Re: Amplifier Problem - Revised Schematic

"Gareth Magennis" <sound.service@[EMAIL PROTECTED]
> wrote in message 
news:lyhPj.444$244.4@[EMAIL PROTECTED]
>
> "EADGBE" <hwbosshoss@[EMAIL PROTECTED]
> wrote in message 
>
news:7a5f62ce-00ec-4fac-84f3-838743faa613@[EMAIL PROTECTED]
>> In the interest of clarification, I have added some information to the
>> schematic of the tape deck headphone amp that I'm having problems
>> with.
>>
>> Some circuit paths are now labeled:
>>
>> http://i240.photobucket.com/albums/ff58/eadgbe123/amplifier-1.jpg
>>
>> As always, the points at which voltage readings are marked with a star
>> are NOT producing the voltage indicated.  The +7V location is
>> measuring 131mV instead.  The other two points where a star is
>> indicated are measuring between 20mV and 30mV (fluctuating slightly).
>>
>> I am starting to think that a circuit OUTSIDE of this circuit might be
>> at fault, because NOTHING inside of this circuit seems to be
>> faulty...but the darn thing still WILL NOT work.
>
>
>
>
> Make sure your transistors are oriented the right way round, i.e. B,C &
E 
> really are where you think they are.  I remember once being stuck with a

> repair where the lead out of a replacement transistor was not the same
as 
> the original.  Couldn't work out what the hell was going on for quite a 
> while, but C and E were reversed.  (don't just use a diode check for
this)
>
> Gareth.
>
>


As an example:   BC184 and BC184L have different pinouts.



Gareth.