sundance-communications.com/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 1A2 key ?

I worked on a 1a2 key today first time in20 years?? I went brain dead?? OK the line rings in the light lights, push the button down thelight goes out.. You can still talk and put it on hold but no lights ?? HELP.

Was this on all lines & phones, or only 1 line or phone?

If it was all phones but only 1 line, then I would suspect the line unit (400D or ??)is failing.

If it is only on 1 phone, then there maybe something wrong with the key shelf of that phone.

OR, someone may have changed the way the 10VAC is distributed, and you may need to double check the fuses.

It was on all 5 lines and all phones ?

"My car makes a funny noise. Can you tell me what's wrong with it?"

As a starting point, if you were to let us know the brand and model of the KSU, we might be able to help. Then tell us if you are describing a condition on one phone, all phones, some phones, all lines, one line, some lines?

If the KSU is a 584 panel, it might be the steady lamp fuse.

If not, then it might be the 400 KTU.

"is" or "was" ?

Is that a statement or a question?

Is the interrupter working?

Is it plugged in all the way?

Do you get lamp wink when the lines are on hold?

Do you hear the motor turning?

Is it a solid state interrupter?

Have you checked all the fuses?

Did the system take a lightning hit?

When you say "line rings in lite lights" is that a steady lite or flashing, how about the bells cb or per line. all lines all phones sounds like interrupter, trouble.

I'm with the rest of the guys. If it's a shoebox/501/601 and it happened on all lines and all phones then it' probably the interruptor.

If it's a 584 panel then it could either be the interruptor or one of the flat fuses on the back of the unit that (as Arthur said) supplies "steady lamp voltage".

Sam

IT is a Stromberg Carlson 1A2 Key Service
584 C Panels The first line rings in and lights
when you push button light goes out. But you can put in on hold but no lights.. Second line rings, no lights check line nolight can also put on hold.. 3 & 4 ring in with lights push button no lights.. all lines can be put on hold..
Check all fuses replaced bad ones 4 ..Interrupter runs... I have 2 extra panels in cabnet but do not know if OK.. This is a very old box??? Comdial sets 30 btn..

I was going to say to try swapping the interruptor from one of the unused panels, assuming it is identical (power down the system first, hot-swapping is frowned on with 1A2).

But, if I read your last post right, you are saying that there were 4 blown fuses on the 584 panel? I don't know if I'm reading that right, because it would seem that nothing would be working at that point. If that is true, then you need to find out what caused that. Two possible causes come to mind: A wildly malfunctioning power supply, or a 25-pair amphenol laying in a puddle on the floor somewhere.

Jim
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