AT&T Plant Series - 5.04 1220 A Handset Field Maintenance; 5.05 TRIMLINE Dial Lamp Replacement; Dial Lamp Type Recommendation; 5.06 Cord Replacement Procedure

SECTION 502-304-101
Fig. 11-Replacing Dial Lamp in Early Production
1220-Type Hand Telephone Set
Page 8
block. If dial tone is heard with test s et, Q
remove the handset cord at the hand telephone
set and move the te . st set leads to the (G)
and (R) conductors at the cord plug . If dial
tone is not heard , replace the hand telephone
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handset cord and telephone set base .
6. CONNECTIONS
6.01 Refer to Table F for connections if a polarity
guard is provided.
6.02 Dial restriction of a TOUCH-TONE dial
equipped telephone set is controlled by the
polarity applied to the dial. Reverse tip and ring
to restrict dial, and leave the dial in the handset.
Check that ringer connections have not been affected
by line reversal.
Note: Dial restriction cannot be provided on
a TOUCH-TO E telephone set where local
instructions specify using a polarity guard.
6.03 Fig . 16 and Table B provides wiring changes
and connections required for us ing the
TRIMLI E telephone set with lAl , 1A2, or 6A key
telephone systems.
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