Re: Vestel 17MB61-2 No picture

Hej again,

So my thread on the Vestel here went a bit quiet. I hope I did not annoy anyone.

My mistake in the original post:

PSU board PL802:
+24.33V to T-CON OK
+3.33 BL ON to T-CON OK

The cable from the PSU runs to the backlight inverter board (not T-CON as written). There is no seperate T-CON (see post from vinceroger).

Any more tips or thoughts on what could be wrong with this Vestel?

Regards

SA6BUQ

Re: Vestel 17MB61-2 No picture

Yes, ReeceyBurger it lights up as mentioned in the 1st post...that is the strange thing.. all voltages seems to be fine. I get no text/image on the screen though.

Not sure where to look next... checked the LCD.. no cracks, drops, dents.. and the backlight is evenly spread across the screen.

I've worked on a few from Plasma's to LCD, and this one has NO strange noise, caps or symptoms... apart from the LED in front not blinking when I press any button on the remote....

Any thoughts will be helpful.. I am...

Re: Vestel 17MB61-2 No picture

Hej and thanks again, Dick I measured F1 and F2 and they both measure 0 ohms. When the set is on (with backlighting showing) i measure +24.33V on both. So they seem to be OK.

Roger, there are 4 mounting points on the chassis above the PSU board that are not used.. clearly this chassis was used for older versions where the T-CON board was mounted there. So it must be integrated with the panel somehow as you say... maybe high speed serial..because there are not enough wires to address the LCD transistors. Anyhow.. I attach a photo of the...

Re: Vestel 17MB61-2 No picture

...I removed the cover and measure the 10A fuse...(marked in the red square) there is a label just below it showing 24V. Is this the inverter board or ?...

Re: Vestel 17MB61-2 No picture

Here comes the rear view pics... the +24.33V I measure is on the right hand 4 wires of PSU (maybe the same thing as the inverter board?) board PL802 which then goes to the board with the black cover on the left.

Regards SA6BUQ Christo...

Re: Vestel 17MB61-2 No picture

Hej Dick, thanks for the reply.

Well, I am not a specialist and if I understand it correctly the T-CON board is the one on the left (when looking from behind the set) under the blac metal cover. The cable connected from there to the PSU to a header marked PL802 on the PSU board. The right hand 4 pins are connected to red wires and measure +24.33V. Where is the fuse located on the T-CON board?

I have not connected a SCART source and sorry, but I omitted to say that I can not turn on the set using the remote, so I cannot select...

Hi all, I have searched and read as much as I can but did not find a suitable similar case, so that is the reason for posting.

Vestel 17MB61-2 branded as Andersson A424FDC (42 inch LCD) in Sweden.
Power Supply 17PW26-4 Seems to measure OK PL816:
Pin 6 : ST_BY = 0V when powered on
Pin 12: +12V OK
Pin 14: +5V STBY OK
Pin 15, 16: +3.3V OK
Pin 18, 19, 20 : +3.3V when powered up
Pin 11: +12V =OK
Pin 13: 33V = components not fitted on PSU
Pin 17, 19, 21 : +5V OK

Symptoms:
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Re: New Members - please post your introductions here

Hi all, thanks for letting me into the forum. I live in Gothenburg Sweden and have been a radio ham since I was 16 years old. In Sweden not many people repair things (sorry to say), as it may be the case in many other countries. It is often easier and cheaper to throw out the old and buy new. As a keen hobbyist and always wanting to learn more, I find it interesting to repair things. Makes one kind of feel good about reducing scrap and the environment..Hi. Regards SA6BUQ