Hi,
Facing new issue.My dac was not turning on.So checked voltage and l found power supply voltage dropped to 3.5 or less if dac is connected to it.Else 4.93v.
So changed to LM317 psu and with it 4.99 turned to 4.5v.When l touched L1,L2, it was almost hot.
Tried reflowing it but no luck.So what can be an issue?
Did L1, L2 changed values or anything else?
Facing new issue.My dac was not turning on.So checked voltage and l found power supply voltage dropped to 3.5 or less if dac is connected to it.Else 4.93v.
So changed to LM317 psu and with it 4.99 turned to 4.5v.When l touched L1,L2, it was almost hot.
Tried reflowing it but no luck.So what can be an issue?
Did L1, L2 changed values or anything else?
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Measure resistance from each Lto gnd before reg and after Mic regulator. If it is 0 ohm before reg then is damaged Mic reg if after then Wm receiver.
I set DMM to 20k ohm and checked all L to ground.At L4, before and after l got zero.So whats diagnosis?
Today removed all L 3,4,5,6 and checked all regulator readings and they are perfect.
Found continuty at C22 cap.Removed 9023 DAC chip and its lead 4 & 5 also showed continuty.
Look like 9023 chip is dead.
Found continuty at C22 cap.Removed 9023 DAC chip and its lead 4 & 5 also showed continuty.
Look like 9023 chip is dead.
I have one doubt, why no.4 pin is grounded on PCB? Its DIF pin and can keeping that leg un-soldered will run DAC?
Finally got ess9023 chip from ebay.l found new chip is made in Taiwan whereas old one dead was Chinese.
New one sounding nice and warm.
New one sounding nice and warm.
In need of schematics of the power supply
All,
I have lost my schematics of the power supply / BOM!
Can someone please help me out with those!
Thanks
Peter
All,
I have lost my schematics of the power supply / BOM!
Can someone please help me out with those!
Thanks
Peter
Here's a build I just completed for someone who bought one of my three sets of Subbu PCBs
All in all, a very fun build! Sounds really good too! 🙂
All the best!
Do
All in all, a very fun build! Sounds really good too! 🙂
All the best!
Do
Nice built. I have looked over my subbu dac for any upgrades or modifications to my initial built and have made sure that i fix the C7 orientation cap. for what it's worth is the C7 capacitor orientation in your built needing to be fixed or..... ? according to the picture in page 1 of this tread ?
rol
rol
Hey,
Resurrecting this old thread in the hopes of procuring a pcb for the power supply or even a complete set of boards. I have been unable to participate in my hobby for some years and am excited to be at it again. One of the projects I was working on is this DAC. I have two parts kits, one main pcb. I need the PS pcb and the DAC chips. I ordered the chips ( hope they are real) and am now on the hunt for the psu board.
Any help would be greatly appreciated. I would be happy to contract out the boards if I had the gerber files.
Thanks everyone, it’s great to be back and building again.
Resurrecting this old thread in the hopes of procuring a pcb for the power supply or even a complete set of boards. I have been unable to participate in my hobby for some years and am excited to be at it again. One of the projects I was working on is this DAC. I have two parts kits, one main pcb. I need the PS pcb and the DAC chips. I ordered the chips ( hope they are real) and am now on the hunt for the psu board.
Any help would be greatly appreciated. I would be happy to contract out the boards if I had the gerber files.
Thanks everyone, it’s great to be back and building again.
Hi,
I could sell a populated - and optimised from the building special thread by BCMBOB- set to you (so in working condition) but I have no idea of the price it should be today for the two populated boards shipped from EU ?
An idea anyone ? Anyway pm me if interrested cause I have two kits.
I could sell a populated - and optimised from the building special thread by BCMBOB- set to you (so in working condition) but I have no idea of the price it should be today for the two populated boards shipped from EU ?
An idea anyone ? Anyway pm me if interrested cause I have two kits.
OK thank you! I’m excited now!! I’ve had this kit for some time now, I can finally see well enough again to be able to build it! I even have some of those special boards around too. Buffers I think, been a while.
Now as my wish has come true, could I possibly reach for the stars here and inquire if there is another set of boards?? I do have to sets of parts!!
Thanks again, that is what is so great about this community!!
I recently had the DAC board a few months back. Built it for a friend and the project called for a larger PSU... hence the extra PSU board.
The JG buffer is definitely a bonus (or I'd even say required at least in my case) with the ES9023 type DACs.
Glad I could be of help.
The JG buffer is definitely a bonus (or I'd even say required at least in my case) with the ES9023 type DACs.
Glad I could be of help.
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