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Disassembling Qingping Air Monitor Lite CGDN1

Introduction

After +/- 3 years of 24/7, the fan of the particle meter has worn out. The fan is making a terrible noise.

What you need

  1. Disassembling Qingping Air Monitor Lite CGDN1, Remove screen: step 1, image 1 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Remove screen: step 1, image 2 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Remove screen: step 1, image 3 of 3

    • When removing the screen with the suction handle and a jimmy be very careful at the right side of the screen and don't damage the connection like I did (see red circle).

    • Carefully remove the screen towards the front. The screen is glued with some tape (see the orange marker).

    • Maybe use some heat to soften the clue.

    • I used a combination of a suction pad and Jimmy.

    Edit

  2. Disassembling Qingping Air Monitor Lite CGDN1, Remove screen backing plane: step 2, image 1 of 1

    • 2 Philips screws are holding the backing plane of the screen

    Edit

  3. Disassembling Qingping Air Monitor Lite CGDN1, Disconnect screen: step 3, image 1 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Disconnect screen: step 3, image 2 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Disconnect screen: step 3, image 3 of 3

    • Lift the small black ledge to remove the flat cable of the screen. Orange circle

    Edit

  5. Disassembling Qingping Air Monitor Lite CGDN1, Remove main PCB: step 4, image 1 of 2 Disassembling Qingping Air Monitor Lite CGDN1, Remove main PCB: step 4, image 2 of 2

    • Disconnect the flat cable of the touch sensor by lifting the little black ledge, see the orange circle.

    • One screw holding the PCB, green circle

    Edit

  6. Disassembling Qingping Air Monitor Lite CGDN1, Open the back: step 5, image 1 of 2 Disassembling Qingping Air Monitor Lite CGDN1, Open the back: step 5, image 2 of 2

    • 4 Philips screws hold the back in place.

    • You'll need a very long/narrow bit to reach these screws!

    Edit

  7. Disassembling Qingping Air Monitor Lite CGDN1, Remove sensors & battery: step 6, image 1 of 1

    • You can slide the complete inner parts to the front.

    Edit

  8. Disassembling Qingping Air Monitor Lite CGDN1, Dismanteling the PM sensor: step 7, image 1 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Dismanteling the PM sensor: step 7, image 2 of 3 Disassembling Qingping Air Monitor Lite CGDN1, Dismanteling the PM sensor: step 7, image 3 of 3

    • Sensor is held by the 10 pin connector

    • Don't let the springs jump away

    • By slightly bending the cover you can lift the cover from the sensor housing

    • 5 little philips screw hold the sesnor PCB in place. To access the fan connector you have to remove the pcb

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

4 other people completed this guide.

Author

with 2 other contributors

rkuijer

Member since: 06/09/15

226 Reputation

1 Guide authored

Badges: 6

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5 Guide Comments

Thank you for the guide! The part number for a replacement sensor appears to be PMS7003. There are some minor cosmetic differences but it appears to function correctly. I would suggest conducting a calibration routine / making sure the sensor is exposed to exterior air a few times over the next few days.

ironeagl - Reply Share

Do you know whether the Air Monitor works when removing the battery? My air monitor is constantly running hot (temperature shown is ~3 Degrees higher than room temperature and I suspect a bad battery to be the culprit. It also only holds a charge for few minutes after disconnecting from power. I'd like to remove it for peace of mind and also to be able to use the temperature sensor again.

Stokel - Reply Share

Yes it works with disconnected battery.

Georgy Aleksanenkov - Share

Did you ever try that in the end? Mine also is running warmer even though the battery seems to be ok, but I'm thinking of taking it out so that device doesn't heat up as much.

Daniel - Share

What is the exact name of the battery type, so I can get a replacement?

My 1.5-year-old Qingping Air Monitor Lite works fine when plugged in to USB, but shuts off immediately when disconnected and it fails to turn on after holding the power button on the back of the unit, while disconnected from USB, which would turn it on a few months ago.

Neil - Reply Share

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