1
00:00:06,666 --> 00:00:10,500
Find a clean dust-free cloth and wrap the chip inside the cloth
2
00:00:12,900 --> 00:00:15,333
Wait for it to cool completely before cleaning
3
00:00:15,933 --> 00:00:21,166
Because the chip is still relatively hot, if you suddenly wash it with PCB cleaner
4
00:00:21,800 --> 00:00:25,066
Cooling down too fast may cause the chip crystal to break
5
00:00:25,866 --> 00:00:28,333
We'll wait for it to cool completely before cleaning
6
00:00:28,766 --> 00:00:31,300
Cover the surface with a cloth and brush
7
00:00:34,300 --> 00:00:37,966
Use the dust-free cloth to stick out the dirt in this hole
8
00:00:50,366 --> 00:00:53,266
Check again to see if there is any dirt in the hole
9
00:00:54,133 --> 00:00:58,766
If there is dirt, we will use a sharp blade to pick it up again
10
00:01:00,300 --> 00:01:04,133
There is a hole in this area with a black glue block in it
11
00:01:05,100 --> 00:01:06,500
Pick out with the blade
12
00:01:13,200 --> 00:01:16,066
There are some bits of solder slag on the side
13
00:01:19,900 --> 00:01:21,633
It doesn't have much impact
14
00:01:22,100 --> 00:01:24,066
Because we'll be reballing later
15
00:01:28,100 --> 00:01:30,600
Mainly to see if there is glue in the hole
16
00:01:34,800 --> 00:01:37,966
After cleaning, we flatten the solder on the back
17
00:01:44,800 --> 00:01:48,200
This step must be before the middle layer of reballing
18
00:02:05,733 --> 00:02:10,433
When flattening the solder, pay attention to do it on this silicone pad
19
00:02:11,133 --> 00:02:14,333
The silicone pad can give it a heat dissipation effect
20
00:02:21,333 --> 00:02:23,300
Next we clean the chip again
21
00:02:41,900 --> 00:02:43,166
Almost cleaned up