Build thread - building the Subbu DAC V3 SE - Page 87 - diyAudio
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Old 21st March 2014, 06:55 AM   #861
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Just think of things again not working out well. I would take Bobs offer !
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Old 21st March 2014, 11:32 AM   #862
Bikeman is offline Bikeman  Australia
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Well if it doesn't work, it's only $8 and a few days and I can come crawling back then.
I like to give things a go myself. This is the simple stuff! Anyway, it works, I just need to install a fan..
You're welcome to say "I told you so" later haha!

Thanks JP

Mark
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Old 21st March 2014, 11:59 AM   #863
bcmbob is offline bcmbob  United States
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FIY - A 6 oz. (trani = 3.2 oz.) package to Australia via first class mail calculates to ~ $12 on the USPS web site. Just a reference for future consideration.
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Old 21st March 2014, 01:46 PM   #864
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Finally after the first failure my 2nd attempt at the build paid off and I got the taste of sweet music to my ears. And sweet it is.

A big thank you to Subbu and JP for initiating this build. A big thanks also to all those who built and shared their experience and made this happen.

Initial impressions:

- Wide Sound Stage
- Good detailing
- Clean, Deep and Tight base (something that was lacking in my old setup)
- Dead Center Vocals.

Definitely a big improvement over my old setup. Things will improve after burning in for sure. And yes this DAC is addictive

PS: Pic is not the greatest. Didn't get time to click a fancy picture. SMD Soldering is not the best but a big improvement since my first build. I have yet to clean the board but that can wait for now
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Old 21st March 2014, 02:25 PM   #865
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Better ! Still buy the right SEPC caps (that fit on the board) and push them to the PCB and solder them. Lead wires should be short. Now they are way too long. The DAC will perform even better if you do.

Clean the board with cotton tabs and isopropyl alcohol 99%
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Last edited by jean-paul; 21st March 2014 at 02:27 PM.
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Old 21st March 2014, 02:41 PM   #866
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JP,

Yes I plan to change to the Panasonic Specs. This is not my final build but something for testing. Cleaning and trimming yet to be done.

All caps will be pushed to the board. Upgrading C35 also in the pipeline. All wires will be changed to better quality and shorter length.

Currently using RCA not BNC for testing so I need to figure that out too.

Im keenly following the V3 modification thread so can order the upgrade parts together. But I guess upgrades depend on personal preferences and also other devices in the chain.

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Old 21st March 2014, 03:36 PM   #867
Eldam is offline Eldam  France
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Take one good lamb (the Subbu V3 Dac) and many varieties of curry...

You have not a good food if the main is bad (the lamb) but some good mix with curry can definitly improve the meal and give it all its own character... eat the curry alone you have nothing. I will say about the flavor picture a better image will be: more and less spicy. But a good curry is a good curry... hard spicy or not hard spicy!

Try definitly the SEPC & Garry mods and if you can don't forgett to try C18 with the F cap (not the FP : see the amelioration thread).

Bismillah Khan is softer & fleshier in its solo dynamic attacks... with C35 F 2n5 of genuine BOM. But I don't know with your actual "blue" (not tested myself) cap which is maid for high frequencies... too many sorts of caps at Panasonics... like curry in India .

Last edited by Eldam; 21st March 2014 at 03:38 PM.
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Old 21st March 2014, 04:02 PM   #868
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Eldam... well put.
My primary goal was to get the dac up and running. Now time to chase after upgrades and mods.

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Old 21st March 2014, 04:09 PM   #869
Eldam is offline Eldam  France
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Don't forgett as we say at Manali in Himachall Pradesh : this is the dark side of the moon...

Happy for you that yours DACS are fixed.
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Old 24th March 2014, 01:14 PM   #870
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Quote:
Originally Posted by darshanjoshi View Post
I have lifted the C22 Caps but no output as yet. Hence C22 seems okay.

I have taken some readings at U1 and U2. All readings are taken at 20V DC on DMM.

L1, L2, L3, L4, L5, L6 showings correct Volts.
Also Capacitors before and after U regs are also showing correct Volts.

I can also assure that I did not burn U1 & U2 since I completed them very fast and effortless.

U1 Inputs Values at Position 4 and Position 20 looks off. Could RN1 be problem here? Position 6 at RN1 looks off as compared to other build readings which is Input in Position in 4 of U1.

Can someone please suggest how can I resolve my problem.

Thanks for all your help and Input.
Quote:
Originally Posted by darshanjoshi View Post
Tried reflowing at C4 and Position 20 but still no luck. In fact also did reflow R2.

Any more suggestions.
Quote:
Originally Posted by korben69 View Post
Hi

From values posted in #833 I think you're in trouble with all RN1, U1, U2, R4/5/6...
I suggest you to use Flux & Desolder Braid to remove extra solder from those parts.
Don't heat them too long and before, train yourself in this view using old PC parts
You'll see that you need few solder and almost the same amount of Flux to obtain a nice brighfull sodler.

I'll try to post more informations tomorrow.

Regards

Phil
I finally got some music after reflowing U1 and U2.

However, I am still facing some difficulties. Sometimes it works and sometimes it doesnt. DAC was operational for 2 hrs then it stopped automatically. Inspite of reflowing U1 and U2, it did not came up. Next morning, when I started DAC, it works fine. Again in the evening it stopped working.

When the DAC is functional :
1. Pin 16 of ESS (ZD) shows 3.57V
2. Pin 1 of ESS shows 1.54V
3. Pin 2 of ESS shows 1.66V

When the DAC is non-functional :
1. Pin 16 of ESS (ZD) shows 0V
2. Pin 1 of ESS shows 3.27V
3. Pin 2 of ESS shows 3.28V

Any pointers where am I going wrong.

Thanks for the Inputs.
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