3118 help
Been running two 3118 boards from same ps for approx 10 hrs of and on with 19V 2.45 amp PSU and totally love the sound. I have tda2497, 3116d2, 3116d2 2.1, 2020a+, and like them all but 3118 mono is my favorite. It is running thru overnight sensations. I went to power up this morning to listen to Diana Krall but the speakers just pop out and in in rythm, left right left right in out until I unplug it. I have tripple checked wires and run it of 12V x 5 hour batt. Any idea what is causing this? The board has a "mute " position next to the PS solder pads but I don't know what to do with those 2 solder points. Before this morn it just had a mild pop on with star up and a slow power off with red LEDs staying lit for a few seconds after unplug. Thanks, I have two more boards but want to know what is wrong as I have a portable boombox build coming up for these and don't want to repeat. Seams odd for both mono amps to go out at exactly the same point. Ran fine for 4-5 hours yesterday????
Been running two 3118 boards from same ps for approx 10 hrs of and on with 19V 2.45 amp PSU and totally love the sound. I have tda2497, 3116d2, 3116d2 2.1, 2020a+, and like them all but 3118 mono is my favorite. It is running thru overnight sensations. I went to power up this morning to listen to Diana Krall but the speakers just pop out and in in rythm, left right left right in out until I unplug it. I have tripple checked wires and run it of 12V x 5 hour batt. Any idea what is causing this? The board has a "mute " position next to the PS solder pads but I don't know what to do with those 2 solder points. Before this morn it just had a mild pop on with star up and a slow power off with red LEDs staying lit for a few seconds after unplug. Thanks, I have two more boards but want to know what is wrong as I have a portable boombox build coming up for these and don't want to repeat. Seams odd for both mono amps to go out at exactly the same point. Ran fine for 4-5 hours yesterday????
No batt fine. Causes driver to pop in and out just live with the 19v PSU, so not the PSU, removed inputs wires and still maxing out the drivers? It ran fine yesterday, no change but problem as described today. How is the two mute holes/solder joins utilized?
TPA3118D2
Just short the two pins for mute. Without mute there's possibly a short at the output. So measure the outputs for short, out+ to out- and each to ground and supply rail. Other possibility is lifted bootstrap caps and burned output filter resistors, if your board have an output filter. Did you powered the board without speakers once? What's idle power consumption?
Never use these boards without a speaker connected, as this may damage the output filter, most likely the output filters snubber. Resistor+Capacitor to ground.
Just short the two pins for mute. Without mute there's possibly a short at the output. So measure the outputs for short, out+ to out- and each to ground and supply rail. Other possibility is lifted bootstrap caps and burned output filter resistors, if your board have an output filter. Did you powered the board without speakers once? What's idle power consumption?
Never use these boards without a speaker connected, as this may damage the output filter, most likely the output filters snubber. Resistor+Capacitor to ground.
Wow, too fasts for me. Just solder a jumper wire to both holes marked mute? I don't know how to check outputs for short? Use my multimeter set to DC and touch to POS and neg on outputs on board? Neg probe to neg output and + to +? Would read what number? Ground and supply rail? The neg input solder point and the POS input silly solder point? I may have run without speaker attached for a brief second, but not while playing fine yesterday, or after? Sorry I am not electronics guy, I am learning slowly though. Thanks doc
Well I put a jumper wire from one hole to the next on the mute positions and no more rythmic pop in and out but also no music from input- a cell phone streaming pandora
That's why it is labeled "mute", it shuts down the amp, so no more music until unmuted - the connection is meant for a switch or external control input.
Oh, now I feel like an idiot! I thought it was a delay for power on to eliminate pop? Hard for me to understand instructions from Chinese version of english
For shorts you set your multimeter to resistance/ohms and measure the outputs. If it read 0, there's a short.
Out+ to Out-
Out+ to Vcc (supply voltage)
Out+ to Gnd
same for Out- and then for both channels.
Measurements taken without power and/or speakers connected, just the bare board.
Out+ to Out-
Out+ to Vcc (supply voltage)
Out+ to Gnd
same for Out- and then for both channels.
Measurements taken without power and/or speakers connected, just the bare board.
A bad (shorted) input cap also causes this symptom. Bad bootstrap cap can also cause symptom. Basically the board is going into protect mode. Or the speaker presents a short. Try a different speaker? Off that both channels have same problem.
TPA3118D2
So if there's no short on the output, you'll next measure bootstrap voltage on the bootstrap capacitor pins. It's usually around 6.23Vdc and should measure nearly equal.
If that's okay as well, there's the possibility of broken inputs caps, like xrk971 mentioned or a break in SDZs connection.
So if there's no short on the output, you'll next measure bootstrap voltage on the bootstrap capacitor pins. It's usually around 6.23Vdc and should measure nearly equal.
If that's okay as well, there's the possibility of broken inputs caps, like xrk971 mentioned or a break in SDZs connection.
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What's one, what's 6.36? Ohms?
Beside the measurements, does the error exists with different speakers, source (player), Power supply?
Beside the measurements, does the error exists with different speakers, source (player), Power supply?
I have the meter set at 20k in the ohms section. The leads with 6.46 is from input ground to both outputs, negative and positive.
TPA3118D2
Nah, use the lowest in possible section.
Input GND = Power GND.
Edit: What's between the outputs?
Nah, use the lowest in possible section.
Input GND = Power GND.
Edit: What's between the outputs?
Tried diff driver, same thing, sucks it right in. Also tried two different input wires and devices, same. Between the outputs? If you mean speaker it's an overnight sensation two way, or an 8 ohm 4 inch driver, new. Try grounding the inputs? What and how for that? Thanks you very much for all this!