The power indicator "C" is a 5V power supply through a light-emitting diode and a resistor in series, the resistance can be any from 1K to 10K, and the indicator light can be cancelled.
The SATA signal definition is as follows:
1. GND Ground (grounded, generally connected to the negative pole)
2. A Transmit (data transmission positive signal interface) A+
3, A- Transmit (data transmission negative signal interface A-
4. GND Ground (grounded, generally connected to the negative pole)
5, B- Receive (data receiving negative signal interface) B-
6, B Receive (data receiving positive signal interface) B+
7. GND Ground (grounded, generally connected to the negative pole)
Because we are used to using the WD board, everyone has the most contact, so it is marked as the WD&x27;s flying point mark. "VG5321" represents the power supply\ground\B+\ B-\A-\A+, which means that the 4 signal wires of SATA are connected to the 4 flying points corresponding to the original USB board through the wires, and the connection is changed to SATA standard interface, power supply can be flying line or welding power supply is free when the original USB board power supply is normal, just connect the USB line.
Please note: whether it is to add an isolation capacitor or directly connect with solder, this description is marked on the figure: the upper and lower points are the upper and lower points between AB, and the E is the same.
Here, the AB welding hard disk can be welded with isolation capacitor or 0 ohm resistance. If it is welded, you can weld the flying lead at "B". If there is no welding, please weld at "A". (Note that the flying lead should be as short as possible and the line is long. There are distributed capacitors, and the isolation capacitors can be obtained from the original hard disk you want to fly.)
If you use 0 ohm resistor or direct tin connection in the box of "E", then the four places of 1\2\3\5 can be used for flying probes. (The actual test of the domestic flying needle is of poor quality and the needle swing is too time-consuming, meaningless);
Example detailed description:
Toshiba&x27;s 2TB hard drive is slow to recognize after being inserted into the USB. If this hard drive does not make any abnormal noise, most of it is a drive with bad sectors, as shown in the figure below:
The modified picture is as follows:
According to the picture, first remove the affected device, and then install the hard disk
Use the screw on the flying lead PCB to fix the flying lead PCB to the hard disk. First, we should first strip the cables to be used and plate them with tin. The shorter the cables, the better, and the longer the cables can be. it is good. Similarly, I want to solder on the "A" area of the flying lead PCB, so that the solder joints in the A "area" and the hard disk board are also tinned, as shown in the figure below.
The better the preparation for the front work, the easier it will be for the back. I personally use two data lines in a group, so that welding is easy, and it is considered a small isolation.
If the welder is not good, you can use tweezers to assist in the vertical welding. This depends on the individual, because this PCB board can be free of welding power and ground, just plug in the USB cable, as shown in the following two pictures:
After all is completed, it can be recognized by connecting the tool, as shown below:
SED can be understood as two kinds:
1. Firmware encryption ROM or module, such as Seagate 58 triangle board and above, you need to unlock the ROM to read and write the firmware. Others such as Western Digital 1961 and 800041 are in the ID (02 module). Editing the ID has the SED option. This requires the ROM to block SA Or block 02 and edit ID to remove SED, then the hard disk can be recognized normally and DE supports decryption;
2. The main control encryption, such as Western Digital 800067\800069\800041, etc. The main control of this board itself is encrypted, and the unlocking board needs to be replaced to read and write the firmware, and separate data.
In the second half of 2019, some of the new disk boards such as 800067\800069\800041\810035 have their own master encryption, and now they can only read and write firmware and split headers when replacing the unlocking board, because DE can&x27;t decrypt the data area and deal with firmware problems and split headers. After that, you need to change back to the original USB board. At this time, there is no need to decrypt the data for data (the value of the flying line PCB board). Seagate also has new models. The data area is abnormal after unlocking. This type of data can only be written back to the original ROM. Unlocking is also only suitable for handling firmware problems and splitting. AE AF series hard drives, you will find that there are more SED modules.
The main control encryption is nothing more than the manufacturer&x27;s same board written with different firmware, but it cannot be solved, so it has become the main control encryption.
There is a misjudgment, that is, for the new encryption problem
1 Not the original board, so the data still shows encryption
2 Has the customer added a password?
3 190 problem data has become 0. Both the decryption board and the original board output an encrypted state. If you look at some sectors, it should return the same. Then you can judge that the hard disk has become 0.
4 I have encountered it once. It is not the original board that cannot read the data area directly. ABR error is reported directly. This is because I only encountered it once.