Hi, first of all sorry for my lack of skill level regarding this. I have a Technics SL-3200 & the 45 speed is not working, 33 is fine. Was wondering if anyone has any knowledge of the circuitry ? I’ve got it apart & can’t see any obvious cracks/physical damage on any of the PCB’s. I can see from the schematic that the simple 33 & 45 switching circuit share the same path back to IC1 (AN630U). Im not sure how IC1 handles these two voltages though & for what reason only the 33 speed is getting triggered. Maybe I should start by reflowing some of the relevant solder points. Voltages are good for 33 position but seem a bit skewed once in 45 position, however am unsure of correct voltages for 45 position (schematic only indicates 33 position voltages). Just wondered before I went any further if someone has experience with this old AN630 chip ? Grateful for any help whatsoever. The schematic is attached.
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