7650 low battery when place call - GSM-Forum

XARiUS · 03-06-2004, 10:28

Hi... My girlfriend 7650 even with the battery fully charged, says "low battery" when i place a call! It is similar to the 3310 problem! When i made the selftests with griffin, i got a ST_BACKUP_BATT_TEST failed! I've opened mobile, measured voltage in backup battery, and it was 0! So, i think i need to replace it! Can this backup battery lead to a problem like the one i'm describing above? does somebody know how to fix this? Can i replace ML414R with a backup battery from a 6210?

Tnx...
XARiUS

XARiUS · 03-07-2004, 21:36

Nobody can help me?

Regards...
XARiUS

MAJESTIC PIRATE · 03-07-2004, 21:53

reflash your phone using griffin box with v 5.6 , user code , set factory setting , format limited , test then format user area . if have a power faileur reflash your phone again without format user area. if still the same change PA ............

webmoly · 05-30-2004, 19:16

there is VDR inside charging part of your cell phone, try to find it in service manual and remvoe it or change it.

this VDR decrease battery voltage for CPU, as the CPU get a low battery the message will diplay in screen.

have fun

thecult · 11-09-2004, 16:02

@webmoly: could you explain more pls? I can't understand what is vdr

very thanks

b.r.

thecult

webmoly · 11-10-2004, 02:40

hi

VDR is a kinda resister, u have to change them.

have fun
moly

thecult · 11-10-2004, 10:14

thx for explay webmoly

b.r.

akshay · 11-10-2004, 20:38

Quote:

Originally Posted by webmoly

there is VDR inside charging part of your cell phone, try to find it in service manual and remvoe it or change it.

this VDR decrease battery voltage for CPU, as the CPU get a low battery the message will diplay in screen.

have fun

can u pls... explain VDR part no mean {Wjich part no ?? in service manuals ?? }

@kki

webmoly · 11-11-2004, 08:45

hi
give urself a try, I dont have its service manual, if i had, I would have explained more,
have fun

kokos · 01-10-2005, 13:38

ADC-offset over limits:
Inspect BSI line, connectors (hotbar and board to board connector) and components in it
(Varistor R008, EMI-filter Z383, Pull-up resistor R384). If these are OK, change UEM.
BSI Gain over limits:
Inspect BSI line, connectors (hotbar and board to board connector) and components in it
(Varistor R008, Capacitor C002, EMI-filter Z383, Pull-up resistor R384). If these are OK,
change UEM.
Btemp Gain over limits:
Inspect Btemp line, connectors (hotbar and board to board connector) and components
in it (Varistor R006, Capacitor C010, EMI-filter Z383, Pull-up resistor R383). If these are
OK, change UEM.
Vbatt offset and Gain:
Inspect Vbatt lines and component in it.
Vchar over limits:
Inspect components which are connected Vchar line: Filtering capacitors C005, C006,
C011, TVS V009, L001 and Fuse F001. If those are OK, Change UEM
Ichar over limits:
Inspect components which are connected at Vchar line: Filtering capacitors C005, C006,
C011, TVS V009, L001 and Fuse F001. If those are OK, First change current sense resistor
(R190), if calibration is not still successful change UEM.

these are clopy pasted from the service manual i suspect r008 should be faulty i have a similar problem and cannot find a component like the one in question has nybody changed from another model to this one and solved problem?
thanks and i hope somebody found it usefull..

