FIG. H
I IBK )
I
Ll
0
,'!,.
(Y-S)
h..
tv-ol
16
(0-Y )
'----
NOT ES:
FIG I
(R- Bll
!...
( BL- W )
A
425K NETWORK
0 :~
2. PHYSICAL TERMIN AL LAYOUT OF
4228-TYPE NETWORK
T
F
0
0
~
I
10- BKI
IR-GI
~
.~
;..•r:l
(Y-Bll
.3....
0 K
§R
G
IBK-GI
QJRR
a§
FIG 8
(!)
*
IB R-YI
(V- Bll
/ZJ
Ll
ffi)
~
£h.
F IG. H
I. PHYSICAL TERM INAL LAYOUT OF
FIG. K
{Jl ffi)
GN
ffi) L2
WITH SPEAKERPHONE
INSUL AT E AND STORE
t IF NONM ODULAR AMPLIFYING HANDSE T
IG- BKI
IS USED , YE LLOW LEAD MUST BE
CONNECTED TO TERMINAL 10 .
......... STRAP
L____
Fig. 8 - 872A1M Telephone Set, Connections (Sheet 3 of 4)
Page 33
SECTION 503-603- 102
FIG. K
FIG. L
635-TYPE KEY
MTG CORD
50
25
49
24
48
23
18
43
5
14
22
47
E AG
E LK
E P3
E P4
E Tl
E Rl
HL
*•
*
*
*
*
(G-YI
(Y-G)
L RS- 1
LRS-2
(W)
(8RI
HL
HLG
(9R-WI
(W-9RI
E ~=~RE
!V-Ol
IW-G)
lA, IH
(W-0)
(G-WI
"
29
17
42
~
Tl
(W-BL)
:!'
IBL-Yl
(Y-Bll
Rl
IBL-WI
I
*~
* (W-0)
FIG H
*
2
3
~
L
(W-GI
(W-0)
LG
I
2
{W-BU
3
4
5
6
I
IBL-W)
(BL-Wl
-
IBL-Rl
(R BL)
(BL-RJ
(R-BLI
2A ZH
(W 51
(W-5)
(W-9RI
LG
I
2
3
IBR- Wl
5
6
(RI
(W-9RI
(0-YI
T2
SPARE
E SPARE
E R2
(Y-O)
IBR-W)
4
*
*
FIG B
-
FIG I
L3
IBR-RJ
IBR-RI
LG3
3A, 3H
IR-BRI
( R -9 RI
n
(R-01
(R:.§l_
--
32
21 ~~WR
AC PWR
46
R3
7
~
~ =G
HOLD
7>-
~-
)):_
h
(---- h '
I
>-- L..t
ORAN~E
L2
LG2
FIG J
,.
,
LG
!WI
FIG B
30
~
L
'---
IG- Wl
Ll
LGI
t
(9LI
*
LOGIC
RESET
SWITCH
(Y- 9 LI
(G)
*
*
(BR -BK I M(0-V)
*
95
28
27
16
41
(5-V)
(V-BRl
IBR-V)
(V·G)
(G-VI
508
PLUGS
~
E 92
(5-W)
E 93
(G-RI
(BL-BK)
E 94
3
26
IV-SI
GREEN
L
LG
(5-W)
(9KI
I
2
3
4
( R-0)
IBL-V)
(V-BL)
5
6
(0-RI
(0-RI
~
">-
_;e)
~~
)--
-:_t
2
I
>-- _ j
>--
~~
/
~ =::::!..3
>- ~·
>-- ......:.J
BROWN
12
37
36
35
20
45
10
L4
LG4
(0-9KI
(0-BK)
(81<-0l
tBK-0)
IBRl
IBK-BL)
4A 4H
L
LG
I
(Y)
T4
Rl
91
R4
IR-S)
(R-Sl
2
3
4
5-R
6
(5-Y
FIG I
IY-SI
39
2
38
19
44
"
LS
E LG5
5A 5H
AI 9
T5
SG
9L
R5
IS- BKl
15-BK)
!BK-Sl
ORS
~
L
(9K-S I
LG
I
2
3
4
5
6
(5)
IBK-BR
10-W)
!VI
IBR-Y)
TIP
(BK-G)
( BK-G I
IY-BRI
RI NG
!GI
(R)
IG-BK)
(G-9KI
~
*-INSULATE AND STORE
Fig . 8-872A 1M Telephone Set, Connections (Sheet 4 of 4)
Page 34
~~
~ ~~ -:t I
4
5
(5 Rl
'--15
40
>--
>-- __j
.,_
):_
~~
h
'
--<>--'--!y
~h
~>-- ~
5
ISS 2, SECTION 503-603-1 02
PSB-16
(G-W)
f NETWORK
TBI-11
(S)
(R•Bl)
MTG. CORD
--(Z
AI (O-Wl
TBI•IZ
(BR)
(Y)
LS
TBI•I
~
STRAP
-<H
BL( Y-BRI
TBI·6
*
INSULATE AND STORE
@)FOR ADO-ON CONFERENCING, CONVERT THE 5TH
PU TO NONLOCKING (REMOVE PIN)
@FOR MULTILINE EXCLUSION, CONVERT THE 'TH
PU TO NONLOCKING (REMOVE PIN)
G)
WITHOUT STATION BUSY LAMP
(!)
