To Next PageTo Next Page
Need help?Do you have a question about the Hitachi HA-7700 and is the answer not in the manual?
General| Type | Stereo Integrated Amplifier |
|---|---|
| Power Output | 75 watts per channel into 8Ω (stereo) |
| Damping Factor | 60 |
| Output | 150mV (line) |
| Speaker Load Impedance | 4Ω to 16Ω |
| Input Impedance | 50kΩ |
| Input Sensitivity | 150mV (line) |
Details on output power, bandwidth, distortion, and performance metrics.
Details on input sensitivity, overload, output levels, frequency response, and performance.
Muting, dimensions, weight, power consumption, and requirements.
Focus on low distortion, high power gain, and stable operation using MOS FETs.
DC amplifier for accurate transmission and independent power supplies for enhanced sound quality.
MC head amp, equalizer amp for improved S/N, RIAA deviation, and overload capability.
High-reliability protection circuitry and PHONO selector switch functionality.
Precautions for checking, repairing, and replacing components, including safety.
Step-by-step instructions for adjusting idle current, input DC, and output DC.
Procedures for checking MOS FET, ASO, and speaker protection circuit operations.
Overall system block diagram and primary circuit diagram for specific regions.
Printed wiring board layout for the main amplifier section.
Printed wiring board layouts for pre-amplifier and power supply sections.
Identification of all controls, switches, and indicators on the front panel.
Lists of replacement capacitors and resistors for various unit sections.
Lists of replacement FETS, ICs, transistors, and diodes for unit sections.
Lists of replacement coils, switches, connectors, and other miscellaneous parts.
Identification of rear panel input, output, and speaker terminals.
Rear panel connections for tape decks, tuner, phono, and auxiliary inputs.
Rear panel power cord, AC outlets, and voltage selector information.
