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Old May 30th 10, 04:00 AM posted to alt.collecting.juke-boxes
Grojohn
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Posts: 19
Default Write in problem: Seeburg L-100

Ok, still troubleshooting this write in problem.

The battery test works, it will read out perfect!

The wipe on the subtract solenoid works, when I hold it in I get
-19vdc on the write-in line.

I tried to eliminate the RCSU1 board by removing it, then using
jumpers to complete the circuit. Here is how i wired it:
http://home.comcast.net/~carniello/write.jpg. (this bypasses the
selection buttons but it is set-up like i selected number "3" and
letter "C".

By looking at the schematics and the write in circuit diagram, my
circuit should be correct.
I do have 19vdc from write in to ground, but only when the write-in
line is disconnected to Memory B3. When the circuit is together, I get
no voltage on the write-in line when wiper on subtract solenoid is
made.

Now Im starting to think there is not enough power coming from the TEU
board when the circuit is complete. Like I said, I'm taking the write-
in straight from the TEU board and using jumpers, the memory
connector, and a 18k resistor.

When the circuit is complete, no voltage
When circuit is not there, I get -19vdc from write-in to ground.

Reading voltages off the board are correct, -400 at pin 6 of 6x4, -147
at the diode, etc...
I also have that -19vdc on the cathode of the diode when the circuit
is NOT complete and wipe is made; otherside its 0vdc.

Help!

John








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