How to Disassemble a DVR 70mai Xiaomi: instructions with photos and nuances

Video recorders 70mai Xiaomi has gained popularity through a combination of affordable pricing, high-quality shooting and reliability, but even the most reliable technology sometimes requires intervention, whether it’s replacing the battery, cleaning the lens or repairing after a fall. Disassembling the device is the first step in any of these cases, but you need to approach the matter carefully so as not to damage fragile components.

In this article you will find step-by-step instructions for disassembling registrars. 70mai (including the Pro models+, Dash Cam A500S, Omni and others, and the key nuances that are not covered in the standard manuals, we'll take a look at the tools, the typical bugs, and we'll give you tips on how to avoid damage. If you've never done any electronics, don't worry, with our manuals, even beginners can do it.

⚠️ Important: disassembling the device will void the warranty (if it is still valid). If the registrar is warranty, first contact the Xiaomi service center.

1. Disassembly preparation: safety tools and measures

Before you start a screwdriver, make sure you have everything you need, and the wrong tools are the main cause of damage to the body and the internal parts.

• 🔧 Plastic mediators or shoulder blades (to open the latches carefully), leave the metal tools for other tasks, they scratch the plastic.
• ⚡ Screwdriver. T5 or T6 (depending on the model. 70mai Torx screws are used T5, but in some series (for example, A800) may be caught T6.
• 🧲 A magnetic mat or a screw container, and it's easier than you think to lose a small cog, especially if you're taking it apart on the carpet.
• 📸 Smartphone to take photos of the process. Take a picture of the location of the parts before you take them off, this will save you from a headache when you build them.
• 🧴 Isopropyl alcohol (90%+) Cotton swabs – to clean the contacts, if necessary.

Also, prepare your workspace: a clean desk with good lighting, a bright light desk lamp is perfect, so you can see the details and avoid errors. If you take the recorder apart after you fall into water or dirt, dry it in rice or silica gel for at least 24 hours before opening it, and the moisture inside can short circuit when you turn it on.

⚠️ Warning: Do not disassemble the recorder if it is still connected to the lighter or charger. Even when it is off, there may be residual charge on the board that will damage the components if it accidentally closes.

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2. Removal of the front panel and lens

So, to start with the most prominent element, the front panel with the lens, the rule here is, don't put too much effort into it. If something doesn't work, you've missed a latch or a screw.

Algorithm of action:

1. Turn the recorder down on a soft surface (like a napkin) to protect the display from scratching.
2. Find the hidden latches around the perimeter of the front panel. 70mai They're located: 🔹 On the sides near the holder's mount. 🔹 Down below, under a rubber cap (if any). 🔹 Upstairs, next to the microphone.

Carefully tuck the panel with a plastic mediator, starting at one of the corners. Move around, gradually releasing the latches. If you hear a crack, stop and check if you missed the screw.

When you take it off, put it aside, and underneath it you'll see a lens mounted on a metal frame, and in most models, it's locked with 3-4 screws. T5.

⚠️ Critical detail: Do not touch the glass of the lens with your bare hands - fat marks will worsen the quality of the shooting. If you need to clean the lens, use a special napkin for optics and alcohol solution (but do not overdo it - aggressive cleaning can damage the coating).

3. Unconnection of plumes and removal of motherboard

After removing the front panel, you will see the motherboard to which you are connected:

• 📺 Display plume (thin tape cable).
• 🔋 Battery wires (red and black).
• 🎤 Microphone plume (in some models).
• 📡 antenna GPS/GLONASS (if any).

To charge, take the following steps:

1. Unplug the battery. To do this, unscrew the battery locking screws (usually 2 pieces). Carefully tuck the power connector into a plastic blade. Don't pull the wires!

Turn off the plumes. They're attached with latches (black or white plastic clips), lift the locker up with a screwdriver, then pull the plume out.

Unscrew the screws that hold the board (usually 4-6 pieces). In some models, the speaker is hidden under the board - do not lose it when you remove it.

⚠️ Warning: If the recorder was not turned on before disassembly, do not connect the battery to the board without diagnosis. First check the charge for burnt elements (blackened or bloated parts).

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If you're disassembling a battery replacement recorder, take a picture of the plumes and screws before you disconnect.

Replacement of the battery: selection and installation

Battery is the most common "consumer" in video recorders 70mai. The average lifespan is 2-3 years, and then the capacity drops by 30 to 50 percent, and the device starts to spontaneously shut down:

• ⚡ Fast discharge (less than 30 minutes of battery life).
• 🔄 Turns off when vibrating (for example, on bumps).
• 🌡️ Overheats during charging.

- time to change the battery.

