Driver board issue solar amp

[shanecapetown]

Hi guys im currently busy on a solar amp when the driver board is in the amp turns on then off again there is no output fets in but if i remove driver board it stays on no protection i tried removing driver ics still does the same

 

[shanecapetown]

Does anyone have a schematic or picture of this driver board

 

[Perry Babin]

What would you need to see in a photo?

 

[shanecapetown]

R21 and R30

 

[Perry Babin]

http://www.bcae1.com/temp/dwm3640classDdriverboard02img290.jpg

R30 varies with various amps. It sets the threshold voltage for the protection and has to match the shunt resistor and current limits for the amp to allow the protection circuit to work correctly.