Greg
Well-known member
For an unknown reason, the autolocator for my Tascam ATR-60 crapped out on me. I tracked it down, with the help of John LaGrou, to a problem the PS. The PS produces +5VDC and +14VDC. The loads are ok, and even unloaded the PS checked out, it just seems seemed like the +5 rail was crapping out under normal loading. I looked the bottom on the PCB, and sure enough, one of the transistors (2SB507) looked fried. So I pulled off both transistors (PNPs), and tested them by measuring from B to E and B to C. One of them checked out fine (a 2SA1015), and on the other one (the one that seemed fried), B to E and B to C were all showing open. When a transistor burns up, will is open, or short, or either one? I also lifted the end of the diode connecting from B to C on the transistor that fried to make sure it wasn't shorted, and it is fine. Before I order and place any components, I wanted to see if you guys can think of something else I should check.
Also, how do I test a bridge rectifier?
Also, how do I test a bridge rectifier?