I was driving around the other day and some idiot had a like new 42PFL5432D/37 Phillips LCD tv Sitting in his front yard by his trash can, waiting to be taken by the trash guys, I jumped out and had it in the truck within seconds, knowing how helpful you all are, there was no way i was going to pass this up! Alright, here is my issue, I have read all forums and posts on this site regarding this model, its had alot of issues, when i first got it, I plugged it in, it immediatly starting making a whistling/hissing/squealing noise, as soon as i turned tv on, the noise got louder, and was whistling pretty loudly, I replaced all the caps with axial leads (didnt have regular at the shack) but plugged back in, and was quiet for a few seconds then slowly started squealing again then got louder and louder, the buzzing noise is coming from a block type thing with yellow tape wrapped around wires, thats what it look s like to me anyways, not too sure, but could be the cap i just replaced as well, does anyone know what happens to these things or how i can fix this issue, i also noticed two diodes with a brownish color under them like they got real hot, and underneath i see a few spots where the flux melted from the solder or something because a few soldered spots have wet brownish looking liquid stuff around them, I am kinda new tho this stuff as i am sure you can tell, I have fixed about 10 of these with your help, but still learning, I want to go to school one day to do component level repairs on hospital equiptment and suchm thanks any help would be great
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
The transformer ?the buzzing noise is coming from a block type thing with yellow tape wrapped around wires -
Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
THATS what i was thinking it was called, do i replace it or just get new board or what?Comment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
The guy who put the TV out for trash isn't the only person making a mistake.
1. The power supply requires low ESR caps.
2. Radio Shack does not sell low ESR caps.
3. Don't use euphemisms. I had to reread your post three times before I realized you went to Radio Shack.
First, take an over-all picture of the back of the TV. Next, take two of the power supply - one a of the top, one of the bottom. They must be well lit, and sharp. Make sure they are at least 1000 x 1000 pixels but not over 2000.
If necessary, mark up an additional picture showing the areas where you spotted problems.
Attach teh pictures here using 'Manage Attachments' - below the text entry area.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
Will Do ASAP, Thanks for such fast response, sorry for being an idiot myself, but will get those pics uploaded asapComment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
Verify Board number! Either 715T2432-1 or 715T2432-2
Pics on the web (Discount Merchant {not an endorsement} ):
http://photos.discount-merchant.com/...itemid=1105860
Service Manual(s): --> only 2 per day
http://elektrotanya.com/?q=showresul...oria=&kat2=all
3 attached PDFs of the PSU from the 3rd download selection. Pages 52-54
Cap recommendations to follow.
Toastveritas odium paritComment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
Basic list of caps from service manual.
You supply this info please:
1) Pics that Plain Bill asked for.
2) Verification of values below
2) Dimensions in millimeters D x H
3) Manufacturer and series codes
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C907 - Mains cap, 180uF to 270uF @ 450v - Usually not necessary to replace
C921 - 100uF @ 25v
C934 - 47uF @ 25v
C946 - 2.2uF @ 50v
*C947 - 6.8uF -OR- 10uF @ 50v
C951 - 1500uF @ 35v
*C952 - 1000uF -OR- 1500uF @ 35v
*C953 - 1000uF -OR- 1500uF @ 35v
C954 - 47uF @ 35v
C955 - 2200uF @ 16v
C957 - 10uF @ 25v
C958 - 47uF @ 25v
* = Model dependent
------------------------------------------------------------------
Your looking at <$20 worth of caps from either Mouser or DigiKey. Helluva deal for curb shopping!
ToastLast edited by Toasty; 09-19-2011, 09:03 PM.veritas odium paritComment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
Progress?veritas odium paritComment
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Re: 42PFL5432D/37 Phillips LCD TV Hissing noise, Please help?
Hello all I'm looking for some help my Philips tv is chirping when I turn it on no picture or anything I took the back off I can't see anything that looks bad but I don't know anything about tv'sComment
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Hello there, got a Thinkpad E15 on the bench, almost no vital signs. Only things: Power button white LED flashes several times when USB-PD gets connected (number of flashes varies from three up to twelve times, sometimes no reaction at all). Battery charge indicator LED stays orange. Most interesting is hissing / whining sound from Battery Charge Controller IC BQ25710 on the keyboard side of the main pcb. Board fuses tested and intact, no shorts found so far. BQ25710 is also the only thing on the board to become warm in thermal image (below 70 °C). Thanks for any hint. -
Hi all,
I am working on a sound processor, it tends to overheat so I fitted a fan inside. The fan is connected to the +15V of the PSU via a DC-DC converter based on the LM2596 to reduce the voltage to around 10.5V.
Unfortunately the analogue circuitry is picking up the noise from the fan in two ways:
1. The fan is close to the analogue section, the motor itself gets into the outputs so I'll have to move it somewhere else
2. Even with the fan running outside of the case, there is still some noise which is clearly going back to the processor via power line.... -
Surprisingly enough, this receiver doesn't have the DSP chip issue. The HDMI board does not get hot, and sound over HDMI works fine.
Regardless of the input, the right channel has noise that is clearly noticeable even on average volume level. The only cases when there's no noise is when VCR input is selected (some tracks on the board are damaged, maybe that's why), or if HDMI input is selected but nothing plugged into it. In all other cases, even when no input is connected I still have the noise.
There's some logic behind it. As soon as I select an input I get only left...04-23-2025, 10:09 PM -
Hi guys
I have a DynAudio DBM50 here - it makes a loud hissing noise.
It sounds just like an FM radio with no antenna (or tuned off-station). The volume of the hissing fades up and down, sometimes drops to almost nothing then comes back loud. It occasionally makes a loud bump noise too.
It does this even with nothing connected to the audio input XLR
Any suggestions?... -
Hello
I have since a long time a Philips HTS8010S/01 which has been old but was doing the job.
Since a few days, it starts by making a weird "static" nois when switches on for a few seconds to a minute and then works like a charm.
Noise loudly outputs from the 3 channels, even if no signal is sent by the controler.DVD to the subwoofer/amp unit.
I was thinking of a soldering that was starting to be damaged and that was only doing the job after a few seconds of heating, most probbaly on the power board
Removed each of tyhe boards
...02-08-2025, 08:22 AM
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