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The Zishan dsd's corner

Discussion in 'Portable Source Gear' started by neog007, Nov 17, 2016.
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  1. Merlin-PT
    The chip that regulates charging in zishan is TP4056, it does 5V 1A max. It's near the microusb connector.
    In zishan it charges at 0.9A or 1A max when the battery is empty.
    It will charge at that max current until the battery gets up to some pre-determinated charge %, then it starts lowering the current until full charge.

    The charging current (is proportional to the charging speed and) can be limited by a bad chip, an almost full battery, a microusb cable with small section power wires, a charger that does less than 1A or a standard computer USB2 port that can only do 0.5A.

    Measured in last photo here:
    Last edited: Mar 9, 2019
    HeyManslowdown97 and Ivan TT like this.
  2. HeyManslowdown97
    Yea but I want to change it with a replacement like a fuctional stock op amp and Capacitors Or LDOs that everyone on this thread has done and you and Ivan keep showing me specs and why you are right. (I don’t care). When I go to the car parts store and I need a part and they don’t give me explanations why it works, they just give me one that just work! If you don’t know or can’t be bother with “silly request” just ignore it not give me a citation about the rules!

    The big payoff: Maybe I get a better sound and can live with the battery problem?

    Maybe my upgrade will rock and I can share with the group! I just want to change it. So it will be more beneficial as feedback to give a cross reference with part that would work instead of its stock rather then lectures on rules.

    I know it’s not Zishan Porn with wires with electrical reconfiguration owners manual jargon but it still a mod, no?

    I’d also like to change the 3.5 and 2.5 outputs with gold plated connectors inside to go with my headphones at are gold plated. I may not do anything to sound but I’m just give it a go since I’ll be changing the LDOs. What’s the big idea?!
    Last edited: Mar 9, 2019
  3. Merlin-PT
    Sorry friend but that doesn't make sense.
    That chip only charges the battery, then zishan gets it's power from the battery and we listen to it portable when it's not charging.
    I can't even understand what you are trying to say.

    Also when you reply to a post that is above your reply, you don't need to quote the full post. It will double the information. Just make a post, don't quote.
    Last edited: Mar 9, 2019
  4. Merlin-PT
    That chip doesn't affect sound, you can replace it if you like, but you need a hot air soldering station, because it has a dissipation heat pad bellow the chip that needs to be soldered to the PCB.
    Why you quoted my post?
    Last edited: Mar 9, 2019
  5. buzzbuzz
    I am unsubscribing this thread for now. Life is short.
    HeyManslowdown97 likes this.
  6. HeyManslowdown97
    I already have so I just come on to complete my mods and I’m off like a prom dress.

    I don’t emails unless they are address to me. I
    Just as a reference but again we are playing games by lawyering up on rules. It takes the spirit out of DIY community. We all come out this at different angles. You and Ivan seem to believe that you are the elders and it should not be tarnished with low brow members.
  7. Merlin-PT
    Sorry friend, I give up.
    If I won't reply to some of your future posts is because I can't understand them.
    Sorry about that.
    Last edited: Mar 9, 2019
  8. endia
    sorry but I really didn't mean that.. but please pay attention if someone unsubscribing, no fun either..
  9. calico88
    I wonder how good the audio note cap for zishan output ?
    Some people using it, please give me ahort review compare to nichicon find gold or others you have.
    DBaldock9 and Merlin-PT like this.
  10. Merlin-PT
    You are the one insulting me in this post, if you reread my posts, there are no insults in my replies.
    You shouldn't feel insulted if people correct or reply to what you ask or write.
    When people correct me, I feel that I've learned something new.

    I explained you why changing the battery charge chip doesn't affect sound.
    I also explained you what could affect battery charge speed.

    I changed my battery charging chip for an original, but only because it was damaged when the player arrived.
    There was a solder bridge from factory soldering in the microusb connector PCB pads that blew the chip when I first charged it with box still closed.

    The Chinese chip works well and has the same charging speed as the original, I tried both and measured the current and time.
    You are free to change that chip if you want to, but you should only expect benefits if your chip is damaged.
    As a side note, I'm not comfortable messing with the charging chip, I replaced it only because it didn't work, the battery stores a lot of energy and can be dangerous if overcharged, short circuited, etc, because of this I recommend not changing or messing with that part of the circuit.

    When we propose to do something it's normal other people have already done it.
    For example, I only have the player for 2 months, all the mods I'm doing, Ivan (and others) already have done them and I glad they did, he and others share value experience, telling what works best or not. This was one of the reasons I bought this player, so I could learn from others.

    Where you see insults in this?

    Forum rules and regulations are to be followed and necessary, they make life easier to everyone.
    Last edited: Mar 10, 2019
    nesty, DBaldock9 and Ivan TT like this.
  11. endia
    I'm one of them but no experience with other caps on zishan 4495 dsd.. tried nichicon fine gold, cerafine and silmics in other applications but zishan. so no direct comparison but please let me explain my "feeling" that much satisfied with audio notes and have no plan to try other caps.. yet..
    the only direct comparison can be with stock (fake?) elna re3s and no contest here. audio notes have much higher resolution and separation while being smooth and warmer.. hope this helps..
    Last edited: Mar 10, 2019
    Merlin-PT likes this.
  12. AxelCloris Administrator
    Again, please keep the discussion on-topic. This is a thread for the Zishan DSD. Let's make sure the conversation remains relevant to the player.
    nesty, Sgt.Peppers, Ivan TT and 5 others like this.
  13. Draknodd
    Made some mods to my zishan. Thanks to IvanTT for the good suggestions!


    LM4562 replaced with LT1364
    OP275 replaced with AD8620
    LDO's replaced, same for caps around the dip8 socket.
    22ohm resistors at the output replaced with 10Ohm.

    Soundstage is wider, separation of instruments if more noticeable. Of course those are details, it is not night and day but noticeable for sure.
    At the moment I think that I won't get any benefit from other upgrades until I'll buy a more resolving pair of iem (currently 1more quad driver).

    BTW this little mod is really cheap but the improvement is clearly audible. Recommended!
    Merlin-PT, DBaldock9 and Ivan TT like this.
  14. calico88
    would you tell me the difference using 10ohms ?
    DBaldock9 likes this.
  15. DBaldock9
    Reducing the output series resistance means that more of the amplifier voltage is across the load - but shorts that occur when plugging / unplugging earphones will draw more current from the amplifier, possibly damaging it.
    If you use an op-amp that has internal short circuit protection, you can reduce the output series resistors to 0Ω.
    HeyManslowdown97 likes this.
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