Technics SA-EH750, Need transformer for tape recorder unit

Hi,

Tape recorder unit of Technics SA-EH750 (SA-EH750GC-S) has a burned-out transformer part. The part has the following markings on it: RTP2N5E014 (M) (M in a circle) ETP76VST61TA

7396

I called Technics parts center in US and they say that the unit is from their international division, so they don't have any spare parts for it. Google search gives that some French store has this part (RTP2N5E014), but it costs about $150-$200 - about as much as the whole unit.

Where can I get this part for a more affordable price?

Thanks in advance,

Alex.

Reply to
Alexander Liberov
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Do you know the voltage/current ratings of each winding? It would be much easier to find a solution if we knew those numbers. Do you have the schematic and/or parts list that gives those values? Without the numbers, it's nearly impossible to tell from your post.

One possibility that might save your unit is the fact that the power transformer in many consumer audio components have an overtemp fuse imbedded inside the winding area. It looks very much like an ordinary pigtail type fuse, and is usually in series with the primary winding. To get to it, cut or tear away the outer covering, which is usually heavy paper. Follow the primary leads into the assembly until you get to the first winding layer. The fuse is usually in that vicinity. Check it with an ohmmeter. It should show very low resistance if it is good. High resistance (more than a couple ohms) or open means it's bad. To find a suitable replacement, look at the nameplate of the recorder and get the power rating (if the current is listed there, even better). Using the formula Amps = Watts/Volts, calculate the current rating of the fuse (where Volts =

117V). It probably won't be exactly what the mfr specified for the transformer, but it will get you in the ballpark. Get a fuse of that current rating, and install it in the place of the bad fuse. Insulate the connections with tape or shrink tubing, wrap the transformer's outer wrap back into place and tape or tie it into place. That should get you back in operation.

If the winding itself is open (usually deep into the winding area), it's a lost cause unless you can open the transformer all the way and find the place where it's burned open. If the fault is close to the top of the winding, it might not be too much work to repair; otherwise, it's a junker. Also, if your transformer has a plastic molded winding area, you can usually junk it; you'll probably destroy the transformer trying to get it open.

Cheers!!!

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Dave M
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DaveM

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