WITH STATION BUSY LAMP
@
"I" HOLD OPTION
®
CRI
476F
TBI·IO
-<"k"'
-<
lA (W·O)
*__j
<W
(BLI
HOLD
1ST
I
PU 2
(;)
(Y·Bl)
(W)
27
TBI·3
2ND
-<
-<
-<
30
I
ZA (w-s)
PU 2
(R)
STRAP
(U)
3RD
33
3A (R•G)
TBI·7
(S•W)
I
PU 2
(BK)
TBI·Z
4TH
4A(BK•Bl)
TBI•9
(BR)
I
PU 2
36
(Y)
~TH
-<
SA (BK·BR)
39
TBI•4
(S)
I
PU 2
(Y)
<.W
Fig. 9- "I" Hold, Exclusion, Station Busy Lamp, and Add-On Conference-! A 1 and 1A2 KTS (Showing 5th
Key Modified)
Page 35
-
SECTION 503-603-1 02
TELEPHONE SET
(TOUCH•A•MATIC)
(6-BUTTON LINE KEY)
MOUNTIM~
CORD
1498 AOAPTER
INSIDE \liRE
DIOR CORD,
Ill, OR CABLE
A25B CABLE
117 VAC
TO KEY TELEI'HONE SYSTEM (SEE NOTE l
NOTE' DISCONNECT Tl£ (V-l!L) IN THE CABLE AT KEY SYSTEM ENO
Fig. 10-Biock Diagram-872A 1M Telephone Set Using 38 Speakerphone
Page 36
ISS 2, SECTION S03-603- 102
TOUCH-A-MAT I C
TELEPHONE SET
6-BUTTON L1 NE KEY
~OUNTI
NG
CORO
POWER
CUT - OFF
MODE
82B CONNECT I NG
BLOCK
085-87
CORO
A25B CABLE
' - - - - TO KEY TELEPHONE SYSTE~
!NOTE 2 )
NOTES:
1. STRAP NECESSARY Ot4. Y IF SET IS AlSO
EQUI PPED WI TH DIAl TONE DETECTOR TO
PROV I DE ONE-TOUCH CAl LI NG OPT ION.
2 . IF POWER I S PROV I DED THROUGH KEY CABlE,
USE (BR-V) PAIR FOR 65-TYPE POWER UNIT
ANO STRAP 24 TO AC1 ANO 49 TO AC2 ON
828 CO NNECT IN G BlOCl<.
Fig. 11-Biock Diagram-872A 1M Telephone Set Using 4A Speakerphone
Page 37
SECTION 503-603-1 02
@
(BR)
FW2
*
IGI
J~
I
IGI
IBK-G)
I
I LS
I
~IAL
ONl
;
I
I
L_
..!.J
RCVR
IWI
rl
!,.
,- -.,
IBKI
MB7 2
,!,..
