Hey Guys,
Looks right to me. That is how I have always done it on my 700's. See #15.
I may be mistaken with my interpretation of the documentation, but it has worked perfectly for 3 amplifiers, Fully WOPL'd.
At the point in the build that I bring up the backplane, I do not have the DC Protect board installed in the chassis, therefore there is nothing hooked to the speaker output studs/jacks.
TP3 is provided for that (on the 700 Backplanes). I see the TP next to the outputs on Kyles 400 backplane, can’t tell if it is TP3 or TP 4 on that board, but he has the resistor placed correctly. One of Joe’s innovations that makes testing and troubleshooting these boards so straightforward.
This is from the "Backplane Bring Up Documentation” From Joe:
14. Install ONLY the bottom most row of transistors, starting with the transformer side an MJ21196
in first column, then MJ21195 in second column, then MJ21196 in third column, then MJ21195
in fourth column.
15. Temporarily attach a 10K ohm resistor between each channel output and DC ground.
16. With the one wire from the DC ground bus bar to the chassis standoff tie point temporarily
removed, test for no shorts to the chassis. Test each transistor can for no shorts to the chassis
as well.
17. Bring up wired bare chassis with Variac and DBT......................
