31.05.21

Motorola Confidential Propriet
ary

1

Overview of flip PCB

Display connector

CLI connector

Hinge flex connector

ATI 2282

Camera connector

31.05.21

Motorola Confidential Propriet
ary

2

Cannot take picture (1)

1.

Download the software image (1FF) into the problem unit and recheck the camera function

2.

Open the flip and check whether the connector is properly inserted

3.

Take out and plug in camera connector again

4.

Change camera module

5.

Check the camera plug and receptacle under microscope

6.

Check whether the camera flex is damaged or not

7.

Check all the signals between ATI 2282 and camera module when starting camera function:

i.

Input signals

•

CAM_RESET = High

•

CAM_PWRDWN = low

•

CAM_CLK_IN = 15.37MHz

•

VCAM = 2.8V; VBUCK = 1.8V; GSDRAM = 1.8V

•

CAM_SCL and CAM_SDA

ii.

output signals

•

CAM_CLK_OUT=50.9MHz

•

CAM_D[0]-[7]

•

CAM_HSYNC

•

CAM_VSYNC

31.05.21

Motorola Confidential Propriet
ary

3

Cannot take picture (2)

schematics of camera connector

31.05.21

Motorola Confidential Propriet
ary

4

Cannot take picture (3)

Signal positions to probe

CAM_CLK_IN

CAM_CLK_OUT

Camera connector

CAM_PWRDWN

CAM_REG

VBUCK

GSDRAM_REG

CAM_SCL

CAM_SDA

31.05.21

Motorola Confidential Propriet
ary

5

Camera abnormal

Camera blemish in viewfinder mode

•

Check whether the cover lens is clean or not

•

Remove whether there is particle inside the camera lens under microscope

•

Change camera module

Camera color abnormal

•

Open the flip and make sure the connector is properly inserted

•

Take out and plug in camera connector again to check the issue is resolved or not

•

Check the plug and receptacle under microscope

•

Probe camera data lines and see any signal is missing

•

Change camera module if the problem is due to the module

Camera flickering

•

Check whether the flickering is due to display and camera

•

Check the power frequency used in the region: 50Hz or 60Hz

•

Use RadioComm to read out the flicker setting: Element iD: 0x4A, Record #:0x1; offset:

0x1C8; Length:0x01: if the value read back is 0x01, it is for 50Hz; if the value is 0x02, then

it is for 60Hz. This value need to be matched to the AC power frequency used in the region.

31.05.21

Motorola Confidential Propriet
ary

6

Display abnormal

If only main display is abnormal:

–

Check whether any LED is not functional

–

Download the software image into the problem unit

–

Open the flip and check whether the display connector is properly inserted

–

Take out and plug in the display connector again

–

Change a display module

–

Check the 40 pin receptacle under microscope

–

Check whether the display flex is damaged or not.

If CLI display is abnormal:

–

Open the flip and check whether the ZIF connector is pressed properly or not

–

Change to a new CLI display

–

Check whether the original CLI display is cracked or flex damaged

If both CLI and main display are missing:

–

Download the software image into the problem unit

–

Change a flip and see whether the issue is gone

–

Change a main board and see whether the issue is gone

–

Change the hinge flex

–

Check the open and short on the signal LCD_DATA[0]-[7],LCD_RS, LCD_CS, LCD_RD, and

ATI_RESET

31.05.21

Motorola Confidential Propriet
ary

7

Display schematics