Northern Telecom IMAGINATION QSK450 Operating and installation instructions

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OCR = Yes
Northern Telecom Limited
Product : Imagination Series Telephone Set -
Alexander Graham Plane.
Type: 450
Northern Telecom Practices : 502-9031-200
Issue Date : May 30th, 1978.
Purpose : Description, Installation, and Maintenance
©Jeff Lamb

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NORTHERNTELECOMPRACTICES SECTION502-9031-200
Issued: 30 May 1978
Standard
IMAGINATION*TELEPHONESET
(ALEXANDERGRAHAMPLANE)
450-TYPE
DESCRIPTION,INSTALLATIONANDMAINTENANCE
Fig. 1 -450-Type
1. GENERAL
1.01 This section provides description, installa-
tion and maintenance information for the
following sets:
• QSK450 G
• QSQM450
1.02 These sets are similar except that the
QSK450-type set is equipped with a three
conductor, round, spade-tip-ended mounting
cord. The QSQM450-type set is equipped with a
four conductor, flat, plug-ended mounting cord.
•Trademark of Northern Telecom Limited
8 Not Required by Bell Canada
1.03 The QSK450-type set is factory wired for
ring party service and the QSQM450-type
set for individual or bridged service.
1.04 The 450-type telephone set is available in a
two-tone color combination. For the colors
of the major components refer to Table A.
©Jeff Lamb
©NorthernTelecomLimited.1978
Printed inCanada 1121

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SECTION.502-9031-200
TABLEA
BASE• HOUSING FINGER HANDSETHANDSETMOUNTINGQSK4S0A QSQM4S0A
WHEEL CORD CORD
Note:For color codes, refer to 500-1201-100.
1.05 The 450-type telephone set is shaped similar
to an airplane; approximately 9-1/2 inches
(241 mm) long, 8 inches (203 mm) wide and
6-1/2 inches (165 mm) -high.This set is available
only with a rotary dial. The handset rests off
center to the rear of the set. The ringer volume
control is on bottom of the set.
2. MAINTENANCE
2.01 Maintenance of customer-owned apparatus
is the responsibility of the customer. For
maintenance of company-owned apparatus, field
maintenance should be limited to cleaning. and
adjusting line switch contacts and replacing the
components listed in Table 8.
© Jeff Lamb
1-122-
• •
TABLEB
FIELDREPLACEABLEITEMS
Dial
Handset
Handset Cord
Mounting Cord
Transmitter Unit
Receiver Unit
Ringer
Network
3. INSTALLATION
QDBIUI
QSE5A GJ
NE-H4CJ
NE-D3BNG
or NE-D4QH
NE-Tl
NE-UlorQUUlA
NE-MIA
QNB425El
3.01 Information for the installation of the 450-
type telephone set is contained in Table C,
•Fig·.2, and the following charts. •
~ -. ,-
Chart 1- Substitution of the Ringer
Chart 2 - Substitution of the Dial
Chart 3 - Substitution of the Network
Chart 4.:..Fault Location Guide •
G Not Required by BellCanada.

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SECTIONS02-903t.:200
TABLEC
CONNECTIONSFOR450-TYPESET
TIP
INDIVI- PARTY'
COLOR DUALOR RING TIP 2650 'A'LEAD
BRIDGED •PARTY PARTY IDENT CONTROL
Mounting Ring
Cordat Tip
Connecting Grd
Block** Aux
R R R G G R
G G G R R G
y G y y y y
BK B B" B B B
Mounting Ring
Cordat Tip ·
Network 'Grd.
R L2 L2 SL2 SL2 L2
G LI LI LI LI LI
y G G G (j G
Aux
• BK .. • • * L3
' ,
Ringer BK @a G G G LI
s • • • • • .
S-R • • • B •
R K K K K K
LineSwitch S-BL L3 L3 L3 L3 L3
G L3 L3· L3 L3 G
*Indicatesdead dress. • • •
.. For sets equipped with NE-D3BNof 'NE-D4BJcord only.
QIndicates wiring.difference,sfor se!s·eq':1iP_~edwith NE-D4QHcord.
Notes:
1. For 'A' leadcontrol use NE-D4BJcord.
EJ 2. If the telephone set is the only set on the premises,the ringeroutput maybe increasedby placing
the ringer biasingspring in the high tension notch.
©Jeff Lamb
El Not Required by Bell Cana~a 1123

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SECTION 502-9031-200
MOUNTINGI NE-MIA QOBIUI
CORO I RINGER DtAl
AT NETWORK:
I
I
I
J7
IG) U
GAO
(Yl
0
X
IOOO
I\
(M.)
IG)
I <
LINE
SWITCH
1S-8LJ
IG}
IS-BR)
I b ~---,::IS-"--Yl_-t----,
I •
I ~--=ISJ_--r---t---,
I
QN8425EI
NETWORK
I (Al •
I ~--,------~~------t---------------- ➔ >-'
IWI
1:.c. •
UO LZ I
I
Fig. 2 -SchematicDiagramof 450A-TypeTelephoneSet
TABLED
450-TYPETELEPHONESET
IDENTIFICATIONOFPARTS
IICVR
~
~
TRMTR
(AJ
ITEM PIECEPART DESCRIPTION QSK450A QSQM450A
NO. NUMBER
1 P0251028 Screw 4
2 P0565018 Screw 3
3 P0502646 Screw 2
7 P0297882 Rivet 2
10 P096D326 Foot 3
11 P0565876 Volume Control I
18 P0569400-* Base 1
218 P0565881 • Chassis Assembly 1
258 P0571200-* Housing Assembly 1
298 P0515926 Line Switch Assembly 1
36 QN8425El Network 1
40 QD81Ul-* Dial I
47 NE-MIA Ringer 1
53 QSE5A-* Handset 1
70 NE-D38N-*0 Mounting Cord 1
NE-D4QH-87 Mounting Cord
86D P0535652 Card Holder Group 1
*Refer to Table A for appropriate color
© Jeff Lamb
1124 0 Not Required by BellCanada
4
3
2
2
3
1
I
1
1
1
I
I
I
1
I
1

