Hi all i am new to amp diy etc so trying to fix a few amps i use an atlas semiconductor to test transistors etc but my latest project has
philips TDA1514A where i would expect to see the output transistors they have 9 pins not the 3 i am used to testing
can anyone point me in the right direction to how i go about testing these
thanks
mark..
philips TDA1514A where i would expect to see the output transistors they have 9 pins not the 3 i am used to testing
can anyone point me in the right direction to how i go about testing these
thanks
mark..
Hi ok
i was testing for voltages on pins black probe of dmm on chassis was not really getting very good readings when a bit of a pop smoke and 2 blown fuses dont know if i shorted 2 pins or not (i was being very careful i thought)
But looking at amp it seems much more simple than others i have succesfully repaired it seems the mains power go,s to transformer but i cant see what changes the voltage to dc no bridge rectifiers
i will try and post a photo ..A1.JPG - download now for free. File sharing. Software file sharing. Free file hosting. File upload. FileFactory.com
i was testing for voltages on pins black probe of dmm on chassis was not really getting very good readings when a bit of a pop smoke and 2 blown fuses dont know if i shorted 2 pins or not (i was being very careful i thought)
But looking at amp it seems much more simple than others i have succesfully repaired it seems the mains power go,s to transformer but i cant see what changes the voltage to dc no bridge rectifiers
i will try and post a photo ..A1.JPG - download now for free. File sharing. Software file sharing. Free file hosting. File upload. FileFactory.com
Last edited:
I remember an amplifier I built with those Philips ICs ,as per datasheet .PSU was given by a 19+19 V ,60 W trafo (a little bit underpowered ).
The sound was standard ,having some roughness around 700Hz-1 KHz which made me dislike them .
Remember that the back is connected to V+ (or V- ) which may
be a killer if heatsink is grounded and the ICs not isolated.
The sound was standard ,having some roughness around 700Hz-1 KHz which made me dislike them .
Remember that the back is connected to V+ (or V- ) which may
be a killer if heatsink is grounded and the ICs not isolated.
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