[Jukebox-list] Seeburg KD-200 Tormat/Selector issues....

[John Robertson]

Well, for the moment I'm stumped. Using the tests (FS 92 pages 1 - 4) 
for the KD200 I found that "H Test (Write in)" gives a suggestion that 
the Electric Selector is defective. The test speaks to "Open circuit pin 
C7 or defective starting switch" The problem for me is I can't find any 
other reference to this 'starting switch'! If they are referring to the 
switch in the SPU - that is fine, plus I have traced the circuits 
through the RCSU-1, the Electric Selector and the Tormat. All seem 
correct resistance and no shorts to ground that I have found so far. I 
did try the "L Test" and this resulted in selection 'V1' playing as it 
is supposed to - this again says the "Replace Electric Selector (shorted 
to ground)" - but no shorts!

Battery test works fine so the Read-Out circuitry is just fine - thanks 
for asking.

I've fixed a great many of these Tormat based machines over the years, 
but this guy has me a bit troubled...I am considering testing the 
Electric Selector with my 350VDC power supply to see if there might be 
arc over which doesn't show up on a resistance test (no resistance up to 
20MR to ground) - but not sure if that will help.

The Electric Selector looks great - continuity between the wipers is 
perfect, no broken wires, no open circuits. Opened the plugs - all look 
good.

I'm overlooking something really obvious I'm sure...but need a fresh 
viewpoint(s) from folks that have _/*serious*/_ experience with Tormat 
write-in logic.

The diode shaping circuit is good, capacitors have been replaced and 
triple checked. Resistors all appear to be good (correct values in 
circuit), voltages are spot-on...

Tony? Anything you remember about this series? The PCBs are all good, 
wipers all polished and resistance checks on the relays and wipers all 
zero out when closed...

Oh, and I've read the section on my web site about Tormats: 
http://www.flippers.com/Seeburg-tormat.html and 
http://www.flippers.com/Seeburg-trblshoot.html - and I'm rereading these 
in the hopes that I can find the problem.


John :-#(#

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