Vibe CBR12 Bass1-v2 amp repair

[lippy69]

I'm looking for some help in repairing the car subwoofer amp for this enclosure.  The FETs and the PSU side of the amp have been tested and there is one burn out resistor. the location of this is R77. Does anyone know that value this may be and also where I can find a service manual/schematic
Thank you.