Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Err, yea like an Audi Q7 looks like a Q5 if you take a few paces back.
they [the boards] were clearly designed by the same people.
water looks identical to vodka.... i could go on...
QuantumCheese
Member
Last Activity: 10-28-2012, 07:37 AM
Joined: 01-21-2012
Location: Cambridgeshire
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Thanks, but i'm not sure how applicable that is to this fault. That PSU's of a completely different design, though mine does seem to feature a similar device in a similar location, it's not suffering a similar fault to that thread....Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
one was 0.3 and the other was 0.7 ohms as measured with an PEAK Atlas ESR70....Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Both measure well within spec.
Their are two caps on the psu board that are a bit close to the limit.
1- 120uF 450V on front end, measures at 110uF
2- 470uf 35v filters Vp (i think) measures at ~420uF
Neither of the above seem hugely significant, unless i'm missing a function of Vp, i believe it's only used to drive the audio amp,
Also and theirs no squealing audible at the front end, usual when the primary reservoir is duff
I still think the fault lies...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
My Apologies, they are there after all.
What i'm failing to understand here is why your suggesting i check these components. If they were bad, the supply would not start. if the supply did not start i would be hard pushed to have verified the outputs on a scope already?
a few posts back when i said "The same damn fault as before", that included being able to hot-wire the backlight into firing up, again a difficult thing to do if the supply board is not working?...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
and anyway if the psu fires up & the outputs are all nob on, why am i looking for a cap on the psu board?Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
are they on the underside? the schematics available through electrotanya seem to omit the 32" supply board?Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Are we at crossed purposes here?
I don't see either of those references on the psu board. the other boards all have 4 digit designators...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
No! it's got just as much logic behind it as the can freezer spray i have, i've just never come across it before!...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
can you be a little more specific please?
the psu board has 4 supplies ranging from 24V to 3v3,
the SSB board (which features "a contoller" or Hercules according to the service man) about 5 (supplies) i think, and the IBO board another 5 or 6.
"~10-100uF 16-50V" is pretty vague for supplies ranging from 24V to 1V2 wouldn't you say!...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
I Am!
I haven't tried the tapping with a tooth brush technique yet but at this rate it's on the cards.
I've never used a hairdryer
But i have cooked a pcb in the oven (domestic) to resurrect it once, i guess that's just as desperate!
presumably in "startup cap" you are talking about the primary reservoir cap on the hot-side of the supply? I've had that out & measured it along with most of the secondary caps too. they all measure good annoyingly!
Cheers!...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Well now i'm annoyed!
I bought a replacement SSB. fitted it and the set sprang to life. Great.
For various complex reasons i didn't have the correct remote, so bought a universal one.
Two days later, the set has been lying on it's back, un plugged, awaiting a remote.
I stand it up, plug it in and what do you think happens?
The same damn fault as before. GRRRR.
I'm thinking i didn't need the SSB after all, and i still have a dry joint/flaky component somewhere but i'm...Leave a comment:
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Re: No power on a Acer AL1916
Once again this site come up trumps
I have a pair of these and a couple of days ago, the right-hand one started power-cycling itself. which was an inconvenience to say the least as i had a schematic spread across both and half of it kept vanishing!
Anyway, the caps looks ok, it took a few out & measured them, again OK. I thought the 12V had quite a lot of switcher noise on it ~0.1V p-p so I’ll bet a cap is going to go soon.
Apart from that I couldn't really find anything obviously wrong and the power-cycling...Last edited by QuantumCheese; 04-07-2012, 08:21 AM.Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
After a fair bit of fuming, i can confirm the backlight works(some good news then).
I tried to 'prod' it into service mode by shorting two jumpers on the main board. absolutely no effect. not even the led flash codes.
I've found someone selling the main (video driving) board for about 35quid, what do your think.....worth a punt?...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
update -
I think realistically i only delayed it's journey to the skip, I just can't find anything wrong! it think it must be a logic issue. apart from an a to d chip getting a little warm in one corner i'm completely out of ideas (and i can't find a source for the chip even if i was fancying replacing a really tight pitch 80 pin job)
before i skip it does anyone want to baggsy any bits?Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
I don't think so, it's not a pattern that repeats.
1 blink would equate to "Mis-match of TV (Hercules) SW and Scaler SW", however that should also be available via the on-screen error readout so the screen not working would indicate otherwise?...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
hay ho, what was wrong with your set in the end?...Last edited by QuantumCheese; 03-18-2012, 09:17 AM.Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Update
I've prodded my way round the "IBO Zapper" board (to the right of picture) and all of the supplies generated on that board measure OK
I think i've found all the supplies generated on the "SSB" board and they look fine & dandy too.
Hmmmmm.Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Sort of.... According to the manual i have Vstby = 3.3?
anyway, i looked at with a scope, the following and they are all 'clean' and measured as follows-
Vp = 24V, Vstby = 3.3, 12V = 12V.
I think 5v is generated on the SSB board (green one bottom middle in picture) and when the set is'on' it measures at 5V and looks clean.
And thanks, I couldn't resist a nice Fluke having been stuck with Maplin-esk rubbish for so long!...Leave a comment:
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Re: Philips 32PF5521D/10 Stuck in Standby Sortof
Do you mean the SCART cable?
I know it's a bit old-skool but i was hoping it would auto switch from tv to that i/p and i could see if anything was working. as it is, the tv channels in my region are now all digital (no analogue) and it needs re-tuning......tricky thing to do without a picture
...
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