Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!haven!purdue!decwrl!sun!pitstop!sundc!seismo!uunet!portal!cup.portal.com!Dick
From: Dick@cup.portal.com (dick a wotiz)
Newsgroups: sci.electronics
Subject: Re: Where can I find transistor BU508D?
Message-ID: <14390@cup.portal.com>
Date: 7 Feb 89 20:46:53 GMT
References: <49876@yale-celray.yale.UUCP>
Distribution: usa
Organization: The Portal System (TM)
Lines: 23

sun@venus.ycc.yale.edu writes:

	> I am trying to fix my Kawasho Model 3713 Monitor style color TV set
> and diagnosed that a transistor (Q405 on the schematic diagram) is burned
> out. The part number listed on the schematic diagram is BU508D and the
> label on the transistor has the words D1439/65. Does anybody know where I
> can buy this transistor.

Most Japanese transistors I've seen use a numbering system that
starts with a single letter A-D and a few numbers.  The actual part
number is '2S' followed by whatever is marked on the transistor.
For example, the part number you should look for is 2SD1439/65.
For some reason, they never put the '2S' on the package.

As far as I've seen, 2SA and 2SB parts are PNP, while 2SC and 2SD are NPN.
(Someone prove me wrong on that one...)

My RCA SK book lists the 2SD1439 as an NPN horizontal deflection
transistor with built-in damper diode, RCA substitute # SK9422.
That should be a bit easier to find than the original part!

Dick Wotiz                                dick@portal.com
                            {uunet|sun|atari}!portal!dick