FORUMS

What Are the Best Looking Apps on Android?

As more developers are updating their apps with Material Design elements, we’re … more

Cyngn Explained: Who’s Cyanogen, What’s Cyanogen OS?

While Cyanogen, Inc has been the source of many headlines lately, there … more

Verizon Moto X 2014 Receives Root On Kitkat 4.4.4

The Verizon Moto X 2014 has finally received root, albeit only on Kitkat 4.4.4 … more

Android 5.1.1 Released, Google Cell Service – XDA TV

Android Lollipop 5.1.1 has been released. That and much more news is covered … more
Post Reply Subscribe to Thread Email Thread

Camera I have disassembly and repaired the lenovo k900

15th June 2014, 05:48 PM |#1  
maximlemea's Avatar
OP Junior Member
Flag Florence
Thanks Meter: 6
 
More
Hi guys i bought this device a few days ago, fascinated by the design and performance, I wanted a phablet 5.5 and I could not resist at good price but when it arrived it had audio problems.
I thought the firmware could have problems, but it worked in bluetooth handsfree and then I did not understand why.
Having experience in microelectronics with my work repairs transceivers I could not resist and I opened it.
Well I managed transaction, it works fine now and the owners of this beautiful phablet who want to see what's inside you can watch the album that I uploaded in the profile.
Greetings to all. max

Pardon for the foto , update directly on post now .

1 back of K900 with 4 torx screw and his screwdriver T06x50
(turn the screws to the left and then take them off and put them in a glass so as not to lose them)

2 how to separe live parts from bottom with razor blade
(insert the blade in a very kind and gentle, making a small force to the outside of the body until they snap the little plastic teeth that hold the body of the display with the shell, there are 3 teeth on the short sides and 4 in those long)

3.1 internal of bottom
(the inner part of the shell contains the contacts for the antennas and for the metallic screen)

3.2 all in one after open
(around the block phablet, we can see the 2500ma battery, the motherboard with L-shape, a lower block with micro usb, speaker and microphone, and an upper block with cameras inside and outside, proximity sensor, LED flash and the small headset, the vibrator has a round shape)

3.3 allin1 without back
(view of the whole, is very compact and simple, and the distribution of the components makes it easy disassembly and reassembly)

4.1 remove battery
(the battery is simply attached to the body with a small layer of double-sided adhesive, easily removed by pulling the tab transparent and removing the connector with a toothpick, making a slight force to lever)

4.2 zone two camera , earpiece , vibrator and proximity sensor
(to remove the motherboard, unscrew the small black screws with a Phillips screwdriver, there are 7 screws, one is covered by a sticker type security seal around the LED flash, on the other hand to remove the upper frame of the camera there are 2 white screws, the I have not removed the bottom for comfort)

4.3 remove small motherboard
(pay attention to the layout of the connectors and remove them again using a toothpick to avoid damaging the delicate tracks of the circuit, remove the motherboard and place it in a safe place, preferably on a sheet of paper and not plastic electrostatic)

5 back display dissasembly back wiew
(after releasing the back of the display from the motherboard and the top frame I discovered that the small headset was placed upside down and the contacts did not touch on the slopes of the circuit itself, I measured with a multimeter and it was ok 31 ohms , helped by a lens I checked on the contacts of the circuit if this were the marks left from the headset but were not present, a clear reference to a wrong installation)

6 rear of earpiece with contacts and reference
(the offending piece, you can see the notch and the corresponding joint in the display, well, when I opened it was the opposite, in fact the phablet worked with Bluetooth and Handsfree)

7 reassembly and test before closed
(I reassembled everything by reversing the procedure, taking care to insert the camera frame by repositioning the headset correctly, the vibrator and by matching with a lot of patience and chassis backplane, repositioning and tightening the screws excessively , reconnecting the battery and inserting the sim I turned it on, I checked that it worked by calling the remaining credit service , then I turned it off and removed the sim to close permanently)
Attached Thumbnails
Click image for larger version

Name:	1 back of K900 with 4 torx screw and his screwdriver T06x50.jpg
Views:	1308
Size:	78.9 KB
ID:	2824537   Click image for larger version

Name:	2 how to separe live parts from bottom with razor blade.jpg
Views:	1435
Size:	69.9 KB
ID:	2824540   Click image for larger version

