Antenna Switch Module - Pantech GB310 Service Manual

GB310 Service Manual

6.5.5 Antenna Switch Module

Step Test point
U320
5-1 2.6V
Pin#11
U320
5-2 2.6V
Pin#2
Typical Value Condition
2
3
STEP 5-2
Fig. 6-10 U320 Antenna Switch Module Circuit
11
Fig. 6-11 U320 Antenna Switch Module PCB Layout
1
PANTECH
Check point
When Pin#11 is Logic High and Pin#2
is Logic Low the mode is GSM 850
band.
While Pin#2 is Logic High and Pin#11
is Logic Low the operating mode is
PCS band.
2
STEP 5-1