A couple of Bondwell 2 questions

-> On Sun, 5 Nov 2000, Claude wrote: -> -> > Bill Dawson wrote: -> > > disks. The only markings on Q1, TO-92'ish, are A854 (date code or -> > > 2SA854?) and S G D. I think this device is in the circuit to save -> -> > Quickly I would say its a 2sa854 very common but S,G,D should be for -> > Source, Drain, Gate for FET transistors...could be a fet with that -> > number... Yes, FET, not SCR. I know what S, G and D stand for. Lack of sleep contributes to mistakes. -> -> I use this part at work all the time. It is a 2SA854, simple bipolar PNP, -> I(c) of 500 mA maximum, just a general-purpose transistor. The SGD on the -> bottom is probably a lot/date code. Well, the leads are not evenly spaced. The S and G leads are closer together than the G and D leads, and the S, G and D markings are exactly over each lead. -> The leads are, facing the side with -> the markings on it, emitter/collector/base. This is why shorting the -> first two makes it work. -> -> Make sure you have proper signal at the base, then replace if necessary; a -> 2N3906 will sub but has a different pinout and (I think) not quite the -> same I(c) rating. There is a spec sheet at the Rohm website. I guess I may have to draw up a schematic of the circuit to figure out what's going on, if no one has it. I didn't write down the part number of the stepper motor driver, but I think it needs more current than a small signal transistor can pass. Bill -> -> Richard Schauer -> rws(a)enteract.com ->