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MIDI

SERVICE MANUAL

KEYBOARD

HAMMER88 PRO

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Содержание Hammer 88 Pro

Страница 1: ... 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 disclos...

Страница 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 ...

Страница 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...

Страница 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...

Страница 5: ...MIDI SERVICE MANUAL KEYBOARD HAMMER88 PRO ...

Страница 6: ...Contents 2 35 20 Calib ration 28 5 General Exploded Drawing and List 4 Layout Connection 3 Circuit Boards PCB Boards 1 7 Diagnosis Spare Parts List Parts List 9 ...

Страница 7: ... Board CN6 3 MB Board 50P Cable to FB Board J7 4 FB Board CN1 to LED Board J11 5 Wheel 6P Cable to FB Board J2 6 FB Board J3 PIN Cable to Knob Board J1 7 FB Board 30P Cable to PAD Board J1 Keyboard Left 20pin Cable to Main Board CN9 Keyboard Right 20pin Cable to Main Board CN10 3 ...

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Страница 32: ...damaged replace it d Check if the related components of the USB jack are properly soldered e Check both ends of FB2 the grounding should have 5V voltage If not then check if FB2 is properly soldered If the FB2 is damaged replace it f Check if the toggle switch is damaged g Check if the voltage on both ends of D8 and D9 is normal if only one end has it then D8 and D9 have virtual welding or damage ...

Страница 33: ...ith the ground If short cut the line and check the location of short circuit d Determine whether U1 can output 3 3V check whether PIN5 has 3 3V if not then replace the chip e Check whether there is 3 3V at both ends of L4 to determine whether there is virtual welding or damage f Determine whether U31 can output 3 3V check whether PIN2 has 3 3V if not then replace the chip g Check whether there is ...

Страница 34: ...eck the cable connection between the keyboard circuit the function board and the mainboard 2 Check whether each key button is installed correctly 3 No response when pressing the keyboard a Check the ribbon cable on the keyboard circuit the ribbon cable socket between the keyboard circuit and the mainboard are properly soldered or if it s damaged b Check the mainboard s 88 key socket to A1 keyboard...

Страница 35: ...rmally and whether the device is damaged by false welding 4 Check the LED for scanning signal 4 OLED Display Error 1 Check whether the connection line and socket between the OLED panel and the motherboard are normal 2 Check whether the power supply and grounding of the OLED panel is normal 3 Check whether the OLED backlight booster circuit works normally and whether the output voltage of 12V is no...

Страница 36: ...ase refer to the A1 chip part in this section Cannot turn on the power Check if the SPI FLASH is properly soldered or if the chip is damaged 6 MIDI issues 1 Check whether MIDI block and MIDI line are normal 2 Check if the MIDI Out circuit is properly soldered If the triode is damaged replace it 32 ...

Страница 37: ...er issues a Check whether the connection line and socket are connected properly b Check whether the power supply and ground are normal on the small plate where the push rod is located c Check whether the push rod circuit is welded normally and whether the device is damaged by virtual welding d Check whether the U5 4051 circuit is welded normally and PIN3 cannot output signals then replace the 4051...

Страница 38: ...Appendix Circuit board panorama Figure 1 Motherboard front Figure 2 Back of the main board 34 ...

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