Samsung GT-I9500 Service Manual page 79

Level 3 Repair
2. IR LED
Abnorma IRLED Part
Check the Voltage
VCC_1.8V_AP,VCC_2.8V_AP
Check the Voltage
check the voltage when
barcode active mode
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Yes
C756 = 3.4V
Yes
R1002 = 1.8V
R1003 = 1.8V
Yes
R1046 = 1.8V
R716 = 1.8V
IRLED
operate correctly?
Yes
END
No
Resolder U600 or U1001
No
Resolder U1001 or heat over UCP5000
Resolder U1001 or heat over UCP5000
No
R716,717,718,719,720,721,722,1,723,726
No
8-47
or Q701 or resolder
change RCV module