Slow start up

Power supply. Suspect any small electrolytic positioned close to any component which runs hot in normal use, including nearby heatsinks.

Arfa

z ha escrito:

euro3 chassis. be careful when poking around in the power supply. there are high voltages stored there, in the main filter capacitor which can give a nasty belt even when the unit is unplugged. If at all in doubt about your ability to handle this , or solder , get the set to a tech.

-B

Absolutely agreed

Arfa

What sort of high voltage, 220v ? Which capacitor is that, the big electrolytic one?

I already poked around, and I am still here, so maybe it alright after all?

That's the cap. So long as the psu has started up, charge on that cap is not normally an issue, as when you power off, the primary side circuitry will keep drawing current from the cap until the voltage across it has dropped low enough that psu operation can no longer be sustained. The problem comes if the psu has not started up. That cap will be charged to the peak voltage of the line power - around 360v in the uk, but less in the US - and it will remain so after the power has been removed. A cap in good condition can stay charged enough to give you a nasty belt for hours, and in some cases days, after removal of power. Bear in mind also, that this voltage is derived directly from the line power, with no isolation or current limiting, other than the input fuse, so is potentially lethal.

Arfa