Repair-recovery JL AUDIO 500/1

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Good time!
I ask for help in repairing and repairing the excellent amplifier.

He got to me after not qualitative repair by masters with crooked hands.
The last owner does not completely bank him, 2 ribs are broken ..
Transistors of amplification on not known and more narrowly all cheap manufacturer have been replaced.
Interested in the possibility of finding a circuit diagram for this amplifier...Any scheme used electrical components (list, table, anything))
Questions that interest me, ..

Type of transistor for amplification ,. I understand the IRF 540?

Which manufacturer is reliable and quality? TMOS...Vishay Siliconix?
 
In the buildup of PSUs like KTC4379 / KTA1666 stand, in the booster 3207,1070, use 2690,1220 as it is not appropriate, it's better MPSA43 / 93 (the legs are not difficult to expand).... instead of 540 better IRFB41 (51,52) N15, or similar on 150V (at 80B + use 100V transistors on the face, especially in D chot not very
right decision) like that?
 
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