Hi Daniel,
Just wanted to clarify something. Looking at the transistor, sloped face
towards you, is the reverse of what you see in the schematic. So the
left-hand base physically is the right hand one on the diagram. I have some
further readings for you as the emitter voltages don¹t look quite right.
Here are some voltages to compare from a working circuit:
This time looking from the front of T3, sloped face towards you ,working on
all 5 pins left to right.
Pin 1: fixed 5.0v
Pin 2: -13.95v to 3.5v (0 10 on MG freq)
Pin 3: 5.4v to 5.6v (0 10 on MG freq). This centre pin is the emitter and
this should also alter in voltage as you adjust VR5
Pin 4: Fixed 5.0v
Pin 5: 4.7 to 4.9 as above.
BTW Have you noticed the transistor is symmetrical? You can solder it in
either way!
So, as you can see. Pin 16, IC21 should fluctuate quite a bit depending on
the MG freq. setting. Sorry I am not getting to the bottom of this for you.
This remote diagnostic business is pretty difficult at the best of times.
Let me know what you find.
Cheers,
Andy
On 13/09/2010 18:40, "Daniel A" <
apophis93@yahoo.com> wrote
>
> Andy,
>
> Here are the readings for T3
>
> With Freq set to 0 the left Base (pin1) reads at approx +4.95v
> With Freq set to 10 the left Base (pin1) reads at approx +4.95v (ie.. no
> change)
>
> With VR5 fully counter clockwise the Emmitter (pin3) is reading at a slightly
> higher voltage then the base I would say approx +5.2v
> And I get the same exact reading when I rotate VR5 fully clockwise.
>
> I did do a reading on pin 16 of IC21 and I am getting -15v
>
> - Daniel
>
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