Alesis QS7.1 Manuel d'utilisateur

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GENERAL DISCLAIMER: THIS DOCUMENT IS MADE BY USERS FOR USERS AND IS NOT ENDORSED BY ALESIS. THE
AUTHORS MAKES EVERY EFFORT TO ENSURE, BUT CANNOT AND DO NOT GUARANTEE, AND MAKE NO
WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED AS TO, THE ACCURACY, INTEGRITY AND TIMELINESS OF
THIS INFORMATION. THE AUTHORS ASSUME NO LIABILITY OR RESPONSIBILITY OF ANY KIND FOR ANY ERRORS
OR OMISSIONS IN THE CONTENT OF THIS DOCUMENT AND FURTHER DISCLAIMS ANY LIABILITY OF ANY NATURE
FOR ANY LOSS HOWSOEVER CAUSED IN CONNECTION WITH USING THIS INFORMATION.
BOTTOM LINE: IF YOU DON’T KNOW HOW TO USE A SOLDER IRON, QUIT READING THIS DOCUMENT AND
CONTACT ALESIS AUTHORIZED REPAIR CENTER. ;^)
Alesis QS Synthesizers
UNOFFICIAL REPAIR GUIDE
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Résumé du contenu

Page 1 - Alesis QS Synthesizers

GENERAL DISCLAIMER: THIS DOCUMENT IS MADE BY USERS FOR USERS AND IS NOT ENDORSED BY ALESIS. THE AUTHORS MAKES

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 10 FIGURE 10 - S6 CASE SCREW LOCATIONS FIGURE 11 - QS7QS8 CASE SCREW LOCATIO

Page 3

ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 11 4.40 REPLACING INDIVIDUAL KEYS Broken keys are an unfortunate consequence

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 12 2.34 THE KEYSCAN ASIC While the task of polling the keyboard may seem difficult

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 13 The harder a key is pressed, the faster it moves. Since Rate = Distance/Time kno

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 2 REPAIR A BROKEN PITCH BEND WHEEL So you’ve been using your pitch bend wheel for v

Page 7

ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 3 Now you should see something like this... This is what we are look

Page 8

ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 4 Make sure the pin is NOT wide open, avoid anything like this: This is the way

Page 9 - REPAIR A BROKEN KEY

ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 5 Now, how long should the spring wires be? Use the original to measure or place b

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 6 AUDIO OUT NOISE REPAIR SYMPTOM Low signal level, noisy or humming main audio o

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 7 3) With the QS open it is easy to find the power supply board and lying by its s

Page 12 - 2.34A READING VELOCITY

ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 8 5) With the solder iron, replace the transistor with the new one. 6) Close

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ALESIS QS SYNTHESIZERS UNOFFICIAL REPAIR GUIDE 9 REPAIR A BROKEN KEY 4.00 TROUBLESHOOTING AND REPAIR With the release of the origi

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