Bell System Practices 630 Series Installation And Maintenance Manual page 4

SECTION 502-600-100
(2}
Loosen screw at each end of key module.
(3) Grasp both ends of key and lift upward to
disconnect connector.
(4) Move key toward rear of set until front
end clears mounting frame.
(5) Raise front end of key–move forward and
up to remove.
2.13 ]nstal] the 59o- an? 650-series keys in
telephone sets as follows.
K
Before installing additional keys or
!
replacement keys, check for free pivot
bar motion and proper return spring
action (Fig. 7).
(1)
bar
(2)
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J
Fig. 5 —Prying Faceplate From Two-Piece
Telephone Set
Bezel of
Fig. 6—Housing Retaining Screws
Install the desired key and tighten mounting
(3) While holding the (reference ) key latchbar
screws. Check for clearance between pivot as in (2), slowly depress the top button of
and connector mounting bracket on key. the key and obser~e the effect of its latch bar
on the pivot bar.
If the pivot bar moves
significantly in the for~vard direction, the installed
Depress the top button (first line r~ickup) key is postioned too high. To correct, loosen
. .
of the key in left-most position until its bar th; scr;ws and slightly lower the key until the
moves to its forward-most operating position
pivot bar has no perceptible forward motion.
and hold in this position.
Do not lock do~vn. Retighten screws.
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