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General| AD/DA Conversion | 24-bit |
|---|---|
| Sampling Frequency | 44.1 kHz |
| USB | Yes |
| Display | LCD |
| Type | Guitar Multi-Effects Processor |
| Effects | Overdrive, Distortion, Fuzz, Modulation, Delay, Reverb |
| Patches | 30 User, 30 Preset |
| Looper | 38 seconds |
| Inputs | Guitar Input (1/4" phone type), AUX IN jack (Stereo miniature phone type) |
| Outputs | 2 x 1/4" (L/Mono, R) |
| Expression Pedal | Built-in |
| Power Supply | AC Adaptor (included) |
Notes on power, data backup, parts list conventions, and circuit diagrams.
Step-by-step guide to calibrate the expression pedal and understand its history.
Instructions for entering Test Mode for service purposes.
Details AD/DA conversion, sampling frequency, and AF method.
Specifies memory capacity, sound library categories, and effect types.
Details connectors, input/output levels, and impedance.
Describes the display type and power supply requirements.
Information on current draw, dimensions, and weight of the unit.
Lists standard accessories and available options.
Diagram and list identifying all controls, their numbers, and part codes.
Visual representation of the ME-25's components for service.
Lists main unit parts, PWB assemblies, screws, nuts, and washers.
Guidance on replacing key components, noting part compatibility and modifications.
Lists safety precautions, casing, chassis, switch, and jack components.
Details PWB assemblies, diodes, potentiometers, and cables.
Lists screws, miscellaneous parts, and standard accessories like manuals.
Procedure to check the ME-25's firmware version.
Instructions for data management and performing a factory reset.
Lists items needed and procedure for updating the ME-25's system firmware.
Lists required equipment and steps to enter Test Mode for diagnostics.
Exiting Test Mode, skipping items, and performing version/device checks.
Tests for current consumption, voltage, switches, and LEDs.
Tests control knobs and calibrates the expression pedal, explaining history.
Verifies PHONES and OUTPUT L/R signal integrity, voltage, and disconnect behavior.
Checks A/D conversion, AUX input, clipping, and residual noise levels.
Verifies USB connectivity and battery power functionality.
Illustrates the main functional blocks and signal flow of the ME-25.
Shows MIX, EEP-ROM, USB, and other signal processing components.
Visual layout of components on the main circuit board.
Detailed view of component labels and placement on the main PCB.
Schematic of analog input, power supply, and bias circuits.
Schematic of analog output stages and amplifier ICs.
Schematic showing digital signal paths, USB, ESC, and LED sections.
Schematic of switch section, microcontroller interface, and update logic.
