If the multimeter says there is 5v in pin#1 and 3.3v in pin#8 then the chip is working fine and there is no reason to solder the wire In the original design that rails have 3.3v but when you solder the wire to 5v all that components are going to be feeded with 5vĪnway, the first thing you need to do is to meassure the voltage with a multimeter in pin#1 and pin#8 of mitsumi 463A chip In few words, i think is a bad idea and could be dangerous, as you can see in the third link that rails are connected to other components (and we dont know how many more components are connected to that rails). In other words, it connects votage IN with voltage OUT (rail 1) Click to expand.After a better inspection of the images i can confirm the chip is actually a Mitsumi 463A voltage regulator, and the wire is bridging pin#1 (5V_EVER) with pin#8 (3.3V_EVER_A)
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