ST3500 User Manual
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4. Trouble Shooting (LED Indicator)
4.1 Blue LED: Indicates WCDMA status.
WCDMA
Blink Count Remarks
Normal
1
Server Com. Error 2
<Possible Cause>
1. Server or network parameter is wrong.
2. Server is closed.
3. Temporary network barrier
WCDMA
Com.
Error
3
<Possible Cause>
1. Network parameter is wrong.
2. SIM is blocked about WCDMA using.
3. Temporary network barrier
4. Weak WCDMA signal
5. WCDMA antenna connection is not firm.
No Network
4
<Possible Cause>
1. WCDMA antenna is disconnected.
2. WCDMA antenna or socket of WCDMA antenna is
broken.
3. Device is broken.
SIM PIN Locked
5
<Possible Cause>
1. SIM PIN is enabled.
Cannot
Attach
NW
6
<Possible Cause>
1. Weak WCDMA signal.
2. WCDMA antenna connection is not firm.
No SIM
7
<Possible Cause>
1. There is no SIM or SIM is not inserted properly.
2. SIM or SIM socket is broken.
