Northern Telecom Decorator Series Identification, Connections And Maintenance page 14

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Fig. 7- Schematic Diagram for QSK420-Type Telephone Set
CHART 9
ADJUSTING TRANSMITTER HEAD POSITION
STEP
PROCEDURE
Caution: The movement of I.he transmitter
head
cannot be restricted
by
over-tighlenlng I.he
moundng screw.
Remove the mounting screw, spring and hinge pin assembly (Fig. 8, Items 63, 88 and 12S).
2 Stretch the spring to increase its length.
3 Replace the spring, hinge pin and screw through the upper column and transmitter housing
assembly.
4 Tighten the mounting screw:
Note:
The key in the hinge pin must fit into the corresponding upper column key slot.
© Jeff Lamb
info@telephonecollectors.org
1089