High voltages in final test on CS4 board

[dehringer]

With regard to the transistor question, I wasn’t sure if the lead on the 0 ohm resistor going through A3  touching A4, that I mentioned above and led to trying to swap the 2N2222, could have impacted any of the other transistors.

I believe I’ve verified all the resistors on the CS4 board are in the correct place and the components on the board are correctly oriented. 

Would any of the resistors off the CS4 board affect the specific voltages I’m having issues with? (I’m learning the importance of resistor orientation for the non-striped resistors when you place it so that you can see the part numbers so you don’t have to remove the resistor from circuit to test it with a multi-meter to know what it is….)

[Paul Birkeland]

You can measure the R1 resistors while they are mounted to the board.

[dehringer]

The R1 and all other resistors on the board are correctly placed.

[Paul Birkeland]

Having repaired a great number of these kits, most of my repair efforts are spent at fixing flaky solder joints and occasionally a backwards part or a miswire. 

[dehringer]

I don’t doubt at all that it is likely one of those issues.  I have either reinspected, reheated, removed and resoldered everything on the side of the CS4 board in question at least 10 times.  So I think the board is ok.  Are there any other areas of the circuit I should be focusing in on given the  specific voltage issues?

[Paul Birkeland]

What are the Kreg voltages on the back board?

[dehringer]

The Kreg voltage on the A side is 6.6 and on the B side is 6.3.

[Paul Birkeland]

That tells you that each half of the front board is (very likely at least) attempting to deliver the appropriate amount of current. 

I would be very suspicious that the 47K 2W resistor on that side of the front C4S board isn't well soldered in.

[dehringer]

To start from a semi-clean slat, I desoldered, removed, and resoldered the 47k resistor on that side of the CS4 board. I’m still seeing the same voltages.    ((scratching head))

[Paul Birkeland]

Could I see some pictures of your D socket wiring?

Your 6922 plate and cathode are about at the same voltage, which is really the root of the issue.  This could happen if those pins are somehow shorted together on the 9 pin socket, then the rest of the circuit would respond by trying to correct that issue. 

[dehringer]

Sure thing.  I’ve attached pictures of the D socket from a few different angles, trying to get a decent view under the board above it.  Let me know if these are sufficient.

[dehringer]

Additional picture

[Paul Birkeland]

Let's also see the C socket as well.

[dehringer]

Here is the C socket.

[Paul Birkeland]

If you pull out the 6922, then measure the DC resistance between pins 1 and 3 on that socket, what do you get?  How about between pins 6 and 8?