Bell 502-303-102 Service Manual
BELLSYSTEMPRACTICES SECTION502-303-102
AT&TCo Standard Issue 3, October 1981
220-, 226-, 2220-, AND 2226-TYPE HAND TELEPHONE SETS
IDENTIFICATION, INSTALLATION, CONNECTIONS, AND MAINTENANCE
1. GENERAL
1.01 This section contains information for the 220-,
226-, 2220-, and 2226-type hand telephone sets
(Fig. 1, 2, and 3). :ii
1.02 The reasons for reissuing this section are
listed below. Revision arrows are used to em- ................
phasize the more significant changes.
• Add the 315B amplifier for 226A hand tele- COVER
phone set
• Show the 315A amplifier (MD) for 226A hand D,AL
telephone sets co v ER
• Change Fig. 25 and 26.
2. IDENTIFICATION DIAL
IO-TYPE
2.01 The 220A (MD), 220C, 220AL, 220AM, and
226A rotary dial and 2220B (MD), 2220C, ....
2220BM, and 2226A TOUCH-TONE* dialing hand FINGERSTOP
FLOATING
telephone sets are intended for use with other compo-
nents and apparatus to make up a complete telephone
set. Refer to Table A for identification of associated
apparatus. RECALL
BUTTON
2.02 These handsets are presently used with the
TRIMLINE* telephone, Transaction, Eleva-
tor, Conference, and some DESIGN LINEr decorator
telephones.
....
2.03 They consist primarily of a plastic deck and
shell, a dial, flexible circuit board (network),
handset cord jack, transmitter, and receiver units.
2.04 The 220A (MD) and 2220B handsets are
equipped with jacks which accept the large
*Registered Trademark of American Telephone and Telegraph
Company.
l_rrademark of American Telephone and Telegraph Company.
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A. Page 1
Fig. 1--220-Type Hand Telephone Set
NOTICE
SECTION502-303-102
COVER VOLUME
83A2B DIAL
3t5 -TYPE
AMPLIFIER
CONTROL
RECALL
SWITCH
RECALL SWITCH
NOTE: 226A HANDSET
222013 AND 2220BM SAME, EXCEPT
HANDSETS
ROUND DIAL
BUTTONS.
HAVE
NOTE
HAS ROTARY DIAL.
Fig. 2--2220C Hand Telephone Set Fig. 3--2226A Hand TelephoneSet
(maxi) plug of the H4DB, H5AA, or H5AD handset 2220BM handsets are equipped with a dial
cord. The 220C, 220AL, 220AM, 226A, 2220C, 2220BM, light which requires an external power source (2012A
and 2226A handsets are equipped with jacks and/or (MD) or 2012C transformer) or equivalent 6-volt sup-
adapters which accept the small (mini) plug of the ply. The 220C, 220AL, 226A, 2220C, and 2226A
H4DU (modular)handset cord (Fig. 4). handsets are equipped with light emitting diodes
(LED) for dial illumination. Power to light these
2.05 The 220A (MD), 220AM, 2220B (MD), and dials is supplied by CO battery over the incomingline
Page2
ISS3, SECTION502-303-102
H4DU
HANDSET CORD
Fig.4--H4DU Handset CordInstalled in Hand Telephone
Set
LIGHT
EMITTING
DIODES
and no local power is required. The 220C, 220AL, and _LED)
226A rotary dial handsets are stamped LED at loca-
tion shown in Fig. 5. The LED equipped
TOUCH-TONEt telephone dial handsets can be iden- _:i _::::_:::_ii_:_:_::_::.................:::::'::::_:_:..........................
tified by the square dial buttons.
2.06 The 226A and 2226A handsets contain an am- Fig. 5--220C, 220AL, and 226A Hand Telephone Set
plifier which provides up to 20dB of receiver Identification Stamping (LED)
gain for customer's with impaired hearing or use in
noisy locations.
2.07 When an LED-type hand telephone set is pro-
• Set, Telephone, Hand, 220AL-$
vided, instruct the customer that during the
time a TOUCH-TONE telephone dial button is de- • Set, Telephone, Hand, 220AM-$
pressed the dial light will be extinguished_and with • Set, Telephone, Hand, 226A-$ (for persons
the rotary-type dia light will flicker during the run
down operation of the dial.
2.08 For tip party with identifying ground when
the LED-type hand telephone sets are provid-
ed, it will be necessary to open the handset and make • Set, Telephone, Hand, 2220BM-$
connections as indicated in paragraphs 3.04 and 3.05.
