Bell 6B KTS Manual page 39

Key telephone system
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NO
BSP 518-411-100 -i01 1978-08-39. jpg
CHECK OPTION
PLUGS ON
ASSOCIATED
484A KTU
CHECK FUSE
YES
ON FUSE
BOARD
REPLACE
4BSA KTU
Fig. 1 3 - lntercom Buzzer Does Not Operate
Scanned by Frank Harrell, Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 2 1 :09:32
ISS 1 , SECTION 5 1 8-41 1 - 1 00
TROUBLE
CLEARED
NO
REPLACE
BUZZER
TROUBLE
CLEARED
NO
CHECK FOR FAULTY
BZ , BZ 1 , OR B
LEAD WIRING
REPLACE
ASSOCIATED
4B4A KTU
Page 39

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