PG-1210 Service Manual
Step 2-3
Fig.6-4 U505 PAM’s PCB Layout
6.5.3 Power Amplifier Module
Step
Test
point
Typical Value
Condition
Checking Point
3-1
U505
Pin#2
Logic High
2, 3, 4
Check route connection : TX_PA
Logic High
3, 4
3-2
U505
Pin#4
Logic Low
2, 5, 6, 7
Check this pin 2, When Logic High,
then DCS/PCS Mode. While Logic
Low , GSM850 mode is operating.
40
PANTECH
