AT&T Bell System Plant Series Service Manual

BELL SYSTEM PRACTICES
Plant Series
SECTION 502-542-400
Issue 1, July 1970
AT&TCo Standard
SERVICE
1563HB TELEPHONE SET
1. GENERAL
1.01
This section provides maintenance and
connection information for the 1563HB (MD)
telephone set equipped with headset jacks and
10-button TOUCH-TONE® dial for use with optional
operators headset. Connection information was
formerly found in Section 502-525-423 which will
be canceled.
2. MAINTENANCl
Replaceable Compqnents
2.01
Field repla,ceable items are listed under
identificatiQn in the appropriate Reference
section in Division 502.
2.02
Maintenan~e of handsets and ringers is
outlined in srctions covering these components.
Loose Card Retainers
2.03
The P-25E803 and P-269561 are nonadjustable
card retaiqers. The P-25E785
(MD)
card
retainer is replaced by P-25E803.
2.04
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
more pressure will be applied to the number
card and designation strip. The bends should
be made approximately 1/2-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:
(1) To remove housing, loosen captive screws
in base of set. Lift housing up and toward
front of set.
(2) 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:
(1)
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.
(2) To replace housing, guide lower front portion
of housing over pushbuttons, align housing
with base of set, and gently press housing in
place.
(3) Depress exclusion plunger. With slight
pressure it should snap into its unoperated
position.
(4) Operate exclusion plunger several times to
insure proper operation. Tighten captive
screws in base of set.
Exclusion Switch
2.07
Perform no field maintenance on exclusion
switch and plunger other than cleaning
contacts with a 265C tool.
@
American Telephone and Telegraph Company, 1970
Printed in C.S.A.
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