How To Diagnose and Repair an IR Remote Control
Ғылым және технология
Not specifically amateur radio related but perhaps still of interest.
Most existing 'howto' videos seem to either a) only clean the contacts or b) totally butcher both the cases and the PCBs with little thought regarding actual failure modes or diagnosis.
In summary:
Check for IR LED illumination (most mobile phone cameras are IR sensitive)
Does LED illuminate?
Yes - clean key contacts and investigate reservoir capacitor
No - investigate possible dry joints or IR LED failure.
ADDITIONALLY:
I didn't mention the ceramic resonator as I haven't personally seen a failure. However I've been told this does happen. If you get zero or poor output - it's also worth checking the resonator.
In all cases, a scope will greatly assist in investigating both the IR remote and receiver. In this case, and lacking a scope - it looks like the receiver at fault.
Пікірлер: 4
I suffered an issue where the plastic in front of the receiver led had fogged up with old age. I popped the plastic for this out leaving a hole and this fixed the issue.
Nice one - I’m doing videos on basic repairs too but not uploaded much yet- the basic tip of holding a remote to a camera is something useful, one of my first tests and some cameras e.g iPhone have IR filters but the face camera doesn’t. Another tip is using white vinegar and corrosive batteries , sometimes remotes can’t be saved from leaking batteries
I have a cheap GoPro knockoff that I’ve removed the IR filter from the sensor. It displays IR signals nice and bright on the lcd display
I have an issue like the IR blaster stays on all the time and if a button is pressed the IR turns off...this has happened after a incident of battery leak, and now I'm not able to operate the SONY home theatre DVD. Can anyone shed light on this issue.