doc:appunti:hardware:kingelon_g9000
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doc:appunti:hardware:kingelon_g9000 [2014/12/29 11:42] – [Headset connector] niccolo | doc:appunti:hardware:kingelon_g9000 [2015/03/09 16:16] – [Disassembling the G9000] niccolo | ||
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* mmcblk0p7 2416640 blocks (**2.3 Gb**) mounted as **''/ | * mmcblk0p7 2416640 blocks (**2.3 Gb**) mounted as **''/ | ||
* mmcblk0p8 4058112 blocks, (**3.9 Gb**) mounted as **''/ | * mmcblk0p8 4058112 blocks, (**3.9 Gb**) mounted as **''/ | ||
+ | * Display: 1080 x 1920 | ||
* Operating system: Android 4.4.2 | * Operating system: Android 4.4.2 | ||
* Kernel: 3.4.67 | * Kernel: 3.4.67 | ||
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10.200.148.163 dev ccmni0 | 10.200.148.163 dev ccmni0 | ||
</ | </ | ||
+ | ===== Disassembling the G9000 ===== | ||
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+ | After three months of use, the phone started suffering from **charging problem**. | ||
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+ | 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. | ||
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+ | It was not a cable or connector problem, it turned out that the power connector required a **soldering reflow**. Fortunately only a partial disassemble of the phone was required: just removing the **back frame** you can detach the **power board**. | ||
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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' | ||
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+ | 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: 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. | ||
===== Link ===== | ===== Link ===== | ||
doc/appunti/hardware/kingelon_g9000.txt · Last modified: 2017/11/17 11:27 by niccolo