Ordering Guide • Set, Telephone, Hand, 2226A-_ (for persons
2.09 Basic Handsets:
__ with impaired hearing or noisy location)
• @Set, Telephone, Hand, 2220C-$ (includes po-
larity guard)*
with impaired hearing or noisy location)
• @Set, Telephone, Hand, 2220BMG-_ (includes
• Set, Telephone, Hand, 220C-$ polarity guard)_
Refer to Table B for color suffix. 2.10 Replaceable Components:
Page 3
SECTION 502-303-102
TABLE A
IDENTIFICATION OF "TRIMLINE" TELEPHONE COMPONENTS AND ASSOCIATED APPARATUS (Note 1)
WALLJACK HANDSET HAND TEL METHOD
HAND TEL METHOD TEL BASE CORD CORD ADAPTER ADAPTER TIP PARTY
SET CODE OF IDENT. CODE CODE CODE CODE CODE IDENT. GRD
OR MTG HANDSET JACK SET JACK OF PROVIDING
, , , ,
BASE
AC1, ACIP 630A (ACIP)
220A Cord Jack Cord
or With Code AD2 D4BU
2220B Stenciled
LargeHandset AD1 DSAL H4DB None None H5AA
Insideon Shell AC2, AC2P 630A (AC2P) None
AD2, AD3 D4BU
H4DU 231B (AD2) 227D Note 3
AC1, ACIP 630A (ACIP)
220AM 227D Adapter H4DU 231B 227Dt Note4
or AD2 D4BU
2220BM Jackof a 220A
inHandset
2220Bor
AD1 DSAL
AC2, AC2P 630A (AC2P) None
AD2, AD3 D4BU
H4DU None 227DJ" Note 3
AC1, ACIP 630A (ACIP)
LED Printed ADI D5AL
220AL stop.227D AD2 D4BU Kit
Under Finger- H4DU 231B D-180824
Adapterin 227D* of
HandsetJack AC2, AC2P 630A (AC2P) Parts
AD2, AD3 D4BU
H4DU 231B (AD2)
ACt, ACIP 630A (ACIP)
_4) Wire
rings in AD1 D5AL
Handset Jack. H4DU 231B
2220C Buttons None
(Early (2220C) _ "AC2, AC2P 630A (AC2P)
Version) tMinimodular)
220C, 226A, under Finger-
2220C(Late stop (220Cand AD1 D5AL
Version) 226A) Square H4DU 231B
ot
2226A Dial ( 2220C None
Square AD2 D4BU
AD2, AD3 D4BU Kit
LED Printed AC1, AC1P 630A (ACIP) Parts
H4DU 231B (AD2) D-180825
Note 2
Buttons on AD2 D4BU
nd 2226A) . AC2, AC2P 630A (AC2P)
inimodular} H4DU 231A (AD2)
AD2, AD3 D4BU
Note 1. All components and apparatus are ordered separately.
Note 2. The 2220C (early verions) do not require the 282B adapter.
Note 3. This combination of components can not be wired for tip party identification.
Note 4. 227D and 231B adapters must be removed for tip party identification and HSAA handset cord provided.
* Factory Installed.
t Field or service center installed.
of
Page 4
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Page 5
SECTION502-303-102
• Lamp, 51B or 53B (use 53A for replacement) • Illuminated dial
• Cover, Dial (Fig 1 and Table B) • Plug-ended handset cord
• Cover (Fig. 1, 3 and Table B) • Equipped with a recall switch to make re-
• 812362382 (P-23F238) Light Seal Plate (220A peated calls without hanging up handset
[MD], 220AM, 2220B [MD], and 2220BM only)
• Deck (220C and 2220C), Table B $2220BMG,4 and 2226A only).
• Shell (220C and 2220C), Table B 3. INSTALLATION
• Polarity Guard (factory provided, 2220C,
• SAmplifier, 315A (MD) (226A only)_l 3.01 The plastic deck and shell of these handsets
• Amplifier, 315B $(226A and 2226A only)_l the cover above the dial (Fig. 6). If necessary to open
• Unit, Transmitter, T1 §
• Unit, Receiver, LB-Type § (Shell).
• Adapter, 227D-29 (220AL, 220AM, and Caution: Be careful not to insert tip of
2220BM only), the releaser too deep or mar the handset
2.11 Optional Apparatus (ordered separate- housing. Under no circumstances should
ly): a screwdriver be used.
• D-180719 Kit of Parts (220C, 226A, 2220C, and (1) Use a KS-21107L1 tool or equivalent to remove
2226A only) provides inductive hearing aid the cover located above the dial.
pickup
• iD-180984_l Kit of Parts (2220B (MD) and with a 3/16-inch blade screwdriver.
