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General| Type | AV receiver |
|---|---|
| Amplifier Type | Discrete |
| Channels | 5.1 |
| Input Sensitivity | 200 mV (Line) |
| Signal to Noise Ratio | 80 dB (MM Phono) |
| Frequency Response | 20 Hz - 20 kHz |
| Total Harmonic Distortion | 0.08% (20 Hz - 20 kHz, 8 ohms) |
| Damping factor | 60 |
| Speaker load impedance | 4 ohms - 16 ohms |
| Digital Inputs | 2 Optical, 1 Coaxial |
| Analog Inputs | RCA: 6 |
| Surround Sound Formats | Dolby Digital, DTS |
| Dimensions | 435 x 174.8 x 419.1 mm |
Components critical for fire and electric shock risk must be replaced with ONKYO parts.
Detailed specifications for the amplifier section, including power output and distortion.
Specifications for the digital audio processing section, including sampling frequency.
Specifications for the FM and AM tuner sections, covering tuning range and sensitivity.
General specifications, power supply, dimensions, and remote control details.
Instructions for replacing fuses, emphasizing correct type and rating for fire hazard protection.
Procedures for initializing the unit and performing safety checks before returning to customer.
How to change voltage and details on the unit's memory preservation system.
Setting AM band step frequency and changing band step by parts modification.
Schematic diagram illustrating the functional blocks of the tuner section.
Schematic diagram showing the functional blocks of the video processing section.
Schematic diagram illustrating the functional blocks of the power supply section.
Diagram showing the connections and pins of the main microprocessor.
Diagram showing the connections and pins of the sub microprocessor.
Detailed description of each pin and terminal for the main microprocessor.
Continuation of the detailed description for main microprocessor terminals.
Detailed description of each pin and terminal for the sub microprocessor.
List of parts and their corresponding circuit numbers for the main PC board.
Parts lists for Power Switch, Video Terminal, Mic. Circuit, Volume Control, Headphone, and Audio PC Boards.
Continuation of parts lists for Video Terminal, Mic. Circuit, and Volume Control PC Boards.
Parts lists for Video Circuit and S Video Terminal PC Boards.
Parts lists for Power Supply, Terminal, Front Speaker, and DSP Circuit PC Boards.
Parts lists for Power Amplifier, Secondary Circuit, Terminal, and Front Speaker PC Boards.
Continuation of parts lists for Secondary Circuit, Terminal, Front Speaker, and DSP Circuit PC Boards.
List of parts for the Tuner Circuit PC Board.
Continuation of parts lists for Video Circuit and S Video Terminal PC Boards.
Continuation of parts lists for Video Circuit and S Video Terminal PC Boards.
Continuation of parts lists for Video Circuit and S Video Terminal PC Boards.
Continuation of parts list for Tuner Circuit PC Board.
Continuation of parts list for Tuner Circuit PC Board.
Complete list of all reference numbers, part numbers, and descriptions for the unit.
Parts lists for Operation Switch, Door Switch, and Sub PC Boards.
Steps for adjustment preparation and detailed procedure for idling current adjustment.
Steps to adjust microphone sensitivity and frequency correction using test signals.
Detailed steps and specifications for adjusting FM and AM tuning, stereo separation, muting, and RDS.
Procedure to adjust idling current for the power amplifier transistors.
Detailed schematic diagram illustrating circuit connections.
Detailed schematic diagram illustrating circuit connections.
High-level block diagram showing the main functional units of the AV receiver.
Detailed schematic diagrams illustrating circuit connections.
Diagram showing the internal components and their assembly order.
Diagram showing the arrangement of components and accessories in the packing box.
Note on construction differences between TX-DS939BUP/BUPB and other models.
Diagram illustrating the arrangement of accessories and packaging materials for the unit.
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