You can find the technical schematics and disassembly diagrams for the at the following locations:
: A "crackly" volume knob is a common minor issue that usually only requires a quick application of electronic contact cleaner. Service & Documentation aiwa hs ta293 stereo radio cassette player repair zip
Usually due to a dirty capstan or pinch roller . Step-by-Step Repair Guide 1. Disassembly Remove the batteries. Repair Guide: AIWA HS-TA293 Stereo Radio Cassette Player