Bell System Practices 2563HB Assembly instructions

~~T~S:=A11VANCE PRINTING
SERVICE
2563HB TELEPHONE SET
SECTION 502-543-400
Issue 2, December 1972
1. GENERAL
1.01 This section provides maintenance and
connection information for the 2563HB
telephone
set equipped with headset jacks and
12-button TOUCH·TONE® dial for use with optional
12-button headset.
1.02 This section is reissued to:
•Include KS·20419L1 buzzer, Fig. 1
•Show
T1A ringer as replacement for NIA
ringer, Fig. -1
•Show 35Y3A dial as replacement for 35A3A
dial.
2. MAINTENANCE
Replaceable Components
2.01 Field replaceable items are listed under
identification in the appropriate Refe~ence
section in Division 502.
2.02 Maintenance of handsets and ringers is
outlined in sections covering these components.
UxJse Card Retainers
2.03 The P-25E803 and P·269561 are nonadjustable
card
retainers. The P-25E785 (MD) card
retainer
is replaced by P-25E803.
~.04 If P-25E785 (MD) card retainer becomes so
loose
on the faceplate that the number card
or designation strip slips, they can be tightened
as follows:
(1) Remove faceplate from set.
(2) Remove card retainer from faceplate.
(3) Bend the four arms of the retainer so that
mQre pressure will be apPlied to the number
card and designation strip. The bends should
be made approximately 1I2·inch
in from the tabs
on
the ends of the arms and in the opposite
direction from the factory bent tabs.
(4) Install the card retainer on the faceplate
and insert the number card and designation
strip.
(5) Install faceplate on telephone set.
Note: If adjusting the arms of the retainer
does not
result in sufficient holding power,
replace the card retainer.
Removing and Replacing Housing
2.05 Sets without exclusion:
(a) To remove housing, loosen captive screws
in base of set. Lift housing up and toward
front of set.
(b) To replace housing, guide lower front of
housing over pushbuttons, align housing with
base of set, and gently press housing into place.
Tighten captive screws
in base of set.
2.06 Sets with exclusion:
(a) To remove housing, pull up exclusion plunger
to its operated position, loosen captive screws
in base of set, and lift housing up and toward
the front of set.
(b) To replace housing, guide lower front portion
of housing over pushbuttons, align housing
with base
of set, and gently press housing in
place.
(c) Depress exclusion plunger. With slight
pressure it should snap into its unoperated
position.
(d) Operate exclusion plunger several times to
insure proper operation. Tighten captive
screws
in base of set.
@) America~ Telephone and Tfllegraph Company, 1972
Printed in U.S,A.
Page 1

SECTION 502-543-400
Exclusion Switch
2.07 Perform no field maintenance on exclusion
switch and plunger other than cleaning
contacts with a 265C tool.
2.08 Replace
set or exclusion switch assembly if
any of the following exclusion switch
requirements cannot be met:
(a)
Exclusion plunger should remain in the
operated position when pulled up to the full
extent
of its stroke.
(b)
The plunger should return to the fully
depressed po~ition when handset is replaced.
(c) With housing removed, normally closed
contacts of the exclusion switch should have
perceptible follow when operated manually.
(d) With housing removed, open contacts of the
exclusion switch should have minimum
separation of 1/64-inch; gauge by eye.
Mounting Cords
2.09 Cords, designed for use with 636A key
assemblies, feature slotted wafer sections
for each line appearance. This allows easy
rearrangement of lines to pickup buttons.
fr
No field maintenance should be
1 performed on the plug of plug-ended
mounting cords.
Lamps and Pushbuttons
2.10 Replace cracked pushbuttons or collars.
Remove accumulated dirt or film from lamps,
collars, and pushbuttons with a
water dampened
cloth.
DO NOT USE SOL VENTS OF ANY
KIND. If cleaning does not correct binding of
pushbuttons, replace button and collar assembly.
2.11 To replace defective lamp:
(1) Lift lamp from socket with KS-6320 orange
stick
(2) Align lamp contact surfaces when placing
new lamp
in socket
Page 2
2.12 The button and collar assembly should be
carefully aligned to avoid interference with
removal
or replacement of housing.
Keys~6-Type
2.13 Field maintenance of these keys consist of
cleaning contacts with a 265C tool or adjusting
with a
363 tool.
2.14 Contact follow and separation is obtained
by using a
363 tool at apoint adjacent to
contact spring pile-up. When adjusting springs:
(a) There should be aminimum spring clearance
of 1/64-inch between contact springs and
those
parts of the key which .do not make contact
with springs.
(b) Normally open contacts should make with
perceptible follow on locking keys before key
plunger assumes locked position.
2.15 Replace
set if the following requirements
cannot be met:
(a) When depressed locking plunger should, on
its downstroke, release any previously locked
plunger.
(b) When any pushbutton plunger is released
from its operated position, it should return
with asnap to its nonoperated position.
(c) An operated key plunger should not release
during downstroke of hold button.
(d) An operated key plunger should release from
its operated position
on the upstroke of the
hold button.
241A Amplifier
2.16 Used in telephone sets with headset jacks
to amplify the output of the headset
transmitter. NO FIELD MAINTENANCESHOULD
BE ATTEMPTED ON 241A AMPLIFIER.
2.17 Replace a241A amplifier if it is suspected
of being defective (as evidenced by poor or
no transmission).

