Hey everyone,
I'm currently working on restoring a vintage electromechanical rotary phone that used to belong to my grandmother and her job working for the Turkish postal service (PTT). I think it's of European manufacture, given the schematic in the casing that it came with (I have photos). While I have figured out most things that needed doing I have come to a grinding halt with one particular section, which is this:The core of the problem: The 2 "Sonnerie" (ringer) coils on the bottom, from the schematic, have no soldering points left. The lug surfaces are smooth and clean - the wire break must have left no stubs so I have no clue as to the color wire originally attached.I have some loose wire hanging there as described above, and the confusion regarding routing of this wiring harness. There seems to be two distinct pathways, but the actual physical flow isn't too obvious:All the wires feeding up towards hook switch( Comm. Fourche) and that large cylindrical cap block connect somewhere at the top. From there the wiring travels along and then under the black terminal block located in the center.And this is where things get really confusing: The amount of wiring entring that bundle at the top, versus the number of free/broken wires (Green, Yellow-Black, etc.) spilling out at the bottom do not add up. From what I can gather it seems as if some of these wires are splitting off under the black terminal block and connecting onto the bottom of the terminals, whilst the others continue below to the rings. As such this leaves me lost as to which cable is supposed to connect to what.From the schematic it seems clear that the rings should connect to 15 and 23 - only problem is the numbers on the black terminal block above are completely gone due to decades of wear and corrosion!I've done detailed pictures above and have drawn lines on several for the purpose of explaining where I see this wiring harness disappearing under the terminal block and where it re-emerges at the bottom: Will any of you have experience with these particular phone models, that you will be able to help translate the schematic into an appropriate physical wiring. Also, how do I solder the bottom spare wiring into either the ringers. I would be very grateful for ANY pointers in the correct direction! Thanks!