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Default PROBLEM: Nakamichi CR-7A Power Transformer


"Michael Kennedy" wrote in message
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"Arfa Daily" wrote in message
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"Eeyore" wrote in message
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EADGBE wrote:

(Scott Dorsey) wrote:

Does an ohmmeter show them as open or not?

SCOTT:

The fuse resistor that didn't blow reads exactly 1.04 ohms (that's an
in-circuit reading).

The fuse resistor that blew reads open circuit....and that is with the
resistor TAKEN OUT of circuit completely.

I figured I could replace the fuse resistor with a regular 1-ohm
resistor and get things working again, but I also realize that that is
NOT safe, and so the deck will not be powered up again until it has a
new 1-ohm fuse resistor in place...and I might even replace the other
1-ohm fuse resistor whilst I'm at it.

I wouldn't excessively fret over not fitting a genuine fusible resistor.
The
only difference between them and normal resistors is that they are (a)
designed
to fail open and (b) are flameproof. There's still another one in
circuit !

If one of those fusibles had failed (as it seems) that's why you have no
display.

Graham


I completely concur. Two fusible R's in a single winding to single
filament circuit such as this appears to be, is an overkill. At least as
a temporary measure, I would have no qualms about subbing a standard 1
ohm resistor at all, and all the 'usual suspects' that know me on here,
would readily confirm that I *never* advocate *any* practice that is in
*any way* dangerous. By all means fit a genuine replacement in the end if
that makes you feel better, but to try it, just put your pliers across
the failed one ... Honestly, you can !!

Arfa


I'll agree that Arfa never advocates anything that is dangerous. If he
says it is ok you can take his word. I also see no problem doing this
either.. You still have one fuse in the line. In your house's wiring there
is only one fuse or circuit breaker in the supply. Using 2 is overkill.

Mike

Thanks Michael. Support appreciated, as always.

Arfa