Maintenance; Dial Restriction - Bell System Practices QSK100AX Manual

SECTION 502-321-910CA
(f)
Slide the grommet into the square hole
in the end of the handset housing with
the retaining clip facing the instrument section
of the handset. Fully seat the grommet so that
the clip will engage. The. grommet shoulder
should be flush with the surface of the housing.
(g) Insert a station number card and retainer
window into the well on the handset.
Fig. 8
4.06 If unable to dial after completing installa-
tion check line polarity as Touch-Tone
Dial will only function when polarity is correct.
4.07 DIAL RESTRICTION
QSK100AX Telephone Set
(a) Connect IN4384 diode between GN and OR
terminals of the handset.
(b) Assume negative battery is on ring and
ground is on tip of dialing circuit. With the
arrow on diode pointing toward OR terminal,
all lines will be restricted. Reverse tip and ring
of line, or lines, on which dialing is required.
This will remove shunt from across pulsing
contacts on these lines.
(c) With arrow on diode pointed toward GN
terminal, no line will be restricted. Reverse
tip and ring of line, or lines, on which dialing
is to be restricted. This will shunt pulsing con-
tacts on these lines.
Page 10
5. MAINTENANCE
5.01
Normal maintenance will involve replace-
ment of the following parts. (See Para.
3.03 for identification of parts.)
• DIAL (QSK100AX Only)
• CORDS
• TRANSMITTER
• RECEIVER
• FEET
• SWITCHHOOK (See Caution Note)
• TRANSMITTER CUP (QSK100AX only)
• ASSEMBLY DIAL (includes Transmitter
cup) (QSK2100AX Only)
Caution: Hookswitches and Recall switches
in Contempra telephones must not be burn-'
ished, as this destroys the gold plating. Use
bond paper or contact spray.
If
these
methods fail, replace telephone set.
Dial Maintenance consists only of
determining if the dial is defective.
Do not attempt adjustments of the
dial in the field.
5.02
To replace Rotary Dial:
• See Para. 4.02 for i:n.structions on opening
of handset.
• Remove dial leads from
terminal~
located
on transmitter cup.
• Remove 4 mounting screws.
• Replace dial.
• See Para. 4.05 for instructions on reassem-
bly of handset.
5.03
To replace dial assembly (Touch-Tone).
• See Para. 4.02 for opening of handset.
• Disconnect handset cord and receiver leads.
• Remove 1 screw from each side of trans-
mitter cup.
• The dial and transmitter cup assenibly may:
then be replaced.
• Replace receiver leads and handset cord
wiring.