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Toa PA amp TA266 with open circuit transistor marked 536F9. I think this number is a part number and not a transistor number. Can you help with an equivalent transistor, Thank you, Doug Cooke

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  • stanley386 Jun 01, 2009

    Dear Sir, There is no way in the world that you can come up with a solution this quick.Your answer is basic component teaching and has nothing to do with the problem. Please read the question, you have obviously sent me an auto generated computer answer or from someone sitting at a computer that hasn't got a clue. At least forward my query to a technician as I am sure that you can do a lot better than this, thank you.

  • stanley386 Jun 01, 2009

    Many thanks for your prompt reply and interest, there are two boards in the amp, this transistor is in the first one which looks like a signal or pre amp and the second is a power amp. This a pretty old amp and numbers hard to read,the board number is 101408012 or 101468012. The 536F9 is the only number on the transistor. Circuits are probably non existent but if you can find something in the old 30watt TOA range it may do the job. Your time much appreciated, Doug.

  • stanley386 Jun 02, 2009

    Once again you have not addressed the problem, I have my doubts if anyone at Fixya has even read the query. Seems to me you are just computer generating answers, avoiding the issue and sending me irrelavent answers. If you do not have knowledgable staff and cannot help please say so. Please no more mindless compuer generated solutions, ask a technician!

  • stanley386 Jun 03, 2009

    If I knew the manufacturer of the transistor I wouldn't have a problem! Can you source a circuit for a TA266 Toa amp and have a look in the pre amp section. There are only 5 trannies in there, two have proper transistor numbers and three have these part numbers. Support from Toa would be the way to go but I don't know how to get on to them, especially in this neck of the woods. Thanks for your help.

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  • Master
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Hi, the 536F9 was a branded part of CMB Components. I still have the following US telephone numbers:
OEM Division Tel:(631)244-2700 Fax:(631)244-2745 | Broker Division Tel:(631)244-9800 Fax:(631)244-9811

You could order it here, but there is a minimum $ order.

Here is a datasheet of an possibly equivalent part from FILTRAN:
http://pdf1.alldatasheet.com/datasheet-pdf/view/169460/FILTRAN/1536F.html

Hope that helped.


Posted on Jun 03, 2009

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I need to know the manufacturer of the transitor so that I can find an equivalent

Posted on Jun 02, 2009

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  • Master
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Hi there,

Transistors can be identified by a Joint Army-Navy (JAN) designation printed directly on the case of the transistor. The marking scheme explained earlier for diodes is also used for transistor identification. The first number indicates the number of junctions. The letter "N" following the first number tells us that the component is a semiconductor. And, the 2- or 3-digit number following the N is the manufacturer's identification number. If the last number is followed by a letter, it indicates a later, improved version of the device. For example, a semiconductor designated as type 2N130A signifies a three-element transistor of semiconductor material that is an improved version of type 130:

As you are the one who can see the circuit, try to read and determine what exact # of the transistor

Let me know

Posted on Jun 01, 2009

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  • micromaster
    micromaster Jun 01, 2009

    can you please send me out the exact part# of the mainboard. i was instructing you to feed me in general the number or what you can see that labeled the transistor you were gonna replace. well i am here and you are there, i cannot actually determined which transistor your referring.

  • micromaster
    micromaster Jun 01, 2009

    here is the example part# and description for each resistor. can you identify which it is?

  • micromaster
    micromaster Jun 01, 2009

    also try to look at this one HERE

    Update me again


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Can you post the markings on the existing transistors? Also, if these are the output transistors, there shouldbe a complimentary one located close by Q24+Q34 maybe? Post those markings too.

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