I am restoring a Sorcerer that was delivered to me disassembled. While I am waiting on a few other parts of the project I am giving the boards a once-over. I assume they are working, but I have not tested yet.

The MPU has a jumper on the back that looks like part of a section of the board that has had some pieces replaced. It looks like it is connecting U57 Pin 4 to the resistor network SR2 (pin 2?).

Here's front and back pictures of the section and the schematic. Q43 and Q47 have been replaced. Looks like it may relate to 1J11-1 ("SOL 1").

Any idea what this is doing? Anything I can check or verify on it before I get it in the machine? Appreciate the help.

PXL_20220201_211942436 (resized).jpg
PXL_20220201_211956977 (resized).jpg
PXL_20220201_211339290 (resized).jpg

Haha, thanks you two. I thought maybe it was just standing in for a trace, but the other replaced elements in the same general area made me think maybe there was more to it. I guess we'll find out when we finally ahve a chance to boot it up! Maybe this is my excuse to buy up some bench test equipment. Hmm...