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"Junction test the transiters" |
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"Just ohm the burnt resistors, and replace". |
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"Junction test the transistors and replace the bad one(s) or shotgun all of them". |
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"Check the i/o caps, or shotgun them". |
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"Put an AC voltmeter on pins 1 and 7 of the op amps and see if you have signal. If you do, look at both sides of the output caps. Compare left channel w/ right to see what's supposed to be there." |
Sahib wrote on Wed, 06 October 2004 17:57 |
CKerian, I hope you will not be offended by this but this is not the forum that you should be writing with this sort of problems. |
danlavry wrote on Fri, 01 October 2004 20:40 |
This forum is about the why and how of audio technology. It is about the electronic and electromechanical bridge between musician and listener. ....The goal of this forum is to improve our technical understanding, which also helps achieve better end results. ...The majority of "ear types" are not well equipped with science, engineering and math which are the foundations of audio technology. The majority of "technical types" lack studio experience. The challenge here is to communicate with people with wide range of interests and experiences. That and being objective requires care and cooperation from all participants. |
CKerian wrote on Thu, 07 October 2004 16:00 |
hey Shaib. it's cool. I wasnt really sure. and thank you Will, well said IMHO. In hindsight, I think it is the wrong forum. i saw the title "theory to practice" and thought.. cool a electrical forum for maybe beginners or something. dont we always bitch that most AE's dont know enough about the electrical engineering aspect of recording? I knew it was the wrong place as soon as I noticed a lack of interest. it's all cool. Issue resolved. junction test failed on a transister. |
Sahib wrote on Thu, 07 October 2004 02:54 |
my brother ( Barish ) already replied to it. Regards, Cemal Ozturk |
Barish wrote on Mon, 11 October 2004 15:17 | ||||
For those who feel themself too lazy to be bothered with good old fashion way of testing transistors, there is a doc's pager sized mini test device called Atlas DCA-55 Semiconductor Component Analyser from a UK company called Peak Electronics. It costs Post by: bobkatz on October 12, 2004, 06:08:02 PM Wonder how it will do with a transistor that's in circuit... BK Post by: Seeker-Ian on October 13, 2004, 12:01:59 PM BTW Bob.. i enjoyed your book. very nice and worth every penny. an update on my problem... I replaced the transisters for this section of my mix bus and it returned my volume on the right mix bus but.. the distortion is still there. getting closer. next step is the caps though they all look new. ideas? Post by: Sahib on October 13, 2004, 02:48:47 PM
Bob, Unfortunately it does not measure on the circuit. But it is still a great device. There is another version available from the same company which tests LCR. Cemal Post by: Barish on October 13, 2004, 06:36:06 PM
Hi Bob, As Sahib and the user manual of Atlas said, "it is designed to test discrete, unconnected, unpowered semiconductor components". An FAQ document is available on the product page on their website (or alternatively here). I'm not aware of a tester that is capable of measuring components connected on the board without getting confused by the rest of the circuit. Regards, Mahcem Post by: OOF! on October 13, 2004, 07:02:05 PM this is the perfect forum for this question. i've learned so much from these guys. additionally, everything you need to know can be found on the web. search under various words and you'll get all the instruction you need. i couldn't believe all the useful info i got and it put me on the way to learning this stuff. here are a few of the more useful links i found. http://www.doctronics.co.uk/scope.html http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/oscillo scope.html http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/termino logy.html http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/setting .html http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/control s.html http://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/meastec h.html also, get yourself a tektronics scope on ebay. they're invaluable- around 250 bucks. good luck, david lawrence OOF! |