Hola a todos , me trajeron a reparar este Hifonics Brutus BXI 2006D. Ya repare la sección de fuente ya eleva a -62 y +60 , El problema que tengo es que se calientan mucho 4 transistores irf9640 q214 y q215 q 216 q217solo 4 todos los demás permanecen fríos ya revise sus resistencias 10ohms la resistencia r256 y r230 todas buenas de la tarjeta de audio le cambié los 1D y 2D le cambié DK y AG también revise las resistencias de 470 están buenas en sí el amplificador funciona pero se calientan mucho esos irf9640 los demás permanecen fríos
They brought me to repair this Hifonics Brutus BXI 2006D. I already repaired the source section and it raises to -62 and +60, The problem I have is that they heat up a lot 4 transistors irf9640 q214 and q215 q217 q217 only 4 all remain cold and check their resistances 10ohms resistance r256 and r230 all good of the audio card I changed the 1D and 2D I changed DK and AG also check the resistances of 470 are good in itself the amplifier works but they get very hot those irf9640 the others remain cold
If you measure the voltage driving the output transistors (gate to source), how does the signal level of the cold FETs compare to the drive signals of the hot FETs?
The FETs would be more likely to heat with low-voltage so that's not telling us what we need to know.
Do you have a scope?
Do you have a scope?
Yes, I just do not handle it very well I'm a novice, it's a tektronix 2236A, it's the first amplifier that I repair with transistors channel p and n in output
Read the following page and set the scope to the 'best initial settngs'. To test the scope, post a photo of the gate waveform on the power supply FETs.
Oscilloscope
Oscilloscope
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