A Look Inside

It's time now to strip this NAS down to discover what components it is hiding inside its casing.


Taking apart the KD22 surely isn't an easy procedure. It also takes a lot of courage since you will have to push and pull its plastic and metallic parts around hard in the process, and the unit will emit several different "cracking" sounds while you do. Our experience with the KD20 also helped us a lot since the dismantling procedure was generally the same. You absolutely must remove the screws that are located near to the front door's hinges first to take the plastic panel at the front off. Like the KD20, the enclosure consists of two parts – one plastic and the other aluminum.


The metallic chassis houses the HDD trays and the Wi-Fi antenna.


A close view of the PCIe expansion card that holds the two SATA connectors for the HDDs – a metallic cover protects it.


The front panel of the KD22 is made out of plastic and includes the on/off switch.


The mainboard of the KD22 is really small, but hosts all the components this NAS needs.


Some close-up shots of the main PCB.


The brain of the KD22 is a single-core Marvell 88F6707 SoC clocked at 1.2 GHz. Its TDP is so low that it doesn't even have a passive heatsink. It is accompanied by 512 MB of DDR3 RAM (Hynix H27U1G8F2BTR). Next to the CPU we find the 2 Gbit NAND flash module, a Micron D9PFJ IC, of the NAS.


The buzzer of the KD22.


The single PCIe 1x of the mainboard is occupied by the SATA expansion card.


The USB 3.0 controller, anEtronTech EJ168A IC.


The WLAN controller is a single-chip Realtek RTL8188CE.


A Genesys Logic GL827L IC handles the single USB 2.0 port and SD-card reader.


We spotted an ANPEC APW7089 step-down converter on the mainboard. It, as its name implies, puts out a lower voltage than its input takes.


In the above photo are two voltage regulator modules (VRMs) controlled by two ANPEC APW7323. Both also come with several mosfet gate driver ICs.


The fan is provided by a company we have never come across before, APISTEC, and its model number is SA7202L (12 V, 70 mm, 0.15 A). We unfortunately have no clue what bearings this fan uses as we didn't find any relevant information on the Internet.