Author Topic: 1a1 1a2 schematics needed  (Read 407 times)

Offline RB

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1a1 1a2 schematics needed
« on: June 19, 2019, 12:39:40 PM »
Can someone post a schematic for a 1a1/2 key system?
Can't for the life of me find one ???

Offline Babybearjs

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Re: 1a1 1a2 schematics needed
« Reply #1 on: June 19, 2019, 01:39:21 PM »
which one do you need? the TCI Library has them, but you need to know which model you need the information on....
John

Offline RB

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Re: 1a1 1a2 schematics needed
« Reply #2 on: June 19, 2019, 02:44:10 PM »
The basic model would be fine

Offline Babybearjs

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Re: 1a1 1a2 schematics needed
« Reply #3 on: June 19, 2019, 04:46:39 PM »
you need to go to the TCI Library and download a copy of the KSSM. its the Key System Service Manual. it will give you pretty much everything you need. also there is a copy of the 1955 1A1 manual in the library, that will help too!
John

Offline Key2871

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Re: 1a1 1a2 schematics needed
« Reply #4 on: June 19, 2019, 05:25:24 PM »
What KSU do you have? Because that also helps to know.
KEN

Offline HarrySmith

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Re: 1a1 1a2 schematics needed
« Reply #5 on: June 19, 2019, 06:14:26 PM »
1A1 & 1A2 is a pretty broad description. KSU's, power supplies, telephones etc. I think you need to be a little more specific on exactly what you are looking for. Whatever it is, it will be out there somewhere.
Harry Smith
ATCA 4434
TCI

"There is no try,
there is only
do or do not"

Offline RB

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  • Love old phones
Re: 1a1 1a2 schematics needed
« Reply #6 on: June 20, 2019, 06:30:38 AM »
OK, did not realize I was asking such a broad question.
specifically, I am interested in the area of the lite and buzzer circuits.
I wish to see how they are powered, and how they are routed to each phone.