Focusrite ISA Two repair

[12afael]

Hi, I got a Isa two for very cheap. it suppose to have a problem on the power supply but after testing it I don´t think there is any problem with it.
but on the preamps I found a couple of exploted electrolitics C222, C243 and C253, all of them 100u25V. I could just replaced them but would be great to have the schematic to verify why they blow.

there is also a report of R194 1ohm resistor on the power supply failing. I´m going to test it now.

I sent an email to Focusrite just in case but I would appreciate to hear if someone have found a similar problem.

best regards
Rafael

 

[kags]

I believe Thermal Relief services Focusrite and maybe would share the service docs with you. Focusrite Service – Thermal Relief Design

They have helped me before with Focusrite and TubeTech info.

 

[Khron]

I could just replaced them but would be great to have the schematic to verify why they blow.

Well, unless they're a Japanese brand, there's a chance they blow just because they've lived their life...

 

[12afael]

Thanks Kags, I will drop them an email.

Khron. it is possible. the ISA Two was released 2012 but I don´t know the year of this particular unit. the caps does not look high end at all. I would expect them to last a bit more but who know the temperature in the rack, etc. I have seen marshalls with original caps still going...