The IBM Wheelwriter 6 typewriter does not have a user-adjustable sensitivity setting for key strikes. However, the issue you're describing might be related to the keyboard mechanism, individual key switches, or the impact solenoid. Here are some steps you can take to troubleshoot and potentially resolve the issue:
- Clean and Lubricate: Over time, dust, dirt, and debris can accumulate inside the typewriter, affecting key movement. Try gently cleaning the keyboard area, especially around the key switches and mechanisms. Additionally, applying a small amount of appropriate lubricant to the moving parts might help improve key movement.
- Key Switches: Each key has its own mechanical switch underneath. If a key requires more force than usual to activate, it could be due to a worn or dirty switch. You might need to disassemble the typewriter to access and clean the key switches.
- Impact Solenoid: The impact solenoid is responsible for striking the print head against the paper to make an impression. If the solenoid is weak or sticking, it could result in the behavior you're describing. Try cleaning and lubricating the solenoid. If the problem persists, the solenoid might need to be replaced.
- Key Flex: The flex you feel in the keyboard might be contributing to the issue. If the keyboard has any physical damage or if the flex circuit is not seated properly, it can affect key activation. Carefully inspect the keyboard area for any visible damage or misalignment.
- Professional Repair: If the above steps do not resolve the issue, it might be best to seek the assistance of a professional typewriter technician. They have experience with these machines and can diagnose and repair mechanical issues more accurately.
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