Topping DX5II teardown

[Mutex]

You mentioned a 'PC': which OS is it running? (Windows, Mac, Linux...).

If the PC is running Windows, the issue might stem from one of their 'flawed' updates—something that happens frequently...

You might want to try your DAC with a Mac or, better yet, a Linux-based PC to rule out that possibility.

Beyond that, I don't have any other suggestions to offer.

Furthermore, given Topping's obvious expertise—especially since they created the device itself—I doubt they made a poor decision regarding the unit.

Troubleshooting a device of 'this caliber' would cost more than buying a new one, considering the hourly rate of an experienced, qualified electronics technician—and, as I mentioned, doing so without any schematics, relying solely on the user manual.

I run Linux, so Windows issues are eliminated.

I bought the DX5 II from Shenzenaudio over Amazon. Here in Germany they have to comply with certain warranty regulations. By law they would have to at least offer a repair, but would also have to cover the shipping themselves. Because they operate from China, they said the shipping costs would be too high, so they took the decision to just refund and leave me with the brick. Topping themselves weren't directly involved.

 

[ICIETDIYEUR]

That is what I wrote earlier: Topping made the right decision, and it is a very positive move on their part—commercially speaking—towards the customers they trust; that’s all there is to it.

 

[338h10]

@kevin gilmore has the circuit diagram posted here. Here's the full pcb board.


View attachment 467197

Can the 15V 2A power supply (AD30-B15) provide ample cushion when the DAC and headphone amp are running at full capacity? I have not done the calc, but it feels borderline.

 

[Mutex]

@ICIETDIYEUR, this is a zener diode, correct?

Measuring it the normal direction, I get 0.712V, but measuring it the opposite direction, I get around 1.001V. Is this a faulty one?

There is another one like this on the board that measures 0.788V in the normal direction and 0L in the opposite direction, which is what I would expect from a zener diode.

 

[Darth_Modred]

my topping dx5 II died, after i opened it i saw dead power source - ATAZ AD30-B15, where can i buy it or compatible power source that i can use instead?

 

[Wickers]

my topping dx5 II died, after i opened it i saw dead power source - ATAZ AD30-B15, where can i buy it or compatible power source that i can use instead?

It seems that these are similar.
Mean Well IRM 30-15
Mornsun LD30-23B15R2
LZTEC IRM-30-15