hi all i am working on a stetsom 1k5 amplifier.firstly i received the amp with blown outputs(irfp90n20d) shorted,all power supply fets were blown as well.i replaced the ir4427 ic and scoped the signal..got a nice square wave and installed the fets in the power supply.changed the output mosfets along with the irs2092 ic...i think a zener was reading short on the board when i pulled the ic it was reading ok.on powering up i get three blinks on the led at the top.i think its low battery indication it just flashes from power to protect three times then pause then again.i am currently using a 65amp psu at 13.8 volts to start up this amp.
can someone please help with with this one?
can someone please help with with this one?
update....i found a fep16 rectifier shorted on one side.replaced this and now i get both protection and power leds together.any help would be much appreciated.
i guess i'll have to change the irs2092 and see what happens,i'm currently out of stock but will give an update when i get it
ok folks i finally got the irs2092(pity i live in a third world country)...popped it in and got clip light and power on....another quick check revealed a 7815 regulator damaged...replaced that and all is well with the amp now
- Status
- Not open for further replies.