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From: b on 1 Dec 2009 09:05
On 1 dic, 12:30, Franc Zabkar <fzab...(a)iinternode.on.net> wrote:
> On Sun, 29 Nov 2009 09:58:52 -0800 (PST), b
> <reverend_rog...(a)yahoo.com> put finger to keyboard and composed:
>
> > I am currently trying to upload the
> >> extract form the schematic, will post link here when I do.
>
> >see here
> >http://www.filefactory.com/file/a1fbe5d/n/ELBE_E14_vert.jpg
>
> Have you changed the electrolytic capacitor on the 25V rail near the
> FBT???


yeah, c427 1000uF. Picture still distorted.
I think I will just take a chance and change the IC again.
-B
From: Franc Zabkar on 1 Dec 2009 15:45
On Tue, 1 Dec 2009 06:05:54 -0800 (PST), b <reverend_rogers(a)yahoo.com>
put finger to keyboard and composed:

>On 1 dic, 12:30, Franc Zabkar <fzab...(a)iinternode.on.net> wrote:
>> On Sun, 29 Nov 2009 09:58:52 -0800 (PST), b
>> <reverend_rog...(a)yahoo.com> put finger to keyboard and composed:
>>
>> > I am currently trying to upload the
>> >> extract form the schematic, will post link here when I do.
>>
>> >see here
>> >http://www.filefactory.com/file/a1fbe5d/n/ELBE_E14_vert.jpg
>>
>> Have you changed the electrolytic capacitor on the 25V rail near the
>> FBT???
>
>
>yeah, c427 1000uF. Picture still distorted.
>I think I will just take a chance and change the IC again.
>-B

Why not break out the oscilloscope and take some measurements?

I'd look at the input at R303 (not IC pin 1), and I'd compare it
against the signal at the current sense resistor, R310. AFAICT, both
should be sawtooths (sawteeth?).

BTW, I believe R310 should be a 1R5 resistor, not 1M5 as shown in the
diagram.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
From: b on 11 Dec 2009 07:38
On 1 dic, 21:45, Franc Zabkar <fzab...(a)iinternode.on.net> wrote:
> On Tue, 1 Dec 2009 06:05:54 -0800 (PST), b <reverend_rog...(a)yahoo.com>
> put finger to keyboard and composed:
>
>
>
> >On 1 dic, 12:30, Franc Zabkar <fzab...(a)iinternode.on.net> wrote:
> >> On Sun, 29 Nov 2009 09:58:52 -0800 (PST), b
> >> <reverend_rog...(a)yahoo.com> put finger to keyboard and composed:
>
> >> > I am currently trying to upload the
> >> >> extract form the schematic, will post link here when I do.
>
> >> >see here
> >> >http://www.filefactory.com/file/a1fbe5d/n/ELBE_E14_vert.jpg
>
> >> Have you changed the electrolytic capacitor on the 25V rail near the
> >> FBT???
>
> >yeah, c427 1000uF. Picture still distorted.
> >I think I will just take a chance and change the IC again.
> >-B
>
> Why not break out the oscilloscope and take some measurements?
>
> I'd look at the input at R303 (not IC pin 1), and I'd compare it
> against the signal at the current sense resistor, R310. AFAICT, both
> should be sawtooths (sawteeth?).
>
> BTW, I believe R310 should be a 1R5 resistor, not 1M5 as shown in the
> diagram.
>
> - Franc Zabkar
> --
> Please remove one 'i' from my address when replying by email.

don't have a scope here (yet) so can't do much else.
today I changed the IC again and was rewarded with the horizontal
line. I don't understand why the original IC produces at least a
distorted pic but no replacement has produced anything.
In ahy case I'm losing patience with this set and have other things
piling up, so I suppose it's time to dump it
thanks all
B
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