IG·BK)
I
I
I
I
IBL·RI
I
42~·
OR
4228-TYPE
(Y)I
(R)
IWI
@
"f~GN
@
@
(BR-V) RR
~24
>--0--11-:::<
FW3
POWE-;~
PSB
TB2
13
IBR·R)
POWER SUPPLY
PSB
13
@
IG-BKI
I
NETWORI<
s
IV-BLI
I
10
TB2
I
rJ@
I BKI
STRAP
@
IBL-YI
®
I
I
IR-01
FW4
., I
'V·BR)
IR - BRI
I
I
IRI
IBKI
>I
LEGEND .
'--+@
IBKI
T82
12
@
@
IBR-YI
0
WITHOUT 4·WIRE OPTION
WITH 4-WIRE OPTION
*
INSULATE AND STORE
IY - BLI
0~------~~~----------~0
a
8
TB2
4 - WIRE CONTROL
N~T.
lVI
@
lSI
--<47~~
MTG CORD (V·OI
(S)
--<
AllO - W)
TBI
II
NET.
F
FW
* IBLI
(R-BLI
(SRI
TBI
(G)
2~----~o-~~~~~----~~--~~--~~~~ HOLD
--< 27
lA (W·OI
TO OTHER
l:
TBI
2
3
2 (BK)
1
"A" LEADS _.1~~·2__,_(Y.:_I,_...c+--*-e-2-(:..:V_;_l--'
PU
Fig . 12-872A1M Telephone Set-2/4 Wire Connections
Page 38
1
IY·BLI
2 IWI
(R)
RT
~~49
TBI
2
ISS 2, SECTION 503-603-1 02
PSB-4
OP
(BL)
PSB-5
OPR
TIP (G)
(NOTE)
(BL)
TB1-8
RING~
(NOTE)
PSB-9
T<D
PSB-2
~(!)
NEH1
""
>-0----<f-(---1114.. --7
(!) DIODE
(R-G)
NET RR
(!) - WITH RESTRICTED DIALING
NOTE : REVERSE POLARITY ON TIP AND RING LEADS ON ALL
LINES WITH RESTRICTED OIALING .
Fig. 13-Connections for Restricted Dialing Option
Page 39
.,a
~
PSB-7
MB76
(G) TB:-:8
4A
SPEAKERPHONE
-
orr
.v
~
LK
25
TI
ON
~J
(V-G)
48
K3
~
":J
P3
M873
(G-R)
24
23
(R-BL)
1
PSB-21
22
~
PSB-16
/f
TB2- 12
(R)
(R-G)
(BR-Y)
TB2-I 0
(II)
(V-BL)
AI
(G-Il)
(Y)
D-180568
GIS
tJ
ON 1
LS
g
@L,
M872
4
f
LK
RELAY
3
(Y)
(II-G)
(BR-R~
(G)
(BK)
TB2-8
_n.
(BK-G)
PSe-8
TB2-13
N[T.
B
~
(0-Y)
PSB-9
J>..
(BK)
TB2-2
_n.
~
P\J
LS
(G)
d
(R)
~
(0-W)
AI---< 2
f>
(Y)
a
b
~
(R-BL)
TBI-12
(BR)
f.Ls
c
TBI-1
(G)
(sl
(II)
•
TBI-11
G)
Ill TH SPEAKERPHONE
0
Ill TH Dl AL TONE DETECTOR
@AND@
Ill TH ONE-TOUCH CALLING
2
l A - - - < 27
2l - - - < 30
I
(11-S)
(II)
P\J
(11-0)
2
(R)
T~- 3
I
(Y-BL)
c
(0-BK
TBI-16
50
liNG---<
2GN
(Y-BL)
(~
NET-r
(v-s l
AG
~I
(G-BK)
2
-
R
s
PSB-1
HOLD
-
(BL)
*
*t
Fig. 14-872A 1M Telephone Set, Partial Functional Schematic
INSULATE AND STORE
DIAL PULSING RELAY IN SET
..."'0.
0
~RR
(VIA 82B
CONNECTING
BLOCK)
v
KI
(G-Y)
(o-v)
SPO
PSB-2
u
It
0
(G-V)
Rl
K6
(BL-R)
SPO
(G-R)
PSB-6
K2
K
(Y-G)
(BR-V)
P4
RELAY
"['
0
z
M871
2
PSB-14
DIAL TONE
DO ECTOR
D-1 80493
(BL)
3
PSB-13
(S-V)
---41~'---
I
PSB-5
_n.
tol87~
DPRt
PS~28
(II-BR)
4
DP
IBLI
~
0
....
