AT&T 872A1M TOUCH-A-MATIC telephone set, 3B, 4A speakerphone, D-180568, D-180493, D-180494,, D-180818, kit of parts Instruction manual

Below you will find brief information for telephone set 872A1M TOUCH-A-MATIC, kit of parts D-180568, kit of parts D-180493, kit of parts D-180494, speakerphone 3B, speakerphone 4A.

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BELL SYSTEM PRACTICES

AT & TCo Standard

SECTION 503-603-102

Issue 2, April 1978

872A 1M TELEPHONE SET

(TOUCH-A-MA TIC ® SET)

1. GENERAL

CONTENTS PAGE

2 . IDENTIFICATION

Design Features

Optional Features

Ordering Guide

Operating Features

3 . INSTALLATION

STANDARD INSTALLATION

Installat i on Check Procedure

OPTIONAL APPARATUS INSTALLATION

D-180568 Kit of Parts (With

Speakerphone)

D-180493 Kit of Parts (Dial Tone

Detector and One-Touch Calling Switch)

D-180494 Kit of Parts (2 / 4-Wire

Service) 12

D-180818 Kit of Parts (Record Disable and Dial Intermix Features) 12

Single-L i n e Service

Head Telephone Set

COMPONENT LOCATION AND ACCESS

INFORMATION 17

Location of Components 17

CONTENTS

Mounting Cord

PAGE

Network Terminals

Power Supply Board (PSB) Terminals

Line Key Removal

Faceplate Removal

Handset Cradle Removal

Housing Removal

4. CONNECTIONS

5 . OPERATION

Record A Number Into Memory

Change A Number In Memory

Delete A Number From Memory 22

Automatically Dial A Number From

Memory 22

LAST NUMBER DIALED Feature 24

6. MAINTENANCE

Trouble Analysis

Battery

Memory

Dial

6-Button Line Key

NOTICE

Not fo r use or disclosure o u ts id e t h e

Be ll Syste m except u nd e r wr i tte n agreement

P r i n te d i n U.S

A . Page 1

SECTION 503-603-102

CONTENTS

Ringer

Buner

Handset Jack

Handset

Faceplate

Speakerphone

PAGE

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)

• Walnut Woodgrain (-109)

• Matte Aluminum (-122)

1. GENERAL

1.01

This section contains identification, installation, connections, operation, and maintenance information on the 872A1M TOUCH-A-MATIC ® telephone set (Fig . 1).

1.02

This section is reissued to:

• Add D-180818 Kit of Parts (Record Disable and Dial Intermix Feature)

• Show 872Al-87 faceplate MD

• Add 872Bl faceplate and 870Al U upper housing

• Revise Fig. 1 through 6, 8 through 12, and

• Add Fig. 7 and 13

• Revise Tables A through F, J, K, M, and

• Add Tables G, H, I, and L.

Since this reissue covers a

general

revision, arrows ordinarily used to indicate changes have been omitted.

1 .

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.

2. IDENTIFICATION

2.01

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.

2.02

Design Features:

• Modular key telephone set

• Integrated circuit memory

• Common audible ringing

• Buzzer

• Busy lamp diode

• Line pickup buttons convertible to nonlocking signal buttons

• Memory buttons from which to select preprogrammed telephone numbers for automatic dialing

• Capability to record and automatically dial

31 telephone numbers of up to 15 digits each

Page 2

ISS 2, SECTION S03-603-1 02

2.03

• • Plug-in battery

• Capability to pause for subsequent dial tones during automatic dialing (WAIT input).

• Last number

Fig. 1-872A1M Telephone Set

manually dialed memory

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

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.

• Station Busy Lamp

• 2/4-Wire Service

•

Add-On-Conference

• Exclusion (multiline)

• Bridged Ringing

• "I" Hold

• Signaling

• Restricted Dialing

• Amplifying Handset

• Head telephone set operation

• End-to-end signaling using 1035C3A (MD) or 1035AF3A Dial Adjunct (Section 501-164-130).

2.04

All options are implemented by:

• Wiring changes in the telephone set

• Installation of appropriate additional items.

2.05

Ordering Guide:

(a) The 872A1M telephone set is a modular type telephone set and may be ordered complete and ready to install as.

• Set, Telephone, 872A1M-*.

(b)

Ordered Separately:

• 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

• Housing, 870A1-*

• Housing, Upper, 870A1U-* (used with 872B1 faceplate)

• Faceplate, 872A1-87 (MD)

• Faceplate, 872B1-122 (matte aluminum)

• Handset, G 15A-*

• Cord, Handset, H4DU-*

• Base, Telephone Set, 872AM (includes the following):

Dial, 8EA-119

Key, 635BT5

812365039 (P-23F503) Collar

Ringer, P1B

Network, 425K or 4228-type

Buzzer, KS-20419L1

Cord, Mounting, D50BB-87

Battery, KS-20390L4 or KS-20390L2

Jack, Handset, 616B

Memory, 870B (includes button field)

841382617 Power Supply Printed Wiring

Board (PSB) Assembly

840393672 Directory Sheet Set

Booklet, Instruction, Subscriber, SIB-2455B

(d)

Optional Apparatus (order

required):

• 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- 1 02

TABLE A

OPTIONS

OPTION

Speakerphone•

One-Touch Calling

ADDITIONAL ITEMS REQUIRED

108-Type Loudspeaker

680-Type Transmitter

828 Connecting Block

85B1 Power Unit

D 180568 Kit of Parts

760A Loudspeaker

666B Transmitter

55-Type Control Unit

2012B Transformer

149B Adapter

D-180568 Kit of Parts

D-180493 Kit of Parts

Speakerphone

D 180493 Kit of Parts Dial Tone Detector

Station Busy Lamp

"!"Hold

Signaling

Exclusion (Multiline)

Add-On-Conference

Bridged Ringing

2/4 Wire Service•

1 A Key Service

Amplifying Handset

Restricted Dialing

Record Disable

Dial Intermix

D-180494 Kit of Parts

G6-, G7-, or G8

446F Diode

Type Handset

D-180818 Kit of Parts

(See Note)

Decorative Faceplate

872B1 108 (Teak)t

Head Telephone Set

Operation

872B1 109 (Walnut)t

Plantronics Jack Set Model

JS180 l or JS180-2

Tables provided for

Plantronics Jack Set

Desired Head Telephone 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.

CONNECTION PER

FIGURE

8(C)

TABLE

D,E

B,C

B , C

B,C

8(C)

8(D,E)

8(B) tl(D)

CorE

C,E, or F

H,l

8(H)

Page 5

SECTION 503-603-1 02

• Kit of Parts, D-180494 (for conversion to

4-wire service)

• Kit of Parts, D-180818 (Record Disable and

Dial Intermix)

Note:

This kit of parts may be used only with sets equipped with an 8708 Memory.

• Faceplate, 87281-*

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)]

* 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 depr e ssed 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 the automatic dialing sequence [used where access digit(s) required].

3. INSTAUATION

STANDARD INSTALLATION

3 .

Make all wiring changes and telephone set modifications (Table A) before external connections are made to the set (4.01).

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.

3.02

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.

Note:

Wire date of installation on label provided on battery.

3.03

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.

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

loosened retainer clamp or metallic outlet cover making contact with the ac prongs of the power unit when partially

Page 6

RECORD

635 TYPE

KEY

ISS 2, SECTION S03-603-1 02

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.

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.

3.05

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.

3.06

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.

3.04

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.

(4) Replace the caps so that small bumps on side of caps are on sides of buttons.

Page

Tf: fTMI NAL

BOAfTo

TB;>

Rg .

