orion tv-3802 burning on mainboard

[shaunbt123]

can someone please give me some advice regarding this tv.
the fault was when tv was plugged in the red standby light would come on but if you pressed channel up/down button it would switch on (green light) then off again.i read it could be in hotel mode and by pressing the volume up and power button for three seconds it would come on,i did this and sure enough the screen lit up and the red light went to green.and stayed on green,,but there was no menu or nothing on the screen i waited for a minute but could smell burning from the mainboard i checked the main board and there is a component burned out,could this be the mainboard that was faulty or could the power supply board have been faulty which burnred out the mainboard.

[selldoor]

Re: orion tv-3802 burning on mainboard

Well you can see what your talking about, but we cant.
You dont even say what burnt out.
Please give more details and post good clear pictures of both boards top and bottom.

[shaunbt123]

Re: orion tv-3802 burning on mainboard

thanks for the reply here are some pictures of the board ,the part number of the board is cmf093b.the number above the component which is burned is Q3805 .i have found a parts list and diagram for the board which says q3805 is a silicon transistor.
if you need anymore pics please let me know.i know the pics are not great but best i could do with my phone.

[selldoor]

Re: orion tv-3802 burning on mainboard

Not a clue- looks to be in the power regulation section of the board may help
others help if you post the part number of the regulator IC3801? and the big IC IC301

What plugs into that socket just above

[shaunbt123]

Re: orion tv-3802 burning on mainboard

both those connectors go to the power supply board.

[multimeter]

Re: orion tv-3802 burning on mainboard

going to need better pics than that im afraid....

part number of ic that is burnt?

main board part number?

3 pin device burnt,could be a voltage regulator,if 8 pin could be a EEPROM

[selldoor]

Re: orion tv-3802 burning on mainboard

Hi Shaun is the service manual you have specific for that board. I have been looking but the manual I found I think is for another board it has those transistors as 3 legs - there is another post on the forum that has that board,

Is it your intention to try and replace the transistor or get a new board?

Also is the heading wrong is it A TV- 32802 can you change it?

[shaunbt123]

Re: orion tv-3802 burning on mainboard

yes you are right, that manual says that transistor has three legs,i think i will have a look for another board.and ill change the heading i didnt notice that.thank you.
it wont let me edit my first post anymore.

[selldoor]

Re: orion TV- 32802 burning on mainboard

If you go into the thread using post reply maybe you can enter a header at the top - if you do it it may change it for the thread or maybe just for the post I dont know.

Anyway I suppose if you can get a board you will then be able to get a part number maybe get a part and fix it then sell it.

Oddly enough I did come up with a toshiba 32 inch that has a 6 leg transistor at Q3805 but it wasnt the same board so no good guessing. Your sure it has no marking at all?

Just in case you miss it as they have a few entries for that board but most come up as out of stock
http://flattvparts.co.uk/index.php?m...oducts_id=5508


EDIT
These boards are also in some Polaroid TVs

[shaunbt123]

Re: orion TV- 32802 burning on mainboard

ill try to correct the model number in title.
thanks selldoor