i have a philips 32PFL5405H/12 lcd tv which the screen is flickering. i think backlight fault. anyone can help? i don`t know what to check and measure?
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Re: philips 32PFL5405H/12 lcd tv flickering screen
Pictures of the circuit boards are a good start. A video of the flickering could also help, but if not, how fast is it flickering approx? Once a second, ten times a second...?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
the chassis is chassis Q552.1E LA . the service manual can be found on elektrotanya.
i hope the pictures are OK. i made some pictures.
here is a short video of the flickering problemAttached FilesComment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
OK the 82uF 450V capacitor at bottom of power board -- measure voltage across -- what do you get? Around 380 to 400V is expected. Note if any changes occur during flickering.Last edited by tom66; 01-05-2014, 07:00 PM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
it's an unstable voltage changing between 220 and 270 VDCComment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
OK, that looks to be the fault. I would replace that, plus any small capacitors in the same area, C109 and can't see but Cxxx(?) (100uF/50V.) The 400V small one can probably be left alone. If it is not cured by those capacitors it may be PFC IC fault.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
I will replace the caps in that area. hopefully that will help.otherwise i check the pfc ic.
thanks for the help
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Re: philips 32PFL5405H/12 lcd tv flickering screen
you mean change the filter cap C607 . 82Uf 450v too?
i checked esr and capacitance of the caps, all are okayLast edited by anno; 01-08-2014, 02:38 PM.Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
Yes, I'd recommend that.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
What DC voltage do you get right at the two legs of that 82uf 450V when TV is not turn on (in standby mode)? It should be around 330VDC. (230V X 1.414). Put meter in AC Volt mode and check the AC reading on the two legs also (in standby mode also).Last edited by budm; 01-08-2014, 02:53 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
i changed the 82uf 450v cap with a 100uf 450 , C109 22uf 50v and c121 100uf 50v . but still the same problem.
i checked c104 4.7uf 50v but i checked good, not changed yet
in standby i get 324v DC and 25mv AC on the 82 uf (now 100uf) cap.
when tv is turned ON i have a ''changing'' AC voltage on the cap. on my meter (fluke) it is changing from 1 to 65volt ac.
i used min/max setting on meter. strange isn't itLast edited by anno; 01-08-2014, 03:54 PM.Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
Check R813 does it test as according to colour code? Near big cap. Also, can we have a photo of the bottom of the power board? (the green solder side.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
it's r613 and measure 0,20 ohm. the colors are red black grey (or silver) gold black. the value should be 20 X 0,01 = 0,2 ohm ? (red,black x silver)
or do i read wrong way around ? so the resistor is ok ?
the IC in the HOT area to the right is OZ9977BGN
the ic in the HOT area down is HS01G
ithe ic in the cold area is 1207A
on the other site (u101) the ic is FSQ510Attached FilesLast edited by anno; 01-08-2014, 04:18 PM.Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
Is HS01G the 8 pin chip on the bottom left of this image?
https://www.badcaps.net/forum/attach...4&d=1389219404Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
pin 8 is bottom rightComment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
Is it HS01G then? May be similar to SG6961:
If so, see if you can measure pin 8 Vcc, with black probe on negative of capacitor and red probe on pin.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
ok. i will measure. i found this http://pdf1.alldatasheet.com/datashe...ICE1HS01G.html
i dont`t thibk this is the good datasheet because ground pin don't match.
could be similair SG6961 indeed. the vcc and gnd pin match on circuit board
i measured on the cap (C104) that is connected to the vcc pin of the IC , it gives 13 volt DC
i noticed the big cap hold his charge when power cord is removed (?)Last edited by anno; 01-08-2014, 05:04 PM.Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
That is a different chip, I saw that but think the part # is a coincidence. Hmm, 13V is OK, so if all those caps did not do it, I saw some forum suggesting to replace that IC and you can buy it on eBay so I would try that.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: philips 32PFL5405H/12 lcd tv flickering screen
ok. i will order the chip and change it. thanks for the help!
so i need to buy HS01G or SG6961 ?Last edited by anno; 01-08-2014, 05:30 PM.Comment
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Re: philips 32PFL5405H/12 lcd tv flickering screen
I would try getting HS01G first, as I cannot be sure SG6561 will work, would need to confirm by getting datasheet of HS01G but cannot find one yet.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi guys,
I have this philips with this defect, I tried cleaning the flats of the t con but nothing changes, is the screen the problem??
https://streamable.com/0zl6y3 -
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