3-872<JAO ''''Phooo ,_, IW•h '

Page

acep

ate, Upper Hoosing, Handset , and Handset

Cradle llerno"ed

ISS 2, SECTION 503-603- I 02

Installation Check Procedure

3.07

Check telephone set installation per the following tests (refer to Part 5 for operation).

In case of failure, refer to Table N, Trouble

Analysis.

(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.

(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).

(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 must go out.) dialed .

(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

(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

OPTIONAL APPARATUS INSTALLATION

D- 180568 Kit of Parts (Speakerphone)

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 503-6031

TABLE B

CONNECTIONS- 872A1M TELEPHONE SET WITH 38 SPEAKERPHONE

COLOR

CONNECT

APPARATUS

T e

I s e t

DESIG

B or Bl

LEAD

Ror Rl

V·G

G·V v-s s-v

V-BR

BR-V

FROM

872A1M

TEL. SET

INOTE 1}

TOPSB

TERM.

55 A

FROM

CONT

UNIT

558

D 180568

Kit of

Parts

666B

TRMTR

(T7A Cord)

B or Bl

SHi

SHa

VDD

-15V s

BL-R

G-W

R · BL

W·G

S·BK

BL·R

BK·S

Q-BK

Y·O

G-Y

BK·O

760A Lspk

(R2FK Cord)

SPl

SP2

33:j:

29:j:

95Bl

Pwr Unit

ACl

AC2

2012B

Trnsf

ACl

AC2

*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.

149BADPT

IDIOR

CORD}

TERM.

12A

11A lOA

9A lB lA

3B§

4B §

Page 10

ISS 2, SECTION 503-603-102

TABLE C

CONNECTIONS- 872A1M TELEPHONE SET WITH ONE-TOUCH CALLING USING 38 SPEAKERPHONE

APPARATUS DESIG

LEAD

COLOR s e t

T e

)

D-1804 9 3

Kit of

Parts

(Note 2)

0 · 180568

Kit of

Parts

SPO

R or Rl

R or

SPR

COM

SPO

OTT

SHi

SHa

VDD

B or Bl

STRAP

INPUT

VDD

Switch

V·G

G·V

V·S

S·V

0-V

V·BR

BR·V

0-R

BL · Y s s

BL-R

G · W

R · BL

G · R

O·BK

G · R

0 Y

Y · G

R · O

Y · BL

Y · O

BK·O

G Y

W·G

FROM

•

872A1M

TEL SET

(NOTE 1)

PSB·11

PSB 18

PSB-23

TO PSB

TERM.

• 3

•

55 A

FROM

CONNECT

CDNT

UNIT

558

1498 ADPT

(DIOR

CORD)

TERM.

9A lB lA

12A

11A

5B lOA

CONN

CABLE AT

KEY EQUIP.

COLOR

O·V

•

Page 11

SECTION 503-603- I 02

TABLE C (Cont)

CONNECTIONS- 872A1M TELEPHONE SET WITH ONE-TOUCH CALLING USING 38 SPEAKERPHONE

CONNECT

APPARATUS DESIG

LEAD

COLOR

872A1M

TEL SET tNOTE 1)

FROM

CONT

UNIT

1498 ADPl

IDIOR

CORD)

CONN

CABLE AT

KEY EQUIP.

FROM

TOPSB

TERM. 558

TERM. COLOR

S·8K

8L-R

6668

Trans

(T7A Cord)

760A

Lspk

(R2FK Cord)

-15V s

SP1

SP2

8K·S

0·8K

Y-0

G-Y

8K·O

33t

29t

9581

Pwr Unit

AC1

AC2

8L·V

V·BL

20128

Trnaf

AC1

AC2

*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.

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.)

(5) Make connections per Table C, E, or F.

(7) Verify correct operation of option.

(8) Reassemble set.

D-180494 Kit of Parts (2/4-Wire Service)

3.10

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).

(6) Break off the detail at the bottom of the cover (Fig. 2) and trim edge as required.

D- 180818 Kit of Parts (Record Disable and Dial

Intermix Features)

3. II

To install.

Page 12

ISS 2, SECTION 503-603-102

TABLED

CONNECTIONS- 872A1M TELEPHONE SET WITH 4A SPEAKERPHONE

APPARATUS

LEAD

DESIG. COLOR

V·G

G·V

872A1M

TEL

SET

828

CONN

BLK

INOTE

CONN

CABLE

AT KEY

EQUIP

FROM

TOPSB

TERM .

•

COLOR

872A1M

Tel Set

1).180568

Kit of

Parts

SHi

SHa

V·S s-v

V·BR

BR·V

BL·R

G-W

R-BL

•

(Note 2) t

85B1

POWER UNIT

95B-TYPE

POWER UNIT

85B1

POWER UNIT

VDD

AC1

AC2

AC1

AC2

AC1

AC2

W-G

BK y

AC1

AC2

Strap

AC1 to 24

Strap

AC2 to 49

BL·V

V·BL

BR·V

V-BR

•

AC1

AC2

AC1

AC2

BL-V

V-BL

AC1

95B-TYPE

POWER UNIT

AC2

• Insulated and stored. tTerrninal on network.

:j:Preferred power connections.

§AJternate power connections.

Noles:

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).

(2) Loosen the captive screw at the bottom of the cover around the dial and remove the cover.

(3) Disengage the four captive memory mounting screws (Fig. 4).

(4) Remove the two dial mounting screws and move dial aside.

(5) Rotate left edge of memory upward as shown by Fig. 5.

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

APPARATUS

872A1M

Tel Set

D-180493

Kit of

Parts

(Note 3)

(Note 4)

D-180568

Kit of

Parts t

85B1

PWR UNIT

95B-TYPE

PWR UNIT

V-S

S-V

0-V

0-R

BL -Y s s

BL · R

G-W

R·BL

W-G

BK y

Y-G

R-0

Y-BL

Y-0

BK -0

G-Y

V-BR

BR -V

G-R

0-BK

G-R

0-Y

CONNECTIONS- 872A 1M TELEPHONE SET WITH ONE-TOUCH CALLING

USING 4A SPEAKERPHONE

DESIG

LEAD

COLOR

828

CONN

BLK

(NOTE 1)

CONN

CABLE

AT KEY

EQUIP.

COLOR TO

V-G

G-V

FROM

•

872A1M

TEL

SET

TDPSB

TERM

SPO

VDD

SPR

COM

SPO

DTT

Input

Switch

SHi

SHa

VDD

AC1

AC2

AC1

AC2

•

(Note 2)

Strap

10 to 35

AC1

AC2

0-V

BL-V

V-BL

•

Page 14

ISS 2, SECTION S03-603- I 02

TABLE E (Contd)

CONNECTIONS- 872A1M TELEPHONE SET WITH ONE· TOUCH CALLING

USING 4A SPEAKERPHONE

APPARATUS

DESIG

LEAO

85B1

PWR UNIT

95B · TYPE

PWR UNIT

AC1

AC2

AC1

AC2

Insulated and stored . t

Terminal on network

Perf erred power connections.

Alternate pow e r connections .

COLOR

872A1M

TEL

SET

FROM

TOPSB

TERM

828

CONN.

BLK

(NOTE 1)

Strap 24·AC1

Strap 49 · AC2

CONN

CABLE

AT KEY

EQUIP.

COLOR

BR·V

V·BR

BL · V

V · BL

AC1

AC2

AC1

AC2

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 , conn e ct 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 S03-6031 02

TABLE F

CONNECTIONS- 872A1M TELEPHONE SET

WITH DIAL TONE DETECTOR ONLY (SEE NOTE)

LEAD

872A1M

TEL SET

APPARATUS

872AlM

Tel Set

0·180493

Kit of

Parts

DESIG

Strap

Input

VDD

SPR

COM

SPO

COLOR

G·R

O·BK

G·R

O·Y

Y·G

R·O

Y·BL

Y·O

BK-0

G-Y

O·R

FROMPSB

TERM .

