Hi,
I have a DAC that has 8x TDA1543, the receiver is a CS8414. Audible clicks & pop noise have recently developed. If I play a test tone, the noises occur at intervals such as once every 2 seconds.
Does anyone have advice on where to begin troubleshooting this? I am running it off of a 12V battery
edit: i am pretty sure the noise is in both channels.
I have a DAC that has 8x TDA1543, the receiver is a CS8414. Audible clicks & pop noise have recently developed. If I play a test tone, the noises occur at intervals such as once every 2 seconds.
Does anyone have advice on where to begin troubleshooting this? I am running it off of a 12V battery
edit: i am pretty sure the noise is in both channels.
It's common for folks to run these DACs at higher than 5 volts. I run mine at 8 Volts, and it works fine.
50 to 60 Celsius sounds too hot though. Are there any heatsinks? Mine don't run nearly that hot.
They do have a reputation for distortion when they overheat. I haven't experienced it myself, but read it in a thread somewhere.
50 to 60 Celsius sounds too hot though. Are there any heatsinks? Mine don't run nearly that hot.
They do have a reputation for distortion when they overheat. I haven't experienced it myself, but read it in a thread somewhere.
are you measuring with a temperature probe? i'm getting 50-53C, so 60C in the case is a close estimate.
i also tried changing one of the values of the shunt regulator resistors so the chips would run on 6V. when i did this and played a 1khz tone, it sounded higher frequency, some kind of distortion. can i not simply just lower the voltage?
i also tried changing one of the values of the shunt regulator resistors so the chips would run on 6V. when i did this and played a 1khz tone, it sounded higher frequency, some kind of distortion. can i not simply just lower the voltage?
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fluckscapacitor said:
Yes, VR1 1kohms.
I have the same Dac (only 4 chips), and it was generating some pop corn noise, not periodic. I turned the screw of the ref trimmer, and, no more noise. I think that the track of the trimmer is not very good. It could be better to replace this pot with an equivalent discrete resitance.
Try to just turn a little the trimmer, and ear at the same time.
Philippe
fluckscapacitor said:
Other than the less than ideal way the 'ACT161's are connected, there is nothing wrong with the digital side of this dac. Clicks and pops are always going to be a possibilty, it is inherent in the design. There is the clock domain derived from the SPDIF datastream and the one created by the use of a local oscillator and when the difference between the two domains is great enough, there will be clicks and pops.
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