cromax P310 User manual

P310 L2 Service Manual

P310 L2 Service Manual
Product introduce
Model ：P310
Product size：188.4*108.3*10mm
Platform：MTK8317 ，Quad 1.0GHz
Memory：4GB+1GB(Nand&sdram+RAM）
System：Android 4.1.2
Frequency band: Dual-SIM WCDMA 900/2100MHz，GSM 900/1800 MHZ
Battery：2800mAh
Charger: Travel charger
USB cable: MICRO 5PIN
Earphone：3.5jack
LCD&TP：resolution: 1024*600，Capacitance TP
Camera：2.0M+0.3M
Support：FM,GPS，BT4.0，WIFI
Support：G-sensor

P310 L2 Service Manual
1. Tools list
I. Tweezer Cross
II. Screw driver
III. Solder
IV. Tommy bar
V. Hot gun

P310 L2 Service Manual
2. Cover Plate disassembly
Open the cover plate，as the Fig. 1
FIG.1
COVER PLATE

P310 L2 Service Manual
3. Back case disassembly
Insert tommy bar into the gap between middle frame and back case, then
slide it slowly along the gap, as the Fig.2
FIG.2

P310 L2 Service Manual
4. Disassemble battery&speaker&mic&motor
First, remove battery with soldering iron. Then remove the four screws as
shown in the fig.3 to disassemble speaker holder and antenna holder.
FIG.3
FIRST REMOVE
FOUR SCREWS

P310 L2 Service Manual
5. Tear off conduction tape and high temp tape，as the Fig.4
FIG.4

P310 L2 Service Manual
6. The main components distribution，as the fig.5
FIG.5
TOUCH IC
CPU/DDR/PMU
FLASH
WIFI+BT MODEL

P310 L2 Service Manual
7. Remove the three screws and open the LCD con. & TP con.,as the fig.6
FIG.6
TF CON
LCD CON

P310 L2 Service Manual
8. Remove main board from case，as the FIG.7
FIG.7

P310 L2 Service Manual
9. Remove camera ，as the FIG.8
FIG.8
CAM

P310 L2 Service Manual
10.Receiver disassembling, as the fig.9
FIG.9
RECEIVER

P310 L2 Service Manual
11. Exploded view
MIC
MOTOR
CAM
SPK
RECEIVER
PCBA
COVER
PLATE
HOLDER
HOLDER
BACK
CASE
MIDDLE
FRAME
BATTERY
LCD

P310 L2 Service Manual
L1 & L2 Repairing guide
1. LCD
Check the SW is correct, otherwise to upgrade the SW;
Check the LCD is ok, otherwise change a new LCD;
Ifthe LCD loose, re-assemble the LCD and test;
Checking the LCD connector is ok, otherwise re-solder it or change a new
one;
Check the circuit around the LCD connector.
LCD CONNECTOR

P310 L2 Service Manual
2. Camera
Check the camera assemble correctly, otherwise re-assemble the camera
and test;
Cross test with a good camera, and check the camera is ok;
Check the camera connector is ok as shown in the below picture,
otherwise re-solder or change a new one;
Check the circuit around the camera connector.
CAM CONNECTOR

P310 L2 Service Manual
3. Touch Pannel
Check the SW is correct, otherwise to upgrade the SW;
Check the FPC of TP is correct, otherwise re-assemble it;
Cross test with a good TP;
Check the TP connector is correct, otherwise re-solder or change a new
one;
Check the circuit around the TP connector.

P310 L2 Service Manual
4. Ringer
Check the shrapnel of speaker is ok;
Check the resistance of speaker is ok, otherwise to change a new one;
Check the FPC is ok;
Check SPK-FPC connector with sub-board is ok.
SPEAKER

P310 L2 Service Manual
5. Receiver
Check the shrapnel of receiver is ok;
Check the resistance of receiver is ok, otherwise change a new one;
Check the connector point on the main board is ok, as shown in the below
picture;
Check the receiver circuit is ok.

P310 L2 Service Manual
6. MIC and Vibrator
Check the MIC and Vibrator is cold soldering, otherwise re-solder it;
Change the MIC and Vibrator;
Check the circuit of MIC and Vibrator;
Check the FPC is connect correctly.
MIC
VIBRATOR

P310 L2 Service Manual
7. Earphone
Check the shrapnel of earphone is ok;
Check the connector point on the main board is ok, as shown in the below
picture;
Change earphone connector;
Check the circuit of earphone is OK.
EARPHONE