View Full Version : Battery tatus unknown!?
Hi!
I have 4 Sagem 922 with the same problem: “Battery unknown!” when turn on. Phones also don’t take charge. I changed charging controller, but nothing. Anybody knows how to repair this?
IS NOT BATTERY CONTANTS PROBLEM!!!
i have the same problem with 8 mw3026. can anybody advice som usefull information
best regards
linda2000ua
09-29-2003, 16:17
I have no solution, but some time ago I have problem with outgoing calls with not good akku. Well, after add capacitor to the supply one (yellow under lcd - 477) phone write - "unknow battery" May be it help you.
.:hack3r2k:.
09-29-2003, 19:19
Hi !
I got read of this problem by rewritting the eeprom on both m41/m51. But not allways this problem come from bad eep settings.
best regards,
.:hack3r2k:.
gsmsalers
09-29-2003, 19:31
Hey.
Check the backside 4 baterey connector for baterey. All of them can fully touching surface.
Also change baterey. Check your charger. Hopes it can help
it is not the problem i checked the contacts battery and the charger.
proxy_gsm
10-07-2003, 22:31
try by change P200 - 6pin's ic.
giorgi2002
10-07-2003, 23:14
if any have pictures for sagem board i send repear solution
please send board pictures
giorgi2@europeonline.com
usernome
12-10-2003, 06:21
Your mail is not working !!! (giorgi2@europeonline.com)
Oxo_Boxo
12-10-2003, 19:25
Hi2all
The problem occurrence while phone can't read battery ID resistor...
Possible cause is a:
bad battery ID resistor (change batt!);
bad wireing between batt connector and ASIC chip - for 9xx chip is SAGEM 18599662-5 ( check wires and resolder all connected components);
bad ASIC chip ( change/resolder ASIC);
Bad PCB - destroyed or some deformation(no solution!);
:cool:
linda2000ua
03-30-2004, 09:15
Problem solved. (At Mx9xx. But i think at other models not big difference)
Battery Pin-out:
1- +Vbatt
2- -Vbatt (Gnd)
3- Indicator battery type
4- At board must be closed to GND
Beetwen pin 3 and 4 at battery set resistor. Resistance - battery type . I have two type - 7k5 and 13k. At board set capasitor.
Pin 3 through fuse or resistor (0 ohm) (white or black smd near pin 3 ) go to the 21 pin interface IC (18599662-5). The resistence beetwen pin 3 and GND on board must been 150 - 2500 ohm.
Chek all this values. And good luck.
P.S. At my board resistence beetwen pin 3 and GND go to Mohms. And after change interface IC all problems solved.