doc:appunti:hardware:kingelon_g9000
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doc:appunti:hardware:kingelon_g9000 [2015/03/09 12:32] – [Disassembling the G9000] niccolo | doc:appunti:hardware:kingelon_g9000 [2017/11/17 12:27] (current) – [The Android System Recovery menu] niccolo | ||
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- Power-off the phone and detach any USB cable. | - Power-off the phone and detach any USB cable. | ||
- | - Keep pressed the **volume + button** while pressing the **power button**. | + | - Keep pressed the **Volume UP button** while pressing the **power button**. |
- Release the buttons, after the Welcome logo you get the broken Android icon. | - Release the buttons, after the Welcome logo you get the broken Android icon. | ||
- Press the **power button once**, you get the menu. | - Press the **power button once**, you get the menu. | ||
**WARNING!** **There is a bug** in the Recovery, buttons does not work as stated: | **WARNING!** **There is a bug** in the Recovery, buttons does not work as stated: | ||
- | * To **navigate** the menu use only the **volume - button** | + | * To **navigate** the menu use only the **Volume Down button** |
- | * To **select** the menu item use the **volume + button** | + | * To **select** the menu item use the **Volume Up button** |
* The power button does not work, it just hide/show the menu | * The power button does not work, it just hide/show the menu | ||
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10.200.148.163 dev ccmni0 | 10.200.148.163 dev ccmni0 | ||
</ | </ | ||
- | ===== Disassembling | + | ===== Charging problem: disassembling |
- | After three months of use, the phone started suffering from **charging problem**: when the power supply was connected, sometimes begin a loop of //charger plugged/ | + | After three months of use, the phone started suffering from **charging problem**. |
- | The power connector required a **soldering | + | Sometimes **the orange LED did not light-up** when the power adapter was plugged; sometimes a crazy loop of messages //charger plugged// - //charger unplugged// begun, which can result in phone crash. Sometimes, when the phone was plugged for the nightly charge, the orange LED turned on, but the morning after the phone was completely discharged ad the LED was off. Sometimes applying a light force to the USB connector (blending it toward the back of the phone) seemed to help, but everything was extremly unreliable. |
+ | |||
+ | It was not a cable or connector problem, it turned out that the power connector required a **soldering | ||
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+ | Remove the 10 screws which keep the back frame. Divaricate the metal-plated frame from the screen glass using your thumb' | ||
+ | |||
+ | The **power board** at the bottom is secured with a single **screw**. Before removing it, detach the **antenna cable** and pull the **vibrator** out from its seat, where is secured with some adhesive. | ||
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+ | Now you can rotate the power board and see the **flat connector**. The **white piece of plastic** keeps the connector locked-in: flip it, so the connector is released. | ||
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+ | Now the power board is free and you can reflow the soldering. I put very little **soldering flux** over the contacts, a bit of **tin** (a good **silver-alloy**) on the soldering iron. I used a 2 mm soldering tip, larger than the contacts, so I used very few tin for a very short time. Clean the flux with a needle, **cotton swab and alcohol**; inspect closely to avoid short-circuits. | ||
+ | |||
+ | After some days of use, it seems that **the charging problem is solved**. | ||
===== Link ===== | ===== Link ===== | ||
doc/appunti/hardware/kingelon_g9000.1425900733.txt.gz · Last modified: 2015/03/09 12:32 by niccolo