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© Copyright M-Audio
Confidential
M-Audio
Hammer 88
[MK50]
Service Manual
ATTENTION!
v1.0
M-Audio Service Manual
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Summary of Contents for M-Audio Hammer 88
- Page 1 Do not make illegal copies of this document. The information in this document contains privileged and confidential information. It is intended only for the use of those authorized by M-Audio. If you are not the authorized, intended recipient, you are hereby notified that any review, dissemination, distribution or duplication of this document is strictly prohibited.
- Page 2 As the owner of the copyright to the Manual, M-Audio does not give you the right to copy the Manual, and you agree not to copy the Manual without the written authorization of M- Audio.
- Page 3 ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED M-AUDIO SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF THAT ENTITY, AND M-AUDIO SHALL HAVE NO LIABILITY TO THAT ENTITY OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY.
- Page 4 The product is exposed to water or excessive moisture, c. The AC power supply plug or cord is damaged, d. The product shows an inappropriate change in performance or does not operate normally, or e. The enclosure of the product has been damaged. Confidential M-Audio Service Manual...
- Page 5 MIDI KEYBOARD HAMMER88 SERVICE MANUAL...
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Page 6: Table Of Contents
Contents General Exploded Drawing and List....................3 Circuit Boards..........................6 Parts List............................9 PCB Boards..........................1 4 Diagnosis............................1 5 Frequently Asked Questions......................1 8... -
Page 7: General Exploded Drawing And List
General Exploded Drawing and List... - Page 8 General Exploded Drawing and List...
- Page 9 General Exploded Drawing and List...
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Page 10: Circuit Boards
Circuit Boards Main Board Schematic-01... - Page 11 Circuit Boards Main Board Schematic-02...
- Page 12 Circuit Boards Volume Board Schematic...
- Page 13 Level Part number Description Specification Usage Remark 1020108810 Unpacking part of the digital piano MK50 1.00000 SET 1020405220 Top cabinet ASSY MK50 1.00000 SET 313010374 Top cover bracket (big) SECC T=1.5 98*60*42.5mm N/A 2.00000 PCS ++++ 398010004 SECC 1.2mm 0.13900 KG ++++ 302990005 Self-clinching nut...
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Page 14: Parts List
Parts List Base plating terminal HZ133 Printed plate terminal 0.8mm punching piece 1.00000 PCS +++++ 320010002 RD050587 MET-0144 ++++++ 398010002 SECC 0.8mm 0.00440 KG ++++ 1010114160 Main Board ASSY(AI Part) MK50 1.00000 SET CAP ELECT DIP with Tape&Reel C11 C13 C17 C65 +++++ 60308001102 100uf/16V +20% -20% 5*11mm Pitch:2.5MM... - Page 15 Parts List 216010117 End cap left ABS injection black N/A 299.5*123.1*29mm 1.00000 PCS ++++ 298010001 Plastic 0.17407 KG 216010118 End cap right ABS injection black N/A 299.5*123.1*29mm 1.00000 PCS ++++ 298010001 Plastic 0.17407 KG 211010202 Insert right ABS injection black N/A 60*29.3*2.9mm 1.00000 PCS ++++ 298010001...
- Page 16 Parts List ++++ 298010001 Plastic 0.09020 KG 20401001602 Black key ABS black N/A after change 1.00000 PCS ++++ 298010001 Plastic 0.01870 KG 211990013 Black keyboard pry arm POM Black 36.00000 PCS ++++ 319070033 Black keys counterweight SPCC T=2.0 MM the surface of galvanized 1.00000 PCS +++++ 398020006...
- Page 17 Parts List 901030134 Lubricant oil white GLY151 KLUBER (25Kg/bucket) 21.00000 G 631030267 White key hook pad 1228*8*2.5mm felt+flannelette 1.00000 PCS 215010108 Keyboard bracket ABS black N/A 1.00000 PCS ++++ 298010001 Plastic 1.83237 KG 205010155 White key(4key group) ABS White N/A 7.00000 PCS ++++ 298010001...
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Page 18: Pcb Boards
PCB Boards Main Board... -
Page 19: Diagnosis
Diagnosis Self-test Key Combination Instruction Press and hold the following key combination then power on can achieve some special functions. G7，A7，B7: Firmware update mode A0，Bb0，B0，C#1: System self-test mode System self-test function could assist QA do a comprehensive check with these functions: LEDs, MIDI OUT ports, function buttons, keyboard, pedals, USB and so on. - Page 20 Diagnosis Then the Octave LED- is illuminated in white, and the Octave LED+ is off. Test2 Button Must Follow the steps as the yellow arrow to check the buttons (from left to right): When pressed , USB and MIDI OUT will send out 176,112,xxx （ B0， 70， xx） .(xx is the number of the button) Test3 Keyboard Play keys follow the steps as the red arrow as below with an even velocity...
- Page 21 Diagnosis Test7 Expression Pedal Press to the top, will send out 162,1,127 (A2,01,7F) . Press to the bottom, will send out 162,1,0(A2,01,0) .
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Page 22: Frequently Asked Questions
Frequently Asked Questions Problem Possible Cause and Solution Even with no power supply problems, the Check the hardware. instrument still could not start up. LEDS -- Not lighting Check the power supply. 2. Check the AC jack, have it been connected reliably. A poor contact would cause unsuccessful power supply Run “test 2 Buttons”...
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