LG -600 Service Manual page 40

DCS RF 2nd
SAW FILTER U201 pin 5
Frequency & Power check
Frequency = 1842.8MHz &
Power >= -60dBm
YES
VC-TCXO
U212 pin 3 13MHz
Oscillation check
Frequency = 13MHz &
Power >= -5dBm
YES
LO1 VCO
U210 pin 3
Frequency & Power check
Frequency = 1482.8MHz &
Power >= -15dBm
YES
RF MAIN CHIP
U203 pin 38 or 39
Frequency & Power check
Frequency = 360MHz &
Power >= -50dBm
YES
IF SAW FILTER
U200 pin 5 or 6
Frequency & Power check
Frequency = 360MHz &
Power >= -65dBm
NO
✔ U201 soldering check
✔ U201 change another same one
✔ U212 soldering check
✔ U212 pin 4 DC 2.8V + -5% check
NO
✔ U212 pin 3 DC 1.4V + -0.1V check
✔ U212 change another same one
✔ U210 soldering check
✔ U210 pin 4 DC 2.8V check
NO
✔ U210 pin 6 control signal check
( >= 0.7Vp-p )
✔ U210 pin 1 high Voltage check
✔ U210 change another same one
NO
✔ U203 soldering check
✔ U203 change another same one
NO
✔ U200 soldering check
✔ U200 change another same one
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