Dear All

Due to sudden voltage spike last night - my stax vaccume tube amp srm007TA diode burnt out.  Can you guide through the process to fix this issue?

I have attached the images below for reference.

Hopefully the PCB seems to be intact.  But i am not a expert and any advise is highly appreciated

Thank you

https://www.head-fi.org/threads/stax-srm-007tii-amp-tube-rolling-bias-adjustment.653258/post-16389801

this person published half the schematic. This schematic is similar to, but not the same as your amp which has dc filaments.

you need to replace all the parts including the diodes and capacitors. the other high voltage caps don't look very good either.

and likely one or more of the tubes are bad.

Edited June 4, 20215 yr by kevin gilmore

Thanks so much Kevin for your response.  Would you suggest - its still feasible to source and replace all of them. From cost point of view - would it be a major overhaul.  I live in india and still searching for a Hi-tech service stores who can repair it.  Kindly advise.

don't know about buying parts in india. parts in usa are around $150.

Before you do anything, clean the inside of the amplifier

Sure - got this cleaned up and diodes/caps replaced.  Working fine now.  Thanks for your inputs