Mulja tv repair portal
Equipment Repairs => LCD TV forum => Topic started by: Mac0001UK on October 10, 2009,22:54:37
-
I have 1 of the above televisions. It suddenly decided to show no picture from any input. It has been in for repair here locally and a fault has been identified. This was on the Inverter Board and concerned a Tx. marked 6024B709005 (GP) -03. The technician has removed this part but was unable to source a replacement. Does anyone know where I can obtain one please.
Cheers,
Mac
Below are Top & Bottom views of the offending item, pardon the hair.
-
The transformer looks open circuit. The break seems to be the bottom left clearly seen between the winding and the edge connector. Careful cleaning and soldering a bridging wire will cure it.
-
Thanks for that Theo,
I got all excited and thought "I can do that", but twas not to be. It looks like it due to my poor photography, lighting etc., but on closer examination with a strong magnifier it seems that the wire does actually continue into a gel-filled cavity, presumable connected within.
Cheers,
Mac
-
hi
have you measured the windings with meter to check the
readings (ohms)
-
Hi Sparky,
I haven't mainly because I would have no idea which pins to measure across. If you have any clues on that I would be most grateful to receive them.
To be quite honest I have no idea what this component actually is. To me it looks like a SOIC plugged into the top of some sort of winding assembly but I am probably very wrong.
Anyway, any help would be most gratefully received.
Cheers,
Mac
Hi Sparky Again,
I have now put a meter across the pins. All show as open-circuit except between 2 & 3 which are virtual s/c. I can physically see the wires from each end of the centre windings terminating there so that makes sense. Where the other windings actually terminate is anyones guess. I still have to consider that it is the component on top of the windings at fault.
Cheers,
Mac
-
hi
the component on top is just ferritte cover ,it
stops the coils from vibrating i will look in workshop
for part you require
sparky
-
Sparky,
Thank you very much, I look forward to your reply.
Cheers,
Mac
-
hi
have had a look not got one
can you read pin 4 + 5=
read 1+8=
pins2+3 do read s/c
thanks sparky
-
Hi Sparky,
Thanks for taking the time and trouble to look for me.
I have measured across 4+5 = open circuit
I have measured across 1+8 = open circuit
I don't know.
I have done web searches using the Part Number on the top but no joy &, you wouldn't believe it, the standby telly I was viewing has just gone totally dead as well! :mad:
Cheers,
Mac
-
sorry can't help you for replacement
will keep my eye's open in case i come
across one
-
Thanks very much Sparky,
I live in hope and down to my last rather inadequate telly for the moment. :huh1:
Chers,
Mac
-
Both windings are O/C. They should each read between 950 and 1000 ohms. Pins 2+3 should read S/C or if you have a good meter 0.5 ohm. Check the board to see if it was made by DARFON, if so the part you need is available under another number. 4006 or 9?????????????????? Seen them on ebay.
h**p://cgi.ebay.co.uk/LCD-INVERTER-BOARD-TRANSFORMER-TYPE-4006A_W0QQitemZ260485314074QQcmdZViewItemQQptZUK_AudioTVElectronics_Video_Televisions?hash=item3ca622761a&_trksid=p3286.c0.m14
-
beware they say will work but don't you might not get your
cash back,check previous posting
-
Tend to agree, there are plonkers out there selling the o/c ones.
-
Thanks Theo,
I shall have a look at the board, and be careful where I go from there.
Cheers,
Mac
-
Hi Theo,
Sorry to be a pain in the neck.
I have looked at the one you suggested on eBay but I have also found this one, I think.
http://www.ohmsupplies.co.uk/epages/62027733.sf/en_GB/?ObjectPath=/Shops/62027733/Products/TX01
Is the one at the top of the page what I am looking for?
Cheers,
Mac
-
have you got the board there if so
measure other transformer to check
the readings might be able to see other
models that may fit
-
I think you have a Darfon board, the ones at Ohms look ok. You will need to check if the supply to the inverter is 12 or 24 volt. The best bet, drop them an e-mail and ask the suitability for your model.
-
Hi Theo,
I definitely have a Darfon board marked: -
Darfon V183
4H.V1838.461 /B
DS-1926006341-738-0000000-0436-01
Whatever all that means.
Thanks for the advice, I will email them.
Cheers,
Mac
-
Hi Theo,
It's me, the pain in the neck, back again.
I emailed those people as you suggested and got a negative reply.
After trolling round the web, I even looked for a replacement Inverter board, I am more confused than ever.
My question is this, are the ones on eBay you pointed me at originally the right ones?
Cheers,
Mac :wallbash:
-
hi
some people will say they fit and work(sold as seen)
but the reading of there terms mean you have no
chance of getting your cash back
sparky
-
Hi Theo,
Thanks, I guess I will just have to suck it and see.
Cheers,
Mac
-
The 4006 type could probably be made to work. The end pins are the same as all Darfon boards. The middle ones look different. 4006's have a slightly different arrangement even though the winding would be the same. A pic of the board would be good to see the connecting pads of the pcb with the transformer removed. The logic here is, 8 connections on transformer, 6 coil ends, so 2 might be just for anchorage purposes and not needed. From your pic, 2 of the centre pins are no connection. Measure the resistance between the 4 centre pins (on the panel) with the transformer removed, if you get around zero ohms, it's more than likely the 4006 type will work without any wiring modification to the pcb.