2220BM only) polarity guard, install in asso-
ciated hand telephone set when indicated on (3) Remove handset cover (shell).
service order
. D-180824 Kit of Parts (220AL only) tip party quired, the chassis can be removed from the
identification desk on the 220C, 226A, 2220C, and 2226A
• D-180825 Kit of Parts (220C, 226A, 2220C, and (Fig. 7).
2226A only) tip party identification
• D-180891 Kit of Parts (2220C and 2226A only) Cover.
Radio Frequency Interference (RFI) only if
RFI is received when hand telephone set is (1) Hook the opening in the cover (shell)under the
on-hook. Refer to Section 500-150-100 for
additional information on RFI. jack).
2.12 Design Fea tures:
• Dial located in handset (rotary or TOUCH-
TONE telephone dial) (3) Tighten the two captive screws.
are held together by two screws located under
hand telephone set, refer to paragraphs 3.02 and 3.03.
3.02 Removal of Hand Telephone Set Cover
(2) Carefully back out the two exposed screws
Note: If the D-180719 Kit of Parts is re-
handsets by removing four (4) mounting screws
3.03 Replacement of Hand Telephone Set
lip of the deck (located below the handset cord
(2) Gently push the shell and deck together.
§ 220C,226A,2220C,and 2226Aonly. (4) Replace cover above dial.
Page 6
HOUSING
SCRE
ISS 3, SECTION502-303-102
MOUNTING SCREW
HOLES(4.)
SCREWS(4)
_1 MOUNTING
Fig. 7--2220C Hand TelephoneSetWith ChassisAssem-
bly Removedfrom Deck
A. Tip Party Identification (D-Kits of Parts)
D-180824 (220AL)
3.04 If tip party identification is required, install
a D-180824 Kit of Parts in the 220AL hand
telephone set as follows.
(1) Remove shell from handset, paragraphs 3.01
and 3.02
(2) Remove the existing 227D adapter from the
handset cord jack by grasping adapter on both
sides and pulling outwards.
(3) Install the 227C adapter from the kit of parts
into the handset cord jack (Fig. 8).
(4) Connect the (Y) and (BK) spade-tipped leads
to terminals A and 4, respectively, of the net-
work (Fig. 8).
(5) The 840362776 terminal board, furnished in
the kit, mounts in the associated telephone
base, refer to Section 502-303-101 or 502-322-400
for installation and connection information.
Fig. 6--Location of Housing Screws (6) Replace the handset shell, paragraph 3.03.
Page 7
SECTION502-303-102
227C
ADAPTER
base, refer to Section 502-303-101 or 502-322-400
............iii_i::ii:i_:!i:i__::_:;'_ .................................. for i n stal lat ion a n d con n ection inf orm at i on.
:i_i_ (5) Replace the handset shell, paragraph 3.03.
_ _ ........ TER M1NAL 4
i!:.i_
........
(Y) LEAD
TERMINAL A
Fig. 8--D-180824 Kit of Parts Installed in 220AL Hand
TelephoneSet
D-180825 (220C, 226A, 2220C, and 2226A)
3.05 Install D-180825 Kit of Parts in 220C, 226A,
2226A, and later version 2220C hand telephone
set as follows.
(1) Remove shell from handset, paragraphs 3.01
and 3.02.
(2) Install the 282A (MD) or 282B adapter onto
the existing handset cord jack by positioning
the adapter on the handset cord jack body as
shown in Fig. 9. Slide the adapter into the jack
body until locked into place. When correctly as-
sembled, the two gold wire contact springs of the
adapter will be positioned in the formerly vacant
slots of the jack paralleling the existing gold con-
tact springs (Fig. 9). Fig. 9--D-180825 Kit of Parts Installed in 220C, 226A,
2220C, or 2226A Hand Telephone Set
(3) Connect the (Y) and (BK) spade-tipped leads
of the adapter to terminals A and 4, respec-
tively, of the network. B. D-180891 Kit of Parts (2220C and 2226A only) RFI
Modification (Fig. 10)
Note: The 282-type adapter is not required in
early version 2220C handsets since the handset
cord jacks are equipped with (W) or (Y) and
(BK) spade-tipped leads which should be re-
moved from their stored locations and con-
3.06 To prevent RFI in the on-hook position when
the early version 2220C handset (identified by
four contact springs in the handset cord jack) is pro-
nected to terminals A and B or 4, respectively, vided, install kit of parts as follows.
(4) The 840362776 terminal board, furnished in (1) Remove the shell from handset, paragraphs
the kit, mounts in the associated telephone 3.01 and 3.02.
Page 8
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