LG Optimus L9 P760 Teardown

ID: 65336

Description: Want to know the pieces that drive this phone o...

Released in 2012 as the best phone in the L series (the other phones were L3, L5 and L7)
This phone exists in different versions : the P760 (this one), the P765 (for India), P768 (for America - and a 8 MP camera) and P769.
The specs of this phone :
CPU: Cortex A9 (dual-core @ 1 GHz)
RAM: 1 GB (0.75 GB according to the phone)
Storage: 4 GB (2.3 GB usable) + micro-SD
Screen: 4.7" IPS, 540x960.
OS: Android 4.1.2 (for the latest version - 4.2 with Cyanogen 10.1.2)

To access to the battery: easy: let it drop or lift with your thumbnails the rear cover.
The battery can be removed the same way (dropping the phone is not a good idea...)
The battery has a capacity of 2150 mAh. Not that bad but it runs out quite quickly (good point: the battery is removable)

Let's begin the fun part: with a screwdriver, let's remove the three Philips screws.
Keep the screws on a magnet not to lose them (or two: there are two types of screws in this phone: the little short and the little long screws)
This part can be lifted easily (eg: insert a flat screwdriver on the top of the part)

What does this part do?
The vibrator which... well, vibrates.
And the bottom speaker: used when you listen to music and with hands-free calls).
From the rest of the phone, the connectors are visible.

Now, to access to the motherboard and to the connectors, you are at 7 screws from it!
With a spudger (or something flat - NOT a flat screwdriver), pry the glossy part and separate it from the rest of the phone.
As a rule of thumb, a rule is somehow effective!

Here we are! Before removing the lower card, let's remove the two little screws and the cache hiding the micro USB port.
The phone, with the guts visible (almost...)

To proceed, detach the antenna and the connector.
Then, the tedious part: the board is glued to the case! Proceed wit care not to break the card (by taking the part and with a spudger).
We can note the presence of the (little) microphone. This board gathers the connectors for the vibrator, the speaker, the micro USB and the antenna. This part is quite important!

Now, the (dual-)core of the phone: the motherboard. LG was good for the board: almost everything is linked by connectors, easily removable!
Let's continue our dissasembly by disconnecting the four remaining ribbons:
The digitizer
The screen
The rear camera
The front camera and the proximity sensor
The antenna. Useful if the antenna was torn because it is easily replaceable!
Is it me or the phone includes a second antenna for dual-SIM models?

Careful, the board won't go without unscrewing this tiny screw, securing the top speaker (sorry for the quality)!

The motherboard, with the shields. With a flat screwdriver (do it if the phone is dead... Otherwise, the components beneath are fragile and may stop working).
I don't want to say wrong things so the analysis is left as an exercise for the reader.

The most interesting part for a fragile phone: the digitizer.
The connector of the digitizer can cause you trouble! Don't lift the digitizer brutally or the ribbon may tear!
Little by little, with a spudger, the both parts start separating... Be careful though!