LG CU920 Manual page 134

4. TROUBLE SHOOTING
MEDIA_FLO SIG_GEN
SETUP
Frequency:719 Mhz
Outpower: -50 dBm
M_FLO RADIATION
CONNECTION
Check RBR1000 POWER
VREG_MFLO_2.6V
VREG_MSMP_2.7V
YES
Check MBD1000 POWER
VREG_MSMC_1.25V
VREG_MSMA_2.6V
YES
CHECK
TCXO_19.2Mhz
DETECTED SIGNAL?
YES
CHECK M_FLO RF PATH
CONNECT SEMIRIGID CABLE
Next page Continued
only CU920
LGE Internal Use Only
VREG_MSMP_2.7V R902
VREG_MSMC_1.25V R923
VREG_MSMA_1.25V R926
VREG_MFLO_2.6V R907
NO
CHECK POWER LINE
TO RBR1000 FROM PMIC
MSMC_LOW LEVEL
VOLTAGE 1.25V
CHECK POWER LINE
NO
TO MBD1000 FROM PMIC
CHEHCK VREG_MSMC_1.25V
LOW LEVEL
NO
CHECK TCXO
MODULE
REMOVE 22NH
CN803
1
L911
2p
CU920 MEDIA FLO CHECKING FLOW
- 136 -
TCXO19.2Mhz
R909
15nH
C935
NA
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes