L3+ U73 Step Down Module

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L3+ U73 Step Down Module
1 pcs $ 3.2

MOQ: 10 pcs Weight: 0.0025 KG

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Product description:

L3+ U73 Power Supply Step-down Board

Why use L3+ U73 power buck module?

If the L3+ power chip is damaged or there is no voltage in the voltage domain, the L3+ U73 module can be used for replacement. The L3+ U73 power buck board can be used in the L3+ 10V step-down circuit control, on the hash board with no material, serious oxidation, and lack of material. The module has a total of 8 external solder joints, 4 solder joints do not need to be soldered with wires, and can be connected to 3 external wires (the PIC cannot adjust the voltage) or 4 external wires (the PIC can adjust the voltage).

L3+ U73 power supply step down board

L3+ U73 Buck Module

1. GND: The negative pole of the power supply is grounded

2. 12V: 12V input

3. EN: Power on signal, connected to pin 3 of Q10

4. HG: Controlled by the upper MOS tube, connected to pin 4 of the upper MOS tube

5. LG: Controlled by the lower MOS tube, connected to pin 4 of the lower MOS tube

6. DAOUT: Connect to PIC, can accept PIC voltage regulation

7. FB(mos): Feedback input, connected to the large inductor L2, close to the MOS end

8. SW(out): Connect to the output terminal of the large inductance L2

U73 step-down board

U73 step-down module diagram

L3+ U73 module installation steps:

1. First remove the original IC U73, and use a multimeter to check whether the original 3 MOS tubes have any problems. The normal resistance of the large inductance L2 to ground is about 40 ohms.

2. Put the module on the inductor as above, connect the FB (mos) pad and the SW (out) pad to the inductor, and use an air gun and an electric soldering iron to dissipate heat.

3. Connect GND to the left side of capacitor C943, as shown above.

4. Connect 12V to the right side of capacitor C943, as shown above.

5. Connect the HG signal to the 4th pin of the MOS transistor Q5, as shown in the figure above, pay attention to check whether there is a short circuit.

6. Connect the LG signal to the 4th pin of the MOS transistor Q4, as shown in the figure above, pay attention to check whether there is a short circuit.

7. Connect the EN signal to pin 3 of Q10. If this pin is not connected, it is a forced power-on, which will cause the control board to fail to turn off the power supply of the hash board.

8. Remove the resistor R24, and connect the DAOUT signal to the position shown in the figure R24. If this signal is not connected, the PIC cannot adjust the voltage and can only work with a fixed voltage.

L3+ power supply step-down board

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Jim 2024/3/12 14:00:41
Q:Looking for either Hashboard repair or a new hashboard form my BM-K3 KDA 70Th miner

Jim
A:Hi Jim, you can contact our sales staff via WhatsApp (+8618623251355) and email ([email protected]) to obtain the latest product quotations. Thank you for your attention.
Matthew 2024/3/10 23:32:48
Q:I have 2 goldshell miners not working. I tried to troubleshoot but with no success. Can you help me repair them Is there a USA branch of your company I am on the East Coast. Let me know the process, thank you,
A:Hello, we do not provide repair services. You can find repair centers in the USA here https://www.zeusbtc.com/RepairCenter/USA/
Please note that we only provide information, please be careful to distinguish the authenticity. ZEUS MINING does not assume any responsibility for the repair center. Thank you for your attention.
Tonci 2024/3/7 15:04:12
Q:Hi, I am interested in buying cooling kit for antminer s19j pro 120 th miner. Please if you can send me quote. Thanks
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sadeq 2024/2/27 17:14:03
Q:hi

Power detect error, can not find config for power P21D, need P21E P222B P222C

this error for m31s by p21d and i udgarde it to last vertion so i can#39t solve it andi have this error again
please help me

A:Hello, you can contact our sales staff for help via WhatsApp (+8618623251355) and email ([email protected]). Thank you for your attention.
Stevengum 2024/2/24 7:45:39
Q: interesting for a very long time
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Mr Glowinski 2024/2/18 19:40:30
Q:Hello
I require four 2 pin fan simulators for my Antminer S21.
The current spoofers I bought from Nakamoto mining do NOT work.
Thank you
A:Hello, you can contact our sales staff via WhatsApp (+8618623251355) and email ([email protected]) to get the latest product quotations and details, thank you for your attention.
Mick 2024/2/15 10:14:31
Q:I need to purchase 1,000 to 2,000 fans.
Can you please provide me with a quote
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Agung Gunawan 2024/2/10 9:08:37
Q:Do you have service centre at Indonesia Let me know the contact and address.
Can you repair the iceriver ks3L or ks3M hashboard

A:Hello, sorry we do not have repair services, if you need other help, please contact our sales staff via WhatsApp (+8618623251355) and email ([email protected])
Andrew McNamara 2024/1/25 11:05:11
Q:Antminer s21 powercord, I#39m not paying 98$ when I only need one -
A:Hello, you can buy one. You can contact our sales staff through WhatsApp (+8618623251355) and email ([email protected]) to get product quotations and details. Thank you for your attention.
Waseem 2024/1/22 3:10:56
Q:Hello i am Waseem
From Libya
Do you repair Avalon miner T72 hashbords
And Avalon PSU 1246 T83
A:Hello Waseem, we are sorry that we do not have repair services. We have online repair training. If you need other help, please contact our sales staff via WhatsApp (+8618623251355) and email ([email protected])
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