Can you try it from a different source also? Like some other CD player?
Thanks
Balaji
Thanks
Balaji
Please clarify - does the system stop on it's own requiring a restart, or are you saying the problem appears when you intentionally cycle the AC power?
Just some guesses:
Have you tried the V3 with another source?
Do you have another DAC to determine if the problem is in the CDP? (heat related)
Can you check the temperatures on both the PS and the DAC? It almost sounds like a cool-down is required.
Did you try gently tapping all the components including those on the PS to see if something is loose or has a cold solder joint.
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Pin 16 goes high when there is no data for 8192 clock cycles, this problem happening when you switch off then back on sounds like the chips are resetting slightly differently, possibly due to a glitch caused by the rapid on and off, the ESS coming on line a mS or 2 before the Wolstien, this causing Zd to go high. This can be a problem sometimes with circuitry, quite often solved by the addition of a reset supervisor. Though in this case you seem to be the only one with the problem. Try turning off and on with a varying delay before turning on. Record the times roughly and I believe you will find that leaving a few seconds may solve this problem.
Capacitors etc will hold the supplies up for a time so the devices having there own supplies will reset slightly differently.
Please report back your findings.
MarcI have also tried from another BDP but same results. I also have a HTPC with SPDIF Out. Will try with same.
System doesnt go off automatically. Only when I switched it off and switch on immediately (intentionally), it goes off. Its like one cycle use irrespective I use the system for 10 mins or 5 hrs. Even when I played for 5 hrs, it was Non-stop without any breakdown nor any heat from any parts whatsoever. Even the transformer after 5 hrs was very cool.
I have also tried from another BDP but same results. I also have a HTPC with SPDIF Out. Will try with same.
I am been using Marantz Inbuilt DAC for 2 years with same source and it works flawless. 10-12 hrs continuously without problems. Scarcely source should be problem here.
I tried tapping components like WM, ESS and XO but no luck. Will try tapping each component next time when problem arise.
Pin 16 goes high when there is no data for 8192 clock cycles, this problem happening when you switch off then back on sounds like the chips are resetting slightly differently, possibly due to a glitch caused by the rapid on and off, the ESS coming on line a mS or 2 before the Wolstien, this causing Zd to go high. This can be a problem sometimes with circuitry, quite often solved by the addition of a reset supervisor. Though in this case you seem to be the only one with the problem. Try turning off and on with a varying delay before turning on. Record the times roughly and I believe you will find that leaving a few seconds may solve this problem.
Capacitors etc will hold the supplies up for a time so the devices having there own supplies will reset slightly differently.
Please report back your findings.
Sorry for a Noob Question. What is 8192 Clock Cyles?
Does value going on Pin16 high is good or bad? I have found that if value is around 3.27, it works fine. When it is zero, DAC doesnt work.
Immediate intervals are problems here. eg Immediate, 5 mins gap, 10 mins gap. Max I have tried is 10 mins. Generally when it doesn't restart I give up and start next day. Next day DAC is up in one short without issues.
I will try more intervals and post back my findings.
Thanks everyone for your valuable inputs.
One of the worse things you can do to some electronic units is turn them off then immediately back on (it is common practice to wait at least 10 seconds), unless the unit has been designed for such occurrences. Such designs that may experience such quick power outages are generally ones where vibration is involved, for basic equipment a large reservoir cap will suffice (potable devices etc). For life/mission critical they tend to have circuitry that guarantees the unit will start up properly in the event of a power outage, usually with a reset supervisory IC that will start power supplies up in the required order and hold chip resets until power supplies are stable, a bit of overkill for this and many other designs. The rule should be turn a unit off, count at least 10 seconds and turn the unit back on, devices that use very little current will not drain a cap in a quick on off operation.
Before you reflow everything try a slow on/off sequence as detailed above.
Before you reflow everything try a slow on/off sequence as detailed above.
When I say immediate, I usually do not start any electronics before 5 to 10 secs as a general practice.
I will check all the Values of all the parts when it is working and when not working to identity if there are any Voltages difference. Maybe that way I can identity which all parts are getting affected when the DAC is not operational.
I think most of the symptoms discussed point towards a problem with the WM8804, not the ES9023. The ZD pin, as Marc pointed out, is just a flag that says whether or not the ES9023 is getting data. When Darshan is having a problem then the flag flips polarity indicating that the WM8804 is not delivering data to the ES9023. So I'd take a close look at the resistors that initialize the WM8804. That means the resistor network RN1 and the R1, C1. I would resolder these connections and then clean up any extra solder with solder wick. If there is still trouble, please post the WM8804 voltages when there is a problem.
---Gary
---Gary
darshanjoshi?
did you notice a variation of brightness from the diode on the Powersupply PCB ?
Is it possible than the 1000 uF cap are not big enough as reservoir for fluctuation of electricity quality comming from wall ? These days did you notice problems with electricity in your neighbourhood ? Lake of power during long moment is sometimes possible in your country in some place (with all due of respect)?
Are the main caps of W8804 really > 4.7 uF (10 uf in the BOM)
It is just a question, I don't know if such a thing can happen with a DAC (and it's not smps anyway....)
did you notice a variation of brightness from the diode on the Powersupply PCB ?
Is it possible than the 1000 uF cap are not big enough as reservoir for fluctuation of electricity quality comming from wall ? These days did you notice problems with electricity in your neighbourhood ? Lake of power during long moment is sometimes possible in your country in some place (with all due of respect)?
Are the main caps of W8804 really > 4.7 uF (10 uf in the BOM)
It is just a question, I don't know if such a thing can happen with a DAC (and it's not smps anyway....)
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I again checked yesterday. DAC started immediately.
Then I switched off and switched on after 1 min. No Luck.
