bush power supply v07-w04

[digby1951]

hi......this my first thread.....so here goes..Only little knowledge in this field, just basic..thanks. MODEL. FSP 204-2F02...can't find much info for this...Its from a bush lcd32tv07hd....i've only been given the supply,to test......from a friend.he says it blew the inverter,I would like to know the value of two resistors ,because they are showing one 00.7 ohms and the other same.Theres two power out puts..12v.. giving 12.11v and 24v..no output......the one marked O/F on the 12v side,gettting upto 7v.............assuming this is standby...I am thinking it as two supplys......12v for main board and 24v for the inverter. i can get a replacement board if need be.......[may be wrong]..you guys will know......cheers, and sorry for long post............sorry forgot to mention, he said the tv screen would flash on and off......

[budm]

Re: bush power supply v07-w04

The switched 24VDC will not be present until you give the pull-up Voltage on the O/F pin, you can simulate to ON command by using a 1~2K resistor between the O/F pin and the 12V pin.
If the 24VDC is still not present using the resistor, then you need to see if you do have PFC Boosted Voltage of 380~400VDC between the two legs of the main filter cap or not.

[digby1951]

Re: bush power supply v07-w04

hi...budm..thanx for time..main cap 402v...24v,output=23.9v...with 2k resistor.....cheers

[dskall]

Re: bush power supply v07-w04

With 7v on pin it would seem you would want to take it low?

[digby1951]

Re: bush power supply v07-w04

hello..the pin marked O/F..I can not get a actual reading on this pin, the voltage is not stable..plus can you tell the ohms rating of those two resistors.....my reading is in and out of circuit, are 00.7 ohms..the rest read as normal....thanx

[budm]

Re: bush power supply v07-w04

hi...budm..thanx for time..main cap 402v...24v,output=23.9v...with 2k resistor.....cheers

So power supply is fine then since you can force it on withe resistor and you have have PFC boosted Voltage and the 24vdc.
So you need to find out hwy the main board is not sending the O/F command to turn on the power supply board. Nothing wrong with those very low Ohms resistors any way.
R67 is 0.47 Ohms.
R17 I cannot tell the color, picture is not focused.
Do not forget to subtract your meter probe resistances from the readings to get the value of the resistor.

[digby1951]

Re: bush power supply v07-w04

thanx again 4 reply....resistor R17 green.gold.orange.yellow.silver.......my pal now states the inverter board has a blown a 0HMS resister near one of the transformers.and made a small crater and burn mark....hope this helps...thank you.

[vinceroger69]

Re: bush power supply v07-w04

what inverter board is used in this tv have you got a picture of it as we may of seen this fault before so can advise you of more tests etc

[digby1951]

Re: bush power supply v07-w04

hi..all...inverter No:V070-W04..........Got these he sent me these....by the look of the inverter, someones done a repair job......are these 0ohms smd's used for bridgeing...........i'll think i will go and pick the tv up....thanx again.

[vinceroger69]

Re: bush power supply v07-w04

not sure what postage cost is but at this price cant really go wrong
http://appliancespareparts.mysimples...d-buy-now-only

[digby1951]

Re: bush power supply v07-w04

hi......vinceroger69...and others......thank you , ordered it price= £4.99 plus £3.99 post....cheaper than flea bay £18.00......see how long it takes.....Ive now got tv at home....found 3 caps on main board high esr..waiting for replacement parts.....
cheers all........

[digby1951]

Re: bush power supply v07-w04

update..put new second hand, inverter board in..tv fires up....backlights on..but no picture on screen...so i plugged it into freeveiw box..still blank screen...remote seems to work..until you press the power off button on remote,the remote stops working,so you have to unplug from mains,power on ,back to normal..but still no picture.......getting 12v,24v,stby 3v.could it be firmware issue, because before this, it was booting up normal, but only for a second............cheers for any feedback.......

[dick_barton]

Re: bush power supply v07-w04

Have you got a supply voltage on the Tcon board. Look for the smd fuse and check voltage.

[digby1951]

Re: bush power supply v07-w04

hello.....smd fuse..00.3mv..both ways......thanx

[dick_barton]

Re: bush power supply v07-w04

0.3mv or 0.3 ohms each way? Measure with your probe on one side of the fuse and chassis and then measure the other side of the fuse and chassis.

[digby1951]

Re: bush power supply v07-w04

hi.. tv on...24ohms.....3.5mv.....both ways/tv off... 000mv....1.4ohms both ways...

[dick_barton]

Re: bush power supply v07-w04

Sorry but I find your reply a little confusing.
Turn the tv off.
Set your meter to ohms and place your probes on each side of the fuse.
If the fuse is good it should show close to 0.0 ohms.
If it's blown then it will show xx Kohms or OL
Then if the fuse is not blown put your meter on DC volts and black probe on chassis and red probe on one side of the fuse to see what voltage the Tcon runs at.

[digby1951]

Re: bush power supply v07-w04

......sorry my bad.....0.00 ohms.........fuse is ok....No voltage at fuse either side

[dick_barton]

Re: bush power supply v07-w04

OK so your Tcon fuse is fine but you have no voltage there which would explain why you have no picture.
Can you post clear well focused pictures of your mainbaord.

[digby1951]

Re: bush power supply v07-w04

he's the t-con and main board....so what would cause this..no picture...thanx