Terrible noise (fan). How to open and fix device?
Hi there,
I bought a “Cleargrass” air quality tester from China:
Great device (while it worked), great build quality. See https://qingping.co/air-monitor/overview (Google translate helps with the Chinese) for more details.
A few days ago, it started to make terrible noise:
I guess it’s an internal fan. The device has a particulate matter air quality sensor. The way it works is: sucks in air and counts particles via laser reflection. So it definitely has a fan that’s also visible here in the explosion chart and video:
The device looks really solid and has no visible screws.
Two questions:
- Any idea how I might be able to open it?
Is it glued together? Would that mean: put a hair dryer at the back of the device and try to pull off the lid on the back (see explosion chart)
- If I can open it, do I have a chance to fix the fan, as it seems to be a whole sensor module from the explosion chart.
Would appreciate any help. It’s a great device but the noise is terrible. Would be a shame if I had to throw it away.
Thanks,
Holger
No idea how to open it, I don’t even see a way to open it:
(And FYI: I sent the Chinese manufacturer an email, but no answer)
—-
Update: removed back lid:
좋은 질문 입니까?
댓글 3개
Thanks, the back was clipped in indeed. But removing the back lid kind of lead to a dead end: (see last picture in the original post)
So I'm afraid I need to open the device from the front.
My best guess would be that the glass LCD is glued on and I need to remove it - but then again I have hardly any experience with repairing modern electronic devices.
Any educated guess from you guys?
Would that mean as next steps:
- heat up LCD
- pry off screen / try to pull off heated LCD with a suction handle ?
Holger Mayer 의
Hi,
Did you look under the "feet" shown in the 2nd last image above to check if there are any screws there holding it together?
Looking at the image of the exploded view of the product (3rd image down), when you look at it closely there appears to be 2 "threaded" type tubes?? shown on the bottom casing (for screws maybe?), that may line up with the feet position.
Worth a look anyway
jayeff 의
I have the same problem. How you managed to open it? From the back?
Mada 의