Battery tatus unknown!? - GSM-Forum

kreitzz · 07-27-2002, 20:07

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!!!

darkeye · 09-03-2003, 04:08

i have the same problem with 8 mw3026. can anybody advice som usefull information
best regards

linda2000ua · 09-29-2003, 15:17

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, 18:19

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, 18:31

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

darkeye · 10-06-2003, 22:20

it is not the problem i checked the contacts battery and the charger.

proxy_gsm · 10-07-2003, 21:31

try by change P200 - 6pin's ic.

giorgi2002 · 10-07-2003, 22:14

if any have pictures for sagem board i send repear solution
please send board pictures
[email protected]

usernome · 12-10-2003, 06:21

Your mail is not working !!! ([email protected])

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!);

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.

07-27-2002, 20:07	#1 (permalink)
kreitzz Freak Poster Join Date: Jan 2002 Location: Moldova Age: 44 Posts: 156 Member: 8442 Status: Offline Thanks Meter: 0	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!!!

09-29-2003, 18:19	#4 (permalink)
.:hack3r2k:. Product Manager Join Date: Aug 2002 Location: FuriouSTeaM Posts: 53,979 Member: 15022 Status: Offline Sonork: 100.53452 Thanks Meter: 61,569	... 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:.

12-10-2003, 19:25	#10 (permalink)
Oxo_Boxo No Life Poster Join Date: Jun 2002 Location: East Europe Age: 51 Posts: 3,950 Member: 12837 Status: Offline Thanks Meter: 2,740	Battery status unknow... 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!);

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09-03-2003, 04:08	#2 (permalink)
darkeye No Life Poster Join Date: Feb 2002 Location: germany Age: 49 Posts: 966 Member: 9584 Status: Offline Thanks Meter: 31	i have the same problem with 8 mw3026. can anybody advice som usefull information best regards

09-29-2003, 15:17	#3 (permalink)
linda2000ua Junior Member Join Date: Feb 2003 Location: Ukraine Age: 49 Posts: 28 Member: 22505 Status: Offline Thanks Meter: 0	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.

09-29-2003, 18:31	#5 (permalink)
gsmsalers No Life Poster Join Date: Apr 2002 Location: Flash Age: 44 Posts: 1,943 Member: 11208 Status: Offline Thanks Meter: 11	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

10-06-2003, 22:20	#6 (permalink)
darkeye No Life Poster Join Date: Feb 2002 Location: germany Age: 49 Posts: 966 Member: 9584 Status: Offline Thanks Meter: 31	it is not the problem i checked the contacts battery and the charger.

10-07-2003, 21:31	#7 (permalink)
proxy_gsm No Life Poster Join Date: Aug 2003 Location: Bangladesh Posts: 1,409 Member: 37349 Status: Offline Sonork: 100.1613413 Thanks Meter: 362	try by change P200 - 6pin's ic.

10-07-2003, 22:14	#8 (permalink)
giorgi2002 Freak Poster Join Date: Jun 2002 Location: Georgia Tbilisi Age: 47 Posts: 495 Member: 12524 Status: Offline Thanks Meter: 3	if any have pictures for sagem board i send repear solution please send board pictures [email protected]

12-10-2003, 06:21	#9 (permalink)
usernome No Life Poster Join Date: Jan 2003 Location: Iassy Age: 59 Posts: 4,314 Member: 19723 Status: Offline Thanks Meter: 359	Your mail is not working !!! ([email protected])

03-30-2004, 09:15	#11 (permalink)
linda2000ua Junior Member Join Date: Feb 2003 Location: Ukraine Age: 49 Posts: 28 Member: 22505 Status: Offline Thanks Meter: 0	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.