Not sure how useful this information will be to anyone at this point, but I might as well share my findings since I already did the work.
A little backstory first. I bought three Audiosource AMP Seven T amps back in 2007. They had a habit of blowing the FETs and TA0104A module if you so much as looked at them wrong. Putting in a new module without replacing the failed FETs would instantly kill the new module. They ended up killing 7 TA0104A in total (the 3 original plus 4 replacements), so I put them on my "shelf of shame" and left them there until recently. I wanted to give one last go at repairing them, but the only sources for TA0104A at this point are Aliexpress for $90 or Audiosource on eBay for $110. Knowing how fragile they are, I wasn't willing to spend that kind of money.
I've taken the plastic covers off of most of the modules that died, and it appeared to me that the only difference between the TA0102A/TA0103A/TA0104A was probably some passive component values, but I didn't have a TA0102A/TA0103A to compare. I recently saw a listing on ebay for 3pcs TA0103A for $30 and quickly bought them (they can be found on Aliexpress for around $35 each). I popped the cover off of one and compared it to a TA0104A. I noticed a handful of resistors with different values and proceeded to swap them out. After doing a few other mods/repairs to one of the amps, I popped the modified TA0103A in and powered it on. Success! I now have at least one working amp again.
Anyway, here are the 1206 resistor values that need changed...
1.05K - R5, R18, R20, R21
4.99K - R52
19.8K - R35, R48, R49, R50
680K - R53, R54, R56
2M - R55, R59
I should mention that there are also 10 light purple colored 1206 ceramic caps that I just took a chance on being the same. I removed a couple and tried to measure them, but my meter only goes down to 1nF.
A little backstory first. I bought three Audiosource AMP Seven T amps back in 2007. They had a habit of blowing the FETs and TA0104A module if you so much as looked at them wrong. Putting in a new module without replacing the failed FETs would instantly kill the new module. They ended up killing 7 TA0104A in total (the 3 original plus 4 replacements), so I put them on my "shelf of shame" and left them there until recently. I wanted to give one last go at repairing them, but the only sources for TA0104A at this point are Aliexpress for $90 or Audiosource on eBay for $110. Knowing how fragile they are, I wasn't willing to spend that kind of money.
I've taken the plastic covers off of most of the modules that died, and it appeared to me that the only difference between the TA0102A/TA0103A/TA0104A was probably some passive component values, but I didn't have a TA0102A/TA0103A to compare. I recently saw a listing on ebay for 3pcs TA0103A for $30 and quickly bought them (they can be found on Aliexpress for around $35 each). I popped the cover off of one and compared it to a TA0104A. I noticed a handful of resistors with different values and proceeded to swap them out. After doing a few other mods/repairs to one of the amps, I popped the modified TA0103A in and powered it on. Success! I now have at least one working amp again.
Anyway, here are the 1206 resistor values that need changed...
1.05K - R5, R18, R20, R21
4.99K - R52
19.8K - R35, R48, R49, R50
680K - R53, R54, R56
2M - R55, R59
I should mention that there are also 10 light purple colored 1206 ceramic caps that I just took a chance on being the same. I removed a couple and tried to measure them, but my meter only goes down to 1nF.
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