---
# System prepended metadata

title: Regular Meeting (2023.5.15)
tags: [Regular Meeting, DeWei]

---

# 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`