Lanzar optidrive 6000d

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Hi guys I'm working with this unit, here is what I found. A loose
transformer on the audio section damage the audio MOSFETs and the power supply drivers and MOSFETs. The board is badly damage, but I'm going to give
It a try. The part number for the power supply driver transistors are
Mje172 and mje182, can I use the bd139 and bd140 as replacement?
If not, can some one recommend one.
thanks in advance.
 
The older version of the 4000 drive 7 IRFP064s with the A1024 and C1027 so I would suspect that the 139 and 140 would be OK. That said... I'd suggest that you order the originals since it would cause significant damage if the drivers failed.

What is the value of the pulldown resistor connected between the base and collector of the PNP drivers?
 
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