03-06-2004, 10:28	#1 (permalink)
XARiUS Freak Poster Join Date: May 2002 Location: Portugal Age: 42 Posts: 267 Member: 12207 Status: Offline Thanks Meter: 2	7650 low battery when place call Hi... My girlfriend 7650 even with the battery fully charged, says "low battery" when i place a call! It is similar to the 3310 problem! When i made the selftests with griffin, i got a ST_BACKUP_BATT_TEST failed! I've opened mobile, measured voltage in backup battery, and it was 0! So, i think i need to replace it! Can this backup battery lead to a problem like the one i'm describing above? does somebody know how to fix this? Can i replace ML414R with a backup battery from a 6210? Tnx... XARiUS

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03-07-2004, 21:36	#2 (permalink)
XARiUS Freak Poster Join Date: May 2002 Location: Portugal Age: 42 Posts: 267 Member: 12207 Status: Offline Thanks Meter: 2	Nobody can help me? Regards... XARiUS

03-07-2004, 21:53	#3 (permalink)
MAJESTIC PIRATE Freak Poster Join Date: Dec 2003 Location: E G Y P T Age: 47 Posts: 336 Member: 45635 Status: Offline Thanks Meter: 20	reflash your phone using griffin box with v 5.6 , user code , set factory setting , format limited , test then format user area . if have a power faileur reflash your phone again without format user area. if still the same change PA ............

05-30-2004, 19:16	#4 (permalink)
webmoly Freak Poster Join Date: May 2004 Location: Iran - Qum Age: 43 Posts: 449 Member: 66171 Status: Offline Thanks Meter: 6	there is VDR inside charging part of your cell phone, try to find it in service manual and remvoe it or change it. this VDR decrease battery voltage for CPU, as the CPU get a low battery the message will diplay in screen. have fun

11-09-2004, 16:02	#5 (permalink)
thecult No Life Poster Join Date: Feb 2002 Location: burning phones Posts: 1,704 Member: 9700 Status: Offline Thanks Meter: 62	@webmoly: could you explain more pls? I can't understand what is vdr very thanks b.r. thecult

11-10-2004, 02:40	#6 (permalink)
webmoly Freak Poster Join Date: May 2004 Location: Iran - Qum Age: 43 Posts: 449 Member: 66171 Status: Offline Thanks Meter: 6	hi VDR is a kinda resister, u have to change them. have fun moly

11-10-2004, 10:14	#7 (permalink)
thecult No Life Poster Join Date: Feb 2002 Location: burning phones Posts: 1,704 Member: 9700 Status: Offline Thanks Meter: 62	thx for explay webmoly b.r.

11-11-2004, 08:45	#9 (permalink)
webmoly Freak Poster Join Date: May 2004 Location: Iran - Qum Age: 43 Posts: 449 Member: 66171 Status: Offline Thanks Meter: 6	hi give urself a try, I dont have its service manual, if i had, I would have explained more, have fun

01-10-2005, 13:38	#10 (permalink)
kokos Freak Poster Join Date: Sep 2004 Location: Hellas Age: 47 Posts: 146 Member: 83893 Status: Offline Thanks Meter: 1	ADC-offset over limits: Inspect BSI line, connectors (hotbar and board to board connector) and components in it (Varistor R008, EMI-filter Z383, Pull-up resistor R384). If these are OK, change UEM. BSI Gain over limits: Inspect BSI line, connectors (hotbar and board to board connector) and components in it (Varistor R008, Capacitor C002, EMI-filter Z383, Pull-up resistor R384). If these are OK, change UEM. Btemp Gain over limits: Inspect Btemp line, connectors (hotbar and board to board connector) and components in it (Varistor R006, Capacitor C010, EMI-filter Z383, Pull-up resistor R383). If these are OK, change UEM. Vbatt offset and Gain: Inspect Vbatt lines and component in it. Vchar over limits: Inspect components which are connected Vchar line: Filtering capacitors C005, C006, C011, TVS V009, L001 and Fuse F001. If those are OK, Change UEM Ichar over limits: Inspect components which are connected at Vchar line: Filtering capacitors C005, C006, C011, TVS V009, L001 and Fuse F001. If those are OK, First change current sense resistor (R190), if calibration is not still successful change UEM. these are clopy pasted from the service manual i suspect r008 should be faulty i have a similar problem and cannot find a component like the one in question has nybody changed from another model to this one and solved problem? thanks and i hope somebody found it usefull..