Hy
I have built a STK4231 amp using the schematic in the datasheet with all the protection and mutting circuits. Now the amp worked fine until i have shorted some pins on the PCB with a screwdriver, but the amp was shut down at that time. From that moment the amp did not powerd on again. I changed the STK chip with a 4241 and all the transistors and . . . . the same. I have changed the diodes and . . . nothing. No noise, no nothing. Only when i touch the pins 1 and 22 with my finger i can hear a brooom. This happens with both the stk chips the 4231 and 4241.
Any ideas ????
I have built a STK4231 amp using the schematic in the datasheet with all the protection and mutting circuits. Now the amp worked fine until i have shorted some pins on the PCB with a screwdriver, but the amp was shut down at that time. From that moment the amp did not powerd on again. I changed the STK chip with a 4241 and all the transistors and . . . . the same. I have changed the diodes and . . . nothing. No noise, no nothing. Only when i touch the pins 1 and 22 with my finger i can hear a brooom. This happens with both the stk chips the 4231 and 4241.
Any ideas ????
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