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Detailed procedure for adjusting idle current on the tone and power amp board.
Steps for adjusting the equalizer section using a digital voltmeter.
Instructions for safely removing the control wire adapter for specific functions.
Steps for correctly installing the control wire adapter for specific functions.
Supplementary list of parts, particularly for different regional models and parts marked with asterisks.
Lists components for the AUE-012D, AUE-012B, and AUE-012C Equalizer Amplifier units.
Comprehensive list of components for the ETC-404B Tone & Power Amplifier unit.
Circuit diagram for the AUE-012 Equalizer Amplifier unit.
Circuit diagram for the ETC-404 Tone & Power Amplifier unit.
Diagram illustrating connection variations for the AUE-012 unit by region.
Detailed circuit diagrams for specific sections of the AUE-012 EQ. AMP unit.
Diagram for the speaker selector switch and headphone output on the AUE-012 unit.