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0
~ ' ,·
I ' I
-r ~ ~-!~:v" ;
: . ·~
~ -e ,..
•SECTION 502-9031-200
Vl(W $HCMllN(; ASSEMBLY
OF A l,INE CORO , tTt M 70.
FROM THE 80TTOM Of ht(
Fig. 3 - Exploded View of 450-TypeTelephone Set
© Jeff Lamb
i1126

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SECTION502;..9031-200
. . ..
ITEMNO.
1
4
7
9
10
148
158
20
21
26
TABLEE
QSESAHANDSET
JNDENTinCATIONOF PARTS
PIECEPART NO.
P0563499
P0249778
P0565020
P0564900-*
P0563479·
P05648()().•
P0563478
NE-Tl
NE-Ul or QUUIA
NE-H4CJ
; :
.oiscRIPTION
• Screw
Screw(SeeNote)
Transmitter Gasket
Cover
ReceiverCup
Instrument SectionAssy
TransmitterCup Assy•
Transmitter Unit
ReceiverUnit
Cord
*Referto Table A for appropriatecolor
Note: Thisitemshownforinformationonly.
-21.
-I
SECTA-A
Fi,. 4 -CrossSection of QSESAHandset
. ©Jeff Lamb
1128
·9
4
QSESA
2
4
1
1
1
1
1
1
1
1
• j

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STEP PROCEDURE
CHART1
SUBSTITUTIONOFTHERINGER
SECTION502-9031-200
1 Remove the housing by loosening the screws in the base until the screws disengage from
the housing.
2 Disconnect the ringer leads.
3 Loosen the ringer mounting screws until the screws disengage from the chassis.
4 Replace the ringer. See Table C for connections.
STEP PROCEDURE
CHART2
SUBSTITUTIONOFTHEDIAL
1 Remove the housing according to Chart 1, Step 1.
2 Disconnect the dial leads.
3 Remove the dial.
4 Replace the dial. See Table C for connections.
STEP PROCEDURE
CHART3
SUBSTITUTIONOFTHENETWORK
Remove the housing according to Chart 1, Step 1.
Disconnect all leads on the network.
1
2
3 Insert the NS-16750 L3 releaser into the releaser hole of the tab on the network mounting
adaptor.
4
5
Slide and lift the network from the mounting adaptor.
;
Replace _thenetwork. See Table C and Fig. 2 for connections.
©Jeff Lamb
1127

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SECTION502-9031-200
INDICATION
Belldoes not ring
Belltaps while dialing
or operating line
switch
Can't trip ring
No dial tone
©Jeff Lamb
1128
CHART4
FAULTLOCATIONGUIDE
PROBABLECAUSE•
Ringer disconnected or wired
incorrectly
Volume Control Lever in cut-off
position.
Open winding.
_Metalparticles in armature.
Open ringing capacitor.
Incorrect wiring
Loose gong.
Biasing tension too low.
Open handset cord.
Defective network or open wiring.
Contacts on line switch do not
close.
Open mounting or handset cord
Defective receiver unit or short
circuit varistor.
Dial shunt contacts closed
Open network
Line switch contacts do not close
CORRECTIVEMEASURE
Connect according to Table C.
Move control lever and advise
customer of cut off position.
Replace ringer.
Remove with adhesive tape or
equivalent.
Replace network-.
Check mounting cord and ringer
connection
Tighten screw as required. •
Place bias spring in higher tension
notch.
Replace handset cord.
Replace network.
Clean or adjust line contacts.
Replace ·handset cord.
Replace receiver unit.
Replace dial
Replace network
Check switch cover for proper
installation

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INDICATION
.No dial tone
Can't break dial tone
Loud clicks heard in
receiver while dialing
Can't hear
Can't be heard
SECTION502-9031-200
CHA,JtT4
FAULTLOCATIONGUIDE,Con't
PROBABLECAUSE
Line switch contacts do not close
Dial does not pulse
Line reversed at telephone set
Dial shunt contacts do not close
Open or short circuit receiver unit
or handset cord
Open induction coil in network
Line switch contacts do not open
Defective transmitter unit or open
handset cord
CORRECTIVEMEASURE
Clean or adjust line switch
contacts
Replace dial
Check for battery on ri~ger line
Replace dial
Replace receiver unit or handset
cord
Replace network
Check line switch cover for
interference
Replace transrfritter unit or
handset cord
© Jeff Lamb
1129