TO PSB

TERM .

•

DTT

BL·Y

Switch t s s

*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.

• Record disable and dial intermix features.

(a) RECORD lamp will not light when

RECORD button is depressed.

(b) No telephone numbers ca n be recorded, changed, or deleted in memory.

(d) Manually and automatically dialed digits may be intermixed.

(10) Reassemble set

Single-Line Service

3.12

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.

(1) Remove the faceplate, key collar, and all buttons of the 635-type key.

(2) Gain access to terminal area (3.17).

(3) Remove the cradle (3.20).

Page 16

TABLE G

CONNECTIONS FOR 2/4-WIRE SERVICE

APPARATUS COLOR

872AlM

Tel Set

D-180494

Kit of

Parts

BK-G

BR·V

V·BR v s

Y BR

BL·R

G BK

R · BR

R 0

BL · Y

*Insulate and store .

REMOVE

FROM

•

CONNECT

•

PSB-13

PSB-21

•

PSB-13

R s

PSB-21

TABLE H

CONNECTIONS FOR CONVERSION TO SINGLE

LINE SERVICE WITH BRIDGED RINGING

DESIG

LEAD

COLOR

Tip

Ring

W-BL

BL-W

A-Lead

Y S

S-Y

W-0

Hold

LRS-1

Y-BL w

*Insulate and store.

REMOVE

FROM

CONNECT

(1 PU-3) Net. K

(1 PU 6) TB1·13

Net. K

TB1-13

•

(1 PU 1)

TB1-1

TB1 3

•

PSB-20

TABLE I

CONVERSION TO BRIDGED RINGING ON FIRST

LINE WITH 6-BUTTON KEY SERVICE

DESIG

LEAD

COLOR

Tip

Rin g

W BL

BL W

S -

* ln s ulat <' a nd s t o r e .

REMOVE

FROM

( I PU -3 ) *

(1 P U-6)*

Not. K

TBL 1 3

CONNECT

N e t. K

TBL 1 3

•

ISS 2, SECTION 503-603-102

(4) Make connections per Table H.

(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.

Head Telephone Set

3.13

To install.

(1) Remove housing (3.21).

(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.

(6) Insert head telephone set plug into jack set.

Other optional components

may

be

used

such

SPOKESMAN»,

loudspeaker sets, etc. Refer to the appropriate section for connection information for these components.

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):

• Buzzer

• Ringer

• Switchhook assembly

• Handset jack

• Terminal boards (TBl and TB2).

Page 17

SECTION S03-603- 1 02

(b) Under the faceplate, inside the set (Fig. 4 and 5):

• Battery jack (Fig. 5)

• Power supply board (PSB) terminal area

(Fig. 4)

• Network (Fig. 4)

• Options (Fig. 4):

D-180568 (relay kit for speakerphone)

D-180493 (dial tone detector and one-touch calling switch kit)

D-180494 (2/4-wire relay kit)

D-180818 (record disable and dial intermix switch).

• Battery.

Mounting Cord

3 .

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.

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

For access to the network terminals.

(1) Remove the faceplate (3.19).

(2) Loosen the captive cover screw at the bottom of the white cover around the dial (Fig. 2).

(3) Remove the cover.

(4) To replace the cover, the three tabs of the cover (one at the top center and one at each side just above the dial) must be aligned with holes in the chassis before the screw is refastened.

Failure to do this will result in improper seating of the faceplate.

Power Supply Board (PSB) Terminals

3.17

To access the terminal field on the power supply board, proceed as follows.

(1) Remove the faceplate (3.19).

(2) Loosen the captive cover screw at the bottom of the white cover around the dial (Fig. 2).

(3) Remove the cover.

(4) Remove the two screws that hold the dial in place.

(5) Gently raise the dial and move aside.

(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

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.

Caution: Do not damage contact strips which protrude from the right side

Page 18

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.

Faceplate 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.

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.

Handset Cradle Removal

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

S E CTION 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.

(5) Replace the handset cradle by sliding it sideways to engage the clips with the mating tabs in the side of the housing.

3.21

Caution: The plunger must be held from the top side of the cradle

it is slid into position to prevent damage to the switchhook arm.

(6) Refasten the captive cradle s crews.

Housing Removal

To remove, proceed as follows.

(a)

Lower housing.

(1) Unplug the handset cord, at the telephone set end, and remove handset.

(2) Remove the faceplate (3.19) .

(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 .

(5) Separate the housing from the telephone set base.

!' a ge 20

ISS 2 , SECTION 503-603-102

(6) Feed mounting cord through hole in bottom of housing as housing is removed.

(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.

(8) When replacing the housing, keep the handset jack from being trapped between the housing and chassis

Fi g . 6-872A 1M Te l ephon e Set , Bot t om View

(b)

U pp er hou s ing .

(1) Remove the faceplate (3.19).

(2) Disengage the captive housing screws located in each co rn er of the upper h ousing, (Fig. 2). This will release t h e lower h o u sing.

(3) Pull the upper housing away from the c h assis as each housing screw is backed out. T h is will separate the upper housing from the chassis.

Page 21

SECTION 503-603-1 02

(4) If necessary,

(5) To reasemble, reverse procedure.

4. CONNECTIONS thread screws out of housing.

4.01

Telephone set connections are shown in

Fig. 8 and Table J.

Caution: Some conductor assignments

are

not standard (Table

J).

4 .

Refer to Table A for connection information for all options.

4.03

A partial functional schematic is shown in

Fig. 14.

5. OPERATION

Record A Number Into Memory

5.01

To record.

(1) Remove the faceplate (3.19).

(2) Write or type the desired name and telephone number for a selected memory button on the associated position of the directory sheet.

(3) Replace the faceplate.

(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.

(b) Push the WAIT button when the RECORD lamp relights. (The WAIT entry counts as one digit.)

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.

(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.

Change A Number In Memory

5.02

Whenever a new number is recorded in a previously used memory position, it will automatically replace the previously stored number.

Delete A Number From Memory

5.03

Complete the following operations in succession.

(1) Depress the RECORD button.

(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.

Page 22

117

VAC

( NOTE S

1 ANO 4)

TOUCH-A-MATIC

TELEPHONE

SET

---(NoiTi) ______ _..

MOUNTING CORD

ISS 2, SECTION S03-603- 1 02

1498 ADAPTER

(NOTE 2)

/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.

NUMBERS IN PARENTHESES I NO I CA TE

CONNECTOR PIN NUMBERS

TO KEY TELEPHONE SY S TEM

(NOTE 2)

: : 0-STATION

___ _

66E3-2~

CONN BLOCK

(NOTE

11 7 VAC

(NOTE S

AND

, . - - - - - - c.o.

KEY TELEPHONE SYSTEM

~--

O-S TAT I ON

- - . .

WIR[

.>---

-

66B4 -2 5 CONN BLOCK

OR EQUIVALENT

Fig. 7 -872A 1M Telephone Set , Alternate Power Connection Method

117 VAC

(NOTE S

1 AND 4)

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.

LAST NUMBER DIALED Feature

5.05

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.

5.06

Operation of LAST NUMBER DIALED feature.

(a) With no access digit(s) required.

(1) Go off-hook.

(2) Listen for dial tone .

(3) Manually dial telephone number.

(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 .

LAST NUMBER DIALED button.

(b) When an access code and pause for second dial tone is required.

(1) Go off-hook .

(2) Listen for dial tone .

(3) Dial access digit(s).

(4) Depress WAIT button, after second dial tone is heard.

(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 .

