I was wondering if someone could tell me how to fix my Vox Pathfinder. I'm pretty sure it's a 15 watt, but the model number is V9158. Whenever I turn it on, the part circled in that (pictured closer here: } picture smokes and then my fuse burns out almost immediately. Does anyone know why it does this and how I could go about fixing it?

HI I AM AN EXPERIENCED ELECTRONIC TECH. THE IC4 DEVICE THAT IS BURNT IS MOST LIKELY A COMPLETE INTERGATED CIRUIT AND IS THE MAIN 15 WATT POWER AMP. IF YOU CAN READ A ELECTRONIC SCHEMATIC OR NEED TO OBTAIN A COPY. I AM SURE VOX WEB SITE WILL BE ABLE TO PROVIDE A SCHEMATIC AND PARTS LIST. THE PART CAN BE IDENTIFIED BY THE NUMBERS ON THE FRONT FACE OF THE COMPONENT. ANY LOCAL ELECTRONIC PARTS SOTRE CAN HELP FIND THE DEVICE OR AN EQUEAL SUBSTITUE. REPLACEMENT IS DESOLDER AND REPLACE WITH NEW PART. NEW FUSE. IT IS A WISE IDEA TO CHECK COMPONEENTS THAT ARE ATTACHED TO THIS DEVICE WITH AND OHM METER OR VOM METER THAT MEASURES RESISTANCE AND CAPACITANCE. REPLACE ANY OTHER FAULTY DEVICES TO ASSURE PROPER REPAIR. HOPE THIS HELPS. REPLY IF YOU HAVE OTHER QUESTIONS OR CONCERNS. GOOD LUCK.