I did.replaced it anyway.with the original p/n. I know that this sort of malfunction (bridge installed backwards)can back up and screw up a lot but the only damaged components I initially found were  jfet transistor Q9 which literally exploded and R35- 4.7 ohm emitter resistor. even the bridge checked out although I did rebuild the power supply-caps,diodes,bridge etc.all other transistors checked good but at this point, ruling out nothing I have replaced them all with no change.the entire preamp stage up to the junction of C26 & R48 has good clean signal. from the power amp side of R48 nothing but wildly high negative dc voltage. strange readings here; read across collector and emitter of Q12 & Q13 is...+60vdc. across collector and emitter of Q15 & Q16...-5.6VDC. reading at junction of D18 & R56 is... -24vdc. junction of D20 & R51 is... -.820 mv
. ?

that is correct.no change

replaced mje 340. no change

my bad...junction of R50 and C29 is +32vdc. the other side of R50 is -17vdc. I have already replaced C29 so I'm a bit ahead on those 220uf caps.waiting on MJE340 (VAS) and GI 752 diodes to arrive
thanks again
gordo

well...no shorts on B-E of either Q20 or Q19. both collectors are -32vdc and both emitters are -17vdc. so it's onto Q14. I'll let you know what I find. R50 readings strange. +15vdc on one side.. -24vdc on the other.

thanks for the input.I had been leary of Q14 all along. Q19 & Q20 tested good on the trace. gut I will replace them with a closely matched pair. I'm with you on the power stage.I don't believe there are any other damaged components,drivers or outputs.

252Xxc0rr.pdf is correct. there are no op amps in the power amp stage.

schematic is correct.only difference is mine has no DSP.
one development- found an open trace on  base of Q14.after repair voltages on all output emitters and bases increased to -29vdc

as per your request;  common emitter voltage of Q19 & Q20 =  -17vdc
                                                                  Q19 BASE= -10vdc                                               
                                                                 Q19 COLLECTOR= -37vdc
                                                                   Q20 BASE= -17vdc
                                                                   Q20 COLLECTOR= -32vdc 

                                                                Q14 = COLLECTOR -31vdc
                                                                         BASE -31vdc         
                                                                         EMITTER -32vdc

as I said previously the preamp stage is working perfectly

thanks much for your input and help

let me be more specific-amp powered through test lamp-no load condition.this is the non-DSP version.Page 2 of the schematic.no IC's in power amp stage of this model
collector to ground voltages at outputs are + & -34 as indicated on schematic.
emitter to ground and base to ground voltages are -21vdc on ALL 4 outputs.(not good)
voltage at + & -  of speaker terminals is -21vdc .
oddly the bias voltage is right on the money. 7mv. and it responds when I turn the bias pot.
All transistors have been curve traced and checked good.even still, as a precaution I replaced the bridge,power supply caps,all 4 outputs, Q9- is a J175 jfet in the insert jack circuit that was exploded. also R59 - 4.7 ohms was open.
all IC's check out as well as their power supply.in fact I can run the pre amp stage fine with no issues taking the signal from the insert jack all is normal.channel switching works fine.it's in the power amp.there are no IC's there. this is the non DSP version. these voltages were the same before and after I replaced the output transistors and power supply components.

ok.amp comes in-user replaced bridge rectifier.installed backwards.
replaced bridge,power supply caps, Q9-(J175), outputs- 2x TIP 147 / 2x TIP 142.
rail voltage on test lamp...+34vdc / -34vdc. collector and emitter voltage
on ALL output transistors = -21vdc.