Technics SL-BD20D Service Manual
Dc servo automatic turntable system
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Also See for SL-BD20D:
- Operating instructions manual (6 pages) ,
- Operating instructions manual (8 pages)
Table of Contents
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Table of Contents
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Questions and answers
I have a Technics SL-BD20. I'm experiencing an issue where, when playing a 7" 45 rpm record, the tonearm (if it even lowers and the stylus makes contact with the record) almost immediately gets automatically returned to the tonearm rest. When playing a 12" 33 1/3 rpm record, the tonearm reaches about the same point that would be halfway through the grooves of a 7" record and then starts skipping. The tonearm does not pick up and return to the tonearm rest; it just stays in that position and skips. I tried adjusting the screw near the tonearm pivot from the top, but that didn’t fix the problem. I opened the turntable and disassembled it enough to check for any obvious broken or misaligned parts. I noticed that the round white plastic disc with a +-shaped offset hole was placed over the small opening, which seems to be the access point for adjusting the auto-return position. However, it was just sitting over the hole without any obvious way of securing it. How do I reassemble the turntable so that this disc is properly held in place? I can’t figure out how to do this from the schematics in the manual.
To fix the auto-return issue on a Technics SL-BD20D turntable, you need to adjust the auto-return mechanism. Follow these steps:
1. Set the cueing control to the "Up" position.
2. Move the tonearm to a position above the disc where you want the auto-return to activate.
3. Locate and remove the rubber cap covering the auto-return adjustment screw.
4. Use a small screwdriver to turn the adjustment screw and set the desired auto-return position.
5. Adjust the stylus tip position if needed.
6. Check to ensure the tonearm returns properly to the arm rest after play ends.
There is no specific mention of a round white plastic disc used for this adjustment. If you are referring to a part not mentioned in the instructions, its role cannot be confirmed.
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