Hi Sangeet2,
Scope should check for signal,check for input,clocks,then data out of cs8414,LRCK BCK DATA SCK,if these are present on ak4393,look on the audio output pins 20-23, if nothing is on them then the problems is audio out,If you can put some signal on those pins you should have some output,maybe a hum but something,Might pulse the mute pin,just to make sure it's not muted,If all this checks out I would say the dac chip is dead,and need to replace it ,I would buy a new dac board off the bay,http://www.ebay.com/sch/i.html?_fro...0&_nkw=CS8414+ak4393+and+ne+5532+dac&_sacat=0
The last time I bought a dac chip it was 20 $ The new board is just a few more $,
I hope I have helped I don't know what else to tell you to do at this point unless it's to change that chip,I put the board verticl and heat the chip with a butane torch and the chip will fall off when it gets hot,or cut all the pins and remove them one at a time,
Good luck to you !
NS
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Hi all,
After trying for several months to get my DAC working, I finally decided to ask for help.
A while ago I bought the well known CS8416 + AK4396 + NE5532 2496 DAC Kit 24BIT 192K from Ebay. After soldering all parts it did not work. That is, there is a crackling sound from the speakers. I've tried several spdif cources (squeezebox, cd player, another squeezebox) but all with the same result. I also checked all DC voltages, they are fine.
After a while I figured I must have had bad luck (defective IC?) and decided to simply buy another one. To my big surprise, the second one (bought from another reseller) has the exact same issue.
In the mean time I had sent the first one back to china to have it checked, it was found OK by the manufacturer and returned to me after 2 months. However still not working..
All leds are lit, the audio LED is flickering. I tried different sample rates, all with the same result: some crackling from the speakers.
Any idea what might be wrong and how I can go on troubleshooting? I do have a scope. I find it very strange that both DACs have the exact same issue and I am hoping it might be something very simple I am overlooking.
Please forgive me for not reading al 279 pages first ;-)
Best regards,
Ronald
After trying for several months to get my DAC working, I finally decided to ask for help.
A while ago I bought the well known CS8416 + AK4396 + NE5532 2496 DAC Kit 24BIT 192K from Ebay. After soldering all parts it did not work. That is, there is a crackling sound from the speakers. I've tried several spdif cources (squeezebox, cd player, another squeezebox) but all with the same result. I also checked all DC voltages, they are fine.
After a while I figured I must have had bad luck (defective IC?) and decided to simply buy another one. To my big surprise, the second one (bought from another reseller) has the exact same issue.
In the mean time I had sent the first one back to china to have it checked, it was found OK by the manufacturer and returned to me after 2 months. However still not working..
All leds are lit, the audio LED is flickering. I tried different sample rates, all with the same result: some crackling from the speakers.
Any idea what might be wrong and how I can go on troubleshooting? I do have a scope. I find it very strange that both DACs have the exact same issue and I am hoping it might be something very simple I am overlooking.
Please forgive me for not reading al 279 pages first ;-)
Best regards,
Ronald
You need to check the datasheet (or schematic) and check the signals present on the i2s data lines from the digital receiver whilst a source is playing. ( using your scope)
If all data is as expected then check analog signals from the output pins of the ak4396.
There are only a few possible faults. 1) receiver chip. 2) dac chip. 3) op amps. 4) bad solder joint somewhere.
What you need to do is what technicians call tracing the circuit. Meaning go through things in a logical manner. Check for correct voltages on the pins of each chip. Then check data signals. If you do this you will find and fix the fault.
Also check the incoming spdif signal on the pin of the receiver chip.
Are you using a normal coaxial 75 ohm spdif cable?
I only ask because the seller said it was working.
Weird home brew spdif cables often don't work because the impedance is wrong and have severe reflections which means the data doesn't get through...
If all data is as expected then check analog signals from the output pins of the ak4396.
There are only a few possible faults. 1) receiver chip. 2) dac chip. 3) op amps. 4) bad solder joint somewhere.
What you need to do is what technicians call tracing the circuit. Meaning go through things in a logical manner. Check for correct voltages on the pins of each chip. Then check data signals. If you do this you will find and fix the fault.
