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Sometimes Bose QuietComfort 35 II (Model:789564-0010) users complain about intermittent audio input when the audio jack cable is moved. This can be a sign of a bad audio jack. This guide details the removal and replacement of the stereo jack connector. If a new audio jack is added, the following guide on soldering may be helpful:
How To Solder and Desolder Connections
Precautionary
Adhesive holds the felt down, so you may need to glue it back on when reassembling your headphones. There are no replacement parts for these felt covers.
Step 7 requires soldering skills and precision. If you’re not experienced with soldering, seek assistance.
Tools & Materials Needed
- Soldering iron (for ribbon cable and jack desoldering/soldering)
- Solder wick (to remove solder cleanly)
- Solder & soldering flux (for secure electrical connections)
- Metal spudger (for prying apart parts without damage)
- Plastic spudger (optional, useful for delicate internal work)
- Precision tweezers (for lifting cables and components)
- Wire stripper or X‑Acto/box cutter knife (to prepare cable insulation)
- Heat source (micro-torch, candle, or match) – to burn/enamel coating from headphone wires
- Adhesive (e.g., craft or hot glue) to reattach felt covers securely
- Replacement audio jack (matched to original specs)
- Safety glasses & heat-resistant workspace (for personal protection)
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Take off ear cushion pad using the plastic opening tool. Pry until you notice the seam of the ear cushion separates from the plastic tabs.
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Gently peel off the “L” and “R” felt covers with your fingers.
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Note: These covers are glued in place and cannot be replaced—set them aside carefully.
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Pro tip: Use minimal force to avoid tearing; you may need to re-glue them during reassembly.
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Remove the two 7-millimeter silver screws from the inside by using the Phillips #000 screwdriver to disconnect the back cover.
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Remove the two 5-millimeter silver screws attaching the earphones to the headband using the Phillips #000 screwdriver.
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Insert the flat end of a metal spudger between the earpiece and the band joint.
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Gently pry the joint outward until the earpiece slides free.
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Detach the silver cover on the outside of the headset using the spudger.
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Heat the solder joints near the cable connector port using a soldering iron.
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Simultaneously apply solder wick to absorb the molten solder and release the ribbon cable.
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Once solder is cleared, gently lift and remove the ribbon cable using tweezers—avoid pulling directly on the cable.
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Replace the cable connector with spare driver/audio jack combo.
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Optional: desolder the five audio jack posts seen here, and replace individual audio jack.
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Congratulations — you’ve successfully replaced the audio jack on your Bose QuietComfort 35 II headphones
- Before reassembly, compare all new and old parts to ensure compatibility.
- Reattach components by carefully reversing each prior step:
- Solder the ribbon cable and audio jack securely.
- Reinstall the earpiece to the headband and fasten all screws.
- Reposition the felt covers and reapply adhesive if needed.
- Snap on the silver back cover and reinsert the cushion pad.
- Finally, test audio functionality and mechanical fit before fully closing the headset.
Congratulations — you’ve successfully replaced the audio jack on your Bose QuietComfort 35 II headphones
- Before reassembly, compare all new and old parts to ensure compatibility.
- Reattach components by carefully reversing each prior step:
- Solder the ribbon cable and audio jack securely.
- Reinstall the earpiece to the headband and fasten all screws.
- Reposition the felt covers and reapply adhesive if needed.
- Snap on the silver back cover and reinsert the cushion pad.
- Finally, test audio functionality and mechanical fit before fully closing the headset.
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