TOUCH-TONE Dial
2.18 Oheck line polarity if no tones are heard in
the receiver when a button is depressed.
ft
The 3IJ-t
ype
. disl will function only
when the green disl lesd is positive
(+) and when the orange-blsck lesd
is n6/lstive (-).
2.19 A dial hand test set connected to line
terminations can be used to test for defective
dials.
ft
Do not stt6mptrepsirofTOUCH-TONE
disls in the field Rep/sce defective
dials.
HandlJets
2.20 When special conditions exist the G1AR or
G3AR may be replaced by the following:
_G6AR (MD) or G6B handset for impaired
hearing
_ G7 AR handset for weak speech
_G8A
or G8B handset for noisy locations
3. CONNECTIONS
3.01 These sets are factory-wired for use with
1A1 or 1A2 key telephone system line circuits;
155 2, SECTION 502-543-400
they can be modified for use with 1A key telephone
systems as shown in Fig. 3. The sets are equipped
with a241-type amplifier providing headset operation.
A
52- or 53-type headset must be ordered separately.
3.02 The optional kits
of parts providing polarity
guard for end-to-end signaling service and
station busy lamp features are not adaptable to
the present design of 2563HB telephone set. Station
busy lamp indication, showing only that the handset
is off-hook
or that the headset key is in the ON
position, can be provided
for 1A1 or 1A2 KTS by
use of aKS-15724L1 diode which must be ordered
separately and connected as shown in Fig. 2. This
connection will not indicate that aline pickup
pushbutton is depressed. Station busy for 1A KTS
is awiring option shown in Fig.
3.
3.03 The I hold feature of SD-69530-01 can be
incorporated with
these sets when used with
1A1
or 1A2 KTS. Telephone set wiring changes
are shown in Fig. 2 and key system component
requirements are shown in SD-69530-01.
3.04 Line exclusion
feature can be provided by
installation of aD-179935 Kit of Parts (ordered
separately). Connect
as shown in Table A.
3.05 The set ringer may be connected as abridged
ringer on any line if desired (Note 4, Fig. 1)
3.06 .The 2563HB telephone set is factory-equipped
with aKS-20419L1
(10 volt AC only) buzzer .•
Pag_ 3

