华硕AC85P拆机

Asus AC85P disassembly

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华硕AC85P拆机

The parameters of the outer packaging lists 2.4G rate 600Mbps, 5G rate 1733Mbps, a total of AC2400, with the ASUS PCE-AC88 wireless card connected to the AC85P 2.4G rate is 800Mbps, so ASUS in the firmware did not lock the 2.4G 3x3mimo, is a complete dual-band 4 × 4. Although the external only three not Although there are only 3 external non-removable antennas, there is one built-in, for a total of 4 antennas.

华硕AC85P拆机

Fuselage front.

华硕AC85P拆机

Fuselage back

华硕AC85P拆机

Power supply I am not sure if it is the original, the power supply does not have the ASUS logo:

华硕AC85P拆机

The power supply is the same as the specifications on the back of the unit, which is 12V/2.5A.

华硕AC85P拆机

Indicators on the front panel.

华硕AC85P拆机

The nameplate label on the back of the machine tear off, take out the two screws and open the disassembly:
华硕AC85P拆机

Separate housing.华硕AC85P拆机Looked used to the Asus with blue motherboard, this one used green, a little uncomfortable. Zoom in on the motherboard.

华硕AC85P拆机

4 detachable antenna feedline connectors.

华硕AC85P拆机

Remove the motherboard.

华硕AC85P拆机

On the other side of the motherboard.

华硕AC85P拆机

Motherboard size.

华硕AC85P拆机

First remove the side without the heatsink at the beginning, right, with the mesh and heatsink this side will see later.

Remove the shield.

华硕AC85P拆机

Each left and right a chip, connected to the antenna socket, is necessarily a wireless chip, the left side does not have an external amplifier, the right side has an external amplifier.

华硕AC85P拆机

The left is a 2.4G wireless chip, model MT7615N, 4x4mimo, 256-QAM, with a maximum rate of 800Mbps at 40Mhz bandwidth. 2.4G does not have an external independent amplifier chip.

华硕AC85P拆机

The one on the right is a 5G wireless chip, also model MT7615N, 4x4mimo, 256-QAM, with a maximum rate of 1733Mbps at 80Mhz bandwidth, which is 1.7Gbps.

华硕AC85P拆机

The hardware solution is the same as the Netgear R6800, which also has the QPF4519 5G amplifier chip.

QPF4519 parameters are as follows.

5150 – 5925 MHz
POUT = +23dBm MCS9 VHT80 -35dB dynamic EVM
POUT = +24.5dBm MCS7 HT20/40 -30dB dynamic EVM
POUT = +25dBm MCS0 HT20 spectral mask compliance
160MHz bandwidth and MCS11 capable
Optimized for +5 V operation
32 dB Tx gain

Look at the MCS9 VHT80 that line on the line, amplification power + 23dBm = 200mW, is considered medium-high power. And the actual test 5G signal is very strong.

Disassembled Xiaomi AX3600, its 5G amplifier chip is QPF4588, in the corresponding MCS9 VHT80 a parameter, is also +23dBm = 200mW.

There is a shield above the two wireless chips, which is empty, this location should be directly below the CPU, it has a flash memory chip on the left, the model is MX30LF1G18AC-TI, capacity 128MB.

华硕AC85P拆机

Turn over the other side and remove the large aluminum heat sink:

华硕AC85P拆机

There are also three metal shields.

华硕AC85P拆机

USB3.0 interface did not do shielding.

华硕AC85P拆机

Removal of three shields.

华硕AC85P拆机

The two left and right are empty and responsible for the shield of the two wireless chips. There are two chips on the top, which should be the CPU and memory.

华硕AC85P拆机

Remove the heat-conducting silicone pad, apply thermal silicone grease, and make the silkscreen lettering clear. there are many alignments leading to the network transformer because the CPU MT7621AT integrates a five-port gigabit switching chip. the MT7621AT is a dual-core 880MHz CPU, which is most familiar to everyone. Next to it is the memory chip, model number W632GG6MB-12, with 256MB capacity.

华硕AC85P拆机

W632GG6MB-12

Part of the power supply circuit.

华硕AC85P拆机

That big piece of heat dissipation.

华硕AC85P拆机

Hidden an antenna, in fact, is also common AC68U external antenna inside the antenna body, just remove the antenna housing. Not the PCB board antenna. The following figure.

华硕AC85P拆机

To summarize.

华硕AC85P拆机

Asus AC85P finished dismantling.

The 5G signal is stronger than the Redmi AC2100.

If MTK’s WIFI6 program can also add such a high power amplifier, 5G signal strength is likely to be stronger than the current Redmi AX5, Xiaomi AX1800, Huawei AX3 Pro. I really do not want MT7615N + QPF4519 is the highest point.

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