M-Audio Hammer 88 User Manual

Confidential M-Audio Service Manual
M-Audio
Hammer 88
[MK50]
Service Manual
v1.0
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ATTENTION!
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M-Audio Hammer 88 Specifications

General

Key Count	88
Velocity Sensitivity	Yes
Aftertouch	No
USB Port	Yes
Weight	38.5 lbs
Key Type	Hammer-action
MIDI Connectivity	USB-MIDI
Pedal Inputs	Sustain Pedal Input
Power Supply	USB powered
Included Software	Mini Grand, Velvet

Summary

M-Audio Hammer 88 Service Manual

ATTENTION!

Contains sensitive proprietary information. Do not make illegal copies.

Preface

Read This!

Terms and conditions for manual use, warranty voiding, liability, and restrictions.

Warnings

Safety Symbols and Precautions

Explains safety symbols and warns against unauthorized repairs and improper handling.

Component Specific Warnings

Provides cautions for power supply fuse and internal battery replacement.

Safety Instructions

General Usage Precautions

Covers power, liquids, heat, ventilation, and mounting safety guidelines.

Maintenance and Service Safety

Details safe cleaning, service procedures, and handling of product damage.

General Exploded Drawing and List

Circuit Boards

Main Board Schematic-01

Schematic diagram for the main board, covering EMC capacitors, key/LED, MIDI/OUT, MCU, and power/USB.

Main Board Schematic-02

Second part of the main board schematic, detailing octave LEDs, pitch/mod backlight, and connections.

Volume Board Schematic

Schematic diagram for the volume board, showing volume control and associated components.

Parts List

PCB Boards

Main Board

Visual representation of the main printed circuit board (PCB) with component layout.

Diagnosis

Key Combination Instruction

Instructions for entering firmware update mode and system self-test mode.

Display Description

How to interpret LED feedback for correct and incorrect self-test results.

Operation Instructions

Guidelines for navigating and completing test items using available buttons.

Button and Keyboard Testing

How to test device buttons and the keyboard functionality via self-test.

Control Element Testing

Procedures for testing volume fader, pitch bend, modulation wheels, and switch pedals.

Test7 Expression Pedal

Procedure for testing the expression pedal by pressing it to its limits.

Frequently Asked Questions