Huawei Mediapad 7 Does Not Turn On

In the tablet arsenal of the large and already well-known Chinese manufacturer Huawei, the MediaPad line is today the main and main. In February last year, we introduced readers to the first representative of the series. Over time, it has grown, introducing new branches. A ten-inch analogue of the usual MediaPad was the Huawei MediaPad 10 FHD. A more modest in terms of their characteristics, they comprised, respectively, Huawei MediaPad 10 Link and Huawei MediaPad 7 Lite. Recently it became known about the release of the second version of the last of these tablets, and we hastened to get it for review.

Detailed specifications of Huawei MediaPad 7 Lite 2

  • Model Number: S7-601U (on the case), MediaPad 7 Lite II (on Android)
  • Single Chip System: HiSilicon K3V2
  • CPU: 4 cores ARM Cortex-A9 @ 1.2 GHz
  • GPU: 2 Vivante GC4000 @ 400-600 MHz cores
  • Display: IPS, 7 ″, 1024 × 600, 170 ppi
  • RAM: 1 GB
  • Internal memory: 8 GB
  • 3G / EDGE / GSM
  • Wi-Fi 802.11b / g / n, Bluetooth 3.0
  • GPS
  • Cameras: 0.3 megapixel front, 3.1 megapixel rear
  • Micro-USB (with OTG support), 3.5 mm headset jack, Mini-SIM
  • Accelerometer, compass, proximity, orientation and lighting sensors
  • Battery capacity: 4350 mAh
  • Operating System: Google Android 4.1.2
  • Size: 192 × 121 × 9 mm (as stated)
  • Weight: 337 g (measured during testing)

The platform of the new Huawei MediaPad 7 Lite 2 is borrowed from the already familiar Huawei MediaPad 10 FHD. Of course, there is nothing original here, but compared with the first generation Lite, this is a big step forward. For comparison, we chose seven-inch tablets on a variety of SoCs, among which Intel Lexington stands out, which ensures the operation of the recently tested ASUS Fonepad.

In addition, according to our observations, Huawei MediaPad 7 Lite 2 is identical in its characteristics and appearance to another new product of the Chinese company. MediaPad 7 Vogue. The model number of the tablet indicated on the case, S7-601U, corresponds to it. However, company representatives (and information about the tablet in Android) claim that Huawei MediaPad 7 Lite 2 was sent to us for testing. Therefore, we will use a double name.

measured in the edition, except for Huawei MediaPad Lite and Google Nexus 7, for which manufacturer data is indicated

Equipment

Huawei MediaPad 7 Lite 2 came to us for testing without packaging and delivery, so we can not say anything about them.

Design

Huawei MediaPad 7 Lite 2 retained the basic design elements of its predecessor in a slightly modified form. Thus, at first glance, the proximity of devices is noticeable, and the appearance of the entire line becomes recognizable.

Huawei Mediapad 7 Does Not Turn On

On the glossy front panel is the manufacturer’s logo, a camera lens for video chat and a speaker.

The back panel, as in the original MediaPad Lite, is formed by an aluminum cover and two symmetrical matte plastic inserts. But here they acquired a rounded shape, which made the tablet more elegant, corresponding to its second name. Vogue. In the middle of the upper insert there is a rear camera lens, and under it is a small slot in the main speaker, which is very easy to block with your finger, almost completely drowning out the tablet.

The front and rear panels are separated by a thin plastic frame in a light gray hue.

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Between it and the rear panel are embedded plastic on / off and volume buttons, which have a short but clear stroke.

On the same side are the slots for the memory card and SIM card covered by a plug. The correct installation position for the latter is indicated by a tiny pictogram on the frame with the edge. Although the connectors are equipped with springs, they can cause problems: it is difficult to reach the inserted SIM card without using a thin tool.

In the lower left corner of the tablet there is a Micro-USB connector, a 3.5-mm audio output for connecting a headset, and between them is a microphone hole. Given its location, using Huawei MediaPad 7 Lite 2 (Vogue) as a phone is convenient only if you hold it near your left ear.

Video: Huawei Mediapad 7 Does Not Turn On


Screen

The screen of the tablet is covered with a glass plate with a mirror-smooth surface and, judging by the reflection of bright light sources in it, does not have any anti-glare filter. In the near future we will present you a review of the Senkatel Smartbook 6 tablet, in which we examined in detail the reflective properties of the screens of several mobile devices. In the meantime, we restrict ourselves to the comment that in the test for attenuation of reflection, the screen of Huawei MediaPad 7 Lite 2 took the last place. The surface of the matrix itself under the glass is slightly matte, so the screen reflects both direct light sources (the outer surface) and diffused light (the surface of the matrix), this reduces readability in conditions of strong external illumination. The reflection in the screen doubles (or even triplets), which suggests the presence of an air gap between the surface of the matrix and the outer glass. On the outer surface of the screen there is a special oleophobic (grease repellent) coating. The effectiveness of this coating is very low, but still fingerprints do not appear as fast as in the case of ordinary glass, but they are removed a little easier.