How do you choose a replacement? Original batteries 70mai It is difficult to find, but there are proven analogues:

• 🔋 For models Pro/Pro+: Battery 3.7V 320mAh plug-in JST 1.25mm (Like Bakery. BL-5C oral).
• 🔋 For A500S/A800: Battery 3.7V 500mAh Rechargeable (seek with labeling) PCB).
• 🔋 For Omni/Midrive D06: Capacity 3.7V 600mAh, Check the size – the body may not close!

Replacement process:

1. Remove the old battery (if soldered) or disconnect the connector.
2. Install a new battery while observing polarity (red plus, black minus).
3. Secure it with bilateral tape or tape (so that it does not dangle when vibrating).
4. Connect the plumes and check the work without closing the case - if the registrar does not turn on, check the contacts.

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After replacing the battery, be sure to calibrate the battery: completely discharge and charge the recorder 2-3 times.

5. Cleaning the lens and sensors: how to return the clarity of shooting

Over time, dust, grease and dirt settle on the lens and infrared sensors (in the nighttime models) and this leads to:

• 📸 Blurred image (especially noticeable at night).
• 🌃 Poor night mode (IR illumination "blinds" the camera).
• 🔍 Artifacts in the video (dots, divorces).

How do you clean properly?

1. lens: Use a microfiber napkin and an alcohol solution (70-90%). Move from center to edge in light circular motions. Don't push!
2. IR filter: In models with night photography (for example, 70mai Pro Plus) is an IR filter underneath the lens, and you can take it off with a plastic blade and wipe it on either side.
3. Motion Sensor: Located next to the lens (small window) and wipe it with a dry cotton swab, the alcohol can damage the coating.

⚠️ Attention: If the image becomes worse after cleaning (divorce or turbidity), then you have damaged the lens coverage.

6. Assembly of the registrar: how to prevent errors

It seems easier to assemble a recorder after a dismantling than to disassemble, but this is where most of the mistakes are.

• 🔄 Follow the reverse order (starting with the motherboard and ending with the front panel).
• 🔧 Don’t pull over the screws – plastic can crack.
• 📋 Check the plumes after connecting (they should sit tight, without distortions).

Typical errors in assembly:

After assembly:

1. Connect the recorder to the charger and check if it is turned on.
2. Record a test video to make sure there are no artifacts.
3. Check the operation of all buttons and sensors.

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If the recorder doesn't turn on after assembly, don't panic. Turn off the battery, wait 5 minutes and reconnect. Sometimes the board takes time to "reboot" after manipulation.

7. Frequent breakdowns and their causes

If you take a look at the recorder, you can find some common malfunctions.

• 🔥 Burned voltage stabilizer (blackens and swells) Caused by a power surge in the lighter or a poor-quality cable.
• 💧 Oxidized contacts (green coating) Cause: ingress of moisture (for example, after washing the car).
• 📶 The fallen antenna GPS. Cause: shock or vibration.
• 🔋 Bloated battery, cause: overheating or deep discharge.
• 🎥 Cracked lens, cause: fall or pressure on the glass.

Can I fix it myself?

• ✅ Replacement of the battery, cleaning contacts, replacement of plumes - under the power of beginners.
• ⚠️ Interpling chips, replacing the lens - requires experience and soldering station.
• ❌ Repair of the motherboard (replacement of memory chips, processor) - it is better to trust the service.

If you're not confident, you can estimate the cost of repairs, and sometimes it's cheaper to buy a new registrar than to repair an old one, 70mai Pro+ in 2026 it costs about 3-4 thousand rubles, and the repair of the fee can cost 2-3 thousand.

8.Repair alternatives: When is it easier to buy a new registrar

Disassembly and repair are not always justified, but here are the times when you should consider buying a new device:

• 💸 The cost of repairs exceeds 50% of the price of the new registrar.
• ⏳ The model is outdated (e.g, 70mai 2018 Pro does not support modern video formats).
• 🔧 Critical breakdown (burned motherboard, cracked glass display).
• 📉 No spare parts (e.g. for early Midrive models).

If you are considering buying a new registrar, please note:

• 📹 Video resolution: minimum 1080p@60fps or 1440p comfortable-looking.
• 🌃 Night Shooting: Look for models with Sony Starvis or OmniVision sensors.
• 🔄 Buffer memory: at least 256 MB for recording in a loop.
• 📡 GPS/GLONASS: useful for fixing speed and coordinates.

Among the current models 70mai in 2026, they stand out:

• 70mai A810 — 4K, Sony IMX415, support ADAS.

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If your old registrar is still working but is morally outdated, consider selling used. 70mai Pro 2019 can be sold for 1.5-2 thousand rubles.

FAQ: Answers to Frequent Questions