17
PSB-4
fA
~
PU
"'~
(IDP')
10
CD
TB2-I
0
':"
...,0
TABLE N
TROUBLE ANALYSIS- 872A1M
TROUBLE
NUMBER
1
FAILURE
Dead set on all Jines when
off-hook on handset
ADDITIONAL SYMPTOM
POSSIBLE CAUSE
Line lamp does not come on when Mounting cord improperly
handset is taken off-hook .
inserted at equipment end
REMEDIAL ACTION
Check cord insertion and
connections
Line lamp comes on when
handset is taken off-hook. Set
remains dead when 95B power
unit is disconnected.
Bad connection between
handset and telephone set
Defective receiver
Check handset
Dial tone is not present when
speakerphone is on.
Open tip or ring lead at
635-type line key
Check leads and connections
from contact strips
Unknown
Replace telephone set•
Line lamp comes on when
handset is taken off-hook . Set
becomes active when 95B power
unit is disconnected.
Improperly installed or
defective memory
1. Check connector cable
insertion
1. Check handset cord connections
2. Check handset jack connections
2. Replace memory
Defective PSB
Replace telephone set•
2
Dead set on all Jines only
when speakerphone is on
Set is active when off-hook
on handset.
Improperly connected or
defective speakerphone
1. Check connections
2. See appropriate speakerphone
BSP for trouble analysis
3
Cannot transmit when off-hook
on handset.
Line lamp comes on. Dial tone
present, but sidetone absent.
Handset cord improperly
inserted into either handset or
jack in telephone set
Check handset cord and/or
handset
Defective transmitter
Replace transmitter or handset
Defective 616B jack
Replace 616B jack
Defective network
Replace telephone set•
•Refer to 6.02 (4)
I
il:
-~
g
"'
0
z
Ill
..-:...
Ul
0
w
t~
0
~
..~
6"'0
TABLE N
Ul
TROUBLE ANALYSIS- 872A 1M (Contd)
~
z
o.)
TROUBLE
NUMBER
4
FAILURE
Cannot manually dial when
off-hook on handset (dial
tone is present).
POSSIBLE CAUSE
ADDITIONAL SYMPTOM
REMEDIAL ACTION
Bridged set off-hook
Place bridged set on-hook
Speakerphone improperly
installed or defective
Check appropriate speakerphone
BSP for analysis
No dialing clicks heard when
dial is returning. Condition
remains unchanged when 95B
power unit is disconnected.
Improperly installed or
defective rotary dial
L Check connections
2. Replace rotary dial
Unknown
Replace telephone set*
No dialing clicks heard when
dial is returning. With 95B
power unit disconnected , set
can manually diaL
Improperly installed or
defective memory
L Check connector cable
2. Replace memory
Defective PSB
Replace telephone set*
Improperly installed on
defective speakerphone
L
Dialing clicks heard ( in handset)
when dial is returning.
5
Cannot manually dial when
speakerphone is on. (Dial
tone is present.)
Set does manually dial when
off-hook on handset
6
RECORD lamp does not
function properly
RECORD lamp does not turn
on when RECORD button is
depressed.
Check connections
2. See appropriate speakerphone
BSP for trouble analysis
Defective switchhook
Replace telephone set*
AC power not present
Check for commercial power
Battery not connected
Connect battery
95B
power unit not plugged
in or defective
Check or replace 95B power unit
(should read 13.4 to 18 Vac
across screw terminals 24 and 25
on PSB)
Open in IW
Check IW and connections
Memory, RECORD OFF or
WAIT button stuck down
Clear stuck button
Defective logic reset switch
Replace line key
Switch of D-180818 Kit of
Parts in ON position
Change switch position to
OFF
--
*Refer to 6.02 (4)
"'w
0
0.
0
':"
0
o.)
TABLE N
TROUBLE ANALYSIS - ll72A 1M (Contd)
TROUBLE
NUMBER
FAILURE
ADDITIONAL SYMPTOM
7
POSSIBLE CAUSE
Cannot record properly into the
31 memory positions or into
LAST NUMBER DIALED
REMEDIAL ACTION
memory
1. Check connector cable
2. Replace memory
Improperly installed or defective
6 (cont' d)
Unknown
Replace telephone set*
Lamps turns off when any
memory button is depressed .
