Motorola ts4j

[timmy]

Originally Posted by bandersen

Yes, 0 on pin 6 with respect to pin 6. See the cross symbol next to the '0V' on the chart ?

What that means is but the negative lead of your meter on pin 6, not the common negative while taking that reading. So naturally when you also put the positive lead of your meter on pin 6, you will get 0 volts.

I think looking at the contrast control is the easiest way to tell.

The early TS-4J is just a standard three terminal pot.
The TS-4J late has two extra taps and several capacitors mounted on the pot.

Ok the contrast tells, it's early. So if I am to put meter neg on pin 6 then what is positive ? Because positive to pin 6 comes right from b+ Capacitor positive. Well the SAMs, early shows infact pin 6 has 120 Vdc on it so pin 6 to negative should be that of 120 Vdc but it don't . The other SAMs shows zero volts checking the way it says. It don't show any other negative to use, no stars or marks on the SAMs which I would think it's common , on the early SAMs.