Mulja tv repair portal
Spares => Spares to buy => Topic started by: johnstheone on March 29, 2011,05:48:35
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anyone got an ipos 150 rev1.8 psu board for a bush idlcd32tv16hd. I found two bulging caps which I replaced, now have sound but no picture. have been advised to also change the 3.15a 250v fuse located at f2 on the board, but have been unable to source this axial fuse anywhere.
regards
john
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got a picture.
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hi
here is a picture of the same psu. the fuse i think has gone is the one covered in a green rubber sleeve just above the unit marked 25/105/v18
regards
john
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whats the problem withit.
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have you check thease two caps for bulged tops.
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thease 2
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yes, they are the ones.
john
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sound but no picture. replaced bulging caps rated 10uf 450v. still no picture, but little red led on psu now flashing. found a post where someone had the exact same problem, then found that the green fuse had blown as well. after this was replaced tv worked. i have desoldered the fuse and circuit tested it and get no reading. the tv still has sound with this fuse removed.
john
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In my experience fuses rarely go for no reason!! Doug.
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Hi Doug
I assumed the fuse blew when the two capacitors blew.
John
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have you checked for short across the main smoother.
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has doug said,very rare fuses blow unless theres a dead short.
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hi
I have been unable to find a short anywhere on the board.
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have you checked main smoother for short.
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:sign0085:Not sure if i posted this correcly. I have a BUSH IDLCD32TV16HD and the picture has gone but i am still getting sound also if you look into the back of set there is a flashing red light . What has gone wrong and how can i fix this :sign0144: :41:
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hi
i read this topic and am a bit confused. was the fuse duff?
if it was replace it, if not, check the two white wires going to the backlight the connector sometimes gives problems as the crimps go a bit dicky.
good luck
daz
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Hi folks,
Had this problem a couple of years ago - sound and flashing red led, lower left P/S.
Never discovered the answer but donated panels to a couple of Quuq folks with other problems, they said the bits did the biz
Well, it's one answer - spinning the prayer wheel - Chris.
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Hello,
Those two capacitors you've changed are a common problem for no backlights on this power-supply.
If you have sound, I should think the P.S. is working Okay.
I would check the SMD fuse(s) on the inverter board, it's a pig to get at, (you have to remove the power-supply, cabinet etc.).
Good Luck,
John
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Hi Watteau,
What about that flashing red led lower P/S left ? - had the prob when set would function normally for some while - then the LED flash - sound OK - but no inverter - every cap checked OK with ESR meter. Next day, just the same.
Eventually farmed out panels to other Quuq heros with different problems - still curious - Chris.
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Hi Chris,
I wonder, was the inverter PCB one of the panels farmed out?
It could an intermittent problem on this PCB, and as, daz said,
poor connections are worth a check
Regards,
John.
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Hi John,
It was me what farmed out my panels after I couldn't resolve my flashing 'RED LED' issue - checked all caps and soldering - no dice.
Both folks who got the Main and Power-Inverter said the panels/bits cleared their probs - much more info listed but it gets a bit tedious.
Didn't clear my flashing Red Led, but as I now have just a screen and no panels - bit relaxed and waiting for the next set - Chris.