View Full Version : MC920 network (not) working
flashman
10-09-2002, 23:06
Please need your help,
I have MC920, when I switch it on, phone find out network (sometimes I can make a call),but after small while no network and after some next sec. phone connect to network...
I mean that may be some RX or TX saw filter,but I havent any experience with sagems (no schematics or layout).
please help me.
Thank you
chris922
10-10-2002, 09:24
Hi!
This can ba a hardware or a software problem...
If its software, its dependend from some eeprom fields.
Try to get fields 144, 188 and 7 from other phones (Same model) and write them ito your phone and test again.
flashman
10-10-2002, 16:23
I think that it isn't soft problem, this described problems comes randomly. It's not stabil wrong.
I mean that it is in RF area,but haven't any schematics or descripions of RF parts...
than you for all replyes.
happygolucky12
10-10-2002, 20:54
My phone used to do that , same model 920 , i put another phones ( working phones ) log file into it with sagem dr and changed the imei to my phones and changed the line 251 , now it is working fine , see if it works for you
Try to heat pcb with BGA chips with hot air gun.
flashman
10-11-2002, 20:07
I reflowed BGA chips, but nothing change.
happygolucky12 - I don't exactly understand how can log help me?!
bad checksums or what is in the log???
happygolucky12
10-11-2002, 21:07
I put a working phones , a phone which had no problem , software into my mc 920 , i made a text file , with the help of sagemdr , write eeprom to text file , of the working phone .
Then i put this text file into my phone , again with the help of sagem dr .
Before putting this working software file into my phone i changed the imei in field 0 to my phone imei and change field 251 to a working code
It started working.
All with the help of sagemdr.
flashman
10-12-2002, 00:39
yes,whith your change settings your eeprom you change setting of your RF module and so on, but my phone was under water:(
It should me meny things wrong,but only problem with holding on the network.
Thank you happygolucky12,you are good sagemworker..
flashman
10-12-2002, 00:45
to chris922,please can you explane me something about modifying fields you described before??
what this fields mean ?
Thank you very much
intersoft
10-27-2004, 18:39
i have 2 piece with same problem
network saw but when calling beep signal came and call not connected
and also not receiving calls