You can use signal tracers (such as dual trace. Descargar Hhack Aptoide. SERVICING TECHNIQUES FOR. By the tube substitution method. You replace the tube. How to solve systems with substitution pdf download. Repair Manual Pdf 2007 2008 Applied Digital Signal Processing. Service repair maintenance manual. 1 TROUBLESHOOTING RECEIVERS The four methods of troubleshooting are: 1. Circuit Disturbance 2. Signal Substitution 3. Signal Tracing 4. Measurement of Circuit Parameters.

One of the fun things about this hobby is picking up test equipment that you don't necessarily need. I picked up a Heathkit T-4, in working condition, though I will do a recap. I have it's manual, and a copy of an Eico 147 manual, and between the two manuals I have a good idea of how to use the T-4 I came across 'Servicing by Signal Tracing' by John Rider from a few sellers on eBay, ranging from 8 to 10 bucks for CD's. Pretty short money, but at the same time why spend the money if the manuals that I have are enough. In fact, the operation text or some of it in the T-4 manual is an excerpt from the Rider book.

Thoughts, is the book worth getting? Russ _________________ A place for everything, everything in it's place. I just don't remember where all those places are. Depends on your trouble shooting style. I don't do signal tracing--- the only time I put in a signal is for alignment. Actually, not quite true.

I always start at the back-- the audio output stage-- and work forward. Check for the right voltages and currents first, and then look for a response. The only 'signal injection' is a finger or a test lead touching a grid.** **isn't that why all low-level tubes had grid caps?. _________________ -Mark 'It's always something'. --Gilda Radner (1946 - 1989). Electronic devices like radios can develop a multitude of problems, so it is helpful to have a few different methods of troubleshooting.

Voltage checks, resistance measurements, signal injecting, and signal tracing are all legitimate methods. Each one has its strong points and its weak points. With a little experience and practice, you'll know which one to use in any particular situation. Signal tracing is best when you are confronted with a radio in which all voltages and resistances look normal, but there's nothing coming out of the speaker or the sound is distorted. There are innumerable radio textbooks and manuals out there that explain how signal tracers are used.

Rider was an excellent author so his book would be as good as any. _________________ 'Hell, there are no rules here--we're trying to accomplish something!' There are two troubleshooting books by John Rider. One is titled 'Servicing by Signal Tracing' and the other is 'Servicing by Signal Substitution'. One is about using a signal tracer and the other is about using a signal generator.

The BAMA link does not include either of those books. It just has the schematic and other information for a Precision E-200 series signal generator (although the first page of the PDF file is, in fact, that of the 'substitution' book). Another good resource for troubleshooting and repair is 'Elements of Radio Serviceing' by Marcus and Levy which has been archived here: Dave. I agree with Chris108. Electronic items can have multiple problems and its handy to have more than just one tool for troubleshooting. I've had equipment with dead audio stages and sometimes before I put a lot of effort into fixing that its handy to hang a signal tracer on the detector or the last IF stage to make sure the rest of the radio is OK. Otherwise you have to first fix the audio problem before you find out that maybe the LO isn't working either or someone has toasted a few coils or IF transformers rendering the unit not worth further expenditure of time or money.

Oh you could also do a lot of voltage and resistance checks to find out the same thing, but a tracer can often eliminate whole stages with one test rather than a half dozen. I used to work on a lot of Delco car radios from the 60's. The garages in town would pull them and drop them off with us to fix them. These radios had a propensity for having the RF transistors blown (ESD at the antenna I suspect).

It was kind of handy to put a signal tracer on the first IF stage and confirm this was one of the 'standard dead Delco AM auto radios' before I had to unsolder and pry back about 10 terminals from the tuning slug unit so I could flip the circuit board over and replace one transistor. It got to the point that from the time the radio hit the bench until I was done and the radio was buttoned up and playing again was around 15 or 20 minutes. Curtis Eickerman _________________.