Problem with Integration upgrade [resolved]
- Thread starter cpditter
- Start date
There's a voltage check on page 23. Can you let us know what you get for that voltage check?
I see lots of long leads poking out of the top side of that board, which makes me want to see what's going on underneath the board as well...
I see lots of long leads poking out of the top side of that board, which makes me want to see what's going on underneath the board as well...
You may have solder bridging two terminals on the bottom side of that board, and that would cause some of your issues.
You gave me three voltages and didn't assign them to terminal numbers; the manual lists for terminal numbers to check... Did you have 6922 tubes in the sockets when you performed this set of voltage checks?
How about the voltage checks on page 17?
You gave me three voltages and didn't assign them to terminal numbers; the manual lists for terminal numbers to check... Did you have 6922 tubes in the sockets when you performed this set of voltage checks?
How about the voltage checks on page 17?
I would absolutely reflow every solder joint on that board other than the LEDs as well.
OK
I think I found a solder bridge between two pins of the MJE5731 on side B...fixed that with some solder wick. Reflowed most all the joints.
Reconnected and now all 4 led's light.
Voltage readings from p 17 are now as follows
MJE5731 are 123 and 124v
Terminal 56 now 127v
Good to go?
I think I found a solder bridge between two pins of the MJE5731 on side B...fixed that with some solder wick. Reflowed most all the joints.
Reconnected and now all 4 led's light.
Voltage readings from p 17 are now as follows
MJE5731 are 123 and 124v
Terminal 56 now 127v
Good to go?
No, the tabs on the MJE5731As should read lower than terminal 56. Can you post some photos of the power supply and where you have the extra 1K resistors installed? Also you didn't mention whether you had the 6922s installed, but I would recommend installing them if you do not have them in already, then repeat these tests.
All of the joints in that photo should be reflowed, possibly with a little more solder added. Heat them up till the solder liquifies, then wait for it to flow where it wants to flow. It doesn't look like the flux has flowed out of most of those joints.
What voltage do you get at terminal 50?
How about 53?
The wall voltage isn't particularly concerning.
The wall voltage isn't particularly concerning.
How about the voltage at X on each side of the PC board?
Your C4S current sources are working properly, as we see about 40mA of current being pulled across the power supply resistors. The only real issue that I think you're having is that the four zener diodes on the PC board don't appear to be pulling down the regulated rail. Measuring the voltage between them will provide another helpful data point.
Your C4S current sources are working properly, as we see about 40mA of current being pulled across the power supply resistors. The only real issue that I think you're having is that the four zener diodes on the PC board don't appear to be pulling down the regulated rail. Measuring the voltage between them will provide another helpful data point.
So x on the B side being 53.6V would suggest that Ob should be around 107V, which is what we are aiming for.
X on the A side being 3-4mV means either those zener diodes on that side aren't well soldered or maybe (but less likely) the ground jumper isn't well connected.
X on the A side being 3-4mV means either those zener diodes on that side aren't well soldered or maybe (but less likely) the ground jumper isn't well connected.
