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SECTION 502-9011-200
3.02 Schematic
diagram
for the
C!l
QSK420-type
telephone set is shown
in
Fig. 6.
Schematic
diagram for the QSQM420-type set
is
shown in
Fig.
7.
3.03
The ringer volume
control
has a cutoff
position
which
is obstructed by a blocking
screw.
To provide the ringer
cutoff feature,
remove
the ringer
according
to
Chart
4,
and remove
the
blocking
screw
from the bottom of
the ringer.
HANDSFREE CONNECTION
3.04
Connections of
the QUSlA
COMPANION•
Handsfree unit to the telephone
set must be
made within the
set. A 2-conductor
spade-tip-ended
mounting
cord is
required
to make the connection.
Connections
are
to
be
made as follows (see
Fig.
2):
•
connect each
lead,
from one end of the
2-conductor
mounting
cord, to a QCMl 2A
connector;
•
connect
the
(BK) and
(Y)
leads
of
the
handsfree unit mounting
cord to
the same
QCM 12A
connectors;
•
connect
the
(R)
lead of the handsfree unit
mounting cord
to terminal
H
of the
network;
•
connect
the
(G) lead of the
handsfree
unit
mounting
cord to
the QCM 1
SB connector
which
is
connected to terminal
L
1
of the
network.
3.05
For
further
information regarding handsfree
connection, refer
to
S
12-6251-400.
TELEDIALER 32 CONNECTION
3.06
Connections
of
the
QDM2AJ TeleDialer
32
to
the telephone
set
must
be made
within the
set.
3.07 For inpividual or bridged and ring party
service,
proceed
as
follows
(see
Fig. 3[a]):
• disconnect the (R) telephone set mounting
cord lead from
terminal
L2 of the network
and connect to the (R) TeleDialer lead using
a QCM12A
connector;
• connect
the
(Y)
TeleDialer
lead
to
terminal L2 of the network;
•Trademark of
Northern
Telecom
Limited
1060
info@telephonecollectors.org
3.08
•
connect
the
(G)
TeleDialer lead to
the
QCM15B
connector which is
connected to
terminal
L 1
of
the network.
F?r tip party
service,
proceed as follows
(see
Fig.
3lb]):
• disconnect the
(R)
telephone
set
mounting
cord
lead from
terminal
L 1 of the network
and connect to the (R)
TeleDialer lead using
a
QCM
12A connector;
•
connect
the
(Y)
TeleDialer
lead
to
terminal LI of the network;
•
connect
the
(G)
TeleDialer lead to terminal H
of the
network.
3.09
For
further information
regarding
TeleDialer
connections,
refer to
512-1311-200.
4.
MAINTENANCE
4.01
Maintenance of customer owned
apparatus is
the responsibility of
the
customer.
For
maintenance of company owned
apparatus,
field
maintenance should
be limited to adjusting
and
cleaning the
line
switch contacts
and replacing those
components listed
in Table
D.
4.02
For maintenance information concerning
dials, ringers, etc.,
see
the
appropriate
section.
4.03
Assembly of parts information is shown in
Fig. 8
and parts identification
is
listed
in
Table F.
TABLED
FIELD
REPLACEABLE COMPONENTS
PART NO.
NE-D4QH-87
or
NE-D3BN •
C!l
NE-H4CJ •
NE-6QD
NE-MIA
QNB3A6
NE-Ul or QUUJA
NE-Tl
ITEM
Mounting Cord
Handset Cord
Dial
Ringer
Network
Receiver Unit
Transmitter Unit
• Add
the
appropriate
color
code
(i.e., NE-
H4CJ-35, chameleon
gray handset cord).
El
Not required
by
Bell
Canada
©
Jeff
Lamb
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