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Item
Bright dot (sub-
pixel) defect
Dark dot (sub-
pixel) defect
Total
3
Temporal sub-
pixel defect
Not allowed
Not allowed
Note:
Blinking pixels are not allowed in normal operating temperatures and light conditions.
Introduction to display troubleshooting
The display module used is based on TFT technology and supports display format of 360 columns x 640 rows.
The dimension of the display module is 43.2 mm x 76.8 mm x 1.8 mm. The module will interface to the phone
via FPC with a 25 pins ZIF connector.
The following references on the PWB help in the effective debugging and troubleshooting of the display.
Sr No
Reference
Description
1
X1650
Display connector
2
Z1620, Z1621
Common Mode Choke on DSI bus
3
D1400
BCM2763 IC
The following test points on the PWB help in the effective debugging and troubleshooting.
Sr. No
Signal name
Measuring point
Description
1
VIO
L1620/C1620
1.8V supply to display
2
VAUX1
L1621/C1622
VAUX1 supply to display
RM-779
BB Troubleshooting and Manual Tuning Guide
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