Hello,
I ruined my PMA 560. By accident it runned 10 minutes with very low impedance load in one channel (by mistake I made short circuit at woofer in DIY loudspeaker) and then there was some smoke.
I looked inside and one of output transistors in left channel (2SA1491 - TR529) looks broken but other element doesn't look smoked or fried at all.
Will it be enough if I replace output and driver transistors (TR527, TR529, TR519, TR521)? Is it possible that more elemets is damaged? I have some experience in replacing elements but not in looking for damaged elements
Should I check other transistors or diodes, resistors by taking it out and checking with multimeter? What else could be damaged except those four transistors in this situation?
I ruined my PMA 560. By accident it runned 10 minutes with very low impedance load in one channel (by mistake I made short circuit at woofer in DIY loudspeaker) and then there was some smoke.
I looked inside and one of output transistors in left channel (2SA1491 - TR529) looks broken but other element doesn't look smoked or fried at all.
Will it be enough if I replace output and driver transistors (TR527, TR529, TR519, TR521)? Is it possible that more elemets is damaged? I have some experience in replacing elements but not in looking for damaged elements
Should I check other transistors or diodes, resistors by taking it out and checking with multimeter? What else could be damaged except those four transistors in this situation?