Re: Toshiba 37RV555D - black screen, green led goes off after few secs

Ok, I checked voltages once again and it seems I was wrong, PFC voltage is 388V while "power" is pressed and 308V on standby...
Seems I gotta look for the firmware and see if it helps.

Re: Toshiba 37RV555D - black screen, green led goes off after few secs

To be clear - by the voltage on the cap you mean voltage on the PFC_OUT pin? Which in fact is voltage on the output of the bridge rectifier? In my case this bridge rectifier is supplied by voltage from relay which short circuit one resistor. So if I assume well, there must be something with my resistor or with relay? I'll check tomorrow morning and post back the results.

EDIT: Yup, it looks like my power supply board

Re: Toshiba 37RV555D - black screen, green led goes off after few secs

I read somewhere that PFC voltage should be 1.4 times main voltage, which at 220VAC should be ~310VDC. I assumed that's correct. If not I'm gonna look after that.
I Uploaded schematics. Page number 75 is the one I think seems odd. It's night in here so I'll post pictures tomorrow morning. But on the schematics page 68 there are connectors with labels. Hope it'll help.

Will try to flash firmware if I find one. That's at least some idea to start with....

Hey,
My father told me to trash his broken TV, so I decided to look inside it and maybe learn something

Here is the thing - after I plug in the TV, standby red led is on. I press "power", there's relay click, green led goes on for a few secs, screen is black all the time, green led goes off, relay clicks again.
Standby voltage is 5V, after I press "power" and measure transformers voltage, everything seems right(according to schematics), PFC voltage is 315V. One thing that seems off to me is voltage on IC MPD6S030(page on schematics titled as...

Re: New Members - please post your introductions here

Hi, I'm Paul. I'm MSc in Electronics and Telecommunications, however I found a job as a maintenance engineer in some industry company and I kinda forgot some things. I want to remind some of the electronics so I think this forum will be great for me