VESTEL 17IPS71 - Quadro TV

[rtstorm]

Hello, i have this PSU 17IPS71 that have no other voltages except 12V on CN4 connector. I found that this board have many faults and i read this threadbut did not find any help.
What i try to do:
replace U202 (FAN6300)
replace LED driver (MP3394)

All caps look ok. I check all diodes and they are ok. On D22, D24 and D26 i have 12V.

On D11, D13 and D15 i got 30V.
On D27 i have 30V on bot sides (the diode is ok, not shorted)

So on output connector (CN4) i only get 12V no 5V.
Also on IR i get 3.3V (no 5V)

[R_J]

Re: VESTEL 17IPS71 - Quadro TV

It very likely the board supplies 12v standby and not 5 volts, the lower voltages are likely supplied by regulators on the main board, and many IR work on 3v, These vestel schematics contains many circuits that may not be populated on the actual board.
What is the problem with the tv?

[dick_barton]

Re: VESTEL 17IPS71 - Quadro TV

Looking at the front of the psu there is no Q1 (BC377) fitted so no +5V_STBY
The IR may be a regulated voltage on the mainboard to provide 3.3V which may well be correct

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

Sorry guys, these pictures are not actual PSU (i download them on internet). But yes, the Q1 is not populatet on my board also.

This is the real pictures.

The problem is it wont start, no LED blink or nothing.

[arizanotlari]

Re: VESTEL 17IPS71 - Quadro TV

Hello.

Power board is working good. 5V is optional. Forget 5V and check mother board convertors.

What is mb name?

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

hello, the MB name is 17MB82S
here is the picture

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

edit: attach pics

[arizanotlari]

Re: VESTEL 17IPS71 - Quadro TV

re-program u12.

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

Only U12? Or i need to reprogram U10 also? Where can i find file to flash?
I have TL866 Programmer

[arizanotlari]

Re: VESTEL 17IPS71 - Quadro TV

Visit Eeprom dump thread.

Or my little site https://www.arizanotlari.com/17mb82-...zilimlari.html

Rewrite only u12. If standby comes download 17mb82s panelsiz yazilim from my (little) site and install usb firmware to tv.

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

I try to falsh U12 with 17MB82-1A flash but still no boot up. My panel is ves315wndb-2d-n02.
On my IR i have 5V :-)

[arizanotlari]

Re: VESTEL 17IPS71 - Quadro TV

Try this dump.
https://yadi.sk/d/-VD6Ga55GtzBMQ

[arizanotlari]

Re: VESTEL 17IPS71 - Quadro TV

Q61 is burning?

[CapLeaker]

Re: VESTEL 17IPS71 - Quadro TV

I am thinking the mediatec IC bad.

[rtstorm]

Re: VESTEL 17IPS71 - Quadro TV

i try the arizanotlari dump .bin files but still no change. The Q61 is not burning i did some solderin on it so it look like burning.

I try to heat the MediaTec IC and i got red light, but that is it. When i unplus and plug in back, again no red light.