(b) For sets equipped with the dial tone detector only, go off-hook, listen for dial tone, and depress LAST NUMBER

DIALED button.

LAST NUMBER DIALED button .

MAINTENANCE

6.01

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.

(4) If

remov~l

of set is required, proceed as follows:

(a) Disconnect telephone set.

(b) Unplug battery.

Page 24

ISS 2, SECTION 503-603-102

Caution: Failure to restrain plug can result in plug damage necessitating battery replacement.

Battery

6.03

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).

(1) Tilt the front of the set up.

(2) Unplug the battery.

(3) Loosen the captive screw on the battery support .

(4) Remove battery support.

(5) Remove battery.

(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).

(2) Loosen the four captive memory mounting screws (Fig. 4).

(3) Rotate the left edge of the memory upward as shown in Fig. 5 .

(4) Disengage the connector by pulling it perpendicular to the printed wiring board.

(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.

(6) Reassemble set .

(7) Test per 3.07

Dial

6.05

To replace.

(1) Access PSB terminal area per 3.17.

(2) Disconnect dial leads and remove dial.

(3) Install new dial by reverseing procedure.

6-Button Line Key

6.06

To replace.

(1) Remove key per 3.18.

(2) Access PSB terminal area per 3.17.

(3) Disconnect logic reset leads from PSB terminals 10 and 20.

(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.

(1) Remove the faceplate (3.19) and place the handset aside .

(2) Remove upper housing, if provided, [3.21(b)].

(3) Remove the cradle (3 .

20).

(4) Disconnect the ringer leads (Fig. 81).

(5) Tilt the front of the set up.

(6) Unfasten ringer mounting screws (Fig. 6).

(7) Remove ringer.

Page 25

SECTION 503-603- 1 02

(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 .

(1) Remove the faceplate (3.19) and place handset aside .

(2) Remove upper housing, if provided, [3.21(b)].

(3) Remove the cradle (3 .

20).

(4) Remove the buzzer mounting screw.

(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.

(1) Remove the faceplate (3.19) and place handset aside.

(2) Remove upper housing, if provided, [3.21(b)].

(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.

Handset

6.10

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.

(1) Unplug H4DU handset cord at telephone set end.

(2) Remove faceplate (3 .

19) and place handset aside .

(3) Remove upper housing, if provided [3.21(b)].

(4) Remove handset cradle (3.20).

(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.

Faceplate

6.11

To replace an 872A1-87 faceplate with an

872B1 faceplate .

(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

Page 26

ISS 2, SECTION 503-603-102

in the lower side of the 870A1U-type upper housing .

(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.

Speakerphone

6.12

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 .

Page 27

SECTION 503-603- 1 02

TABLE

MOUNTING CORD AND 508 PLUG CONNECTIONS

R(1)

T(1)

A(1)

L(1)

1 BL · W

26 W-BL

0 -W

27 W-0

3 G-W

LG(1) 28 W-G

R(2) 4 BR ·W

T(2)

B(2)

A(2)

W-BR

5 S·W

30 W-S

L(2)

BL R

LG(2)

31 R·BL

R (3)

T(3)

B( 3)

A(3)

7 0-R

3!! R-0

G-R

R·G

L(3)

BR-R

LG(3) 34 R · BR

R( 4)

T(4)

B(4)

A(4)

L(4)

S-R

R -S

BL BK

36 BK-BL

12 0-BK

LG( 4) 37 BK -0

R(5) 13

G -BK

T(5) 38 BK -G

B( 5)

A(5)

BR·BK

BK-BR

L(5) 15

S-BK

LG(5)

40 BK ·S

BZ1

16§ BL Y

41§ Y-BL

* Insul ate and store.

AMPHENOL

PLUG

DESIG

NO.

COLOR

MTG CD TERMINATIONS

SPADE TIP

COND .

MTG . CD

508 PLUGS

COLOR PIN NO.

TB1-12

•

TB1-7

•

TB1·9

BR s s

•

TB1-4 s s

TB 2·11

TB2·5

INSIDE TELEPHONE SET

PLUG

COLOR

SPADE TIP CONDUCTORS FROM

508 PLUGS.

PLUG PIN

NO .

COLOR

BL-W

W-BL w

W·O

BR s s

S-W y

BR v s

TERM.

•

TB1·3

•

TB1-2

TB1·2

T B 1·7

TB1·2

T B1 ·9

TB1·2

TB1-4

Page 28

ISS 2, SECTION 503-603- 1 02

TABLE J

(CONTI

MOUNTING CORD AND 508 PLUG CONNECTIONS

DESIG

NO.

COLOR

Spare 17 0-Y

Spare 42 Y-0

HL 18 G·Y

HLG 43 Y·G

BR-Y

Y-BR

R or R1 20 S·Y

B or 81 45 Y·S

AC1t

21§

BL·V

AC2t

46§ V-BL

SPO~

22§ O·V

Spare 47

V-0

RI+

Tl~

LK ~

P4-1Rt

24 BR V

P3-1Tt 49

V-BR

G·V

V-G

S-V

AG~

50 V·S

Tip

Ring

AMPHENOL

PLUG

SPADE

MTG CD TERMINATIONS

TIP

COND IN .

MTG.CD

508 PLUGS

COLOR PIN NO.

•

PSB·26

PSB-27

TB1-5

TB1-6

TB1-13

Net. K

PSB-24

PSB-25

•

Net. T

•

INSIDE TELEPHONE SET

SPADE TIP CONDUCTORS FROM

508 PLUGS .

PLUG

COLOR

PLUG PIN

NO .

COLOR TERM. s s

Pink

HLG

BR·W

W-BR

Y·BL

TB1·8

PSB·9

PSB26

PSB ·27

•

TB1·1

TB1·3

· -

*Insulate and store.

t95Bl Power Unit

~Designations for speakerphone options. Refer to Tables B through E.

Non-standard pin numbers.

Page 29

SECTION 503-603-1 02

TABLE K

TO CONVERT THE 872A1M TELEPHONE SET

FROM 1A1, 1A2, TO 1A OPERATION (See Notel

LEAD

DESIG

SHb

HOLD

RING

SHct

Net. F:j:

COLOR y

Y-BL

R-BL

FROM

(1A1,1A2)

TBl-12

TBl-3

*(Pink

508 Plug)

TB1-1

PSB-9

TB1-1

(1A)

TB1-5

TB1-16

TB1-3

Net. L2

TB1-6

*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 L

CONNECTIONS FOR D-180818 KIT OF PARTS

D-KIT

SWITCH LEADS

TERMINAL POSTS FOR SWITCH

LEAD CONNECTORS

DESIG.

COLOR

(NOTE 1)

RECORD

DISABLE

ONLY

RECORD DISABLE AND

DIAL INTERMIX

(NOTE 2) woe

BK t *

VDD

R 2

RCRD BK

*Insulate and store. tSingle pin connector.

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.

