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Introduction

Open the console and replacing the faders, step by step. This job need soldering skills an couple of hour.

  1. Remove 5 screws: Three screws for the lower part
    • Remove 5 screws:

    • Three screws for the lower part

    • Two screws for the upper part

    • Use a #4 Phillips screwdriver.

  2. Remove sub-d connector from bargraph. Remove 4 screws (2shorts/2 long) from metal bracket and mixing desk.
    • Remove sub-d connector from bargraph.

    • Remove 4 screws (2shorts/2 long) from metal bracket and mixing desk.

  3. Remove 15 screws:
    • Remove 15 screws:

    • Remove 1 smaller screw

    • remove Phillip screw #2

    • Attention: these are self-tapping screws => risk of creating chips when screwing.

  4. remove 16 + 1 fader with fingers or a with a plastic card. remove 4 screws at the back. remove 4 screws at the front (bad pic here).
    • remove 16 + 1 fader with fingers or a with a plastic card.

    • remove 4 screws at the back.

    • remove 4 screws at the front (bad pic here).

  5. remove carrefully from the side the 2 withe connectors. remove carrefully 2 cables from the power unit, unlock first the connector.
    • remove carrefully from the side the 2 withe connectors.

    • remove carrefully 2 cables from the power unit, unlock first the connector.

  6. open carefully the console from back to front by graping the sides. open connectors and remove 5 cables. you can now remove the upper part of the console.
    • open carefully the console from back to front by graping the sides.

    • open connectors and remove 5 cables.

    • you can now remove the upper part of the console.

  7. Cut the plastic clamps. Their are 4 clamps in the corners and 1 clamp holding flat cable in place. Unscrew the 10 screws with a Phillips #2 screwdriver. Unscrew the 10 screws with a Phillips #2 screwdriver.
    • Cut the plastic clamps. Their are 4 clamps in the corners and 1 clamp holding flat cable in place.

    • Unscrew the 10 screws with a Phillips #2 screwdriver.

  8. For each fader remove the 2 blacks screws with a philips #2.
    • For each fader remove the 2 blacks screws with a philips #2.

  9. remove solder from 4 metal bracket that are fixed to the PCB from the cover. remove solder with a pump from 6 pin of the fader.
    • remove solder from 4 metal bracket that are fixed to the PCB from the cover.

    • remove solder with a pump from 6 pin of the fader.

    • remove solder from the 2 pin of the motor of the fader.

  10. Replace transistors by new ones.
    • Replace transistors by new ones.

    • 2SB1181.

    • 2SD1733.

    • they are hard to find as the are being obsolete.

  11. An idea from web forum from a Yamaha Technician that propose to add 4X 1N4148 diode by fader to protect the transistor. as free wheel.
    • An idea from web forum from a Yamaha Technician that propose to add 4X 1N4148 diode by fader to protect the transistor. as free wheel.

    • add diode between base and collector as show here.

Conclusion

To reassemble your device follow the following instructions in reverse order.

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F. Jeanneret

Member since: 12/27/2017

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