Improperly installed or defec-
1. Check connector cable
2. Replace memory
Unknown
Replace telephone set*
Lamp does not turn off as
dial is returning. No relay click
heard at beginning of dial
wind-up or at end of dial
Improperly connected or defective rotary dial (off-normal
contact)
1. Check rotary dial connections
2. Replace telephone set*
return.
Unknown
Replace telephone set •
Lamp does not turn off as
dial is returning, but relay
click is heard at beginning of
dial wind-up and at end of
dial return. Can manually
dial off-hook.
Improperly connected or defective memory
1. Check cable
2. Replace memory
Unknown
Replace telephone set*
Lamp turns off as dial is
returning and stays off.
Can manually dial off-hook.
Memory button was not
depressed prior to the operation
of the dial
Record per 5.01 (4) through (7)
Defective memory
Replace memory
Unknown
Replace telephone set*
Defective memory
Replace memory
Unknown
Replace telephone set*
Record lamp functions
properly and set dials manually
tive memory
position.
*Refer to 6.02 ( 4)
iii
"'
~
"'
Q
i5
z
-:
..
CD
•w
"'8
0.
0
~
...
0
.,
~
TABLE N
.....
D
CD
5
z
TROUBLE ANALYSIS- 872A1M (Contd)
...
TROUBLE
NUMBER
FAILURE
ADDITIONAL SYMPTOM
Party is reached when number
is recorded as it is manually
dialed ~ however, when number
is subsequently dialed from
memory, party is not reached wrong number is dialed from
7 (cont'd)
POSSIBLE CAUSE
REMEDIAL ACTION
Check recording procedure
Record per 5.01 (4) through (7)
Defective memory
Replace memory
Unknown
Replace telephone set •
memory
8
Cannot dial properly from
memory on handset.
*Refer to 6.02 (4)
MB7 relay does not operate
(no click heard) when memory
button is depressed
Battery not connected
Connect battery
Memory not securely mounted
Tighten memory mounting
screws
Improper and/or defective strap
from PSB terminal 18 to PSB
terminal 20
Check and/or replace strap lead.
See Fig. 8B
Improper connection to or
defective memory
1. Check connector cable
2. Replace memory
Unknown
Replace telephone set •
MB7 relay operates (click
heard) when memory button
is depressed but no dialing
clicks are heard. In addition,
transmit and receive levels
are very low.
WAIT button is stuck down
or defective
replace memory
Unknown
Replace telephone set •
No digits, random digits or all
the same digits in memory
location(s). Note : memory
may or may not have functioned
properly at some previous time.
AC power outage for 24 hours
or longer
numbers into memory
Free stuck WAIT button or
Reestablish ac power and record
..."'
0
t
't'
0
~
TABLE N
TROUBLE ANALYSIS- 872A1M (Contd)
TROUBLE
NUMBER
FAILURE
ADDITIONAL SYMPTOM
POSSIBLE CAUSE
Defective battery
8 (cont'd)
REMEDIAL ACTION
1. Allow the battery to be charged
for a minimum of 5 minutes.
Then momentarily remove the
95B power unit from the ac
power outlet and reinsert
2. If previously stored numbers
are not dialed from memory,
replace the battery
3. Repeat procedure
Two or more memory locations
Defective memory
Replace memory
Unknown
Replace telephone set*
Static discharge damage
have same digits which are
usually different from originally
recorded digits
Automatically dials through a
"wait"
9
Cannot dial properly from
memory when on the
handset (wired for dial tone
detector option)
*Refer to 6.02 (4)
MB7 relay does not operate
(no click heard) when
memory button is depressed.
1. Consult Telco Engineer for
proper grounding procedure
2. Replace memory
Memory not securely mounted
Tighten memory mounting
screws
Improper connection to PSB
terminal 23
Check connection to and/or
replace strap to PSB terminal
23
Defective memory
Replace memory
Unknown
Replace telephone set*
Battery not connected
Connect battery
Precise TOUCH-TONE dial
tone may not be present
Make sure precise ( 350 Hz and
440 Hz) dial tone is present
Memory not securely mounted
Tighten memory mountlng screws
;;;
Improper installation of dial
tone detector D- 180493
Check connections for D-180493
"'
installation
- - - -- - -·· -
-~
--
"'
~
...
