AT&T Bell System Plant Series Service Manual

BELL SYSTEM PRACTICES
Plant Series
SECTION 502-542-405
Issue 1, May 1970
AT&TCo Standard
SERVICE
1565LK TELEPHONE SETS
1. GENERAL
1.01
This section provides maintenance and
connection information for the 1565LK (MD)
telephone sets. Maintenance information was
formerly found in Section 502-525-200. Connection
information was formerly found in Section 502-525-427
which is hereby canceled.
2. MAINTENANCE
Replaceable Components
2.01
Field replaceable items are listed under
Ordering Guide in the appropriate Reference
section in Division 502.
Loose Card Retainers
2.02
The P-25E803 and P-269561 are nonadjustable
card retainers. The P-25E785 (MD) card
retainer is replaced by P-25E803.
2.03
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.
(fi)
Install faceplate on telephone set.
Note: If adjusting the arms of the retainer
does not result in sufficient holding power,
replace the card retainer.
Housing
2.04
When removing or replacing housing, guide
lower front of housing over pushbuttons.
On sets equipped with exclusion, pull exclusion
plunger up to its operated position before removing
housing. Plunger should also be in upper position
when replacing housing. With housing in place,
operate plunger several times to insure proper
operation.
Lamps and Pushbuttons
2.05
Replace cracked pushbuttons or collar
assemblies. Plastic parts may be cleaned
with a water dampened cloth. DO NOT USE
SOL VENTS. Lamps should be near associated
pushbutton with contact surfaces aligned for
maximum illumination.
2.06
To replace defective lamp:
(1) Remove button and collar assembly.
(2) Gently pry lamp from socket with KS-6320
orange stick.
(3) Replace lamp, making sure that contact
surface on lamp and socket meet.
(4) Replace button and collar assembly.
Keys-589- Type
2.07
Key contacts may be cleaned using a 265C
tool, or adjusted using a 363 tool. When
adjusting springs:
(a) There should be a mm1mum clearance of
1/64-inch between contact springs and those
parts of the key which do not make contact.
(c) American Telephone and Telegraph Company, 1970
Printed in U.S.A.
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