Hi all, recently my surround sound receiver went kaput on me. I checked it out and 2 of the power transistors have fried. I'm just looking to replace those transistors but am not sure where to look for them. Any suggestions on the best place to find them? It's a Sony V333ES model. It's the left front pair that blew. Thanks alot!
ok on the left one
S K
SAP15
NO (or 0 not sure)
0D11
right one
S K
SAP15
PO (or 0 again, not sure)
0022
S K
SAP15
NO (or 0 not sure)
0D11
right one
S K
SAP15
PO (or 0 again, not sure)
0022
you'll have to replace them with the exact parts - the SAP15s are 5-legged devices that combine the transistor and biasing diodes in one case.
They are manufactured by Sanken.
N is the Nchannel, P is.. obvious... 🙂
cheers
link: http://www.diyaudio.com/forums/showthread.php?threadid=2658
You can get them from Farnell, according to that link...
They are manufactured by Sanken.
N is the Nchannel, P is.. obvious... 🙂
cheers
link: http://www.diyaudio.com/forums/showthread.php?threadid=2658
You can get them from Farnell, according to that link...
Great!! Thanks clem-o. Just out of curiosity, what's the advantage of these transistors loaded with the built in biasing diode?
Oh, also. When finding these chips, do i just need to match the SAP15 number or do all have to match?
Hi,
Just specify that you need a pair, i.e. SAP15-N and SAP15-P versions and you shoudl be ok.
The built-in diodes serve to give the amplifier circuitry information regarding the temperature of the transistor. As a semiconductor changes temp, some of its characteristics change, and to keep the amplifier in "optimal" operation, circuitry must compensate.
Normally this thermal sensing is done using an external transistor or external diodes mounted as close as possible to the output transistors, but of course this gives a delayed 'sense' due to thermal lag. With the SAPxx, the thermal lag is minimized and possibly the accuracy of the temp measurement enhanced.
Cheers!
Just specify that you need a pair, i.e. SAP15-N and SAP15-P versions and you shoudl be ok.
The built-in diodes serve to give the amplifier circuitry information regarding the temperature of the transistor. As a semiconductor changes temp, some of its characteristics change, and to keep the amplifier in "optimal" operation, circuitry must compensate.
Normally this thermal sensing is done using an external transistor or external diodes mounted as close as possible to the output transistors, but of course this gives a delayed 'sense' due to thermal lag. With the SAPxx, the thermal lag is minimized and possibly the accuracy of the temp measurement enhanced.
Cheers!
you can also get them from Profusion in the U.K. -- Allegro Micro carries Sanken in the U.S. but I haven't been able to deal with them.
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