2. amps-preamps
  3. 184975-152491

Chicken or egg question

Suddenly, issues developed with both my Klyne Preamp and Mark Lev 23 amp....both very vintage and never serviced but working just fine up to 3 days ago:

The pre-amp still has RCA out working but looks like a capacitor over the blalnced out module fried (given appearance of acrylic cover right over the cap)....but I can no longer put the preamp in standby mode....must turn it off at power supply.....so maybe multiple things bad???

At the same time, my amp being fed by the balanced out is now dead....but amp external fuses still intact.

I bi-amp Infinity Betas and now only the woofer column (powered by another equally vintaged ML 23) works so pre-amp rca out at least partially functional.

Did my amp go bad and partially fry my pre-amp....or the the pre-amp go bad and fry my amp?   

Maybe doesn't matter as I would like to repair both if feasible.   Or should I just give them proper burials and thank them for their years of service?

Thanks for your thoughts.

jerry_b2

Showing 1 response by gs5556

gs5556
1,241 posts
 

Connect the No.23 that does not work to the working RCA outputs at the preamp. The RCA inputs to the 23 are connected to the non-inverting (pin 2) XLR. If it still doesn't work then the amp is at fault.

Since the No.23 has two discreet circuit input stages -- one each for the 2 and 3 pins of the XLR -- there still will be sound even if one XLR leg is dead. A silent amplifier with balanced connections means that both legs of the XLR are dead. That would most likely be from a relay fault in the preamp or a broken XLR connection at the amp.

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