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William Sommerwerck William Sommerwerck is offline
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Default Boss TU-120 Electronic Tuner Schematic Roland LED Strobe Guitar Tuning

The fairly current/more recent *TU-12* model is a completely
different unit, not surprisingly... one SMT quad flat pack and
a TV color burst 3.579...? MHz.


3.579545 MHz. That number should be burned into the brain of anyone (in the
US or Japan, plus some Central and South American countries) who services
electronic equipment.