SECTION 502-303-1 01
LEAD
NO.
426N
DIODE
Fig. 12-Typical Installation of 426N Diode in Both
AC1 and AD1 Bases
ft
On
2-party tip stations requiring ground
identification, be sure that the jacks
and plugs are installed in accordance
with the section on jacks and plugs.
4.. OPERATION
4.01
Instruct the customer on the necessary
operating features.
4.02
Recall Switch (Fig. 1).
Point out recall
switch and explain advantages of switch.
Example: If a person receives busy tone at
conclusion of dialing a number, he may depress
the recall switch for a few seconds; then release.
Dial tone will again be heard. This is done in
place of depressing line switch plunger on the
telephone base.
Caution: If the recall switch is depressed
during conversation or dialing, central
office equipment may be disconnected.
4.03
"F loating" Finger S t o p 220A o nly:
Demonstrate moveable finger stop by dialing
a digit. Then depess recall switch.
Page 8
Note:
When demonstrating finger stop, be
guided by local instructions in choosing digits
to dial. Some digits (i.e., 1 or 9) may be
used as special access numbers for services
such as DDD in ANI offices.
4.04
To prevent dialing errors, every digit dialed
requires rotation of fingerwheel until finger
is stopped by the moveable finger stop (220A only).
4.05
Demonstrate the ringer volume control.
Caution the customer about ringer cutoff if
the screw is removed to provide this feature.
5.
MAINTENANCE
5.01
Maintenance of the ACl and ADl telephone
bases is limited to ringer bias adjustment,
burnishing or adjusting contacts, and replacement
of defective components as listed in 2.05.
5.02
For adjustments and ringer cutoff feature
of the PIA ringer, refer to the appropriate
ringer section in Division 501.
5.03
In areas where RF suppression is required,
replace the hand telephone set with a set
that has been modified by the local distributing
house. Modified sets will not be stamped
"RF
Suppressed See Section 500-15(].100".
Stamp is
located adjacent to handset cord jack where the
set code is stamped.
5.04
Field maintenance of the hand telephone
sets is limited to the following:
•
Dial lamp
•
P-25E803 number card retainer
•
P-28E320 light seal
•
Form E-5002A number card
•
Handset cords
•
P-82E800 cover
5.05
To replace a dial lamp in the TRIMLINE
hand telephone set, remove cover or number
card retainer, and light-seal plate. Current
production hand telephone sets have the lamp in a
horizontal position, and a KS-6320 orange stick can
be used to remove the lamp (Fig. 13).
Exercise
BSP 502-3
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1972
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08.jps Scanned by Frank Harrell, (Cowboy Fra11k) Castle Rock, Colorado Jan 31, 2012 21:59:48
