Checking Flow
START
Is the voltage level VBATT
3.2-4.2V?
Are all LEDs LED404~417
working?
Q400, R410 is working?
Charge or Change Battery and try again
Check the soldering of each R or
replace LEDs not working
Check the condition of Q400, R415.
If problem, Change Q400, R415.
No
No
No
Yes
Yes
Yes
BACKLIGHT WILL
WORK PROPERLY
Check the signal level at
KEY_BACK_EN=high?
Replace MSM
No
Yes
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Summary of Contents for ID2750
Page 33: ...DCN Mode Graph 4 2 1763 04MHz DCN384 Z 3 X B O X C O M ...
Page 37: ...Waveform DP101 Pin 7 Graph 4 3 c DP101 Pin2 Graph 4 4 c Z 3 X B O X C O M ...
Page 48: ...Circuit Diagram Z 3 X B O X C O M ...
Page 49: ...Figure 4 3 1 PMIC PM6610 FUNCTIONAL BLOCK DIAGRAM 4 3 Logic Part Trouble Z 3 X B O X C O M ...