Behringer INUKE 3000 Amplifier Repair

Fault Amplifier would not power up F1 power input protection fuse badly blown. Power supply failure. The following components were replaced. T1 & T5 IRGB20B60PD1 T2 & T3 4403 Transistors IC1 KA3525A IC3 LM339D IC2 NE555D Replacing the above components restored normal operation. Note: The Behringer INUKE series of Amplifiers utilises a switch mode power supply design rather than the conventional transformer design. When the power supply fails, multiple components will be damaged although many will have no visual indication of failure. In all cases a bulb current limiting device must be used. This will protect newly installed components failing during testing if a fault still remains The schematic for the Amplifier can be down loaded via this link