LG CU920 - Media FLO Block Troubleshooting Guide

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