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From: N_Cook on 21 Jan 2010 04:23
No info found on these 11 pin audio output devices except
"Creative used these amplifiers in the previous generation speaker systems,
like FPS-1000 and FPS-1500."

Here used on one channel in a 2001 Cambridge soundworks desktop theater
DTT2200, other numbers on the chassis EAX CSW 4300


From: N_Cook on 21 Jan 2010 07:29
N_Cook <diverse(a)tcp.co.uk> wrote in message
news:hj96cp$ks1$1(a)news.eternal-september.org...
> No info found on these 11 pin audio output devices except
> "Creative used these amplifiers in the previous generation speaker
systems,
> like FPS-1000 and FPS-1500."
>
> Here used on one channel in a 2001 Cambridge soundworks desktop theater
> DTT2200, other numbers on the chassis EAX CSW 4300
>
>


looks like failure in data-known ICs TDA7372 or M51132, not CT1975
For 2 known good CT1975 , DC V, no load
pins 1 to 11
0.8(ch2 in), *, 0,8,0.8(ch1 in),0(gnd),8,8(op1),16 (sup), 8(op2),12.3

* is 2 V on one used as 2 separate channels
and varies (no pcb connection to that pin) 0 to 0.6V floating presumably, on
one probably set in bridge configuration driving the sub-woofer.

Anyone have a more complete pinout/full data, JIC ?


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm



From: N_Cook on 22 Jan 2010 04:05
N_Cook <diverse(a)tcp.co.uk> wrote in message
news:hj9h9o$i72$1(a)news.eternal-september.org...
> N_Cook <diverse(a)tcp.co.uk> wrote in message
> news:hj96cp$ks1$1(a)news.eternal-september.org...
> > No info found on these 11 pin audio output devices except
> > "Creative used these amplifiers in the previous generation speaker
> systems,
> > like FPS-1000 and FPS-1500."
> >
> > Here used on one channel in a 2001 Cambridge soundworks desktop theater
> > DTT2200, other numbers on the chassis EAX CSW 4300
> >
> >
>
>
> looks like failure in data-known ICs TDA7372 or M51132, not CT1975
> For 2 known good CT1975 , DC V, no load
> pins 1 to 11
> 0.8(ch2 in), *, 0,8,0.8(ch1 in),0(gnd),8,8(op1),16 (sup), 8(op2),12.3
>
> * is 2 V on one used as 2 separate channels
> and varies (no pcb connection to that pin) 0 to 0.6V floating presumably,
on
> one probably set in bridge configuration driving the sub-woofer.
>
> Anyone have a more complete pinout/full data, JIC ?
>
>
> --
> Diverse Devices, Southampton, England
> electronic hints and repair briefs , schematics/manuals list on
> http://diverse.4mg.com/index.htm
>
>
>

pin11 is standby
pin3 connected to ground

any guesses on the next 2
p7
in normal amp 100uF cap to ground
subwoofer amp 220nF to ground

p2 on the CT1975 where there is a connection to p2
100K to ground and also to the base of a TO92 via an r,

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm



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