The package is very small and compact, and the built-in antenna has these advantages. the effect of XDR3250 looks very much like an ashtray, but the real thing doesn’t look very much like it, because it’s more like a fruit bowl.
Open the outer package.
The power output specification is 12V/2A, and a super category 5 cable is included. (The standby power of this wireless router is about 6.6W)
The interface on the back of the body has only three gigabit ports, which is a pity because the size could accommodate more of them.
With so many heat sink holes, there is no need to consider whether the heat dissipation is sufficient.
Height about 8CM.
The XDR3250’s lower edge length is a little shorter than the Xiaomi 10 phone:
Cell phones can be placed.
Will there be a wireless router with an integrated wireless charging function in the future?
Bottom of the fuselage.
No screws, directly from the bottom to move away: the
I can’t believe the antenna connector is detachable, detachable, detachable, and dual-band antenna, dual-band antenna, sky-band antenna 。。。。 This is a rare species of TP-LINK ah! In fact, the WDR7650 is also like this.
The motherboard does not use screw threads with the shell fixed, the following chart can also record the location of the antenna corresponding to the time of installation back can be inserted back according to.
Take off the four antennas and take out the motherboard, then you can see four PCB antennas, all dual-band antennas.
There is a ceramic heatsink near the mesh port, take it off, and it is indeed RTL8367S.
PCB antenna close-up.
There is a heatsink on the other side of the motherboard, but there is no chip on this side. This black heatsink is to help cool the chip on the other side of the motherboard, and there is nothing under it.
Taking down heat dissipation.
DC input port.
The heatsink on the other side of the motherboard is also taken off:
Continue to disassemble and remove the two metal shields.
There is a piece of heat-conductive silicone pad, it is estimated that the CPU, other chips are not.
First look at the CPU ah, the model is MT7622B, ARM® Cortex-A53 architecture, dual-core 1.35GHz, stronger than the MT7621A. However, only integrated with a 100-gigabit switch chip, so this program must be external gigabit switch chip to have a gigabit network port available.
Next to the CPU is a memory chip, the model is M15T2G16128A, capacity 256MB.
MT7622B integrated with 2.4G wireless chip, support 4x4mimo, 256-QAM, maximum rate 800Mbps, WI-FI5 mode. It can be seen as an integrated MT7615N.
2.4G wireless external four FEM chip, model is RTC7626, integrated PA and LNA.
The parameters of the RTC7626H are as follows.
Frequency range: 2.4 – 2.5 GHz 3 V to 5 V single supply voltage
Integrated high performance PA, LNA with bypass function, and SP3T switch
Input & output fully 50 ohm matching
Integrated positive slope power detector +21 dBm linear output power at 3% EVM, 802.11g 64 QAM, 54 Mbps, 5 V Small 16L QFN 2.5×2.5×0.75 mm 3 package
RoHS / Halogen Free Compliant Moisture Sensitivity Level : MSL 3
Displays high power in general.
5G chip, consisting of two parts, one is MT7975AN, the other is MT7911AN, forming the MT7915A solution. Support 4x4mimo 5G, the highest rate of 2402Mbps at 80MHz bandwidth.
5G does not have an external amplifier chip, the signal strength is not bad, with Xiaomi 4C in the downstairs D point measurement speed of 180Mbps. performance with XDR3230, Mercury X32G the same.
Flash memory model is EN25QH128A-104HIP, capacity 16MB.
The model number is MT6380 is the power management chip, WI-FI6 requirements for power management is increasingly high.
At this point, the XDR3250 disassembly is complete.
The potential of this MT7622+MT7915 solution lies in the good possibility of brushing third-party firmware later.
Finally the whole machine was restored, but…. Found how an extra piece of ceramic heat sink? There is no way out, and then disassemble and glue it back.
The hardware of XDR3230, XDR3250 and Mercury X32G are.
MT7622B + “MT7915A” + 256MB RAM + 16MB SPI flash memory. The signal strength of the three is basically the same; all do not support 160MHz, the demand for 160 bandwidth, these do not have to consider, you can consider XDR5430, Redmi AX6.