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Confidential

M-Audio Service Manual

M-Audio

Keystation 88 MK3

[MK35B]

Service Manual

v1.0

2020-08-25

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. If you are not authorized, please
contact M-Audio and destroy all copies of this document. You may contact M-Audio at

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© Copyright M-Audio

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Summary of Contents for Keystation 88 MK3

Page 1: ...ded recipient you are hereby notified that any review dissemination distribution or duplication of this document is strictly prohibited If you are not authorized please contact M Audio and destroy all copies of this document You may contact M Audio at support m audio com Copyright M Audio ATTENTION This document contains sensitive proprietary information All recipients must have a current non disc...

Page 2: ...e Manual shall be solely your responsibility and M Audio shall have no liability for any such repairs or service work All such service or repairs are performed at the sole risk of the person performing the service or repairs You agree that all such work will be performed in a competent professional and safe manner at all times and to indemnify and fully hold M Audio and its successors and assigns ...

Page 3: ...TE WITH ANY M AUDIO DISTRIBUTOR OR AUTHORIZED REPAIR SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER 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 Regard...

Page 4: ...es heat registers radiators or other heat producing equipment 7 Ventilation When installing the product make sure that the product has adequate ventilation Improperly ventilating the product may cause overheating which may damage the product 8 Mounting The product should only be used with a rack which the manufacturer recommends The combination of the product and rack should be moved carefully Qui...

Page 5: ...SERVICE MANUAL MIDI KEYBOARD Keystation 88 MK3 ...

Page 6: ...Contents 2 1 7 5 General Exploded Drawing and List 4 Layout Connection 3 Circuit Boards PCB Boards 1 1 Spare Parts List Parts List 7 Frequently Asked Questions 1 6 Diagnosis 1 3 ...

Page 7: ...Layout Connection 3 Main Board CN1 CN2 20 PIN Cable to keyboard Wheel 6P Cable to Main J1 Main board J10 20PIN Cable to function board J1 ...

Page 8: ...General Exploded Drawing and List 4 ...

Page 9: ...Main Board Schematic Circuit Boards 5 ...

Page 10: ...Function Board Schematic 1 Function Board Schematic 6 Circuit Boards ...

Page 11: ... C The surface of the convex silkscreen white line 1 00000 PCS 299010129 Fader cap ABS injection Pantone process black C N A 1 00000 PCS 298010001 Plastic ABS 0 00052 Kg 628072312 Flat connector with cathode plug 20pin L 180mm UL2651 28AWG 1 00000 PCS 1010306660 Function board ASSY KS88 MK3 MK35B 1 00000 SET 6110200560 Slide Potentiometer H3043N1 2 RFC B10KA L5B M J3 HongYu 1 00000 PCS VR1 6190101...

Page 12: ...0000 PCS 298010001 Plastic ABS 0 02175 Kg 298050016 Color seed A61 YS 87527 SM The ratio 8 1 60000 g 20501019501 White key D ABS White N A KS88 Switch to ABS121H 7 00000 PCS 298010001 Plastic ABS 0 02175 Kg 298050016 Color seed A61 YS 87527 SM The ratio 8 1 60000 g 20501019601 White key E ABS White N A KS88 Switch to ABS121H 7 00000 PCS 298010001 Plastic ABS 0 02175 Kg 298050016 Color seed A61 YS ...

Page 13: ...69 C71 72 C60 603010270 Ceramic CAP SMD 20P 50V 2 0402 NPO Yageo 2 02000 PCS C9 10 603010155 CAP CERAMIC SMD 47pf 50V 10 10 0402 SMD 2 02000 PCS C79 80 603010272 CAP SMD 510pf 50V 5 5 0402 NP0 SMD 2 02000 PCS C49 51 603010004 CAP CERAMIC SMD 100pf 50V 5 5 0603 NP0 SMD 2 02000 PCS C57 C59 506040673 PCB Dual layer FR4 1 6mm 143 6X86X1 6MM MK35B_MB_V01 1 00000 PCS 608090008 ESD SUPPRESSOR TESC0R15V05...

