coryjrogers

I'm using the PSU Wilba links to on his page. The Jameco 12vdc 1A regulated psu. http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=1953663&langId=-1&storeId=10001&productId=1953663&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView

When I was doing step 2 of the voltage test I heard a pop and saw smoke. Then started problem solving to get figure out what caused the smoke. The over heating bc337 seemed the problem. I don't think the 3 pads should trip continuity on my multimeter.

So after installing all components and a voltage check on the base I installed the CS. There was a pop and smoke. I've been checking parts and levels over and over, during which I noticed the T1 was getting hot. I replaced it and tried the brightness test Wilba described in another post by putting an led in the b+ and b-, this didn't work. I removed the T1 and tested around and discovered that all three pads are shorting to each other. What now?!? :sad:

All Voltages on Base PCB fine. What should I be measuring at T1 and P1? Voltage or Resistance? I got a new PSU. The 12VDC 1000mA Regulated one Wilba links to and I'm waiting on a new LCD screen.

So I had the same experience as MOP. Installed everything. Voltage checks across the base PCB all fine and stable 12.3V for the JBL right pin. I then put the JBL shunt in for 12V and the J4 assuming I had a high-powered LCD screen. My PSU is labeled 12VDC 1.25A Regulated. But like MOP I turned the brightness clockwise and heard a small pop and saw smoke. I tried taking the J4 shunt out and tried again, more smoke. I moved JPL to 5v, screen lights up, contrast works but brigthness doesn't. I think the smoke and pop came from the left side of the board. Is the 1.25A of my PSU too high? Cory