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Old July 11th 08, 07:40 PM posted to alt.collecting.juke-boxes
John Robertson
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Posts: 901
Default 222 Last Problem - Hopefully

DesotoFireflite wrote:
Hi All

OK, got the box sounding like a winner, turned out to be a few 12ax7's were
bad, got the mech to pick up records and actually play them, now to fix the
last problem I am having. This was there when I got the box, but I figured it
would go away when I had the Control Unit and the Amp rebuilt, wrong, still
present. The problem is, without fail, when you select one record, it always
has to play something else randomly, however, it always plays the selection
you picked. Sometimes after it plays everything, and does it's last scan and
stops, it will pick that record whan you make the next selection before
playing the one you actually selected. Since this was a problem that was
there when I purchased the box, I have ruled out any adjustments I have made
after rebuilding the clutch assy and readjusting the clutch's 1-2-3 & 4.
Also, I am ruling out the TSU,as that was totaly gone through and tested by a
shop that does this work regulary. Any Ideas. As always, thanks in advance.

C.G.

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This sounds like a miss-firing DETENT switch. Lift it out from the side
of the mechanism, clean it, check for corrosion on the points, then
adjust it as per the manual.

A check if the DETENT is working properly is to hook up a meter from the
'high' side of the switch and ground, then have the machine scan. If the
Detent is working correctly (and you hooked the probe to the correct
side of the switch) you should see a consistent pulse voltage on the
meter as it scans up and then back. Both directions should have almost
the same average voltage reading. An Analogue movement is easiest to see
this, but a modern cheap digital meter will work well enough.

Now if your Detent switch is not working well you will see the voltage
bounce around as the contacts close and open erratically due to either
dirt, oil (etc.), bad adjustments, or problem with the wipers on the
Tormat unit. Of course clean and polish the Tormat contacts and the
center ground plate that all the pins slide on...

John :-#)#
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