Name:	3.1 internal of bottom.jpg
Views:	1395
Size:	85.3 KB
ID:	2824541   Click image for larger version

Name:	3.2 all in one after open.jpg
Views:	1363
Size:	35.8 KB
ID:	2824542   Click image for larger version

Name:	3.3 allin1 without back.jpg
Views:	1290
Size:	88.2 KB
ID:	2824543   Click image for larger version

Name:	4.1 remove battery.jpg
Views:	1266
Size:	30.8 KB
ID:	2824544   Click image for larger version

Name:	4.2 zone two camera , earpiece , vibrator and proximity sensor.jpg
Views:	1262
Size:	30.3 KB
ID:	2824545   Click image for larger version

Name:	4.3 remove small motherboard.jpg
Views:	1134
Size:	25.9 KB
ID:	2824546   Click image for larger version

Name:	5 back display dissasembly back wiew.jpg
Views:	1144
Size:	28.3 KB
ID:	2824547   Click image for larger version

Name:	6 rear of earpiece with contacts and reference.jpg
Views:	1141
Size:	26.9 KB
ID:	2824548   Click image for larger version

Name:	7 reassembly and test before closed.jpg
Views:	1133
Size:	28.4 KB
ID:	2824549   Click image for larger version

Name:	8 lock screen after complete reassembly ok.jpg
Views:	1072
Size:	84.8 KB
ID:	2824550  
Last edited by maximlemea; 29th June 2014 at 10:56 PM.
The Following 5 Users Say Thank You to maximlemea For This Useful Post: [ View ]
 
 
29th June 2014, 03:27 PM |#2  
XtriFe's Avatar
Senior Member
Flag Santo Domingo
Thanks Meter: 17
 
Donate to Me
More
Quote:
Originally Posted by maximlemea

Hi guys i bought this device a few days ago, fascinated by the design and performance, I wanted a phablet 5.5 and I could not resist at good price but when it arrived it had audio problems.
I thought the firmware could have problems, but it worked in bluetooth handsfree and then I did not understand why.
Having experience in microelectronics with my work repairs transceivers I could not resist and I opened it.
Well I managed transaction, it works fine now and the owners of this beautiful phablet who want to see what's inside you can watch the album that I uploaded in the profile.
Greetings to all. max

thanks, where do we find the pictures ?
29th June 2014, 10:59 PM |#3  
maximlemea's Avatar
OP Junior Member
Flag Florence
Thanks Meter: 6
 
More
update
Quote:
Originally Posted by XtriFe

thanks, where do we find the pictures ?

Sorry , i update the thread with all procedure directly on post
The Following User Says Thank You to maximlemea For This Useful Post: [ View ]
4th July 2014, 05:42 PM |#4  
COJR3's Avatar
Member
Flag Gaziantep
Thanks Meter: 6
 
More
Great work. Thanks for sharing
4th July 2014, 06:16 PM |#5  
maximlemea's Avatar
OP Junior Member
Flag Florence
Thanks Meter: 6
 
More
Please, if I can help with my experiments this beautiful community are more than happy to share them

Sent from my Nexus 4 using XDA Premium 4 mobile app
25th July 2014, 10:45 PM |#6  
Junior Member
Thanks Meter: 0
 
More
I had an issue with my Lenovo too back in January and had disassembled it as well. Mine was having issues with the flex cable, so I bought a new one and replaced it. It seems like the nex flex cable is also having problems though.
26th July 2014, 12:17 PM |#7  
Member
Flag Italy
Thanks Meter: 2
 
More
Big Thanks 4 Info!


How to replace digitalizer?
5th August 2014, 07:44 PM |#8  
Junior Member
Thanks Meter: 0
 
More
Great, thanks.
How you fixed the piece?
8th August 2014, 09:40 AM |#9  
maximlemea's Avatar
OP Junior Member
Flag Florence
Thanks Meter: 6
 
More
Replace for AleSSi0, for digitalizer you tell me the toucscreen?
8th August 2014, 09:52 AM |#10  
maximlemea's Avatar
OP Junior Member
Flag Florence
Thanks Meter: 6
 
More
Replace for kensami, the part in question is blocked by a circuit board in a a square side of front chassis
Post Reply Subscribe to Thread
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Top Threads in K900 General by ThreadRank