You don't mention a thing about the type of transistor?
Nothing about the multimeter used for this?

I check transistor in circuit all the time, you just have to know what is in
parallel and in series with the junction that you are reading.

I used to be good with the old Simpson 335 analog meter, one had to figure
out that the red/black leads didn't mean negative/positive since the voltage
coming out was reversed also you could ony check transistor on the ( X1)
scale since that was only scale that was providing enough DC voltage to go
over that diode/transitor barrier ( 0.7 Vdc about).

In any case with the new multimeter most have a diode checking position,
much easier, just a metter of finding the Base if it isn't maked, it is the
one common to both junction and if the test lead is negative, then it is a
PNP transistor and vice versa if the common lead is positive.

Anyway a lot of blah blah, what is important is look at the circuit and
figure out what is around it that could affect your meter reading. If the
resistance is lower than your junction (0.7 VDC) then one has to remove
from the circuit in order to be sure.
Or else just disolder that lead that you want to test.

Good luck

I am sure that lots of other techies have different ways of doing things



"SeventhPrince???" wrote in message
oups.com...
Hi,

Any advice on how come when a particular transistor when soldered gives
out different readings as compared to when it has been desoldered and
taken out.

When desoldered and taken out from pcb, gives good readings indicating
the transistor is good. However when on board, it gives inconsistent
readings showing the transistor is bad.

End of day, is the transistor good or bad? Thanks.

Am using analog multimeter under the diode function for checking on
transistors.Thanks.

SeventhPrince???