Epson EB-U42 projector / Caps with 0.7 ohms ?!

[narf]

just a short update: i soldered in the new buck converter IC (TI TPS54335) and have no shorts anymore. but my initial problem stays the same: the initial mosfet on the mainboard has no gate voltage and doesn't forward the 12V. i even exchanged that chip, but no luck there.

i found that the white cable of the connector ("main_on") has 0V, too. i think, this one could supply the gate voltage. does this come from a faulty PSU or is the error somewhere on the mainboard? is there a "typical" culprit?

[Diah]

just a short update: i soldered in the new buck converter IC (TI TPS54335) and have no shorts anymore. but my initial problem stays the same: the initial mosfet on the mainboard has no gate voltage and doesn't forward the 12V. i even exchanged that chip, but no luck there.

i found that the white cable of the connector ("main_on") has 0V, too. i think, this one could supply the gate voltage. does this come from a faulty PSU or is the error somewhere on the mainboard? is there a "typical" culprit?

main_on are reverse pulse at time MB send this pules to PSU i did explained this at post #5

[nossebrofredrik]

Hi,
I found this thread looking for a service manual for a EB-U42.

I have had the same problem with the IC3000 being shorted, I have replaced it but in the process some supporting components flew away.

Needed alot of heat to get the old chip off. So if someone knows the values of R3015, C3008, C3006 and R3011 it would be greatly appreciated.

Attached is a close-up photo of the placement

Thank you.


Attached