Weak/No output on Tascam 48-OB

  • Thread starter Thread starter lo.fi.love
  • Start date Start date
15 years later...

I'm looking to buy a Tascam 48 OB and found one that seems great, except the XLR outs do not work due to bad relays. I'm not sure about all the factors that relate to this issue, but found this thread while researching how to fix this. If I understand this thread, the OP's issue was with the RCA outs and fixed them by replacing the relays for those -4 outputs. The problem with the unit I'd like to buy is with the +10 XLR outs. Not sure if I have the right.
The Tascam relay for the XLR outs is part K001 or K002 (essentially the same part)? Anyone happen to know if Hamlin makes a replacement for these XLR relays? Thanks!!
 
Are you certain the relays are faulty, or are the relays fine but the drive circuitry has failed? Those little dip relays do fail with age, but i could be something else?
 
Check your fuses. The balanced output amps. use a separate power supply voltage.
 
Yeah I would not be starting with the relays. And regardless K1 and K2 are not the relays I’d be looking at…those relays have to do with controlling signal during recording and sync vs repro output. K3 and K4 pass signal to the outputs…they are muting relays which mitigate thump in the outputs…but they both get their power from the same place and function at the same time, and the -10dBv unbalanced and +4dBu balanced outputs source their signal from the same place, so if the +4dBu balanced outputs are not working globally, but the -10dBv outputs ARE working, +1 to wkrbee’s suggestion…I’d start by checking the power rails that power the balance amp…+/-20V bipolar supply.
 
Last edited:
You must log in or register to reply here.
Back
Top