II
II
It
II
it
*
II
II
II
II
II
ON
OH
00
0
ER
0
EH
0
EB
t
HS
(BR)
HS
FL
14
(R)
(G-BK)
9
\NOTES 2,4,5, AND 6)
PU
636A KEV
IR
06
(BL-W)
PART or 050N
MTG CORD
: iw-~;
LI
~
43
(BL-R)
L2
LS
;(R-BL)
~
IB
(V)
(BR)
atb' C
N
:(BR-R )
~
(R-BR)
(O-BK)
L4
(V)
(O-BK )
:(BK-O)
~
H
/' (V-BL)
n
(S-BK)
L5
:(RK-S)
~
(V-BL)
~
(BL-V)
(G-V)
6 (BL)
+EXCLUSI
:(V-G)
~ KS-20419LI
TO
(BL-W)
AC BUZZER
TABLE A(W-O)
S\iITC~
04
(V-D)
+
)O-W)
PU
(O-W)
'.
~O)
..... IH ,
to!
EXCLUDED
(O-V)
+
(S-W)
'<.I
"rSTATION
(
II
/
I:
(NOTE I)
PART or os
#Sl
~2H
(V-BR)
CLI P NO.
I4TG CORD
"-'
«G-R)
41
46 ( (V-BLl
II
(S-R)
AR-G)
r>. C3H
"(BR) R
42
, 21 (IBl-V)
,
"-'
/
«BL-BK )
IA-H
43 47 (
(V-O)
II
«BK-BL)
~ 4H
44
.....
B22 ((O-V)
....,
'"
X
«BR-BK) _ II
BZ
34
17 (IO-
Y)
)BK-BR) ~6H
(BR-BK)
BZI
33 ,42 (
IY-O)
....,
31
AV-s)
_RT
(BK)
41 «Y-BLl
~S-Y)
"-'RR
(S)
1A47 49 (
(V-BR)
0
SP
48
,24 (tBR-V)
06
~
SPARE
32
.....
«BR-V~G
TIA ~
16 «Bl-Y)
<2'K RINGER
45
48 ( (v-G)
"
4-!-BR)
50
25 ( IS-V)
0149 50 (
IV-S)
46
.....
23 (IG-V)
.....
.....
r>.
. .
(W-BL)
~
'"
....,
I
.-
...
_IT
(BR-W)
~
_ 2R
(S-V)
... (W-DR)
'<.I
_2T
(O-R)
"-'
~ (G)
LS
(W)
~3R
3I
....
( (R-O)
,..3T
de
-v.J
/
(S-R)
~4R
(R-S)
.... 4T
(0X
(G-BK)
_ 5R
(BK-G)
:5T
"
, (G)
LI
(6)
43
18
40
5
30
8
33
3
28
6
31
9
34
12
37
15
II
36
14
39
45
20
9
4
2
27
26
4
29
7
32
10
35
13
38
(NOTE I)
CLIP NO.
R (I )2
T (I )I
R(2)
8~
T(2)
7
R(3)
14
,
T(3)
13
R(4)
20
.....
T (4)
19
R(5)
26 ,
-.....
T (5)
25
.....
L (I )6
LG(
I)
5
-.....
L(2) 12
,
LG(2)
II
,
L(3) 18
-<
LS(3 ) 17
,
L (4)
24
LG(4 )23 /
L (5)
30
LG(5)
29 ,
"-
["
36
BZI 35 ,
AI-B
4
A-H 3
B
10
,
A-H 9
B
16
A-H-S-SI 15
B22
A-H-S-SI 21
, I
B28
A-H-S-SI
~
B-BI
39
R-RI 40
.....
)38
IG
G-SG
RD
SV
BL
37
MP
BUZZER
LEADS
BU
LA
T'
5
G
IA'-1A2
KTS A
LEAD
tONNS
1 A'-'A2
KTS LINE
CONNS
IAI-IA2
KTS LAMP
COHNS
SECTION 502-543-400
Fig. l----i2563HB Telephone Set, Connections (Sheet 1 of 2>.
Page 4

-----------------;;.55 2, SECTION 502-543-400
,----------,
(O-BKI
PART QF 35Y3A DIAL I
(Rl
(STRAPI
,§
J
(BLI
!:I (Rl
Tt
(RI
Bt
xwe y
(S-BKI (51 7
(BKI
67
5
(S-Vl
48
(V-GI
58 (W .. BRI
G3AR
HANDS£T
TRMTR
IBK-Sl
(R-GI
Rt (W-GI
(STRAPI
B(G-Vi B
(WI
RCVR
(BICI
st (WI
52-OR
53-TYPE
HEADSET
TRMTR
~ LW
v
d(.,R)
o0
3§ 18K)
o ·
(BLI (STRAP)
IRI
(V-Gl
LS
!lW-BL)
I
I
I
I
L ..J
(G)
RRt (8K)
GHt (WI
RCYR
2
6
o
3
1------+-0
4
425K NETWORK
..-- ~R
RR 8
241A AMPliFIER, SERIES II.
(NOTE 91
C
0
L2
0
L1
0F
l=:!~~~~c::::~6N
06
0T
05
NOTES:
I. 66E-TYPE CONNECTING BLOCK SHOWN. MOUNTING C~D NAY BE PLUGGED DIRECT~Y 'NTO
CONNECTOR CABLE. CORD AND PIN NUMBERS FOR CONNECTOR CABLE ARE ·SAME AS
MOUNTING CORD.
2. CQNNECTIONS FOR TIA RINGER SHOWN. CONNECTIONS FOR NIA RINGER IDENTICAL EXCEPT INSU~TE
AND STORE (S) AND IS-RI LEADS.
3. 'F EXCLUSION FEATURE IS AOOED, CONNECT SWITCH LEADS PER TABLE A.
4. FOR BRIDGED RINGER ON ANY LINE CONNECT (R) RINGER LEAD TO II or NETWORK ANQ
(BK) RI~ER LEAD TO TIP or LINE INVOLVED. CONNECT (S) STRAP FRON AOf
N£TWORK TO RING Of LINE INVOLVED.
S. IF CAPACITOR IS NOT REQUIRED IN RINGER CIRCUIT, NOVE (R) RINGER LEAD TO A OF
T HE NETWORK.
6. TO SILENCE RINGER PERMANENTLY CONNECT (R) AND (BK) RINGER LEADS TO K OF T"E
NET\IORK.
7. LINE SWITCH SEQUENCE, HANDSET REMOVED:
b-c MAKES
d-e MAKES
f-g BREAKS
8. 644A KEY SEQUENCE:
3 AND 4 MAKE FIRST
I AND 2 HAKE SECOND
9. SET MUST BE EQUIPPED WITH A 241A SERIES II AMPlIFIER IF EXCLUSION FEATURE IS
AOOED.
10. IF HOLD POSITION LAMP IS REQUIRED, USE SPARE LEADS AND SPARE TERMINALS OR
0-161488 CONNECTORS.
*- INSULATED AND STORED
t· NETWORK TERMINAL-UNOESIGNATED TERMINALS ARE ON KEV TERMINAL BOARD.
§ - 241A AMPLIFIER TERMINAL
PU- PICKUP KEY .
H- HOLD KEY
LS- LI NE Sill TCH
HS- HEADSET ON~OFF KEY (644A)
FL- FLASH KEV (644A)
Fig_ l-t2563HB te.ephone s.t, Connections (Sheet 2of 2>.
Page 5

