Has anyone been experiencing issues with Lenovo's USB-C IC (SN2001024YBGR)? I have had three separate laptops with the same part getting over 100 degrees on the thermal scope this week. If you are familiar with this laptop, could you please lend me some help in troubleshooting the charging circuit? I also have been having the same issue with another laptop which is the same chip but its a Lenovo Thinkpad E15 Gen 2.
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Not directly familiar with this model but power delivery is the same across the USB Type C platforms.
Would you have a USB Type C meter? What is the voltage and current draw by this logic board? Are you using a known good USB Type C power adapter? Have you tested with other power adapters?
Remove all power -> meter in resistance mode -> measure the resistance to ground of the power rails on this USB Type C power delivery controller.
A low resistance here is usually bad news.
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I will get back to you as soon as possible, sorry for the delay. Things get hectic at the shopComment
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And six months later....
I suggest, before removing UT1, check U7, U9, <UT3>(<Short on pins 6,7,8>) and <PU501>(<>low resistance and enablers). Check if there is a short in <PJ303> (PU301 shorted or U7,U9).
The points above also cause the IC KB9052Q to short out, or even damage it. In my case, they were all damaged.Comment
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