Hello i have an problem. I have 8 ice power 200asc amplifiers and only one have 100%output, next one have 70% , rest of them 5-20%. I have change all fouly tht capacitors, nothing have change. Measured for short all transistors, capacitors, diodes. Everythnik looks okey. Power supply section work properly and have 47vdc , +-12vdc. Where is the problem? Very thanks.
It seems a Class D made with discrete elements. Try to take a pic of the chip's part numbers, or write down here.
If the amplifier dimmed slowly wirh time, suggest to me a degradation in resistors. If the PSU has proper output voltage, thus we can discard it.
Do you own an oscilloscope to take signals from it and see if audio has fall only or the RF carrier too?
If the amplifier dimmed slowly wirh time, suggest to me a degradation in resistors. If the PSU has proper output voltage, thus we can discard it.
Do you own an oscilloscope to take signals from it and see if audio has fall only or the RF carrier too?
Hello. Thanks for reply. Yes PSU seems to work. Here are some pictures off chips i cant measure. I dont think the problem is in resistors becuse thouse looks good. I have an oscilloscope but i think i cant connect it do this ice power amplifier becouse output minus has not connection to pcb gnd. And the oscillosope have gnd connected to earth..