SECTION 502-543-400
(G- BKI HS (BR)*
'(" (0-" I,,, t: ,B.,* ,
IB LS
®
<
®I®
~
N
H
A. WITHOUT I; HOLD
(G-BK) HS (BRa
44 (BL (Y-BRI ,
LS
c
a
04
(BRIt
~ .
3_
(S-Y)
FL (Rl* NH
(GI
M~KI*
LS*
HS
(WI
(S-RI
9o.-.!!l*
.1
ct
\ (BRIt HS (G-BKlt
®1
B
(O-WI
IB ®®
(Ylt b
-
0
" G OR SG
(BR-Y)
SG
,
®
2
19
44 ( ,-- •. no *
6
®
®
AI
(O-WI (Y) .t
(BR) *I
"
IB
LS
/
,BL (Y-BR)
SP (BR-V)*
4
"®
(o-BKI*
®
M"" ADD STRAP
~
I (Ylt
®
2
44
24
B. WITH rHOLD
H-HOLD KEY
HS-HEADSET ON-OFF KEY
LS -LINE SWITCH
® - WITHOUT BUSY LAMP
0- WITH BUSY LAMp, USE KS-15724, LI DIODE
* -LEADS INVOLVED IN MODIFICATION
NOTE;
ALL TERMINALS ARE ON KEY TERMINAL BOARD.
H- HOLD KEY
FL-FLASH KEY
HS-HEADSET ON-OFF KEY
LS -LINE SWITCH
®-WITHOUT BUSY LAMP
0- WITH BUSY LAMP
t - NETWORK TERMINAL UNDESIGNATED TERMINALS
ARE ON KEY TERMINAL BOARD.
*-LEADS INVOLVED IN MODIFICATION
Fig. 2-2563HB Telephone Set-1 A1 or 1 A2 Key
Telephone System, IHold and/or Station
Busy Lamp Modifications
Fig. 3-2563HB Telephone Set Converted for 1A Key
Telephone System, With
or Without Station
Busy Lamp
Page 6

ISS 2, SECTION 502~543-400
TABLE A
CONNECTIONS
FOR LINE EXCLUSION KEY
EXCLUSION KEY LEADS
EXCLUSION
KEY TEL SYS
BL.W W-BL
O.W
W.O
V-BL BL.V
V-O
O-V
IA
R*
T*
IBt
H*
ET
ER EH
EB
On
any line
IAI or IA2
R*
T* EB
H*
ET
ER EH
EB
*Connect to terminal of line being excluded.
tWhen other than Line Iis excluded in a lA key telephone system, remove the O-W mounting cord
conductor from terminal IB, insulate and store. Connect balance lead cord conductor of line in-
volved to
terminal IE.
Note: To allow access to and operation of the exclusion switch plunger during headset operation,
handset must be lifted and left off of its cradle. Returning handset to on-hook position cancels
exclusion.
TABLE B
PICKUP·SIGNAL
KEY CONVERSION
CONVERTIBLE
KEY LEADS
KEY
OPTIONS
Y-IR
IR
S.R
BR.BK
HPPPPP
MMMX
HPPPPS
MMMSG
HPPPSS
MMSG
.X
HPPSSS
MXSG X
HPPP*P*S*
MX5H
Nt
HPP':'P*P':'S* XX5H
Nt
,> These pickup ke~' options use line switch or headset switch controlle'd ground through the' common signal
key and the Slead of the selected line to operate acommon signal rela.l".
t1"01' lA KTS connect to terminal 1. Obtain common signal ground through (Y) line switch lead or (G-BKl
headset key connected to
SG terminal.
Note 1: All convertible key positions are arranged in the factory as pickup positions. To convert
a key position from pickup (locking) to signaling (nonlocking), remove the P-12A892
screw detail from plunger at the key position to be converted. Make necessary connection
changes as shown in Table B. To convert a key position from nonlocking to locking, in-
sert P-12A892 screw detail.
2: When keys are converted for signaling, the S lead of key involved provides the signal cir-
cuit and SG lead provides the common signal ground.
Page 7
7
Page.