Hi I’ve built a PGA2311 kit purchased on eBay. All works except I cannot decrease the volume using the remote control. All works fine with the rotary encoder. Any ideas?
Still a film protector behind the battery? Pictures? You want an answer and we have to find the problem so it is courtesy to deliver as much information as possible.
Tis is the schematic
https://ae01.alicdn.com/kf/HTB1QwNfaELrK1Rjy0Fjq6zYXFXad.jpg
and this is the item purchased
https://ae01.alicdn.com/kf/HTB1xKJdasfrK1Rjy1Xdq6yemFXa4.jpg
https://ae01.alicdn.com/kf/HTB1QwNfaELrK1Rjy0Fjq6zYXFXad.jpg
and this is the item purchased
https://ae01.alicdn.com/kf/HTB1xKJdasfrK1Rjy1Xdq6yemFXa4.jpg
The one on that advertising picture probably works fine. A picture of the one not working (i.e. your specific device, the one you have in front of you) seems logical. The backside of the PCB is also of interest. Also logical is a picture of the remote and then particularly the battery compartment.
Let's do it with some system, please reply with the same numbers:
1. Did you already check the battery to give 3V?
2. Did you test with another CR2023 battery?
3. Did you check for the protective and isolating film as usually delivered with Chinese remote controls? It serves to preserve battery life and prevent unwanted operation during transport.
4. The remote control does not work at all or is just the volume control not working?
Let's do it with some system, please reply with the same numbers:
1. Did you already check the battery to give 3V?
2. Did you test with another CR2023 battery?
3. Did you check for the protective and isolating film as usually delivered with Chinese remote controls? It serves to preserve battery life and prevent unwanted operation during transport.
4. The remote control does not work at all or is just the volume control not working?
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Use your scope to look at the output of the IR, it could be at the LED driver on the remote and/or the receiver to see if it is sending out the code.
I've also checked by pointing my iphone camera at the remote and there is no IR signal on VOL-. All ok on the other buttons
What sometimes happens with the thin and flexible
PCB material as used in remote controls is a very thin crack in a PCB track. That can easily be measured with a DMM. When you scratch the coating off the PCB track and solder a very thin wire over the crack it works again. A single wire from a litze/stranded cable is enough.
If there is a real switch for VOL- then it can be measured as well. When it measures 0 Ohm when pushed the PCB track is the next to be measured.
PCB material as used in remote controls is a very thin crack in a PCB track. That can easily be measured with a DMM. When you scratch the coating off the PCB track and solder a very thin wire over the crack it works again. A single wire from a litze/stranded cable is enough.
If there is a real switch for VOL- then it can be measured as well. When it measures 0 Ohm when pushed the PCB track is the next to be measured.
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Had it recently with a DAB+ tuner remote control. The crack was impossible to see. If the "switch" is the PCB tracks shaped as forks with carbon on them and a carbon rubber pushbutton please beware not to clean these with a fluid. Also don't scratch these but leave them.
Make sure you have very thin bare copper wire without shellack or enamel on it. Press it with tweezers as it will stick to the soldering tool otherwise.
Make sure you have very thin bare copper wire without shellack or enamel on it. Press it with tweezers as it will stick to the soldering tool otherwise.
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NO! Leave the forks alone but check the PCB tracks beginning at the forks and the end of the track. You will notice (I hope) that there are 2 half forks so 2 PCB tracks with 2 end points. If you solder the forks to eachother it will be the same as continuous pressing of the button...but IF tone of the PCB tracks is cracked still nothing will happen 🙂 And if you then find the crack and solve it then VOL - will be continuously pressed... Simple logic.
The often occurring error is a very tiny crack causing discontinuity of the copper track. Then one can press the button to connect both half forks as hard and as much as one wants but nothing will happen.
If this all is too complex please don't bother.
The often occurring error is a very tiny crack causing discontinuity of the copper track. Then one can press the button to connect both half forks as hard and as much as one wants but nothing will happen.
If this all is too complex please don't bother.
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