I have a bad cap on a pcb that simply reads
A/
0.68/10
250v
1.70MKR
What shall i replace it with ?
250v 68000uF ????
i dont think its aluminium either.
Russ300
Member
Last Activity: 06-14-2015, 10:39 PM
Joined: 12-05-2014
Location: england
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What the hell is this ?
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samsung 37" dark screen
Hi guys, sorry for the lack of info on this, I have a Samsung 37" think its a 4 series, the image and sound are but the whole screen is really dark, turning contrast and brigtness up helps a little, can someone point me in the right direction, cheers, should i be tempted to buy a new inverter board ? -
Re: Panasonic LSEP1287 4 blinks
quick testing with components still soldered to board:-
D451 - shorted both directions - diode test function on multimeter
D441 - OK
IC771 - appears ok
D503 - shorted
D536 - OK
D522 ok
D534 ok
Q701 ok
D701 shorted
Plus the three pther FETS shorted.
I think this is uneconomical to repair -
Re: Panasonic LSEP1287 4 blinks
Ahh right, thanks tw2005, I just set email notifications of when someone replies to a thread i have started.
Anyway, two panasonics have come up on ebay from the same seller with broken screens
TX-P50X20B and TX-P42G15B, would these have the same or compatible boards in i require ?Leave a comment:
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sony kdl 46d3500 lines
OK so its not the Tcon as i replaced already, is it bad bonds, tcon cable or Main board ?... -
Re: Panasonic LSEP1287 4 blinks
Rjp63 - q661
Fu20 - d481
Dg501- q451
This is turning into something financially uneconomical to repair if this doesn't fix itLeave a comment:
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Re: Sony KDL-46D3500 - no image, just bars
Hi guys, I have this problem, the tv below is via scart so im assuming its not a Main Board problem.
the image is split and the menu is in reverse...Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
OK so the RJP30E4 's survived, i have thre shorted components on SN
DG501RP
FU20 TM5S
RJP63f3A
UT source have all these in stock but something wrong with their payment page, any other reliable sources you could recomend to supply all these in one easy transaction ?Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
Bugger ! Replaced the 4 RJP30E4, powered it up, a large buzzing noise occurred, a flash of smoke from the right hand side of the set as you look at from the front, now im getting 8 red flashes :-(Leave a comment:
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Re: Isis-42-913-led3d
Isn't there a way to override it or acknowledge it and carry on ?Leave a comment:
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Isis-42-913-led3d
Hi guys, I'm working on a tv right now and it's baffling me, the power was blown ( vestel 17pw25-4) so I bought and fitted a new one, now it powers up, the back light comes on for a second then it shuts down again ! I swapped out the inverter for a different one and the same fault is happening, there is only the main board ( 17mb65-2) and the t-con remaining, it has an lg led lc420dun panel in it , could this be faulty ? -
Re: LG 42PC56 fault
Hi guys, hope its ok to re-ignite an old thread ( seemed smarter than opening a new on)
I have a problem with one of the LG 42PC56, as i far as i can remember it went like this, I take the tv off a friend with a whole load of spare boards from an identical set with a supoosedley smashed screen, he had swapped out the PSU, z sus and Y sus, the Y sus did make a difference, on inspection the Y sus had a b,lown fuse and the hybrid chip is shorted out, now i put the original Y sus in and changed the Main signal board, the set then powered up and shut...Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
ok, thanks, I will have to purchase from eBay for conveinenceLeave a comment:
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Re: Panasonic LSEP1287 4 blinks
Are these suitable replacements ?...Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
Yep, all shorted, no further testing. Sourcing equivalents....Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
Thanks. Sorry, I didnt read the reply before posting again...Leave a comment:
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Re: Panasonic LSEP1287 4 blinks
OK so i figured the SOS signal is coming from this chip (pin 17 /SOS4_H) ?
So what signals would generate this alarm if missing ?...Leave a comment:
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Panasonic LSEP1287 4 blinks
Hi guys, So im trying to fault find a Panasonic 42" plasma - P42x20b, the 4 blinks tells me its a power board SOS problem, caps look OK, FET's seem to test ok, I have standby voltage, I think i have 15Vdc, Then it shuts down faster than i can measure anything else, i dont really want to pay 350 for a second hand boeard, thanks in advance. -
Re: New Members - please post your introductions here
Hey guys, longtime lurker here, I am a professional Electrical engineer by day, working in the automotive industry, have been doing industrial machine electrical maintenance for 20 years now, PLc's are my forte', I have taken up fixing LCD Tv's in my spare time and have repaired about 50 ( not all at componenet level ), really need to up my skills and knowledge a bit more ( and need help with a few tricky ones), I keep ending up at Badcaps for help so i thought i might as well join and say hello :-)Leave a comment:
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