Samsung galaxy S4 I9500 IR LED Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy S4 I9500 IR LED Not Working Solution Step By Step
Step 1
Abnorma IRLED Part

Step 2

Check the Voltage
VCC_1.8V_AP,VCC_2.8V_AP
C756 = 3.4V


Resolder U600 or U1001

Step 3

Check the Voltage
R1002 = 1.8V
R1003 = 1.8V


Resolder U1001 or heat over UCP5000\

Step 4

check the voltage when
barcode active mode
R1046 = 1.8V
R716 = 1.8V

Resolder U1001 or heat over UCP5000
or Q701 or resolder

R716,717,718,719,720,721,722,1,723,726

Step 5

IRLED
operate correctly?


change RCV module

Step 6

END
Unofficial Support Site For This Phone By Welcome Zone Haldwani
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