crj wrote:I gather it's preferable to short the capacitor with a well insulated 1kOhm-or-so resistor to bleed it first, and only then poke at it with a screwdriver to be doubly sure.
If you are in a workshop and have just powered it up to test, and now wish to work on it, then yes, using a suitable resistor to discharge capacitors is best practice. However, the capacitors that are being talked about should discharge via the resistors already on the board. So shorting out with a screwdriver is just to make sure that they have discharged.
Of course if vanpeebles has a suitable resistor (the value is not that critical, anywhere between 560 ohms and 4.7k ohms, but it should be rated at 1 Watt or greater and be sleeved in insulated heatshrink tube with insulated wires connected to suitable insulated test probes) then he could use that. But it's unlikely he has such an item.Mark