Last month my Technika 22” LCD TV died. I could not get past the red power LED. Having read several articles on this forum I decided to have a go at repairing it. Lo and behold 2 capacitors on the power board were obviously domed, so I procured their Panasonic FM equivalents and replace them (2 x 1000uF, 16V caps). Put everything back together and the TV has been working ok since.
I have since completed another repair on a Philips PHP-X19 monitor, which took much longer (see post [url]https://www.badcaps.net/forum/showthread.php?t=18493&highlight=php-x19[/url]).
I did...
roobarbthedog
Member
Last Activity: 03-16-2012, 10:28 AM
Joined: 01-10-2012
Location: Scotland
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Re: Philips PHP-X19 2 seconds to black problems
Woo Hoo! New CCFLs installed and I've had a bright stable image for over an hour now! Luckily the CCFLs came installed in a metal strip enclosure (2 tubes in each strip), already wired up ready to be plugged in.
Before installing I checked them out by plugging them into the inverter board. Nice bright light on both set of dual tube assemblies. Getting them attached to the diffuser was a bit of a pain, but I eventually got there. Reassembled the panel and ran a quick image test ok before rebuilding the rest of the monitor.... -
Re: Philips PHP-X19 2 seconds to black problems
2 nice shiny new dual CCFL assemblies arrived today (bought on Monday on eBay so that was quick). Hopefully I'll get to fit these tonight.
updates later.Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
I've found some replacement dual tube assemblies on ebay and will hopefully get these delivered in a couple of days. I'll post an update later in the week.
Cheers
RoobarbLeave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
I've now changed all the capacitors to the same rating Panasonics (FM series, except for one FC). I managed to get a picture for 10 seconds before the usual "2 seconds to black" problems started again. The tubes do look blackened at the ends and have a slight pink glow. It's now getting to the point where I need to decide if it is cost effective to continue.
One thing I did notice is that when I did a multi meter continuity test on some of the connections on the board, mosts points highlighted in the attached...Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
That was me being impatient. Maplin was open on a Sunday. I should have waited until Monday for RS Components. It will not cost much to replace the rest of the caps with Panasonics and to swap out the two from Maplin. I'll do this tomorrow.Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
I have the blackened ends on the some of the tubes. When they are on they are slightly pink, but not as bad as the ones in the photo link.
Here's a question - there are 2 tubes in each assembly, and there are 2 sets of wires (a white/black pair and a pink/white pair). Can I plug one set of wires in to light up just one tube or do both tubes need connected at the same time?Last edited by roobarbthedog; 01-17-2012, 05:05 AM.Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
Ok. The monitor has 2 CCFL assemblies, each with 2 tubes. One assembly at the top of the screen, one at the bottom. I could get the top one out ok, but the bottom one is tricky. Anyway, each assembly has has set of White/Black and Pink/White wires, plugging into the Inverter / Power board. I sat the top CCFL assembly outside the monitor casing and plugged the various connectors back together. I used a laptop and VGA cable as an input source.
First test had both CCFL assemblies connected up. The upper unit had a slight...Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
I've got a switched / surge protected strip to use. A possible daft question, but given that the monitor is stripped down, how much do I need to reconnect in order to test the tubes? The tube assembly cables have a decent length and could be plugged into their connectors and sat outside the monitor assembly. This also means I don't have to touch anything when I switch it on! If I connect everything up it is awkward trying to get access and see what is happening.Last edited by roobarbthedog; 01-16-2012, 06:52 AM.Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
PlainBill, ok I'll give it a go tonight and hopefully won't fry myself in the process!Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
Tom,
I've only replaced 2x470uF caps (these were bulging slightly at the top) and the 4x680uF caps (looked ok but I don't have an ESR meter to test). I found the same monitor on a different post and the other caps should be:
4 x 680uf 25v
2 x 470uf 25v
3 x 220uf 25v
1 x 10uf 50v
1 x 22uf 50v
I suppose I could replace the others before going any further as this is a relatively cheap fix, although I'll have plenty of spare caps as RS sell in packs of 5. Maplin do sell some...Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
Sabre - thanks for the suggestion. The board on the reverse of these components looks slightly scorched. I'm hoping it is not the lamps as this makes the job expensive and probably not cost effictive. I'll try the lamp test later and see if I can rule them out.Leave a comment:
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Re: Philips PHP-X19 2 seconds to black problems
Costs so far are about 4GBP for parts (probably cost more in petrol driving to Maplin and RS!!!).Leave a comment:
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Philips PHP-X19 2 seconds to black problems
Philips PHP-X19 monitor Problems.
Ok, here goes. I've got a Philips PHP-X19 monitor that my son uses for his PC. We've had it for at least 5 years, and it does get used a lot and I'm forever telling him to switch the PC off when not in use (incidentally, the power supply on the PC fried last year and had to be replaced).
Anyway, a couple of weeks ago the monitor started experiencing the “2 seconds to Black” problems. I've been doing some internet searches and I've found some useful articles on this forum. Coincidentally my Technika 22” TV/DVD had also gone kaput... -
Re: New Members - please post your introductions here
Hi, I'm Paul from Glasgow, Scotland. I've got a bit of an electronics background, long forgotten, but memories flooding back! Just last week I managed to get a Technika 22" LCD TV working - a couple of popped caps on the power board. Saved me buying a new TV. Working on a Philips monitor now and will post an appropriate thread for this.Leave a comment:
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