5
z
Ul
...
...
D
CD
Ul
...
0.
0
0
~
0
~
....a
Ill
TABLE N
co
!:!
ct
...
~
TROUBLE ANALYSIS- 872A 1M (Contd)
o-
....
TROUBLE
NUMBER
FAILURE
ADDITIONAL SYMPTOM
Same as above Addition of strap lead between
PSB terminals 20 and 23 does
not correct problem
9 (cont'd)
Addition of strap lead between
PSB terminals 20 and 23
corrects problem.
Automatically dials through a
"wait.,
10
Cannot turn speakerphone on
when ON button is depressed
(wired for speakerphone option).
*Refer to 6.02 (4)
POSSIBLE CAUSE
Improper connection to or
defective memory
8
REMEDIAL ACTION
.~
1. Check connector cable
2. Replace memory
0
Defective memory
Replace memory
Defective dial tone detector
Replace D-180594 dial tone
detector
Unknown
Replace telephone set*
Memory not securely mounted
Tighten memory mounting
screws
Improper connection to PSB
terminals 23 and 11
Check installation of D-180493
Kit of Parts
Speakerphone indicator lamp
does not turn on , but line
lamp is on.
Handset off-hook
Place handset on-hook
No dial tone heard, but indicator
lamp turns on.
Line button not depressed
Depress line button
With temporary strap lead
added between PSB screw terminals 16 and 13, speakerphone
turns on when ON button is
depressed.
Improper connections or
defective D-180568 Kit of
Parts
Check connections to and /or
replace D-180568 Kit of Parts
With temporary strap lead
added between screw terminals
11 and 12 on TB1, speakerphone
turns on when ON button is
depressed.
Defective switchhook a-b contacts 1. Check (G-W) harness lead
or connecting lead to power
between screw terminal 11 on
supply PSB
TB1 and PSB terminal 16
2. Replace telephone set*
Speakerphone indicator lamp
does not turn on and neither
does line lamp
Improper connections or
defective 85B1 power unit
1. Check for commercial power
2. Check connections per Tables
B, C, D, and E
I
TABLE N
TROUBLE ANALYSIS- 872A1M (Contdl
TROUBLE
NUMBER
AODITIONAL SYMPTOM
FAILURE
POSSIBLE CAUSE
Defective speakerphone
See appropriate speakerphone 8SP
for trouble analysis
With temporary strap lead added
between PSB screw terminals 14
and 17 , speakerphone turns on
when ON button is depressed and
RECORD lamp goes off
LK relay circuit defective on
D-180568 Kit of Parts
Replace D-180568 Kit of Parts
Operation of RECORD OFF
button or line key buttons turns
RECORD lamp off.
Defective switchhook h-i or
j-k contacts
Replace telephone set •
Cannot turn speakerphone
off when handset is lifted
off-hook (wired for speakerphone option).
Speakerphone turns off when
OFF button is depressed but
turns back on when OFF
button is released
Short circuit between screw
terminals 11 and 12 on TB1
Clear short
Defective switchhook a-b
contacts
Replace telephone set •
13
Cannot hear dial clicks when
dialing with speakerphone on
(wired for speakerphone
option).
With the speakerphone ON
button depressed , dialing clicks
can be heard.
Physical spacing between
speakerphone, loudspeaker and
transmitter units is too close
See appropriate speakerphone
BSP for proper placement of
units
14
Speakerhone does not turn on
when a memory button is
momentarily depressed in the
automatic dialing mode (wired
for one-touch option).
M87 relay does not operate
(no click heard) when memory
button is depressed
Battery not connected
Connect battery
With 4A speakerphone, strap
not added on 82B block
Add strap from terminal 10 to
35 in 828 block
One-touch calling switch
turned off or defective
1. Turn one-touch calling switch
on
2. Replace one-touch calling
switch assembly of D-180493
Kit of Parts
11
12
RECORD lamp does not
turn off when speakerphone
ON button is depressed
(wired for speakerphone
option).
