User Guide

5-21 Flow chart of Troubleshooting and Circuit Diagram
5-13 GSM Transmit
Tx On (level : 5)
U704
Pin 8
30 dBm
U704
Pin 5
30 dBm
U701
Pin 4
30 dBm
U701
Pin 1
0 dBm
Resolder
CON700
Check
VC1 : L
VC2 : H
Change or Resolder
U704
Resolder
U700
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Check
Ant. S/W, Control Circuit
Check
U701 : +VBATT
Pin 2 (APC)
OK?
Resolder or
Change U701
Yes
Check +VBATT
or APC Control
No
U600
Pin 25
7 dBm
Resolder or Change
C611, R604
No
Yes
U600
pin 12, 13
pin 9, 10
-6 dBm
Resolder
U503
U600
Pin 5, 6, 7, 8
40 mV
Resolder
OneC(U400)
Resolder
U600
No
No
Yes
Yes