Sencor Element 7 V3

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Sencor Element 7 V3
SE7V3 front.jpg
Manufacturer Sencor
Dimensions 182mm x 121mm x 11mm
Release Date April 2013
Website Device Product Page
Specifications
SoC A13 @ 1Ghz
DRAM 512MiB DDR3 @ 384MHz (Elpida J2108BCSE-DJ-F)
NAND 4GB
Power DC 5V @ 1.5A, 3250mAh 3.7V Li-Pol battery
Features
LCD 800x480 (7" 16:9)
Touchscreen 5-finger capacitive (Silead GSL1680)
Audio 3.5mm headphone plug, internal speaker, internal microphone
Network WiFi 802.11 b/g/n (Ralink RT5370N)
Storage µSD
USB USB2.0 OTG
Camera 0.3MPx (640x480) front

Sencor Element 7 version 3 is a standard Q8 format, A13 based tablet.

Contents

Identification

On the back of the device, the following is printed:

element 7
version 3

SENCOR®
Internet Tablet with 7" Capacitive display
and 4GB Memory

The PCB has the following silkscreened on it:

SAQ8-A13 V1.2

In android, under Settings->About Tablet, you will find:

  • Model Number: ELEMENT 7V3
  • Build Number: nuclear_evb-eng 4.0.4 GC0308_5370_1680_7660_MSM

Sunxi support

Current status

Supported, but lacks mainline kernel support and likely some driver support in sunxi kernel.

Manual build

You can build things for yourself by following our Manual build howto and by choosing from the configurations available below.

U-Boot

Sunxi/Legacy U-Boot

Use the q8_a13_tablet build target.

Mainline U-Boot

Use the q8_a13_tablet build target.

Linux Kernel

Sunxi/Legacy Kernel

Use the sencor_element7v3.fex file.

Mainline kernel

Use the sun5i-a13-sencor-element7v3.dts device-tree binary.

Tips, Tricks, Caveats

FEL mode

Either Vol+ or Vol- button triggers FEL mode. Simply hold the button and then connect to the USB port.

No success entering Boot1 for me, but ./fel version, LiveSuit/PhoenixSuit flashing and booting over USB works fine.

Hardware problems

The device is of typical cheap chinese quality, so if you happen to be already inside it playing god, it may be worthwhile to check for hardware problems.

Adding a serial port (voids warranty)

Element7's UART pads

Device disassembly

Identical with Q8 Format disassembly. To access the PCB backside, unplug the three flex cables and unscrew the three PH0 screws. Turn the board over on the battery, then remove the plastic cover glued to the backside.

Locating the UART

UART solder pads are in the middle on the back-side of the PCB. Device's TX is the one closer to the USB port.

Note 1: I am receiving no output during boot or Boot0 FEL mode; only serial_noise seems to work for me. It maps to /dev/ttyS1 (so it needs editing the script.bin or the kernel arguments).

Note 2: The diagnostic pads are easily torn off from the PCB (maybe not suitable for soldering to).

If despite those caveats you decide to try for yourself, here's how: UART howto.

Pictures

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