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Technics su v78 schematic diagram - Audio Players & Recorders

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Posted on Jan 02, 2017

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SOURCE: I need a replacement power switch for a Technics

The Panasonic part number is: ESB8249V

This part is listed as no longer available from Panasonic, but I believe that it is available generically. Try calling the tech line at MCM electronics. They should have a substitute that will fit and work.

Dan

Posted on Oct 27, 2009

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SOURCE: What is the value of resistor R451 in Technics amplifier SU-Z25

If you are in the power supply, are you sure that one is used? 4xx series are power supply designations. Maybe numbers got transposed?
2 ways to approach it.
I am looking at an SUZ22 and an SUZ55, the power supplies are roughly the same. The closest component is R416 which is a 39 Ohm resistor. This supplies power to the flourescent display in a current limitng mode.

The alternate approach is where is it in the circuit? what is "downstream of it"?

If it was a larger 1 Watt or 2 Watt Try 1500 Ohms.

If it is the flourescent display, 39 ohms is most probable for manufacturer inventory purposes. If LCD, try 390.

If the preamp is downstream, it is not going to require a great deal of power, and you may be able to trace a parallel trace off the other channel to a corresponding resistor. If that has been tried and it just traces back to the same point, Try 1500 Ohms.

Also, there is symetry in the amplifier because it uses a split supply Vcc- and Vcc+ Not to mentione the symetry between right and left channels.

Posted on Jul 05, 2012

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I need a replacement power switch for a Technics SU-V78 amplifier . Where can I order one.


The Panasonic part number is: ESB8249V

This part is listed as no longer available from Panasonic, but I believe that it is available generically. Try calling the tech line at MCM electronics. They should have a substitute that will fit and work.

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