JVC JA-S77 Service Manual

Output power, total harmonic distortion, intermodulation distortion, and frequency response.

Input sensitivity, impedance, phono overload, and signal-to-noise ratio for pre-amp section.

Details on loudness control, tone controls, and filter specifications.

Power source, consumption, physical dimensions, and unit weight.

Visual representation of signal paths and main functional blocks within the amplifier.

Step-by-step instructions for removing the unit's top cover and bottom plate.

Identification and location of major internal components viewed from the top.

Identification and location of major internal components viewed from the bottom.

Exploded view illustrating the front panel assembly and its constituent parts.

Exploded view illustrating the rear panel assembly and its constituent parts.

Exploded view detailing the heat sink and power transistor components.

Procedure for setting the center voltage of the main amplifier section.

Procedure for setting the idling current of the main amplifier section.

Procedures for adjusting the power meter sensitivity and equalizer amplifier center voltage.

Details of the TPS-59D AC Fuse PCB, including its part numbers and descriptions.

Diagram and component identification for the TXX-109 Driver Amplifier PCB.

Diagram and component identification for the TXX-110 Tone Control PCB.

Diagram and component identification for the TXX-111 Equalizer Amplifier PCB.

List of materials used for packing the unit, with associated part numbers.

List of accessories provided with the amplifier, including their part numbers and descriptions.

Cross-reference of parts based on geographical region, detailing applicable part numbers.

Circuit diagrams illustrating power supply configurations for USA, Canada, Europe, and UK.

Further details on circuit diagrams for Australian and UK power supply configurations.