Fixing a Quicktake 150 serial connector

The Quicktake 100 and 150 have the same layout on that level. Problem with this Quicktake 150 was that it didn’t respond to the computer. It sent its Hello when DTR went down, but then did not reply to the first computer init message. I supposed it meant its RX pin was somehow disconnected. This was true. The Quicktake is an assembly of multiple PCBs (at least 5), connecting to each other via flat flexible cables, ribbon cables, bare wires, and PCB-to-PCB connectors, either angled or stacked. It is hell to disassemble and even worse to reassemble. The smallest one of the PCBs is the I/O ports one, which is connected to the large bottom’s PCB via two SMT connectors1. The problem lied on the connector, on the small I/O PCB. While checking every pin, I noticed that pin 2 was also disconnected. I didn’t manage to fix the connector, so I went the bodge wire route. My two bodge wires Here is documentation for next time I have to verify the serial port’s connectivity up to the ICs, U309 and…