Einleitung
This guide will demonstrate how to replace a faulty battery for the Sennheiser HD 4.50 BTNC. If the device does not respond when buttons are pressed, the battery might be the issue. Before beginning this repair, the headphones should be disconnected from any external power source, such as a charger.
Was du brauchst
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Locate the side designation on the headband-earpiece junction.
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The battery is on the left side.
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The motherboard is on the right side.
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Use a Phillips #00 screwdriver to remove the four 10 mm screws holding the ear cup cover in place.
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Use an opening tool to pry open the cover.
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Remove the cover.
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Using tweezers, pull the white battery connector upwards out of its socket.
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Remove the battery.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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You can search with the part number(Shown in the photo) : AHB622540N1/AHB622540N01.
This was pretty straightforward, but in opening the cap one of the tiny soldered wires pulled off the pad. It's so tiny that I don't have much hope of soldering it back. Any other way to reattach it? I put it back together anyways and now the right cup works fine, but the left is dead. I recommend a warning here about the little wires, if nothing else.
