Just ran into one of these crazy things. It seems as an off-brand. never sene on ebefore. but guy said it died after a storm. So im assuming it got zapped.
Took it home, plugged it in, and all the LEDs on top flicker off-on-off-on. power supply is ticking.
So i tore it all the way down to nothing, power supply out, and not hooked to anything. Disabling the interlock, the power supply still ticks. I can watch my output rails swing up then back down to 0 on each tick. next tick comes, same thing happens. checked the caps ESR they are all fine, and checked all the diodes, transistors, and rectifiers in the circuit, all appear to be ok. all the major resistors are ok as well.
I have not checked most of the SMD resistors, although under a lighted magnafier none appear to have a hole blown in them, whcih usually happens with SMD resistors. Also I cannot find any data on this power supply or projector.
The power factor controller IC thats supposed to boost the 170V to 300-400V or so isnt kicking over either. so the main SMPS is trying to startup off of 170v, whcih i dotn know if it will or not. hence why it might be ticking, not enough juice to sustain itself. either that, or a serious issue in the feed back circuit, it has 3 opto-isolators.
So i pulled the datasheet up on the power correction IC, and its an infineon, 1PC08G i think? i forgot, its at the bench. the VCC doesnt even appear at the chip, its at 0V until the power supply tries to kick up. once the power supply "ticks" the meter spikes up then down.
So one can only assume that the power correcter doesnt run until main SMPS is running, because it appears the only time VCC hits the power corrector IC is when the SMPS "ticks" and tries to start. but i honestly dont think the SMPS will run without the corrector running first boosting it up to 300 to 400V
the board is a Quasar Power qp-5315 Rev. 3C.
Any ideas? thanks.