With manual brightness control, its maximum value was about 370 cd / m², and the minimum was 15 cd / m². The maximum value is quite high, but there is no margin, so in bright daylight the image on the screen is unlikely to be clearly visible, especially considering the absence of an anti-glare filter and the matte surface of the matrix. In complete darkness, the brightness can be lowered to a comfortable level. Automatic brightness control by light sensor works (it is located to the left and below the front speaker). In total darkness, in automatic mode, the brightness decreases to 60 cd / m² (acceptable), in an office lit by artificial light, the brightness is set to 325 cd / m² (it is not necessary to do so brightly), and in a brightly lit environment (corresponds to illumination on a clear day outdoors , but without direct sunlight) rises to the same 325 cd / m² (and needs to be increased to a maximum). As a result, this function works unsatisfactorily, as the brightness rises too quickly to the limit of adjustment, but remains below the maximum possible value. At low brightness, there is no backlight modulation (up to 100 kHz), so there is no flickering of the backlight.

This tablet uses an IPS type matrix. Microphotographs show a typical IPS subpixel structure:

At the same time, we present another micrograph with a lower resolution and focus on the film covering the matrix:

Visible dots are not flies hatched, but artificially created surface defects that create the effect of a matte finish. The screen has good viewing angles without inverting colors and without significant color shift even with large deviations of the gaze from the perpendicular to the screen. The black field when diagonally deflected becomes very bright and, depending on the direction of the deviation, acquires a violet hue or remains almost neutral gray. With a perpendicular view, the uniformity of the black field is average, since in several places close to the edge there are areas with a slightly increased black brightness. The contrast is good. about 1060: 1. The response time for the black-white-black transition is 26 ms (14 ms on 12 ms off). The transition between the midtones of 25% and 75% (according to the numerical value of the color) and vice versa in total takes 42 ms.

In the properties settings of the screen, you can select the option Screen backlight, when it is turned on, dynamic brightness control starts to work. the backlight brightness decreases slightly (on bright, on average, images are stronger than on dark ones). Note that all the results presented here were obtained with the option turned off. Screen backlight. The gamma curve constructed from 32 points did not reveal any blockage in the light or shadow, and the approximating power function index was 2.44, which is slightly higher than the standard value of 2.2, while the real gamma curve slightly deviates from the power dependence:

The color gamut is noticeably narrower than sRGB:

Apparently, the matrix filters mix the components together. Spectra confirm this:

This technique allows you to increase the brightness of the screen at the same energy consumption for backlighting, but the colors lose in saturation. The color temperature balance is not very good: shades of gray have a color temperature higher than the standard 6500 K, and the deviation from the spectrum of an absolutely black body (ΔЕ) is much higher than 10 (due to an excess of the green component, which also increases brightness to the detriment of color reproduction). Well, at least the variation in color temperature and ΔE is small, which positively affects the visual perception of color balance. Dark areas of the gray scale can be ignored, since there the color balance does not matter much, and the measurement error at low brightness is high.

In total, the screen belongs to the extremely budget version of IPS and has not the lowest brightness. However, this is his only advantage negated by the absence of an anti-glare filter and the matte surface of the matrix under the glass.

Platform and Performance

Huawei MediaPad 7 Lite 2 is based on the HiSilicon K3V2 Hi3620 platform manufactured by HiSilicon Technologies, a division of Huawei. The characteristics of the system on a chip are as follows:

  • Processor: ARM Cortex-A9 (ARMv7 architecture), 4 cores @ 1.2 GHz
  • Video processor: Vivante GC4000, 2 cores @ 400-600 MHz
  • 450 MHz LPDDR2 memory support
  • Support for hardware decoding of 1080p30 video and camera resolution up to 20 MP

The information about the tablet features the mysterious GPU HiSilicon Technologies Immersion.16, detailed information about which we could not find. However, we found a mention of a partnership agreement with HiSilicon on the Vivante website and, in addition, in the Huawei Ascend Mate, the Vivante GC4000 was hiding behind the same characteristics.

The amount of RAM Huawei MediaPad 7 Lite 2 (Vogue) is 1 GB, which is currently the standard for budget tablets. Let’s move on to the tests.