29 Dec
2003
29 Dec
'03
3:24 a.m.
Pete,
Yes, these components are very close to the mains. I sort of figured
this was a switching power supply given Tony's description. I used to
have a linear power supply from a drive cabinet and it did have the much
larger transformer that you mention.
Chad Fernandez
Michigan, USA
Pete Turnbull wrote:
Yes, "Q1" is a designation for a transistor,
normally. And the voltage
ratings for the capacitors suggest they're close to the mains, which
implies a sitching PSU, not a linear one. The small chicklet cap is
probably an X-rated or Y-rated suppressor cap. The transformers are
probably fairly small (an inch or two on a side), yes? For a linear
supply, I'd expect one big transformer, probably mounted on something
solid; one or more small(ish) ones are typical of a switcher. Anyway,
unless this laservision player is unusual, I'd expect such a device to
have a switcher.