LG GB115 Service Manual page 92

TEST POINT
TP2
W601
TP1
TP4
U601
TP5
Mode
VLOGIC (TP3)
TXON_PA (TP4)
BS(TP5)
TP3
U602
U101
X6101
GSM900 RX PCS1800 RX
H(2.7V)
L
L
Check TP 1,2 of W601
Mobile SW & SAW filter is OK.
H(2.7V)
L
H(2.7V)
92
CHECKING FLOW
With RF cable
No
Signal is OK?
Yes
Check TP 3,4,5
Yes
No
Control Signal
is OK?
Yes
Check U602
Yes
No
Replace U602
Signal is OK?
Yes
Check Antenna
Yes
No
Replace U602
Signal is OK?
Yes
Change the PCB
Replace Mobile
SW(W601)
Check ULC2+
(U101)