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Identification of integrated circuit pinouts and types.
Identification of transistor types and lead pinouts (E, C, B).
Identification of diode types and anode/cathode orientation.
Mapping of microcomputer ports to specific operational functions and actions.
How the microcomputer detects button presses via port combinations.
Detection of tonearm position using optical sensors and corresponding microcomputer ports.
Logic for tonearm movement during lead-in sequences (30, 25, 17cm).
Conditions that trigger the automatic return of the tonearm.
Conditions required for selecting music tracks directly.
List of tools and equipment needed for service adjustments.
Procedures for setting stylus pressure, tonearm position, and height.
Procedures for confirming arm trace and adjusting feed, lead-in, and approach.
Method for calibrating the track sensor sensitivity for accurate operation.
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General