Page 14: ...20kg m 3 270 128 100mm 1 00000 PCS 634000596 EPE Right Black EPE 20kg m 3 270 128 100mm 1 00000 PCS 634000595 EPE Middle Black EPE 20kg m 3 280 128 100mm 1 00000 PCS 649004389 Carton 1set K K dieline 1445 280 145mm 1 00000 PCS 699000219 Brown paper 1226 45 0 2mm 1 00000 PCS 901020022 keyboard Protect Rubber paper HP75 200M 50 0 01mm no viscosity 0 00500 ROLL 6280800850 USB cable USB L 1500mm 50 PV...

Page 15: ...Main Board T O P Main Board BO T PCB Boards 11 ...

Page 16: ... D4x1 D4x2 D8 D8x1 D8x2 LEFT LEFTx1 LEFTx2 ENTER ENTERx1 ENTERx2 UP UPx1 UPx2 RIGHT RI G HTx1 RI G HTx2 STOP STOPx1 STOPx2 PLAY PLAYx1 PLAYx2 REC R ECx1 RECx2 OCT OCT x1 OCT x2 OCT OCT x 1 OCT x 2 ADVANCE ADVANCEx 1 ADVANCEx 2 DOWN DOWNx1 DOWNx2 C3 C3x1 C3x2 C4 C 4x1 C4x2 J1 J1x1 J1x2 J1x3 J1x4 J1x5 J1x6 J1x7 J1x8 J1x9 J1x10 J 1 x 1 1 J 1 x 1 2 J1x13 J1x14 J 1 x 1 5 J 1 x 1 6 J1x17 J1x18 J1x19 J1x...

Page 17: ...k with these functions LEDs MIDI OUT ports function buttons keyboard pedals USB and so on Before power on please follow the procedures below 1 Connect the USB port of the instrument to a computer Connect the MIDI OUT port to a sound source 2 Hold down the lowest C C D E then push the Power Supply switch to battery Run the software MIDI OX on computer then select the Keystation 49 or Keystation 61 ...

Page 18: ...en press OCT to switch to the next test item Hold down the ADVANCE button then press OCT to go back to the previous test item Test 1 Function Buttons Follow the numbers marked in Red to check the buttons starting from 1 and press the sustain pedal at las If right OctLED OctLED light green or they light red After all buttons are passed Hold down the ADVANCE button then press OCT to switch to Test 2...

Page 19: ...hold down the ADVANCE button then press OCT to switch to Test 5 ADC Test 3 ADC Volume slider Slide it all the way to the top the LEDS light orange then slide it all the way to the bottom the value will reach 0 and the LEDS will light green Pitch bend Push the wheel all the way to the top the LEDS show orange then release the wheel the LEDS will light red Push the wheel all the way to the bottom an...

Page 20: ...ems Run test 3 Function Buttons to see if all button are OK to enter test mode refer Key Combination Instruction chapter Keyboard problems Run test 4 Keys to see if Keyboard is OK to enter test mode refer Key Combination Instruction chapter ADC problems Run test 5 ADC to see if all button are OK to enter test mode refer Key Combination Instruction chapter USB MIDI device is unavailable from PC sof...

Page 21: ...BS injection pantone Black C non surface treatment 16 15 7 14 8mm 3 PCS 101240147 0 wheel ASSY Keystation 88 MK3 MK35B 1 SET 299040018 Slider cap ABS injection Pantone process black C The surface of the convex silkscreen white line 1 PCS 628072312 Flat connector with cathode plug 20pin L 180mm UL2651 28AWG 1 PCS 101030666 0 Function board ASSY KS88 MK3 MK35B 1 SET 202040028 Bottom Cabinet HIPS inj...

Page 22: ...gthen metal sheet SECC 2 0mm 98 15mm N A 1 PCS 631030390 white key limit felt mk35b material EVA felt size 1233 10 6 5 hardness 70 EVA 60 felt single sided adhesive 6010 1 PCS 629990477 Silicone foot SA60 black Silicone diameter 29 5mm T 2 5mm single side with general adhesive 1 PCS 634000597 EPE Left Black EPE 20kg m 3 270 128 100mm 1 PCS 634000596 EPE Right Black EPE 20kg m 3 270 128 100mm 1 PCS...

Page 23: ...R 640000524 Software download card 128 128mm 400g of copper plate brightness to half light print 4C 1 PCS 641011402 label Size 59 30mm 4 R3 5mm material for PC frosted thickness of 0 3 MM white work on black 3M 9448A 1 PCS 639003215 MANUAL Multilanguage SIZE 5 5 8 5inch 80g 1 PCS ...

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