Hello everyone,
I am building a project with a DF player and a GF1002 (based on PAM8403). The problem I have right now is that by pressing the play button on the DF player, there is no sound, however the GF1002's IC is heating up. I have attached my current wiring diagram.
This scheme worked before I hooked everything on a PCB, which probably have destroyed my previous GF1002 (+ and - were shorted) - it also heated up.
However now I have brand new both DF player and the GF 1002. When I connect only 1 speaker to DF player (to pins SPK1 and SPK2), it works.
What have I done wrong?
I am building a project with a DF player and a GF1002 (based on PAM8403). The problem I have right now is that by pressing the play button on the DF player, there is no sound, however the GF1002's IC is heating up. I have attached my current wiring diagram.
This scheme worked before I hooked everything on a PCB, which probably have destroyed my previous GF1002 (+ and - were shorted) - it also heated up.
However now I have brand new both DF player and the GF 1002. When I connect only 1 speaker to DF player (to pins SPK1 and SPK2), it works.
What have I done wrong?
Attachments
Hi Inspector,
A priori your connections seem right.
I do not know the DF and if the output signal may have a DC level as well. If so, that may be the problem.
The way I would go is to disconnect the DF from the amplifier. Then, use the headphone output of your SmartPhone as source to your amplifier. This way we can make sure the amplifier works. It must not become hot.
When you have done this test and if the amplifier works, we start looking at the DF.
A priori your connections seem right.
I do not know the DF and if the output signal may have a DC level as well. If so, that may be the problem.
The way I would go is to disconnect the DF from the amplifier. Then, use the headphone output of your SmartPhone as source to your amplifier. This way we can make sure the amplifier works. It must not become hot.
When you have done this test and if the amplifier works, we start looking at the DF.
I tried it, no luck. No audio, but overheating. I tried to connect the speakers directly to the phone and it worked. This is weird. I will now try to test another amp board.
The PAM 8403 has no output filter so you can try it without input signal and without speakers. With only power if it still gets hot, the chip is either defect or you have made a short-circuit when you soldered the wires. The insulation distances are small.
I have double checked both new amps I got, they are not shorted (plus doesn't connect to minus), buy they both overheat. I think I should I consider some other small amp board for my project.
Have you checked if one of the output wires are connected to either ground or supply line? Or the output wires seem to be shorted?
Well, looks like a ground issue from the source then i guess. Btw. Is it equal which channel you use at the amp for one speaker only?
Yes, normally power-GND is used as signal-GND as well.
It is more important to check (without power) that all four output lines are not connected to neither GND, nor supply-line. Output lines and power supply lines can make the chip pull high current such that the chip heats up.
It is more important to check (without power) that all four output lines are not connected to neither GND, nor supply-line. Output lines and power supply lines can make the chip pull high current such that the chip heats up.
Do you use ground on the speakers? If so, don´t. You will short the amp.
Often it is considered the minus speaker line is the same as ground, which is wrong. So do not ground speaker minus (-).
Often it is considered the minus speaker line is the same as ground, which is wrong. So do not ground speaker minus (-).
Power supply voltage too much.check the power supply voltage at idle .......may be 5.7v (do not exceed 5v)
I have had a similar problem - I crocodile clipped the power and left in and left speaker connections maybe there was a short circuit, which is why I will be going for boards with pre-connected output pins instead of having to solder these.
The entire board gets very hot, the chip gets very hot as well. Very disappointing. No sound out of the speaker. Every instruction I see says do not connect the output grounds. Maybe I did.
https://www.instructables.com/PAM8403-6W-STEREO-AMPLIFIER-TUTORIAL/
The entire board gets very hot, the chip gets very hot as well. Very disappointing. No sound out of the speaker. Every instruction I see says do not connect the output grounds. Maybe I did.
https://www.instructables.com/PAM8403-6W-STEREO-AMPLIFIER-TUTORIAL/