TABLE M

CONVERSION OF KEYS FOR SIGNALING

508 PLUG

Key

Functionst

508 PLUG

Key

Functionst

COLOR:

PIN NO:

LEAD COLOR:

HPPPPP

HPPPPS

HPPPSS

HPPSSS

COLOR:

PIN NO:

LEAD COLOR:

HPPP*P*S

HPP*P*P*S

BLUE

2 w

TB1-3

SELECTIVE SIGNALING

ORANGE

TB1-2

GREEN

TB1-2

TBl-2

TB1-5

COMMON SIGNALING (SEE NOTEI

BLUE

2 w

TB1-3

ORANGE

TB1-3

TB1-2

GREEN

TB1-2

BROWN

2 y

TB1-2

TB1-5

BROWN

2 y

TB1-2

2 v

TB1-2

SLATE

TB1-5

1 s

TB1-4

2 v

TB1-2

SLATE

1 s

TB1-3

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

ISS 2, SECTION 503-603-1 02

0-180818

FIG. A

FIG. B

POWER SUPPLY BOARD

KIT OF

PARTS MEMORY

2 or.r

"' ~

" "' >

1/00 1

V00-2

OTT

SPR

COM

V00-1

RESET

>--==.:._-l

VD0-2

VDD-2

13>------

PB so

IOP'

VGL

OOP'

PSB (SEE NOTE l

( G-BK)

I R-G l

zc(_f--<~~~:~--~~G~-2R~I------------------~I~NP~U~T~

-\_I--<

\!..1

IV-G)

5?-1--<

(Y).~._

I'-'.V _,-Be::R'-11

IBLl

0-r----<..-~ !!!IB~R-:::,V!.-11 e(::b-<

@ 10-BKI

FIG . I<

BR-R

~---------------+--------'~·~K-~G~

FIG J

,.£ r-<

,':;VII FIG . K RING

9 ~ r-<~@~z~-+IG~-~R~I~--1---~~~-~~N~P~U~T t 0R-YII

FIG . I

0-++---:::--_!.!~_:--~1-..!Lo!R~S,::-2~

II[._

f-<

@ 10-YI

FIG L

21, .,_-t

1--<

--'~"'y

STRAP (BK)

