腾达AX1803拆机

Tengda AX1803 disassembly

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Someone said Tengda AX1803 and TY6201A the same chip, so bought one back to see, the price of $ 15.

腾达AX1803拆机

This is a carrier custom machine, the box is written on it. When I received it, the factory settings were restored to the default AP mode, if you want PPPOE dial-up Internet access you have to turn off AP mode in the system settings, There is a network cable in the accessories.

腾达AX1803拆机

The power output specification is 12V/1A, and the measured standby power is 4W.腾达AX1803拆机

There are 3 LAN and one WAN, one LAN port has IPTV function. the IPTV port is connected to this “IPTV/3” LAN port, the TV box is connected to the router’s wifi.

腾达AX1803拆机

Bottom label.

腾达AX1803拆机

Unpacking the housing.腾达AX1803拆机

The look of the motherboard seems to have seen somewhere: the

腾达AX1803拆机

The following picture shows the Tengda AX3.

腾达AX1803拆机

Tengda AX1803 and Tengda AX3, regardless of the motherboard godlike, even the bottom case is the same, is a black and white difference.

Continue.

Heatsink has two pins soldered on the motherboard, to use the tin sucker.

腾达AX1803拆机Turn the motherboard over, no heatsink on the back no shield, no major chips.

腾达AX1803拆机

Solder joints for fixing the heat sink to the motherboard.腾达AX1803拆机

Automatic tin suction nozzle is not as big as this, may use the manual tin suction device, a clean, fairly smooth. Heat sink removed.

腾达AX1803拆机

CPU model is BCM6755, quad-core 1.5GHz, A7 architecture, integrated dual-band 2x2mimo wifi6 wireless, the total wireless rate is AX1800.

BCM6755

A Gigabit network port is integrated, and as you can see from the alignment in the figure below, the BCM6755 is directly connected to the WAN port.

腾达AX1803拆机

The other three LAN ports are handled by the Gigabit switch chip BCM531340.

BCM531340

The model number of the memory chip is M15T2G16128A and the memory capacity is 256MB.

The flash memory chip model is W25N01GVZEIR with 128MB capacity.

腾达AX1803拆机

Now look at the RF circuit.

腾达AX1803拆机

The 5G FEM chip model is SKY85772-11:

SKY85772-11

The parameters of SKY85772-11 are as follows:

Integrated 802.11ax, 5 GHz PA, LNA with bypass, and T/R switch
Fully matched input and output
Integrated logarithmic power detector and directional coupler
Transmit gain: 32 dB
Receive gain: 15 dB
Small QFN (16-pin, 3 x 3 mm) package (MSL1, 260 C per JEDEC J-STD-020)

The power amplification parameters are shown in the following screenshots:

SKY85772-11

The power is +17 dBM under 1024-QAM, which is not high.

The TY6201A uses a 5G FEM model SKY85755-11, which corresponds to an amplified power of +18 dBm.

It seems that this TENDA AX1803 and TENDA AX3 are not as high as the power of TY6201A.

2.4G,, because the BCM67545 integrated PA and LNA, so manufacturers are reluctant to use external FEM in order to save costs, only a transceiver switch:.

腾达AX1803拆机

In addition to the Asus AX56U hot version of the use of independent 2.4G FEM chip, other I have removed the BCM6755 are not.

Well Tengda AX1803 disassembly is complete, do a chip summary it:

腾达AX1803拆机

Use Xiaomi 4C, 10, 11 in the downstairs D point location speed test to see.腾达AX1803拆机

From the speed measurement is not as good as TY6201A.

Interface of mesh grouping.

BCM6755 for $15

组网设计

15 dollars, the price is still good. Buy 2 sets of networking with a comfortable ah, this should be able to support the network in AP mode. Because you default is AP mode ah!

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