·--·
.,
....
Q
CQ
~
REMEDIAL ACTION
3. Check that 8581 power unit
is plugged into commercial ac
power outlet
4. Check or replace 8581 power
unit (should read 18 to 25 Vac
across "open circuited"
secondary screw terminals)
10 (contd )
*Refer to 6.02 (4)
-
-- - - ----------
With temporary strap between
PSB screw terminals 16 and 20
speakerphone turns on when a
memory button is depressed
- - - - ~--
I
'
in
"'
~
"'....p;
0
z
..."'0.
0
0
~
0
o.)
..,
...,..
"'....~
TABLE N
D
CD
...
0
z
TROUBLE ANALYSIS- 872A1M (Contd)
TROUBLE
NUMBER
!
FAILURE
ADDITIONAL SYMPTOM
14 (cont'd)
With temporary strap between
PSB screw terminals 13 and 21 ,
POSSIBLE CAUSE
REMEDIAL ACTION
Defective dial tone detector
D-180493 Kit of Parts
Replace dial tone detector PWB
assembly of D-180493 Kit of
Parts
Defective connections between
dial tone detector and PSB.
Check (Y·G) and (G-Y) leads to
PSB terminals 13 and 21,
speakerphone turns on.
15
Speakerphone turns on but set
does not automatically dial
when memory button is
depressed (Wired for one-touch
option).
16
Delay time between depression
of a memory button and
initiation of automatic dialing
exceeds 3 seconds (wired for
one-touch option).
17
Cannot turn speakerphone
off (wired for one-touch
option).
respectively
Defective dial tone detector
D-180493 Kit of Parts
Replace dial tone detector PWB
assembly of D-180493 Kit of
Parts
(BK) strap leads to screw
termi nals 11 and 23 on PSB
were not insulated and stored
Insulate and store strap leads.
when option was wired
Set automatically dials when
screw terminals 20 and 23 on
PSB are temporarily shorted.
Normal conversational level
on speakerphone.
Precise TOUCH-TONE dial tone
not present or a defective dial
tone detector
1. Check CO line for presence of
precise TOUCH-TONE dial
tone (350 Hz and 440 Hz)
2. If correct dial tone is present,
replace dial tone detector PWB
assembly of D-180493 Kit of
Parts
Defective timing circuit
1. Replace memory
2. Replace dial tone detector PWB
assembly of D-180493 Kit of
Parts
Defective muting circuit
Replace telephone set*
-
*Refer to 6.02 ( 4)
"'0
....
0.
0
':"
0
0,)
TABLE N
TROUBLE ANALYSIS- 872A 1M (Contd)
TROUBLE
NUMBER
FAILURE
17 (contd)
ADDITIONAL SYMPTOM
POSSIBLE CAUSE
REMEDIAL ACTION
Speakerphone turns off when
OFF button is depressed but
turns on when OFF button is
released.
(BK) strap to screw terminal 18
on PSB was not insulated and
stored when option was wired
Insulate and store strap lead
Speakerphone turns off and
stays off when (Y·BL) lead is
disconnected from terminal
27 on PSB and OFF button
is depressed .
Defective output logic level
Replace memory
Speakerphone turns off when
handset is taken off·hook but
turns on when handset is
placed on-hook.
Defective circuit of D·180493
Kit of Parts
Replace dial tone detector PWB
assembly of D·180493 Kit of
Parts
18
Set dials automatically but
does not wait for dial tone
(wired for one-touch calling)
Noise on line
1. Add . 05 mf capacitor between
PSB·17 and PSB-23
2. Remove above capacitor and
add resistor (10 Kl2 to 50 Kn 1
in series with ( G- R) dial tone
detector input lead.
19
Automatic dialing commences
Static discharKe damage
1. Consult Telco Engineer for
for no apparent reason (wired
for one-touch calling)
L _ _ _ _ __
---
-~
-
proper grounding procedure
2. Replace memory
------
iii
"'
-~
m
"'
n
...
5
z
"'-o" ....
Q
.,.a
Q
<a
"'
.."' "'-o"
"'0c.>
0.
0
':"
...
0