LG LG9200 Service Manual page 88

TX Part Trouble Shooting(4)
5. Check PAM Circuit
➀ PAM input and output
PAM
U503
GSM PCS VBAT
OUT OUT
• Tx Carrier Frequency
- GSM 190Ch. : 836.6MHz
- PCS 661Ch. : 1880.0MHz
• PAM output power
- GSM : about 33dBm
- PCS : about 30dBm
GSM
PCS
IN
IN
- 101 -
4. TROUBLE SHOOTING
Check these points with High
Frequency Probe.
You can see RF signal at
Spectrum Analyzer !