Introduction
Open the console and replacing the faders, step by step. This job need soldering skills an couple of hour.
What you need
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Remove 5 screws:
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Three screws for the lower part
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Two screws for the upper part
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Use a #4 Phillips screwdriver.
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Remove sub-d connector from bargraph.
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Remove 4 screws (2shorts/2 long) from metal bracket and mixing desk.
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Remove 15 screws:
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Remove 1 smaller screw
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remove Phillip screw #2
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Attention: these are self-tapping screws => risk of creating chips when screwing.
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remove 16 + 1 fader with fingers or a with a plastic card.
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remove 4 screws at the back.
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remove 4 screws at the front (bad pic here).
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remove carrefully from the side the 2 withe connectors.
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remove carrefully 2 cables from the power unit, unlock first the connector.
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open carefully the console from back to front by graping the sides.
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open connectors and remove 5 cables.
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you can now remove the upper part of the console.
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Cut the plastic clamps. Their are 4 clamps in the corners and 1 clamp holding flat cable in place.
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Unscrew the 10 screws with a Phillips #2 screwdriver.
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remove solder from 4 metal bracket that are fixed to the PCB from the cover.
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remove solder with a pump from 6 pin of the fader.
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remove solder from the 2 pin of the motor of the fader.
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Replace transistors by new ones.
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2SB1181.
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2SD1733.
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they are hard to find as the are being obsolete.
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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.
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add diode between base and collector as show here.
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To reassemble your device follow the following instructions in reverse order.
To reassemble your device follow the following instructions in reverse order.
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