Also check the incoming spdif signal on the pin of the receiver chip.
Are you using a normal coaxial 75 ohm spdif cable?
I only ask because the seller said it was working.
Weird home brew spdif cables often don't work because the impedance is wrong and have severe reflections which means the data doesn't get through...
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Thanks Erin,
Yes I do use coaxial 75 ohm spdif cable, swapped it with another one as well, both work on other dac's.
Ruled out the opamps already, using a sinus 44,1 kHz 16 bits as input, no sinus at opamp input pins.
Spdif looks normal on scope. Checked already for bad solder joints as well.
Main issue for me is that pins of dac chip and spdif receiver are too small to measure on without short circuiting.
I'll give it a try and otherwise I will throw them away and buy a new ready assembled one..
Ronald
Yes I do use coaxial 75 ohm spdif cable, swapped it with another one as well, both work on other dac's.
Ruled out the opamps already, using a sinus 44,1 kHz 16 bits as input, no sinus at opamp input pins.
Spdif looks normal on scope. Checked already for bad solder joints as well.
Main issue for me is that pins of dac chip and spdif receiver are too small to measure on without short circuiting.
I'll give it a try and otherwise I will throw them away and buy a new ready assembled one..
Ronald
hi tingtong5,
Find a cap or resistor on the track that a pin is on ,measure there.
Remember 4 things Power- Gnd- input(signal data,ect)- output(signal data,ect)
NS
Find a cap or resistor on the track that a pin is on ,measure there.
Remember 4 things Power- Gnd- input(signal data,ect)- output(signal data,ect)
NS
Thanks nosmoking!
I used a magnifier and I was suprised how well I was able to measure after all.
However, then I found out the tweeter of one of my speakers died, so now I have some other prioriteit.. :-(
To be continued!
Have a nice day!
I used a magnifier and I was suprised how well I was able to measure after all.
However, then I found out the tweeter of one of my speakers died, so now I have some other prioriteit.. :-(
To be continued!
Have a nice day!
Speaker has been repaired 🙂
Today I measured the DAC while playing 1 kHz sinus (16 bit 44.1 kHz):
CS8416
pin 24 MCLK : 24 MHz clock present
pin 26 SDOUT: data present
pin 27 OSCLK: 6 MHz clock present
pin 28 OLRCK: 21 kHz clock present , is this frequency (0.5 fs) correct?
AK4396:
pin 3 MCLK: 24 MHz clock present
pin 5 BICK: 6 MHz clock present
pin 6 SDATA: data present
pin 7: LRCK: 95 kHz clock present, is this normal??? Its 4-5 times higher then LRCK on CS8416
Then the really weird thing:
AK4396 pin 20,21,22,23 1 kHz sinus present!! However not all the time, when taking samples, sometimes I see a sinus, sometimes part of a sinus with either some rubbish or DC before or after it.
Any ideas what might be wrong?
Today I measured the DAC while playing 1 kHz sinus (16 bit 44.1 kHz):
CS8416
pin 24 MCLK : 24 MHz clock present
pin 26 SDOUT: data present
pin 27 OSCLK: 6 MHz clock present
pin 28 OLRCK: 21 kHz clock present , is this frequency (0.5 fs) correct?
AK4396:
pin 3 MCLK: 24 MHz clock present
pin 5 BICK: 6 MHz clock present
pin 6 SDATA: data present
pin 7: LRCK: 95 kHz clock present, is this normal??? Its 4-5 times higher then LRCK on CS8416
Then the really weird thing:
AK4396 pin 20,21,22,23 1 kHz sinus present!! However not all the time, when taking samples, sometimes I see a sinus, sometimes part of a sinus with either some rubbish or DC before or after it.
Any ideas what might be wrong?
The 95 kHz on pin 7 of of AK4396 must be 96 kHz of course. Also I remeasured pin 28 of 8416, its 96 kHz as well.
I forgot that my media player I am using is upsampling the red book files to 24 bits 96 kHz , so the measured 96 kHz is normal.
