TENDA AX3 Disassembly AX1800 WIFI6 Wireless Router

Arrival price $30

Open package.

Comes with a network cable.

Power output specifications 12V/1A, the actual measurement of the special machine power 3.8W, belongs to the low power consumption.

Rarely see the Tengda peripheral antenna body is white, the texture of this shell is a bit like TP-link.

Back interface: one WAN port + 3 LAN ports, full Gigabit. There is a 3 network port with IPTV function, many models of Tengda have this function, practical.

Bottom of the fuselage.

Four antenna layout.

I haven’t bought a Tengda router for a long time, and the last one was a Tengda AC21 more than six months ago.

The bottom two screws are taken out to remove the shell, there is no warranty label.

Unpacking the TENDA AX3, I saw a black heat sink with a small area and no shield. I thought the workmanship and materials of TENTA were better, but tanyi TY301 and TY6201 both have shields. Although I can’t tell the substantial difference between a shield and no shield, if you have to tell me the difference is the weight, yes, there is a difference in weight.

The 2.4G has no external FEM chip, while the 5G has an external FEM. so the 2.4G signal of this wireless router is very average. It is not because there is no FEM and the signal is not sent, but itself BCM6755/6750 integrated 2.4G signal performance is not good.

Turn over to see what is not on the back of the motherboard. The result is that there is nothing, no auxiliary cooling stuff.

Flip back to the front and now want to remove the only heat sink:

Found another heatsink welded to the motherboard, and this foot is a little crooked:

On the soldering iron + tin sucker, remove this heat sink:

Actually, I don’t need to take it down to see the CPU, because I’m 100% sure it’s BCM6755, but I took it apart to make sure.

CPU is as follows, the model is BCM6755, quad core 1.5GHz, “Quad Core ARM-A7 with 32 KB I/D caches and 512 KB L2 cache”

Integrated 2x2mimo 2.4G and 5G with 802.11ax support. 2.4G at 40MHz bandwidth up to 573Mbps, 5G at 80MHz bandwidth up to 1201Mbps.

Only one gigabit port is integrated, so this solution requires an external gigabit switch chip, most use Broadcom’s own, but also available realtek’s.

The Gigabit switch chip model is BCM53134.

The memory chip model is W632GU6NB-11 with 256MB capacity.

The flash chip model is F50L1G41LB, ESMT’s SPI NAND Flash Memory, with 128MB capacity.

The 5G FEM chip model is SKY85772-11 with integrated PA and LNA.

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 specific parameters of the amplification power are not clear.

With Xiaomi 4C in the downstairs D point measured about 100Mbps, very general. Expected.

The following figure is the 2.4G body frequency circuit, no external FEM chip, silkscreened with “SP4” is the chip is the transceiver and transmitter switch.

Chip silkscreen fonts are very clear, directly on the main picture, point open large you can see the chip model:

This is the end of the disassembly.

Nothing to summarize.

Did not find a mesh networking function.

For home use, the small area can be considered.