With the Western Digital mycloud appearance is very similar to the size of a 3.5-inch hard drive box, the disadvantage is that there are only two LAN ports.
Power output specifications 12V/1A, standby power of about 5W.
Two LAN ports and one WAN port, both Gigabit.
There is a physical button on the front, short press is the WPS function, long press is the MESH networking function, in the menu of MESH can not be checked, but long press this key will automatically open the MESH function, really strange operation.
Cross-sectional size: 10 × 6.5cm, the height seems to be 18cm. placement is really space-saving!
Bottom label, product name: Gigabit dual-band WIFI6 router; product model TY-6202A.
The four pads are four screws, screw out to take out the motherboard:
The shell material feels better than TY400’s.
The bottom has an iron plate to do counterweight, placed not easy to fall.
The familiar black heat sink:
Two PCB dual-band antennas.
Remove the two screws and pull out the motherboard, see the bottom also has a cooling aluminum plate.
The bottom of the motherboard has a shield.
Open the shield, which is empty.
Now back to the back of the motherboard.
Motherboard size 10x10cm.
After removing the heat sink and shield.
Continue to pry open the shield.
CPU model is Broadcom’s BCM6755, quad-core 1.5GHz, A7 architecture. Integrated dual-band 2x2mimo, support Wi-Fi 6, integrated a gigabit PHY.
The BCM6755 is a dual 2×2 Wi-Fi 6 system-on-a-chip (SoC) communications processor that enables low power, small size, multi-gigabit access points, routers, repeaters and service provider gateways for residential applications. The SoC features a quad-core 1.5 GHz ARM Cortex CPU with a dual 802.11ax two spatial stream (2×2) WLAN radio and an integrated 802.3-compliant Gigabit PHY.
The switch core model is BCM53134O, integrated with 4 Gigabit PHYs, supports VLAN and Link aggregation, and Link aggregation depends on whether the firmware supports it.
The TY6202A has 2 LAN ports connected to the BCM53134O and the WAN port connected to the BCM6755. This can be seen from the alignment in the diagram below. I think the connection bandwidth between the switch chip and CPU is 2.5Gbps.
Properties of the BCM54314 series.
• 4xGPHY integrated, 1xRGMII and 1xRGMII/SGMII cost-effective smart-managed Gigabit switch
• 1G/2.5 Gbps SGMII interface
• Integrated on-chip 8051 microcontroller for cable diagnostics and green-power saving modes
• IEEE 802.1p, MAC Port, TOS, and DiffServ QoS for six queues, plus two time sensitive queues
• 128 Compact field processor (CFP) entries rules
• Broadsync™ HD for IEEE 802.1AS support
Below the CPU there is a magnesium memory particles, from the silkscreen “D9PTK” can be found on the model MT41K128M16JT-125:K, DDR3-1600 256MB.
The flash chip is on the other side, the model is Huabang W25N01GVZEIR, with 128MB capacity.
2.4G wireless without external FEM chip. The two small chips below are RF transceiver and transmitter switching switches.
5G has two external FEM chips, the model number is RTC7676.
But it has 2 different versions, one is RTC7676 and the other is RTC7676HM, I don’t know which version it belongs to, the parameters of the two are a little different. The following chart red box location.
1.8% EVM = -35dB EVM, in 256QAM (WiFi 5), the amplification power difference of 0.5dBm, is not significant. But the difference in receive gain (Rx Gain) is a bit larger.
1% EVM = -40dB EVM, in 1024-QAM (WiFI 6) under the corresponding parameters is the same +20 dBm. usually compared to 1024-QAM, to use -43dB EVM to do, the above table does not give this data.
The pin definition of RTC7676 is the same as QPF4506B, so theoretically it can be used interchangeably, if after re-adjustment and impedance matching, otherwise, as I manually replaced it myself, the signal is poor aA.
So far TY6202A on the disassembly is complete. The chip model summary chart is as follows.
Finally with Xiaomi 4C and Xiaomi 10 in the downstairs D point location speed test to see, broadband 300 megabytes, 5G channel 44, separated by a wall of floor.
TY6202A has twice the downlink speed than ZN-M2, but the uplink speed is much slower, I don’t know why.
The results for the Xiaomi 10 are as follows.