'-t--'1

G . K

G . H ry:;:z-,

~~~~-...:I..!.Y~-~G~I---1-------f--~L~K~

1--<

rl--<

(!) I G-WI

SHi

FIG .

IBL)

IYI

BATTERY

8IY I

IBKI

I SKI

8+ I Rl

P2 J2

WITHOUT DIAL TONE DETECTOR

WITHOUT SPEAKERPHONE

(!) WITH SPEAKERPHONE

NOTE :

SET FACTORY WIRED FOR

AND ®OPTIONS

IY I

IBKI

(SKI

IRI

(!}

WITH DIAL lONE DETECTOR

(!),@, a~

<E!::D

WITHOUT ONE-TOUCH CALLING

*

INSULATE AND STORE

3 : HA

RELAY

FIG . G

14 ~A~r--~==~----~~o~-~·~~~

15~f--<•GGJD=v=tz~-T,ts~lw.~--+-------f---f--J-~SI~

IG-WI

FIG

d--f--<

(!) IR-BLII

* _

_!.i~BK~-:_o:B:=L.!.I-1

"~

(BR-Wl

SHo FIG C

...:,I~W _,G~l~~~---------'V~O~D

____________________ v~D~D

IWI

18

4--,_._---,

~1--<' ~SP~R~

\._ 1--<

\_ 1--<

-STRAP IBKl

I"'

_,@"'--1-+j-'I.:..,Y-_,O:,ci _ _ _ _ _

IWI

~-----"D~R

(Wl LRS-1

FIG L zo~f---<·(~Y~t~~~~IS~l------~------f--~s~

\_1--<~@~z~+-~IB~K,::-0~1~---------~CO~M~

GQ--1--<•{ill)"'="+~Z

G K

\_ 1--<

IG-YI SPO

220-f--<~ ~" 1 ~----------------~P~L~

~---<--'@~z:___7,IB~L~

~Y~I----------~DT~T~

M0-+------~~~~~~~~~:~

FIG . K

FIG E

28::;:

(BR-WI

26A

27A~~----------~'v~~~~~

IW-BRI

(W-BRl FIG. I

HLGIFIG L

Fig. 8-872A 1M Telephone Set, Connections (Sheet 1 of 4)

Page 31

SECTION 503-603-1 02

SHO

( R-BL)

FIG . B

SHI

( BL-Rl

(G-W)

VDD (W-G)

FIG. C

RELAY PRINTED

WIRING BOARD

( D-180568)

FIG . 8

(Sl

FIG. E

ONE-TOUCH

CALLING SWITCH

(0-180493)

INPUT

(G R)

INPUT

(0 BKl

( G -R)

(Y -G )

VDD

FIG . B

OTT

(0 Y)

( R -0 )

(Y 0)

(O R)

(BL Y)

SPR

COM

SP O

( Y-BL)

(BK-0) t G -Yl

FIG. D

DIAL TONE DETE C T O R t D-180493)

FIG. F

SWITCH HOOK

(Sl

Y'-'lc_ _ _ _ _ _

FIG .

( BR)

(Gl d d

(W) e

*· f (R) f

IBKl

FIG .

(BL) h h

( BLl

*' j

(0)

10) i j k

FIG. G

DIAL

DP -

DIAL PULSE

ON -

OFF NORMAL

Fig. 8-872A 1M Telephone Set, Connections (Sheet 2 of 4)

( BL)

(BL)

IY)

(Y)

FIG . 8

( W)

Page 32

ISS 2, SECTION S03-603-1 02

FIG. J

I 10-BKI

FIG. K

I IY·BLI

FIG J

FIG. B

(Y-Bll

(Y-Bl)

FIG. K

I IBL-YI

F I G. J

IB R-Y)

FIG F

!BK-BLI

' d

IWI

IGI

I BLI

FIG.

TB2 c - - -

G:D

'U.XJ

IBL I

I BLI

67?>

IBKI

~ FIG.

BUZZER

FIG

F c

FIG

IGI lVI

IYI

{BKJ

IRI

IWI

(Y-Bll

I Sl

(SRI

FIG. I

TBI

. - - -

\ 2

IR-BLi o

FIG

(BK-BRI lO-RI

(BR-Wl

(BR-A)

FIG

F IG. H h f

•

(RB ll

( B LW )

10BKI

IB R-YI

(V- Bll

(Y-Bll

I BLI

IRI

( BK)

77?>

Gl5

HAN

DSET

(BK)

~ tWit

I t

J5 P5 (BKI

:~ tWit

I ~

I ll-_

IRII_~

IGI

I '

IG I

FI G. F j o

I .

IS-WI

TtPIGI

IBRI

PIS RINGfR

FIG.

NETWORK (NOTE I OR 21

G:D

,'!,.

(Y-S)

F I G. H

IBK )

h..

tv-ol

FIG. K

I Sl

I Y

(BK)

N O T ES:

I. PH YSICAL TE RM IN A L LAYOUT OF

425K NETWORK

<a_to

0:0

' - - - -

CRI

4 76F

IBR-Y)

(Y-BR)

IR-GI

IBK- BLI

10W l

IS-Yl

FIG

(W-BR)

IG-W)

IBL-W)

FIG. J

(0-Y )

2. PHYSIC A L TERMIN A L LAYOUT OF

4228-TYPE NETWORK

FIG

!... 0

IR-GI

FIG 8

£h.

IBK-GI

;..•r:l

IGB KI

.3....

......... STRAP

L _ _ _ _

(!)

WITH SPEAKERPHONE

I NSUL A T E A N D S T ORE t

IF N O NM ODULAR AMPLIFYING HANDSE T

I S U S ED , YE L LO W L EA D M UST BE

C ONNE CTED TO TER M I N AL 10 .

T F

0 0

/ZJ

Ll f f i )

§

QJRR

a§

{Jl

f f i )

GN f f i )

Fig . 8 872A1M Telephone Set, Connections (Sheet 3 of 4)

Page 33

SECTION 503 603 1 02

FIG. K

MTG CORD

IV-SI

(5-V)

(V-BRl

IBR-V)

(V·G)

(G-VI

92 (5-W)

(G-RI

(BL-BK)

~=~RE

( BR -BK I M-

(0-V)

IGWl

!V-Ol

LGI

IW-G)

lA, IH (W-0)

•

(G-YI

(Y-G)

:!'

(W-BL)

IBL-Yl

(Y-Bll

I BL-WI

FIG H

FIG B

LG2

SPARE

IBL-Rl

(R BL)

(W 51

(W-9RI

(0-YI

(Y-O)

IBR-W)

FIG J

LG3

3A, 3H

IBR-RJ

IR-BRI

~~WR

AC PWR

(R-01

(0-RI

- -

IBL-V)

(V-BL)

(R:.§l_

L R S1

LRS-2

HLG

(Y9 LI

(G)

FIG B

FIG

!WI

(W-0)

(BL-Wl

(RI

(5-W)

(9KI

LG4

4A 4H

(0-9KI

(81<-0l

IR-S)

(5 Rl

IY-SI

IBK-BL)

(5-Y

FIG

LG5

!BK-Sl

5A 5H

ORS

AI 9

15-BK)

(BK-G)

R5 (G-9KI

"

IBK-BR

10-W)

IBR-Y)

IY-BRI

*-INSULATE AND STORE

IBRl

(Y)

RI N G

(5)

!VI

TIP

!GI

(R)

FIG. L

(W)

(8RI

508

PLUGS

635-TYPE KEY

LOGIC

RESET

SWITCH t

(9R-WI

(W-9RI

(9LI

(G-WI

(W-GI

(W-0)

{W-BU

IBL-W)

' - - -

HOLD

7>-

)):_

2 h

(----

h '

>--

L..t

ORAN~E

(BL-RJ

(R-BLI

(W-5)

(W-9RI

IBRWl

IBR-RI

( R -9 RI

( R-0)

(0-RI

GREEN

">-

) - -

_ ; e )

-:_t

>--

_ j

>--

~·

>--

......:.J

(0-BK) tBK-0)

(R-Sl

5-R

BROWN

' - - -

>--

-:t

>--

__j

ISBKl

(9K-S I

( BK-G I

IG-BK)

.,_

):_ h

~>--

F i g . 8-872A 1M Telephone Set , Connections (Sheet 4 of

Page 34

ISS 2, SECTION 503-603-1 02

(S)

PSB-16

(G-W)

TBI-11

MTG. CORD

- - ( Z

AI (O-Wl

TBI•IZ

(Y)

(BR) f NETWORK

(R•Bl)

TBI•I

TBI·6

-<H

BL( Y-BRI

-<"k"'

(BLI

1ST

* _ _ j lA (W·O)

2ND

(w-s)

3RD

3A (R•G)

TBI·7

(S•W)

4TH

TBI•9

4A(BK•Bl) (BR) I

~TH

TBI•4

SA (BK·BR)

(S)

CRI

476F

TBI·IO

(W)

(R)

(BK)

(Y)

®

(;)

HOLD

(Y·Bl)

TBI·3

STRAP

(U)

TBI·Z

<.W

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)

WITHOUT STATION BUSY LAMP

(!)

WITH STATION BUSY LAMP

"I" HOLD OPTION

Fig. 9 - "I" Hold, Exclusion, Station Busy Lamp, and Add-On Conference-! A 1 and 1 A2 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

117 V AC

A25B CABLE

TO KEY TELEI'HONE SYSTEM (SEE NOTE l

NOTE' DISCONNECT Tl£ (V-l!L) IN THE CABLE A T KEY SYSTEM ENO

Fig . 10-Biock Diagram-872A 1M Telephone Set Using 38 Speakerphone

Page 36

T O UCH-A-MAT I C

T ELEPHONE SET

6-BUTTON L1 NE KEY

~OUNTI NG

C ORO

ISS 2, SECTION S03-603- 1 02

POWER

C UT OFF

MODE

8 2 B CONNECT I N G

BLOCK

085-87

CO RO

A2 5 B C ABLE

' - - - - TO KEY TELEPHONE

!NOTE

2 )

SYST E ~

NOTES:

1. STRAP NECESS AR Y O t4. Y IF SET IS AlSO

EQUI P PED W I T H D I Al TONE DETECTOR TO

PROV I DE O N E -T OUCH CAl LI NG OPT I ON.

2 . IF POWER I S PROV I DED THROUGH KEY CABlE,

USE (BR-V) P AIR FOR 65-TYPE POWER UNIT

ANO S T RAP 24 TO AC1 ANO 49 TO AC2 ON

828 CO NN ECT IN G BlOCl<.

Fig. 11-Biock Diagram-872A 1M Telephone Set Using 4A Speakerphone

Page 37

SECTION 503-603-1 02

IGI

RCVR

IWI

IBKI

IGI

TB2

IBR·R)

IWI

,-.,

; I

..!.J

(R)

FW2

(BR)

!,.

POWE-;~

PSB

IBK-G)

IG·BK)

IBL·RI

"f

~GN

,!,..

FW3

MB7

42~·

(Y)I OR

4228-TYPE

NETWORI<

IG-BKI

IV-BLI s

POWER SUPPLY

PSB

13 (BR-V) RR

>--0--11-:::< ~24

TB2

I rJ@

IR-01

IRI

T82

IBR-YI

I BKI

STRAP

®

FW4

IBL-YI

., I

'V·BR) RT

~~49

IR BRI

'--+@

LEGEND .

WITHOUT 4·WIRE OPTION

WITH 4-WIRE OPTION

INSULATE AND STORE

IY BLI a

IBKI

TB2

4 WIRE CONTROL

IBLI

MTG CORD (V·OI

N~T . lVI

@ lSI

--<47~~

(S) TBI FW

NET .

(R-BLI

--<

AllO W) (SRI TBI (G)

2~----~o-~~~~~----~~--~~--~~~~ 1 HOLD

IY·BLI

- - < 27 l A (W·OI

TO OTHER

"A " LEADS l :

2 IWI

2 (R)

2 (BK)

1 _.1

~~·2__,_(Y.:_I,_...c+--*-e-2-(:..:V_;_l--'

TBI

Fig . 12-872A1M Telephone Set-2/4 Wire Connections

Page 38

ISS 2, SECTION 503-603-1 02

PSB-4

(BL)

PSB-5

OPR

TIP (G)

(NOTE) TB1-8

RING~

(NOTE) PSB-9

(!) (!)

DIODE

(!) -

WITH RESTRICTED DIALING

NOTE : REVERSE POLARITY ON TIP AND RING LEADS ON ALL

LINES WITH RESTRICTED OIALING .

PSB-2

(R-G)

NET RR

Fig . 13-Connections for Restricted Dialing Option

Page 39

PSB-7 ~

(BL)

PSB-5

_n.

M871

(IDP')

MB76

PSB-4

f A

IBLI tol87~

(G) TB:-:8

(II-BR)

PS~28 DPRt

~ 3

SPEAKERPHONE

orr

---41~'---

T I

SPO

(S-V)

(V-G)

M873

":J

(BR-V)

(G-V)

PSB-6

(G-R)

PSB-13

(Y-G)

(BL-R)

PSB-14 u

(G-Il)

DIAL TONE

DO ECTOR

D-1 80493 " [ '

(G-R)

SPO

(G-Y) (R-BL)

PSB-21

PSB-16

D-180568

RELAY

(II-G)

@L,

(o-v)

RELAY

(VIA 82B

CONNECTING

BLOCK)

K I l A - - - < 27

(11-0)

(11-S)

P\J

(v-s l

NET-r

PSB-9 (0-Y) AG

liNG---<

A I - - - < 2

P\J (R)

(R-BL)

TBI-1

(0-W)

f >

(Y)

(BR)

TBI-12 b f.Ls c

(G)

(II)

T~3

(Y-BL)

(R)

HOLD

(BL)

* a

(sl

2l - - - < 30

TBI-16

J>..

TBI-11

(BK)

(R)

TB212

(II)

TB2-I 0

PSB-2

(R-G)

(BR-Y)

PSB-1 (G-BK)

(Y)

