LG KG70c Service Manual page 34

KG70C
3.2.5 Check PAM Circuit 3.2.5 Check PAM Circuit
Test Point Test Point
Circuit Diagram Circuit Diagram
Pin#8 Pin#8
Pin#2 Pin#2
Vcc2 Vcc2 RF_OUT RF_OUT
U102 U102
U104 U104
Pin#1 Pin#1 Pin#2 Pin#2
Vcc1 Vcc1 RF_ IN RF_ IN
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Pin#7 Pin#7
Q100 Q100 Q100
Figure 3-2-5 Figure 3-2-5
Pin#4 Pin#4
VREF 2 .85V VREF 2 .85V