Bell System Practices 630 Series Installation And Maintenance Manual page 13

1SS 4, SECTION 502-600-100
SET
P
1
IE 9
CONN
CABLE
MOUNTING
CORO
A
/4
/ CORO
/
&
08s
M TG
CORO
"%
680-TYPE
\/
TRANSMITTER
108-TYPE
LOUDSPEAKER
SET
Fig. 20—~4A Speakerphone System Arrangementr
CALL DIRECTOR Telephone Sets Using 223A (MD) or 223D
Adapted
(6)
Disconnect mounting cord leads at network,
terminal board, and amplifier (when provided).
(7) Remove mounting cord retaining screws on
each side of key frame (early production
sets).
(8)
Pull down on mounting cord frame to
disengage plugs from key connectors on early
production sets or disconnect individual 508- or
509-type plugs on current production sets.
(9) Install cord assembly in reverse order.
3.o4
To replace a defective lamp in the current
production telephone sets, simply remove
cap from key and insert a 553C tool through opening
in button to remove lamp.
In early production
sets it was necessary to remove faceplate, cap, key
collar, and button or shield to gain access to lamps.
3.05
(1)
(2)
(3)
(4)
To remove a defective ringer from early or
current production sets.
Remove housing.
Loosen dial mounting plate and move to left.
Disconnect ringer leads.
Remove NIA or TIA ringer mounting screws
from underside of baseplate (Fig. 27) or
loosen captive screws of D1-type ringers (Fig.
28).
(5) Lift out ringer.
Page 13