描述

Antminer S19 XP hash board Repair Kits 

1. BM1366AL Hash board ASIC chip for Antminer S19XP and S19XP Hydro Miners
2. BM1366AG Hash board ASIC chip for Antminer S19XP and S19XP Hydro Miners
3. Upgrade your Antminer S19XP hashboard with the SGM8304 operational amplifier module. Improve mining efficiency and performance
4. BA1U 0.8V LDO Chip for Antminer L7 and S19xp Hash Board
5. Antminer S19XP Tin Tool
6. 1SMB5924BT3G 3W 9.1V patch Zener diode 924B Silkscreen for Antminer S19XP Hash board
7. 47uF 50V SMD High Performance Capacitor for Antminer S19+ S19xp Hash Board Replacement
8. Marking 1R80 SMD 1206 High-Quality Resistor for Antminer S19 S19xp Hash Board
9. DSK24 Marking K24 2A 40V High Performance Schottky Diode for Antminer S19J PRO and S19XP Hash Board
10. Antminer C87 Control Board for Antminer L7 S19 Series Miners
11. Marking G337 2V T520V337M004ATE012 Tantalum Electrolytic Capacitor for Antminer Hash Board
12. MP2019GN Marking MP2019 LDO Voltage Regulator 40V LQ Current Adjustable Output Linear Regulator for Antminer S17 T17 S19 T19
13. SN74AUP1T34DCKR Marking U2E High Performance Voltage Level Shifter for Antminer S19 and L7 series Hash board
14. SN74LVC1G126DCKR Marking CN5 CNF Signal Voltage Conversion Chip for Antminer 19 series Hash board
15. S19XP Test Fixture
16. Solder Paste
17. GEL
18. Original DF1203812B2UN 12V 2.7A 4Pin 6000RPM Cooling Fan

Antminer S19XP hash board Repair Kits 

1. Platform requirements:

Anti-static repair workbench (the workbench needs to be grounded), the repairman must wear anti-static wrist straps.

2. Equipment requirements:

(1) Constant temperature soldering iron (350℃-380℃/662F°-716F°), pointed iron head is used for soldering small chips such as chip resistors and capacitors.
(2) Heat gun and heating platform (350℃-400℃).
(3) BGA repair workbench is suitable for chip / BGA disassembly and soldering.
(4) Multimeter (Fluke 17B+ is recommended) is equipped with a welded steel needle and a heat-shrinkable sleeve for easy measurement.
(5) Oscilloscope (UTD2102CEX+ oscilloscope is recommended).
(6) Network cable (Requirement: connected to the Internet, stable network).

3. Test tool requirements:

(1) Use the APW12 power supply (APW1212V-15V and power adapter cable) to build a test platform: Use thick copper wires for the positive and negative poles of the power supply, and then connect the PSU and the hash board. It is recommended to use 6AWG copper wires with a length of less than 60cm for the hash board powering.
(2) Use the test fixture of the V2.1010 control board (its model is ZJ0001000001), the positive and negative poles of the power supply of the test fixture need to be installed with a discharge resistor, and it is recommended to use a cement resistor of 25 ohms and above 100W.

4. Repair auxiliary materials:

Solder paste M705, flux, board washing water, absolute alcohol, thermal conductive gel, ball planting steel mesh, solder absorbing wire, solder ball (ball diameter recommended 0.4mm)
(1) Circuit board cleaning solution is used to clean up the flux residue after maintenance
(2) Thermally conductive gel (specification: FujipolySPG-30B) is applied on the surface of the chip after maintenance.
(3) When replacing the chip, it is necessary to plant tin on the pins of the chip first, and then solder it to the hash board. Apply heat-conducting gel evenly on the surface of the chip and then install the large heat sink.

5. Repair auxiliary tools:

(1) Scanning gun: recommended ZD2200 Wired Scanner
(2) Adapter board RS232/TTL adapter board 3.3V
(3) Self-made short-circuit probes are soldered with needle wires, need to add heat-shrinkable sleeves to prevent short-circuiting between the probes and the small heat sink.
6. Common maintenance spare material requirements: 0402 resistors (0R, 51R, 10K, 4.7K), 0402 capacitors (0.1uF, 1uF).

II. Job Requirements

1. Maintenance personnel must have certain electronic knowledge, more than one year of maintenance experience, and be proficient in BGA/QFN/LGA packaging and soldering technology.
2. After maintenance, the hash board must be tested twice or more and the results are 0K, in order to pass!
3. Pay attention to the soldering technique when replacing the chip. After replacing any accessories, the PCB board will not be deformed. Check the replaced parts and surroundings for missing pieces, open circuits and short circuits.
4. For the test of chip maintenance and replacement, it is necessary to detect the chip first, and then do a functional test after passing. The functional test must ensure that the small heat sink is soldered well and the large heat sink is installed in place (each thermal conductive adhesive must be applied evenly before installing the large heat sink). And the cooling fan is at full speed. To use the chassis for heat dissipation, two hash boards must be placed at the same time to form an air duct. The single-sided test of production must also ensure the formation of an air duct (important).
5. When powering on the hash board, you must first connect the negative copper wire of the power supply, then the positive copper wire of the PSU, and finally insert the signal cable. When disassembling, the order of installation must be reversed, first remove the signal cable, then remove the positive copper wire of the power supply, and finally remove the negative copper wire of the power supply. If you do not follow this order, it is very easy to cause damage to U1 and U2 (not all chips can be found); Before testing the pattern, the repaired hash board must be cooled down before testing, otherwise it will result in testing PNG.
6. Determine the maintenance station object and the corresponding test software parameters and test fixtures.
7. Check whether the tools and test jig can work normally.
8. The fan plays a cooling role when measuring the signal, and it is necessary to keep 4 fans running at full speed.
9. When replacing a new chip, clean the pins and apply solder paste to ensure that the chip is coated with tin before soldering.