DHD 250w 4channes

megael9

Member
Paid Member
2009-10-13 9:36 pm
Hello
I'm working with a DHD power cruiser, one of the three channels is getting hot.
I injected a 150 hz square wave and scoped it at the audio mosfets gate pads, and all signals were present for the working and non working channels.
The only difference is that using my multimeter, the voltage at the non working channel is about 1.5 volts higher the three working channels.
I pulled out all driver transistors for that channel and they all cracked OK.
It looks like I'm having a preamp problem, does anyone have the schematic or something similar for this unit?
Thank you.
 

megael9

Member
Paid Member
2009-10-13 9:36 pm
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