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Sony RX1R II Full Disassembly and Sensor Dust Cleaning Review

  
 
Fred Miranda
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p.2 #1 · Sony RX1R II Full Disassembly and Sensor Dust Cleaning Review


Tschanrm wrote:
Hi Fred,

If your service manual says Sony 1-251-928-21 for the socket (mine does), then the battery you want is Panasonic ML-621-SZ. I believe it's discontinued but the Seiko MS621FE should fit. https://www.digikey.com/en/products/detail/seiko-instruments/MS621FE/1887175

Fun fact: Sony has been using the same internal battery and socket since at least as far back as the A6000. Sony 1-251-928-21. It's in many, many cameras, as recent as the A7SIII and A7IV from what I have seen.

A7 internal socket and battery:
https://3.img-dpreview.com/files/p/E~forums/67869436/6413aadfe6644845b1a11e46aef40f6e

Thanks so much for all the detailed info! I went ahead and ordered two of the Seiko batteries so I'll have them ready when needed.

I also wanted to share a quick tip: I used this tape: https://www.amazon.com/dp/B0D97W3MPZ to replace the one Sony had put on the top left side as part of the light leak recall. Just place the new tape in the same spot and it works perfectly. I tested my camera and there was no light leak. I

f you ever need to get to the sensor for dust cleaning, you’ll have to remove the tape, but you can either reapply it if it still holds or replace it with a fresh piece. Just make sure it does not obstruct the EVF pop-up.













Sep 26, 2025 at 03:29 PM
loudtiger
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p.2 #2 · Sony RX1R II Full Disassembly and Sensor Dust Cleaning Review


Amazing documentation and extremely useful. I could've used this last year!


Sep 26, 2025 at 04:03 PM
Fred Miranda
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p.2 #3 · Sony RX1R II Full Disassembly and Sensor Dust Cleaning Review


loudtiger wrote:
Amazing documentation and extremely useful. I could've used this last year!


I was the guinea pig! Now we know that cleaning the dust on the sensor is actually quite easy since the calibration shims don't even need to be touched.



Oct 02, 2025 at 10:31 AM
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