[TechAssist] Re: Apex AT2708S/CH-10C /VD873/ Z DIODE shorted, need #s
- From: Jack Latimer <jac@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 24 May 2005 10:55:14 -0400
Robert thanks for your reply. On my original post I listed the wrong diode that
I
shorted.
The correct one is VD862 that I need the ratings on and pt #.
The 16volts are there on N601.Pins 1&7 have1 volt on them.When I push mute
button
on remote pins 1&7 go to .1 volt.I can leap frog from pins 3&5 on IC N606 to
pins
3&5 on IC N601 and get sound to spkrs. that are variable with volume control and
sound is muted when I push mute on remote.
I can only handle 5 meg on e-mail & even with that I have problems at times.
Im not sure I have the resources to download from the members site.I would be
willing to try with a little instruction. Thanks again
tvservice wrote:
> Jack
> the audio ic is N601 TDA7057AQ
> look for +16 volts at pin 4 comes thru 1 ohm R637 from source diode VD872
> #2czru4z on power board with R872 point27 ohm fusable resistor.
> Mute is pin 1 and 7 thru R630 to collector of V631 2sc1815
>
> hth
> if you need schematic its about 10 meg I can send to you
> or upload to member site
>
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message -----
> From: "Jack Latimer" <jac@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, May 23, 2005 3:45 PM
> Subject: [TechAssist] Apex AT2708S/CH-10C /VD873/ Z DIODE shorted, need #s
>
> > I beleive i shorted diode this during the initial troubleshooting i
> > did. #s on diode are 25c6.
> > This may not be the correct sequence.I am using a 5.6 v zener and set is
> > operating
> > in all ways except sound is muted. I have spent a lot of time working on
> > set without
> > a schematic.When i got set in every time i got it to power up it would
> > act up in a different
> > way and the 5v supplys are solid.At that time i had sound. I was testing
> > for the 5v going
> > to the control pad .It was there and i momentarially shorted it to
> > ground. The set shut down & ever since i did that ,set powers up and all
> > symptons are gone except now there
> > is no sound to spkrs.Using signal tracer i am picking up sound at
> > various points.Snd
> > output seems to be ok.I am picking up sound at ic n606 .I am scratching
> > my head at
> > this time so i thought i would send this off to see if i could get some
> > imput before i get
> > back to work on it.
> > Here hoping with Thanks
> >
> > Jack Latimer
> > Jack's TV
> > Cahokia , IL.
> > jac@xxxxxxxxxxx
> >
> >
> >
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