Philips 42PFL9703D/10 failing to powering up.

[Dang]

I have just got the above Tv for £20, a bit of a bargain if you ask me, when I bought it I was told that it wouldn't start up, upon getting it home indeed it has a start up issue but after a few attempts it would power up, everything looks fine, screen is good, all menus, remote etc work. So I decided to move it to a position where I could view it properly and unfortunately from that point on it won't power up at all, all you get is the white flashing start up light and then nothing.

I have had a look at the PSU and nothing seems bad, I've tried gently heating components and nothing reacts, I've reflowed a few solder connections and still nothing, the only source of real information I've found on this issue is this: https://www.badcaps.net/forum/showthread.php?t=27208. Within the thread there is talk of two small blue capacitors in the standby circuit that need replacing, I've tried measuring them but get no response in both directions, is this normal? is there anything else that could contribute to this issue? thanks, Andy.

[dj_ricoh]

Re: Philips 42PFL9703D/10 failing to powering up.

Take it down and test it like that.

Even in ohm set shows value, diode mode, but the best is uF

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

OK, so in the diode mode with the DMM I've tested other types of these capacitors and I'm finding the same thing, nothing shows up on the meter so I think this is perfectly normal, I could be wrong of course so next thing to do is just change them out anyway as per service manual, I have to ask though, can I get away with changing any of the values, so 305v for say a 620v? or a 68uf in place of the 47uf? thanks, Andy.

[newtothis]

Re: Philips 42PFL9703D/10 failing to powering up.

Can change to higher voltage but keep uF the same

[selldoor]

Re: Philips 42PFL9703D/10 failing to powering up.

Can change to higher voltage but keep uF the same

Slightly higher voltage - but often you are limited by physical size.
it is usually ok to go one step higher uf as well.

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

Hi again, I have found these: http://www.ebay.co.uk/itm/371303831422, are they OK to use to replace the larger one with, a slightly different part number?

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

To answer my own question, it seems the "1" and "2" denote lead spacing, what I want is 10mm, the above component is 15mm.

[tw2005]

Re: Philips 42PFL9703D/10 failing to powering up.

I'm having trouble working out what exactly is being replaced, specs etc, I see no pics but are these any good?

http://uk.rs-online.com/web/c/passiv...4&m=1&aaaExp=Y

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

I'm having trouble working out what exactly is being replaced, specs etc, I see no pics but are these any good?

http://uk.rs-online.com/web/c/passiv...4&m=1&aaaExp=Y

Sorry, I've been referring back to the service manual but for clarity, there are two suppression capacitors in the standby circuit that can cause this start up issue, they are at positions 2165 and 2179 https://www.badcaps.net/forum/attach...1&d=1363748752, one is rated at 22nf 305vac and the other 100nf 305vac, both need to be changed to B32921C3473M and B32921C3104M respectively, these I've now ordered. The numbers I mention are for the sixth digit along, 1 looks like it means for 10mm, 2 for 15mm. I hope this clarify's it some and thanks for the help with the parts.

[tw2005]

Re: Philips 42PFL9703D/10 failing to powering up.

Sorry, I've been referring back to the service manual but for clarity, there are two suppression capacitors in the standby circuit that can cause this start up issue, they are at positions 2165 and 2179 https://www.badcaps.net/forum/attach...1&d=1363748752, one is rated at 22nf 305vac and the other 100nf 305vac, both need to be changed to B32921C3473M and B32921C3104M respectively, these I've now ordered. The numbers I mention are for the sixth digit along, 1 looks like it means for 10mm, 2 for 15mm. I hope this clarify's it some and thanks for the help with the parts.

nevermind, if you solved the problem that's good.

[Moreno83]

Re: Philips 42PFL9703D/10 failing to powering up.

What are the exact values that need to be replaced? 47NF/305v & 100NF/305v?

[budm]

Re: Philips 42PFL9703D/10 failing to powering up.

See the notes:
https://www.badcaps.net/forum/attach...1&d=1363748752

You can use higher Voltage also, but not lower.

BTW, they are not suppression caps, the caps are for dropping the line Voltage instead of using resistor to lower Voltage.

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

See the notes:
https://www.badcaps.net/forum/attach...1&d=1363748752

You can use higher Voltage also, but not lower.

BTW, they are not suppression caps, the caps are for dropping the line Voltage instead of using resistor to lower Voltage.

Oh right, I was going by their description from where I bought them, the model number is correct so hopefully tomorrow they'll come and I'll be able to get this Tv working once more, thanks.

[Dang]

Re: Philips 42PFL9703D/10 failing to powering up.

Hi again, the offending parts have now been changed and all seems well, it does seem to take a few more seconds than maybe it should for it to turn on properly so maybe some other caps may need changing but it works, that's the main thing so once again thanks to Badcaps, I wouldn't know where to start with out this place.

[Moreno83]

Re: Philips 42PFL9703D/10 failing to powering up.

Good thing you fixed the tv.

Can it not be just the 2200UF caps that are failing?