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Cayin N5ii Technical Support thread

Discussion in 'Portable Source Gear' started by seanwee, Mar 28, 2018.
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  1. lelutas
    I have done that. I tried 3.1 and 3.6 Still reboots into recovery mode only.
  2. lelutas
    I have done that. I tried 3.1 and 3.6 Still reboots into recovery mode only.
  3. Mayth
    Hi, It's been a while since my last post for my N5ii.

    Since last week, I'm not able to use the Play/Pause, Next/Last track buttons on Spotify. I have to power up the screen and then use them but it's not really convenient...
    I'm on the 3.6en.

    Thanks !
    Last edited: May 1, 2019
  4. saberslasher
    Hi. I have the N5iis with firmware 3.6. Unit was working fine for about 2 months and now when playing directly from the the CF cards, music would play and suddenly pause after about 10-20 seconds of playing. It works fine playing with Spotify. Does anyone know if there's a fix to this? Also began to notice a blueish streak that goes vertical on the screen. Can this be fix as well? Very frustrated with this product. Thanks.
  5. Mayth
  6. Matteomar95
    Hi @CayinSupport, recently my N5ii started to warm really hot during the charging process, and this one takes really long time to reach 100% (I measured it with a current usb tester, and appears that in 4hours it reach 100%, but the tester measured 6,5Ah (instead the usually 3Ah))
    So I open it, to identify wich component was the guilty, and i find out that the IC "EW=3C H1N" was the culprit (i attach a photo of such IC)
    My question is: on internet i couldn't find anything about it, so could you (maybe some enginner) tell me what is this IC and where can i find it for replacement.
    Thanks you, Matteo

    Last edited: May 29, 2019
  7. seanwee
    This is the exact reason why I had to send back my N5ii for RMA twice.

    The charging IC will fry if you use quick charge adapters according to Cayin because the adapter won't switch to normal charging voltage and instead use higher voltages which will kill the charging IC.
    Matteomar95 likes this.
  8. Matteomar95
    wow this is gross
    I just used the same charger of my galaxy s8 (that have quick charge) to charge it (the N5ii). Grrr

    I'm from Italy, how can I contact the RMA? Do you think that they're covering european users?
  9. Andykong
    You can either contact the shop where you bought N5ii, or email service@cayin.cn for warranty/repair service if the shop is not a Cayin dealer anymore.

    The IC in your photo is a step-up voltage regulator, it should warm up during charging, and the figures you mentioned are within acceptable range. We cannot conclude that the problem lies on this chip based on your observation. The chip probably is not available in Europe market. If you are certain that this ship is causing the problem and if you are skillful enough to replace the chip yourself, we can mail you the component so that you replace it yourself. However we are not responsible for any damage or malfunction after the DIY repair, that's common policy in consumer electronic industry.

    On the other hand, can you tell us more detail about your problem? It can't charge up to 100, so where did it stop? 80%? 90%? 98%? How long does it take to charge up your DAP from , say around 10% to around 90%? What about the duration of usage per charging cycle? Drop significantly as well? if you haven't done so, try to calibrate the battery gauge as we have suggested here. This will improve the battery efficient after extended swallow charge.

    My last advice is, don't discharge your Lithium battery too low (below 10%), or charge it up too high (beyond 90%). When you charge your battery upto 85%, you'll enter Stage 2 of Li battery charging known as Saturation Charge. The power management will lower the charging current significantly after that, to protect the battery from over-charge, and eventually will change from continuous charging to pulse charging when approach the end of charging cycle (typically around 95%)

    (cf: techrepublic.com)

    (cf: batteryuniversity.com)
    Cayin Stay updated on Cayin at their sponsor page on Head-Fi.
    Matteomar95 likes this.
  10. Andykong
    Unfortunately, this is an incomplete and misleading message. As per to our previous discussion, not ALL QC charger will cause the same problem. I shall quote my message again to clarify the situation..

    In addition, according to our record, you have toasted the XC8108 chip twice, an IC that will limit the current during charging. This is not the same IC as @Matteomar95 has raised in his post. I hope Matteomar95 will not be over-stressed because of your comment, because I do worry that the Li battery of his N5ii have been over-stressed if he make it a habit to charge the battery upto 100% all the time. :stuck_out_tongue_winking_eye:
    Cayin Stay updated on Cayin at their sponsor page on Head-Fi.
    seanwee likes this.
  11. seanwee
    Thanks for the clarification. And sorry for the misinformation.

    Which chip is the XC8108 by the way?
  12. Matteomar95

    Hello, thanks for the reply!
    The IC warm really hot, so much that I can't hold my fingertip on it. The battery charge time from 0% to 100% takes about 4 to 5 hours, and the DAP gets really hot. Then, if i leave it powered off, it will discharge. Also during usage, the battery drains really quickly.
    I'm able to change that component, so if you can send me an email with some datasheet for the "EW=3C H1N" and the equivalent IC (if any) I really appreciate. Or maybe we can talk about a possible shipping of this IC, I don't know.
    I take this opportunity to ask you where I can find a good replacement for the battery, I've searched on aliexpress for some lipo package of the same dimensions (to then weld the original battery connectors), but with no lucky.
    My mail is matteomar04@gmail.com

    Thanks you, Matteo
  13. text
    Thanks, this is very helpful. Now if I could get Android Auto to work between my N5ii and Honda head unit. I have no idea on which end the problem lies (other than there's no aux jack). :)
  14. Andykong
    So it does charge up to 100%, but take too long when compare to previous experience. How about charge it to 85%? Still take longer then expected? or the delay only occured between 90% to 100%, I have asked similar question previously because we need to understand whether the charging problem is related to Stage 1 (Constant current charge) or Stage 2 (Saturation Charge).


    The battery is a custom make item, you won't find this battery on Internet.

    Theoretically we can sell the battery to our users and let them replace it locally, it is fairly straightforward and is easier then replacing a chip on the motherboard. In reality, no fright carrier will accept an unattended/uninstalled Lithium batter in their cargo. I believe frequent travellers will aware that all flight companies has changed their practise and required their passengers MUST hand-carry their Lithium batteries. So unless you live fairly close to our factory and ground transportation is feasible, we can't deliver the battery to you.

    If you have decided to replace the chip at your own risk, please drop an email to service@cayin.cn and quote the message on headFi forum, they'll follow up your request through our proper channel.
    Cayin Stay updated on Cayin at their sponsor page on Head-Fi.
  15. Matteomar95
    The battery still take longer then expected in any percentage of charge, the DAP also got really hot, and after a complete charge, it drains battery to 0% during the day, even it's off. Thanks for the reply, I'll proceed to send an email to the Cayin service.
    Last edited: Jun 9, 2019
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