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General| Amplifier class | - |
|---|---|
| RMS rated power | 40 W |
| Number of speakers | 2 |
| Audio output channels | 2.0 channels |
| Audio (L/R) in | 1 |
| Headphone connectivity | 6.3 mm |
| Connectivity technology | Wired |
| Suitable for | Acoustic-electric guitar |
| Product color | Black |
| Power source type | AC |
| Manual | Yes |
Weight and Dimensions| Depth | 251 mm |
|---|---|
| Width | 592 mm |
| Height | 436 mm |
| Weight | 15800 g |
User data is not saved, so backup during servicing is not required.
Procedures for replacing components, especially near heat-generating circuits.
Reasons why certain parts are not supplied as service parts.
Explanation of 'NIU' and 'UnPop' for non-mounted components.
Details on power output and input signal specifications.
Information on speaker size and front panel controls.
Lists all input, output, and effect loop connectors.
Electrical power, physical size, and weight of the unit.
Lists included accessories and optional items.
Identifies all front panel knobs, switches, and indicators.
Identifies rear panel jacks, switches, and AC inlet.
Diagram of the main cabinet structure.
Identification of handles, corners, and feet.
Exploded view of speakers and back board.
Diagram of the primary chassis assembly.
Identifies circuit boards and key components like power amp.
Details of jacks, knobs, and spacers on the chassis.
Specific component labels for Chassis View 8.
Specific component labels for Chassis View 9.
Keep wiring away from resistors and diodes.
Route primary wiring under transformer to avoid screw tips.
Ensure LED wiring is clear of the fuse.
Block diagram of signal paths on the main board.
List and description of internal wiring harnesses.
Lists parts for cabinet, chassis, and knobs.
Lists parts for switches, jacks, and speakers.
Lists circuit board assemblies, ICs, diodes, and potentiometers.
Lists fuse and fuse holder components.
Lists wiring harnesses, cables, and the power transformer.
Lists screws, nuts, washers, and general hardware.
Lists items supplied with the product.
Method to check firmware version using LED patterns.
Tests for DSP chip and front panel switches.
Verifies volume and other knob operations with LED feedback.
Checks signal levels against specifications for various I/O paths.
Verifies speaker output level and waveform distortion.
Measures noise floor at output jacks and speaker terminals.
Visual layout of the main circuit board.
Layouts for auxiliary circuit boards.
Circuit details for volume controls and ADVRs.
Connections to the CPU and EEPROM.
Power input and voltage regulation stages.
Circuit diagrams for power amplifiers.
Circuitry for input signals and equalization.
Digital-to-analog converter output paths.
Diagrams of operational amplifier filter circuits.
Circuits related to speaker muting and signal monitoring.
Circuitry for the RETURN jacks.
Signal routing for other analog jacks.
Connections for volume controls and switches.
Wiring between volume board and main board.
Diagram of the power supply board.
Wiring for the AC inlet.
