# Regular Meeting (2023.5.15) * Repaired a board * Function is no problem * The same to previous I did one (Measured wavefrom) * Has a problem: Temperature is too high on type C connector * Measure fanout board with sinusoid wave ## Repaired a board * Issue come from: * https://hackmd.io/@BelleII-CDC-Trig-NTU-DeWei/H1R4de3W3 * Type C pin fault because of tin blocked hole * How to repair * Using new [percision heat gun](http://www.tekserve.com.tw/soldering/rmse-rmve/) * Temperature (Test about 15 minute) * Normal one * ![](https://i.imgur.com/RBqmJIS.png) * Fixed one * ![](https://i.imgur.com/IiZjRey.png) ## Measure fanout board with sinusoid wave ### 1.5Vpp, test point: output of OP-AMP * Test point * ![](https://i.imgur.com/Y0u1MXV.png) * 10M * ![](https://i.imgur.com/qdfwjmH.png) * 1M * ![](https://i.imgur.com/7vFbKR7.png) * 100k * ![](https://i.imgur.com/qC7NFfJ.png) * 10k * ![](https://i.imgur.com/mgI6Twv.png) * 1k * ![](https://i.imgur.com/FCsIEaT.png) ### 1.5Vpp, test point: divide point of 50 ohm resistor * Test point * ![](https://i.imgur.com/IXdSwpC.png) * 10M * ![](https://i.imgur.com/xmQ7t0g.png) * 1M * ![](https://i.imgur.com/yA7kAJg.png) * 100k * ![](https://i.imgur.com/2kj3TBe.png) * 10k * ![](https://i.imgur.com/wgeLyH0.png) * 1k * ![](https://i.imgur.com/MAjJBKd.png) ###### tags: `Regular Meeting` `DeWei`