LG U8110 Service Manual page 177

4. TROUBLE SHOOTING
Check GSM/DCS Rx IQ data at 1.
Check if there is any Major
difference.
Refer to Figure 4-46.
Check GSM/DCS Rx IQ signal 2.
Refer to Figure 4-47.
Check GSM/DCS Rx IQ signal
level at 2.
Refer to Figure 4-48.
QRB
QRA
Figure 4-48. Ingela IQ signal
No
Similar?
Yes
No
Similar?
Yes
IQ signal
: 200mV ?
Yes
GSM Rx path OK.
- 178 -
No
VDIG_HERT A= 2.7V?
Yes
Redownload SW
Resoldering VCCA block
(L1120,L1200,L1202,R1335)
See next page to check Rx path
Reso ldering R1150