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If the headphones will not accept a charge from the micro usb cable, the charging port may need to be replaced and the volume dial is soldered onto the circuit board. This process is moderately difficult and may take up to three minutes. The only tool necessary will be the #000 Philips screwdriver.
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Grab the earmuffs with one hand and hold the headphones with the other.
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Pull the earmuff until it separates from headphones as shown.
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After removing the muffs, the speaker cover must be removed by unscrewing 4 3mm Phillips screws using a #000 Phillips screwdriver.
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After locating the circuit board that contains the charging port as well as the volume control dial, two 3 mm screws must be removed using a #000 phillips screwdriver.
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Unplug the blue ribbon attaching the circuit board to the motherboard.
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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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University of New Orleans, Team 5-2, McDonald Fall 2023 crwdns2935289:0University of New Orleans, Team 5-2, McDonald Fall 2023crwdne2935289:0
UNO-MCDONALD-F23S5G2
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where do I get the replacement module?
Have you found one yet? I've needed to do this repair for a while.
Paul B -
I was also trying to find the replacement module https://spares.sennheiser-hearing.com/ca..., but a Sennheiser agent told me that they're no longer available.
Guess I have a nice pair of wired headphones now.
You are not alone! My headphones just came from the repair shop. I needed to change the sponges and, what I thought, change a faulty battery. Had already bought the spare parts. Everything worked fine for 3 days (while the new battery was full) and then I could not charge it anymore. went back to the shop, they opened the headphones but cannot get a charge signal in the battery, which means that there is no current passing to the battery. I bought an adapter to connect my "nice pair of wired headphones" to my phone.
