Need Tubetech LCA-2B schematic.
« on: January 10, 2019, 01:45:02 PM »
Hi All,

My first post.

I've been getting back into analog gear for the last year, buying a console, about 40 channels of compression, preamps. delays, etc. I've bought most of the stuff used online, so have been repairing much of it that I was told was perfect. I've also built Martin Zoellers LA2A, and a TLM LA500 over the last year. I'd say that doing the repairs has been surprisingly fun and fulfilling.  Last night I fixed a Little Labs IBP Junior that was pretty fried when I bought it.

Anyway, I just got an LCA-2B in, and one side doesn't pass audio when it's off of bypass.

Can anyone help? I'd like to crack the box this weekend, and see if I can get it running, and a schematic would sure make it easier.

Thanks very much,



Whether you think you can or you think you can't, you're probably right.

Re: Need Tubetech LCA-2B schematic.
« Reply #2 on: January 11, 2019, 07:17:53 PM »

Thank you so much!


Re: Need Tubetech LCA-2B schematic.
« Reply #3 on: January 11, 2019, 10:32:06 PM »
My experience is check the heater regulator circuit first.  Also when you get the schematic match fuse that’s out to the circuit feeds.  There are 4 or more fuses on the pwr supply circuit card. When I’ve had problems, the main fuse is good.  It’s that ones inside that go.

Re: Need Tubetech LCA-2B schematic.
« Reply #4 on: January 14, 2019, 06:01:50 PM »
Thanks very much. I only got to look at it briefly this weekend. Unfortunately I was on call, and had to go.


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