(G)

TB2-8

_n.

GIS

TB2-13 f

M872 g

ON 1

(Y)

(BR-R~

(BK-G)

PSe-8

(Y-BL)

TB2-2

_n.

(G) d

•

(V-BL)

Ill TH SPEAKERPHONE

Ill TH Dl AL TONE DETECTOR

@AND@

Ill TH ONE-TOUCH CALLING

(II)

INSULATE AND STORE

DIAL PULSING RELAY IN SET

TB2-I

~RR

~I s

N[T.

2GN

(~ c

(0-BK

....

...

':"

...,

Fig. 14-872A 1M Telephone Set, Partial Functional Schematic

...

TABLE N

TROUBLE ANALYSIS- 872A1M

TROUBLE

NUMBER

FAILURE

Dead set on all Jines when off hook on handset

Dead set on all Jines when speakerphone only is on

Cannot transmit 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

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

Dial tone is speakerphone

Line lamp

handset not present is on . when

comes on when

is taken off-hook . Set becomes active when 95B power

unit is disconnected.

Defective receiver

Open tip or ring lead at

635-type line key

Unknown

Improperly installed or defective memory

Set is active when on handset. off-hook

Defective PSB

Improperly connected or defective speakerphone

Line lamp comes on. Dial tone

present, but sidetone absent .

Handset cord improperly inserted into either handset or jack in telephone set

Defective transmitter

Defective 616B jack

Defective network

•Refer to 6.02 (4)

REMEDIAL ACTION

Check cord insertion and

connections

1. Check handset cord connections

2. Check handset jack connections

Check handset

Check leads and connections from contact strips

Replace telephone set•

1. Check connector cable

insertion

2. Replace memory

Replace telephone set•

1. Check connections

2 . See appropriate speakerphone

BSP for trouble analysis

Check handset cord and/or handset

Replace transmitter or handset

Replace 616B jack

Replace telephone set•

I il:

Ill

w t

~ o.)

TROUBLE

NUMBER

FAILURE

Cannot manually dial when off hook on handset (dial tone is present).

Cannot manually dial when speakerphone is on. (Dial tone is present.)

RECORD lamp does not function properly

TABLE N

TROUBLE ANALYSIS- 872A 1M

(Contd)

ADDITIONAL SYMPTOM POSSIBLE CAUSE

Dialing clicks heard ( in handset) Bridged set off-hook

when dial is returning .

Speakerphone improperly installed or defective

No dialing clicks heard when dial is returning . Condition remains unchanged when 95B

power unit is disconnected .

No dialing clicks heard when dial is returning. With 95B

power unit disconnec t ed , set

can manually diaL

Set does manually dial when off-hook on handset

Improperly installed or defective rotary dial

Unknown

Improperly installed or

defective memory

Defective PSB

Improperly installed on defective speakerphone

RECORD lamp does not turn on when RECORD button is depressed.

Defective switchhook

AC power not present

Battery not connected

95B power unit not plugged

in or defective

Open in IW

Memory, RECORD OFF or

WAIT button stuck down

Defective logic reset switch

Switch of D-180818 Kit of

Parts in ON position

REMEDIAL ACTION

Place bridged set on-hook

Check appropriate speakerphone

BSP for analysis

L Check connections

2. Replace rotary dial

Replace telephone set*

L Check connector cable

2 . Replace memory

Replace telephone set*

L Check connections

2. See appropriate speakerphone

BSP for trouble analysis

Replace telephone set*

Check for commercial power

Connect battery

Check or replace 95B power unit

(should read 13.4 to 18 Vac

across screw terminals 24 and 25

on PSB)

Check IW and connections

Clear stuck button

Replace line key

Change switch position to

OFF

- -

"'

':"

0 o.)

*Refer to 6.02 (4)

TABLE N

TROUBLE ANALYSIS - ll72A 1M (Contd)

TROUBLE

NUMBER

6 (cont ' d)

FAILURE

7 Cannot record properly into the

31 memory positions or into

LAST NUMBER DIALED

position.

*Refer to 6.02 ( 4)

ADDITIONAL SYMPTOM

Lamps turns off when any memory button is depressed

Lamp does not turn off as dial is returning . No relay click heard at beginning of dial wind-up or at end of dial

return.

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.

Lamp turns off as dial is returning and stays off.

Can manually dial off-hook.

Record lamp functions

. properly and set dials manually

POSSIBLE CAUSE

Improperly installed or defective

memory

Unknown

Improp e rly installed or defec-

tive memory

Unknown

Improperly connected or defective rotary dial (off-normal contact)

Unknown

Improperly connected or defec-

tive memory

Unknown

REMEDIAL ACTION

1. Check connector cable

2 . Replace memory

Replace telephone set*

1. Check connector cable

2 . Replace memory

Replace telephone set*

1. Check rotary dial connections

2. Replace telephone set*

Replace telephone set •

1. Check cable

2. Replace memory

Replace telephone set*

Memory button was not depressed prior to the operation of the dial

Defective memory

Unknown

Defective memory

Unknown

Record per 5.01 (4) through (7)

Replace memory

Replace telephone set*

Replace memory

Replace telephone set*

iii

"'

...

TROUBLE

NUMBER

7 (cont'd)

FAILURE

Cannot dial properly from memory on handset.

TABLE N

TROUBLE ANALYSIS- 872A1M (Contd)

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

memory

MB7 relay does not operate

(no click heard) when memory button is depressed

POSSIBLE CAUSE

Check recording procedure

Defective memory

Unknown

Battery not connected

Memory not securely mounted

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 .

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.

Improper and/or defective strap from PSB terminal 18 to PSB terminal 20

Improper connection to or

defective memory

Unknown

WAIT button

or defective

Unknown is stuck down

AC power outage for 24 hours or longer

REMEDIAL ACTION

Record per 5.01 (4) through (7)

Replace memory

Replace telephone set •

Connect battery

Tighten memory mounting

screws

Check and/or replace strap lead.

See Fig . 8B

1. Check connector cable

2. Replace memory

Replace telephone

Reestablish ac set power

•

Free stuck WAIT button or

replace memory

Replace telephone set • and record

numbers into memory

... t

't'

*Refer to 6.02 (4)

...

TROUBLE

NUMBER

8 (cont'd)

*Refer to 6.02 (4)

FAILURE

Cannot dial properly from

memory when on the

handset (wired for dial tone detector option)

TABLE N

TROUBLE ANALYSIS- 872A1M (Contd)

ADDITIONAL SYMPTOM POSSIBLE CAUSE

Defective battery

Two or more memory locations have same digits which are

usually different from originally recorded digits

Automatically dials through a

"wait"

Defective memory

Unknown

Static discharge damage

Memory not securely mounted

Improper connection to PSB terminal 23

MB7 relay does not operate

(no click heard) when

memory button is depr esse d.

D efec tive memory

Unknown

Battery not connected

Pr ecise TOUCH-TONE dial

tone may not be present

Memory not securely mounted

Improper installation of dial tone detector D180493

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

Replace memory

Replac e telephone set*

1. Consult Telco Engineer for

proper grounding procedure

2. Replace memory

Tighten memory mounting screws

Check connection to and/or

replace strap to PSB terminal

Replace memory

Replace telephone set*

Connect battery

Make sure precise ( 350 Hz and

440 Hz) dial tone is present

Tighten memory mountlng screws

Check connections for D 180493

installation

- - -·· - -

;;;

"'

...

.... a co ct o-

...

TABLE N

TROUBLE ANALYSIS- 872A 1M

(Contd)

TROUBLE

NUMBER

9 (cont'd)

FAILURE

Cannot turn speakerphone on when ON button is depressed

(wired for speakerphone option).

ADDITIONAL SYMPTOM

Same as above -

Addition of strap lead between

PSB terminals 20 and 23 does not correct problem

Addition of strap lead between

PSB terminals 20 and 23 corrects problem.

Automatically dials through a