So, there is a analog sinus of 1kHz at the analog outputs of the AK4396, just not all the time..
I like to mention again that I have 2 of these dac's , they both behave exactly the same.
I forgot that my media player I am using is upsampling the red book files to 24 bits 96 kHz , so the measured 96 kHz is normal.
So, there is a analog sinus of 1kHz at the analog outputs of the AK4396, just not all the time..
I like to mention again that I have 2 of these dac's , they both behave exactly the same.
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Therefore I had a look (should have started there 😛 ) at incoming spdif signal, it looks very bad. When disconnecting from DAC it looks neat and fine. So I will focus on this first now.
Both DACs are working fine now 🙂
After using a different RCA contra connector spdig signal looks fine and DAC is working. All these months the defective part was the RCA connector, the only thing I never swapped... 😱
After using a different RCA contra connector spdig signal looks fine and DAC is working. All these months the defective part was the RCA connector, the only thing I never swapped... 😱
OPA1642 sounds good when connected to a tube amp
This post is old, but I figured I should post my findings.
The OPA1642 sounds very good when it’s connected to a tube integrated amplifier. Considering that the input impedance is typically much higher in a tube amp input, and does not drain a lot of current out of the OPA1642, with its limited current resources, it makes sense; at least it does for me.
Am I totally of track here?
With kind regards
Martin
This post is old, but I figured I should post my findings.
The OPA1642 sounds very good when it’s connected to a tube integrated amplifier. Considering that the input impedance is typically much higher in a tube amp input, and does not drain a lot of current out of the OPA1642, with its limited current resources, it makes sense; at least it does for me.
Am I totally of track here?
With kind regards
Martin
Hi guys, need some help. My DAC stopped functioning well after I went overseas for 10 days, it was working well before and no one used it in between. I checked all power supply to SMD chips and they are all fine (3.3V), SPDIF connector from pc, cables are fine too, where else can I look into to troubleshoot? Thanks.
Thanks for your hlp NS,
I have a new board now and still have difficulties. But I assume that my optical to coax adapter might be the reason.
I ordered a different board which seems to provide optical input. Also the shop
wrote to me that it does. Now the boards arrived and I am not sure if that is correct. So far they also were not able to send a schematic...
PCB SMD IC New Hi End DAC 24 Bit 192K Hz CS4398 SC | eBay
Attachments
Hi Sangeet2,
Could I recomend you get a stand alone cd player, I use a old one ,all most all of them have spdif and optical out,I would use that to check the inputs,I have some of those dac boards you have and will try to get time to set it up and see if can check some points for you,
The led flickering is not right ,they should be lit for audio lock.
Keep at it ,You can do it,it just takes time,sooner of course is better but Thomas Edison has said he had 999 failures before a Aha success moment ! I don't know if I would have his patience,LOL.
NS
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Hey guys,
I am planning to buy a DAC DIY kit. Since I am a student and buget is very low, I was looking at this one:
New DIY DAC Kit CS8416 AK4396 NE5532 2496 DAC Kit 24bit 192K | eBay
(NEW DIY dac kit CS8416 + AK4396 + NE5532 2496 DAC Kit 24BIT 192K)
Is this a good choise or you would recommend any other one?
I will be using it with O2, and Startving Student from fredfred_2004
Best regards,
Ziggy
I am planning to buy a DAC DIY kit. Since I am a student and buget is very low, I was looking at this one:
New DIY DAC Kit CS8416 AK4396 NE5532 2496 DAC Kit 24bit 192K | eBay
(NEW DIY dac kit CS8416 + AK4396 + NE5532 2496 DAC Kit 24BIT 192K)
Is this a good choise or you would recommend any other one?
I will be using it with O2, and Startving Student from fredfred_2004
Best regards,
Ziggy
I am going to order this one:
New DIY DAC Kit CS8416 AK4396 NE5532 2496 DAC Kit 24bit 192K | eBay
Looking forward to recive my new DAC 🙂
New DIY DAC Kit CS8416 AK4396 NE5532 2496 DAC Kit 24bit 192K | eBay
Looking forward to recive my new DAC 🙂
