LG LG-V909DW - Page 68

4. TROUBLE SHOOTING
- 68 -
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4.3.4 Checking RF Tx block
GSM Transmit Block
Wrong Power Level
Is TP3 or 4 over below spec?
GSM850 : 32dBm
PCS, DCS : 29dBm
FEM Check
yes
no
Is TP5 or 6 over below spec?
GMSK-Typical 10dBm
8PSK-Typical 3.5dBm
PAM Check
no
Check MDM RF Block
no
BATT Power okay?
TP1
Check a Power
No
FEM Output is okay?
TP2
Check RF switch
yes
yes
yes
Wrong Power Level
Is TP3 or 4 over below spec?
GSM850 : 32dBm
PCS, DCS : 29dBm
FEM Check
yes
no
Is TP5 or 6 over below spec?
GMSK-Typical 10dBm
8PSK-Typical 3.5dBm
PAM Check
no
Check MDM RF Block
no
BATT Power okay?
TP1
Check a Power
No
FEM Output is okay?
TP2
Check RF switch
yes
yes
yes
Chart 2 GSM Transmit Block sequence