Bell System 1220A Installation & Maintenance Manual Download Page 1 | Manualshive

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Summary of Contents for 1220A

Page 1: ...over 220A only Since this reissue covers a general revision arrows ordinarily used to indicate changes have been omitted Receiver Unit LA1 early models 2 IDENTIFICATION Receiver Unit LB1 current models 2 01 The 220A and 1220A hand telephone sets Transmitter Unit T1 Fig 1 and 2 are dial in handset type telephone sets These sets are complete telephones except for the ringer and line switch which are...

Page 2: ... GN 2433 1220A Refer to Table A for color selection o o P 8 8EO X _ CARD_ COVER 80B2A IOA FLOATING RECALL SWIT FINGERSTOP g Ib I o o _ RECALL t _ 2t SWITCH _ _ SEE TABLE A Q L 1 2 i _ADDCOLORSUFEIX Fig 2 1220A Hand Telephone Set Fig 1 220A Hand Telephone Set Page 2 ...

Page 3: ... 3 INSTALLATION b Installing a Planning 1 Connect the 220A or 1220A hand telephone set to a telephoile base by plugging the 5 1 2 foot H4DB cord Fig 3 into the jacks SaCety for yourself customer and maintenance on each component 1_ _rsonnel 2 If tip party identification is required an Location desk table wall etc H5AA cord must be used Check under number card window to see that screw used in tip p...

Page 4: ...cup CONTACTS TRA NSFORMER The illumination of the dial diminishes with increased cord lengths In installations where the illumination is considered inadequate the 53B lamp may be replaced by a 53A provided the lamp power is supplied by a 2012A transformer and the IOA DIAL combined lengths of mounting and handset cords are not less than 14 1 2 _ feet Refer to Fig 6 for dial lamp replacement _ TIP P...

Page 5: ...heard This is holder Replace holder by inserting one end done in place of depressing line switch plunger in the recess Put light pressure on the on the telephone base other end to cause a slight outward bow and snap into recess Caution If the recall switch is depressed during conversation or dialing central office equipment may be disconnected INSTRUCTING THE CUSTOMER b Floating Finger Stop 220A o...

Page 6: ...nd Fig 12 1220A Hand Telephone Set Wiring 1220A hand telephone set is recommended Diagram Transmission trouble defective dial or network should result in replacing complete handset Replace defective dial lamp and handset cord as follows a Dial Lamp To replace a defective dial W t iTING lamp Fig 6 use 553A tool To gain access to the lamp remove number card retainer number card and light seal plate ...

Page 7: ...ISS 4 SECTION 502 320 100 RESSURE APP_ ED TOWARD PLUG J f J J J Fig 8 Removing Cord From 220A Hand Telephone Set Page 7 ...

Page 8: ...502 320 100 r _ _ _ _ _ _ _ o_ _ _ o _ _ _ FLEXIBLE _ PRINTED MOUNTING SCREW WIRING DIAL LIGHT BLOCK CORD DIAL IDA DIAL RECEIVER CUP JACK CONNECTIONS CONNECTIONS Fig 9 Interior of 220A Hand Telephone Set Page 8 ...

Page 9: ...ISS 4 SECTION 502 320 100 _80B2A DIAL z _ 5 6 _ 3 4 TOUCH TONE DIAL CONNECTIONS Fig 10 Interior of 1220A Hand Telephone Set Page 9 ...

Page 10: ... i 2 iiiiiii il ii iii i ili iiiiijii i ilililiiii x ii i i i i i i i izi_i_ii ii i iiiilili RCVR iiiiiiiii TRMTR iiiiii i i i_i i i iil i i ii _ili i i x 8_ ii ii_ _ iiiii _iiiii_ili 8_ i i _ i i iSi i 8i8 iiiiiiiiill iii ii iiiii _ i i i ii ii i R R ii ii_ 3 o i 8 iiiiiii RECALL iiii ili i SWITCH _i_i_i_i_i_ CONTACTS i COLOR CODE H4DB CORD i iiii _ ili iiiiil COLOR CODE H5AA CORD iii i _i i i ii...

Page 11: ..._ _ iEi _ i i i_i_i w i_iii i_i iii iiiii iii iiii RCVR _ i i S i i _ _ TRMTR l _ii iiiiiil _iiiii_i iiiiiiiii _ iiiiiiiii iiiiiiiii iiiiiiiii i i i i i ii _i iiiiii ii iiiiiiiii i i iiiii i i _ _ _ iiiilili_ iiiiiiiiii iiiiiiiii i _ i ii iii iiiiilili R R i iiiiiiii i i i i i iiiiiii RECALL iiiiiiili SWITCH iiiiiiiiil CONTACTS _iiiiiill iii_ili _i iii ili_il _i_ _ 5 COLOR CODE H4DB CORD iiiiiiiii...

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