"wait.,

POSSIBLE CAUSE

Improper connection to or

defective memory

Defective memory

Defective dial tone detector

Unknown

Memory not securely mounted

REMEDIAL ACTION

Check connector cable

2. Replace memory

Replace memory

Replace D-180594 dial tone detector

Replace telephone set*

Tighten memory mounting

screws

Check installation of D -180493

Kit of Parts

Place handset on-hook

Improper connection to PSB terminals 23 and 11

Speakerphone indicator lamp

does not turn on , but line

lamp is on.

Handset off-hook

No dial tone heard, but indicator

Line button not depressed

lamp turns on.

Depress line button

With temporary strap lead

Improper connections or

added between PSB screw termidefective D-180568 Kit of nals 16 and 13, speakerphone Parts turns on when ON button is depressed .

Speakerphone indicator lamp

does not turn on and neither

does line lamp

Improper co nnections or

defective 85B1 power unit

Check connections replace to

D-180568 Kit and of

/or

Parts

With temporary strap lead added between screw terminals

Defective switchhook a-b contacts or connecting lead to power

11 and 12 on TB1, speakerphone supply PSB turns on when ON button is depressed .

1. Check (G-W) harness lead between screw terminal 11 on

TB1 and PSB terminal 16

2. Replace telephone set*

1. Check for commercial power

2. Check connections

B, C, D, and E per Tables

*Refer to 6.02 (4)

Ill

!:!

....

TABLE N

TROUBLE ANALYSIS- 872A1M (Contdl

TROUBLE

NUMBER

10 ( contd )

FAILURE

AODITIONAL SYMPTOM POSSIBLE CAUSE

Defective speakerphone

RECORD lamp does not turn off when speakerphone

ON button is depressed

(wired for speakerphone option) .

Cannot turn speakerphone off when handset is lifted off-hook (wired for speakerphone option).

With temporary strap lead added LK relay circuit defective on between PSB screw terminals 14 D 180568 Kit of Parts and 17 , speakerphone turns on when ON button is depressed and

RECORD lamp goes off

Operation of RECORD OFF Defective switchhook h-i or button or line key buttons turns j-k contacts

RECORD lamp off.

Speakerphone turns off when

OFF button is depressed but turns back on when OFF button is released

With the speakerphone ON button depressed , dialing click s can be heard .

Short circuit between screw

terminals 11 and 12 on TB1

Defective switchhook a-b contacts

Physical spacing between speakerphone, loudspeaker and

transmitter units is too close

Cannot hear dial clicks when dialing with speakerphone on

(wired for speakerphone option).

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

With temporary strap between

PSB screw terminals 16 and 20

speakerphone turns on when a

memory button is depressed

· - - · -- ------- - - -

~--

Battery not connected

With 4A speakerphone, strap not added on 82B block

One-touch calling switch turned off or defective

*Refer to 6.02 (4)

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)

See appropriate speakerphone 8SP for trouble analysis

Replace D 180568 Kit of Parts

Replace telephone set •

Clear short

Replace telephone set •

See appropriate speakerphone

BSP for proper placement of

units

Connect battery

Add strap from terminal 10 to

35 in 828 block

1. Turn one-touch calling switch on

2. Replace one-touch calling switch assembly of D-180493

Kit of Parts

' in

"'

...

0 o.)

..,

TROUBLE

NUMBER

14 (cont'd)

FAILURE

Speakerphone turns on but set does not automatically dial

when memory button is

depressed (Wired for one-touch option).

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).

*Refer to 6.02 ( 4)

TABLE N

TROUBLE ANALYSIS- 872A1M (Contd)

ADDITIONAL SYMPTOM

With temporary strap between

PSB screw terminals 13 and 21 ,

speakerphone turns on.

Set automatically dials when screw terminals 20 and 23 on

PSB are temporarily shorted.

POSSIBLE CAUSE

Defective dial tone detector

D-180493 Kit of Parts

Defective connections between

dial tone detector and PSB .

Defective dial tone

D-180493 Kit of detect

Parts or

REMEDIAL ACTION

Replace dial tone detector PWB assembly of D-180493 Kit of

Parts

Check (Y·G) and (G-Y) leads to

PSB terminals 13 and 21,

respectively

Replace dial tone detector PWB assembly of D-180493 Kit of

Parts

Insulate and store strap leads. ( BK) strap leads to screw termi nal s 11 and 23 on PSB

were not insulated and stored when option was wired

Precise TOUCH-TONE dial tone not present or a defective dial

tone detector

Defective timing circuit

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

1. Replace memory

2. Replace dial tone detector PWB assembly of D 180493 Kit of

Parts

Normal conversational level

on speakerphone.

Defective muting circuit

Replace telephone set*

':"

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"'"

.,.a

"'

"'"

TROUBLE

NUMBER

17 ( contd)

FAILURE

Set dials automatically but does not wait for dial tone

(wired for one-touch calling)

- - -

Automatic dialing commence s for no appar e nt reason (wir e d

for one touch calling)

- - - - - -

TABLE N

TROUBLE ANALYSIS- 872A 1M (Contd)

ADDITIONAL SYMPTOM

Speakerphone turns off when

OFF button is depressed but turns on when OFF button is released.

Speakerphone turns off and stays off when (Y · BL) lead is

disconnected from terminal

27 on PSB and OFF button is depressed .

Speakerphone turns off when handset is taken off·hook but

turns on when handset is

placed on-hook.

POSSIBLE CAUSE

(BK) strap to screw terminal 18 on PSB was not insulated and

stored when option was wired

Defective output logic level

Insulat e and s tore strap lead

Replace

REMEDIAL ACTION memory

Defective circuit of D·180493

Kit of Parts

Noise on line

Static discharKe damage

Replace dial tone detector PWB assembly of D · 180493 Kit of

Parts

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.

1. Consult Telco Engineer for

proper grounding procedure

2. Replace memory iii

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Key features

Automatic dialing of 31 frequently called numbers
LAST NUMBER DIALED scratch pad memory
Modular key telephone set
Integrated circuit memory
Common audible ringing
Speakerphone
Dial tone detector
One-Touch Calling
Record Disable
Dial Intermix

Frequently asked questions

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.

Depress the RECORD button. Depress the specific memory button adjacent to the desired telephone number listed on the directory sheet. Manually dial the desired telephone number. Depress the RECORD OFF button if less than 15 digits are recorded.

Depress the RECORD button. Depress the memory button corresponding to the name and number to be deleted. Depress the RECORD OFF button.

872A 1M TELEPHONE SET

(TOUCH-A-MA TIC ® SET)

general

872A1M

set

converted (Table

scratch

Design Features:

•

• Plug-in battery

• Capability to pause for subsequent dial tones during automatic dialing (WAIT input).

•

Last number

manually dialed memory

Optional Features (Refer to Table

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

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

All options are implemented by:

Ordering Guide:

Ordered Separately:

Note: A 95B-type power unit is required

Optional Apparatus (order

required):

Note:

Note:

Operating Features (Fig. 2).

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:

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

loosened retainer clamp or metallic outlet cover making contact with the ac prongs of the power unit when partially

•

•

•

Note:

•

•

•

Note:

Note:

•

•

•

Note:

Other optional components

be

such

loudspeaker sets, etc. Refer to the appropriate section for connection information for these components.

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