LG CU920 - Page 135

- 137 -
4. TROUBLE SHOOTING
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECK M_FLO RSSI
<277634#*# 4 5>
Does it read RSSI level?
CHECK M_FLO RF PATH
R950 Detected signal?
NO
CHECK CN803
NO
CHANGE M_FLO
COAXIAL CABL
E
YES
NO
YES
CHANGE FL900
CHECK M_FLO RF PATH
R905 L900 Detected
signal?
L900
R905
FL900
R950
CN803
CHECK C909
RBR1000 VCO WAVEFORM IS
NORMAL?
CHANGE
RBR1000
abnormal
normal
YES
SOFT REDOWNLOAD
AND CHANGE BOARD
YES
C909
NO
Signal level is about -51dBm
Signal level is about -53dB
m
only CU920