Then I switched off and switched on after 5 min. No Luck.
Then I switched off and switched on after 20 min. Got Lucky.
I have already resoldered RN1 once some time back. Will try re-soldering R1 & C1.
Readings when DAC not working :
RN1
1 3.280 3.290 8
2 0.000 3.290 7
3 3.280 0.039 6
4 0.000 3.280 5
R1
3.28 3.28
C1
0 3.28
WM
1 3.280 1.640 20
2 3.280 3.290 19
3 0.000 0.000 18
4 0.039 0.026 17
5 3.280 0.000 16
6 3.290 3.520 15
7 3.290 3.520 14
8 0.000 0.000 13
9 1.700 0.029 12
10 0.550 0.770 11
Sorry I do not know to see variation of brightness from the diode... I am a little noob here.
No electricity problems in my area nor my place for many years.
All caps for WM used as per GB arranged by Phil.
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Hello friends,
After following your tips,I was able to run my DAC for few hours and there after a strange issue is affecting it from working.I am not using powersupply from group buy,but another one which has transformer of 22-0-22 and max 24V (trimmed to 5V).It can output 1A max if there is demand.
Please not that I did not connect phono stage as in picture.Its a reference picture of power supply which I have.
Let me write in proper way.
When DAC worked I got following values-
Main input voltage 4.98V.
L1 value - 4.78V
L2 value - 4.92V
All voltage values before connecting L3,4,56 were close to ideal.
R4 0.04V
R5 1.32V
R6 1.66V
Q2 reading 3.28V, 2.04V, 0, 1.37V
The above values were taken when DAC was working fo 2 hrs.
After that I cleaned the PCB with IPA,connected again and tried to run,no luck.
From then I found my main input voltage dropped from 4.98 to 2.37V.
So I removed all L3,4,5,6 and checked again.Now main input voltage again came as 4.98V
Then I connected L3..6 one by one and checked values again.
After connecting L6, voltage reading 4.78V
After L5 ,dropped to 4.36V. then L4 which caused 4.02V and all connected ,reading was 3.35V and soon dropped to 2.35V around.
So I took readings connecting L3L4 and L5L6 separately.that is when L3L4 connected, L5 L6 were not soldered.
So I got following readings.
This time after L1 4.98V (not like 4.78V earlier) L2 4.98V
R4 0.04V
R5 1.53V
R6 1.67V
Q2 3.28, 2.14, 0, 1.47V
I also noticed that few parts in my power supply started producing heat(cant touch parts) within 5min of DAC turned on(no sound though).see the image-
Now what can be the cause of drop in Main input voltage from 4.98 to 2.35V?
Why my power supply parts are heating up?
Is it inductors are problem or the power supply?
Finally what can be the solution?DAC not running.
Please guide.
Thanks.
After following your tips,I was able to run my DAC for few hours and there after a strange issue is affecting it from working.I am not using powersupply from group buy,but another one which has transformer of 22-0-22 and max 24V (trimmed to 5V).It can output 1A max if there is demand.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Please not that I did not connect phono stage as in picture.Its a reference picture of power supply which I have.
Let me write in proper way.
When DAC worked I got following values-
Main input voltage 4.98V.
L1 value - 4.78V
L2 value - 4.92V
All voltage values before connecting L3,4,56 were close to ideal.
R4 0.04V
R5 1.32V
R6 1.66V
Q2 reading 3.28V, 2.04V, 0, 1.37V
The above values were taken when DAC was working fo 2 hrs.
After that I cleaned the PCB with IPA,connected again and tried to run,no luck.
From then I found my main input voltage dropped from 4.98 to 2.37V.
So I removed all L3,4,5,6 and checked again.Now main input voltage again came as 4.98V
Then I connected L3..6 one by one and checked values again.
After connecting L6, voltage reading 4.78V
After L5 ,dropped to 4.36V. then L4 which caused 4.02V and all connected ,reading was 3.35V and soon dropped to 2.35V around.
So I took readings connecting L3L4 and L5L6 separately.that is when L3L4 connected, L5 L6 were not soldered.
So I got following readings.
This time after L1 4.98V (not like 4.78V earlier) L2 4.98V
R4 0.04V
R5 1.53V
R6 1.67V
Q2 3.28, 2.14, 0, 1.47V
I also noticed that few parts in my power supply started producing heat(cant touch parts) within 5min of DAC turned on(no sound though).see the image-
An externally hosted image should be here but it was not working when we last tested it.
Now what can be the cause of drop in Main input voltage from 4.98 to 2.35V?
Why my power supply parts are heating up?
Is it inductors are problem or the power supply?
Finally what can be the solution?DAC not running.
Please guide.
Thanks.
There is no continuity/short path.I have checked it.If L3,4,5,6 are not soldered,I get 4.98V,later it drops once L connects L3..6.
@ darshanjoshi - Diode is the LED on the power supply. A couple more simple things to check: Turn off the DAC and disconnect the power supply. Check for a residual (stored) current on the PS (unplugged / switched off) and the DAC. A little bulb can be used to dissipate a charge if one exists. The pic shows one for larger power supplies but soldering some wires to a flashlight battery will work here. Just touch those wires to the power terminals on each board for a few seconds.
How to....
The 1, 5 and 20 sequence appears related to timing/sync as Gary and Marce describe, but clearing all the stored voltages might help pinpoint something.
How to....
The 1, 5 and 20 sequence appears related to timing/sync as Gary and Marce describe, but clearing all the stored voltages might help pinpoint something.
Attachments
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You can try to connect inductors to power only the wm8804 (L5,6) and after that to power only ES9023 (L1,2,3) so you can detect in wich part of dac you have that overconsumption.
My idea is to try to isolate the stage wich eating too much current.