Eric T28s battery problem - GSM-Forum

flashman · 10-09-2002, 22:25

Can anyone help me with this?
My T28 has good battery and when it is fully recharged, it working good. When the battery is empty and I switch off phone I can't to switch it on, charging doesn't working too, on battery is 3,4V (empty). It is to low voltage to start it on?
Thank U

b0ba · 10-09-2002, 23:40

Reflash phone. 3.4v is enough voltage to power phone's logic.

WBR B0BA

iliescu_l · 10-10-2002, 09:32

Battery is the only one problem.There is a resistor in your battery.You can put a strap in his place.Excuse my english

flashman · 10-10-2002, 15:16

thank you,
I will check it, but I haven't any newer soft for flashing, can you give me link or send me it here [email protected]
Thank you

flashman · 10-10-2002, 15:25

for iliescu_l
thank for answer but can you tell me where that resistor placed???
thank

b0ba · 10-10-2002, 22:13

As I know Ericsson phones identify batterys connected to it. The resistor mentioned I think is "Battery Temperature". But not in LiIo or LiPl batterys unles you have Chines one, LiIon battery schematics pretty complicated.
That was just my opinion.

WBR B0BA

iliescu_l · 10-11-2002, 06:08

There is a resistor with white color.Is the only one in that battery.try it.

flashman · 10-11-2002, 19:20

I discover new strange thing.
When I have T28 logged on network and normaly working, I can see that display is change contrast- lighten, darken in 3 to 5 second cycle. (It's hard to see)
is this ok?

How the battery resistor replace or strap can help me ???
I was tried tree bateries, all of then was Li-Pol ultraslim BUS-10 3,6V 500mA maded in Sweden.

Thank for all

paygee · 10-13-2002, 19:56

hi, if ur phone shows contrast changing in start up and also when u make a call,,,it is pa ,replace power amplifier ,ur battery problem also will be resolved.

flashman · 10-13-2002, 20:11

thank U,
but my phone changing contrast when it's on standby mode (logged on network), may be U right, I will test it.
Thank U very much

george gsm · 10-13-2002, 23:06

hi again flashman,
your batery i thing is good. my experience say : check the double diod from bottom left side of the board. u will find a piece with 3 pins near a driver (5pins) who respond about handsfree and micro+speaker.
geo

flashman · 10-14-2002, 20:53

Thank U george gsm,
I will try...

10-09-2002, 22:25	#1 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	Eric T28s battery problem Can anyone help me with this? My T28 has good battery and when it is fully recharged, it working good. When the battery is empty and I switch off phone I can't to switch it on, charging doesn't working too, on battery is 3,4V (empty). It is to low voltage to start it on? Thank U

10-13-2002, 19:56	#9 (permalink)
paygee No Life Poster Join Date: May 2002 Location: asia Age: 53 Posts: 711 Member: 11742 Status: Offline Thanks Meter: 1	@flashman hi, if ur phone shows contrast changing in start up and also when u make a call,,,it is pa ,replace power amplifier ,ur battery problem also will be resolved.

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10-09-2002, 23:40	#2 (permalink)
b0ba No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 43 Posts: 895 Member: 6772 Status: Offline Thanks Meter: 17	Reflash phone. 3.4v is enough voltage to power phone's logic. WBR B0BA

10-10-2002, 09:32	#3 (permalink)
iliescu_l Insane Poster Join Date: Jul 2002 Location: romania Age: 43 Posts: 91 Member: 14017 Status: Offline Thanks Meter: 0	Battery is the only one problem.There is a resistor in your battery.You can put a strap in his place.Excuse my english

10-10-2002, 15:16	#4 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	thank you, I will check it, but I haven't any newer soft for flashing, can you give me link or send me it here [email protected] Thank you

10-10-2002, 15:25	#5 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	for iliescu_l thank for answer but can you tell me where that resistor placed??? thank

10-10-2002, 22:13	#6 (permalink)
b0ba No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 43 Posts: 895 Member: 6772 Status: Offline Thanks Meter: 17	As I know Ericsson phones identify batterys connected to it. The resistor mentioned I think is "Battery Temperature". But not in LiIo or LiPl batterys unles you have Chines one, LiIon battery schematics pretty complicated. That was just my opinion. WBR B0BA

10-11-2002, 06:08	#7 (permalink)
iliescu_l Insane Poster Join Date: Jul 2002 Location: romania Age: 43 Posts: 91 Member: 14017 Status: Offline Thanks Meter: 0	There is a resistor with white color.Is the only one in that battery.try it.

10-11-2002, 19:20	#8 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	I discover new strange thing. When I have T28 logged on network and normaly working, I can see that display is change contrast- lighten, darken in 3 to 5 second cycle. (It's hard to see) is this ok? How the battery resistor replace or strap can help me ??? I was tried tree bateries, all of then was Li-Pol ultraslim BUS-10 3,6V 500mA maded in Sweden. Thank for all

10-13-2002, 20:11	#10 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	thank U, but my phone changing contrast when it's on standby mode (logged on network), may be U right, I will test it. Thank U very much

10-13-2002, 23:06	#11 (permalink)
george gsm No Life Poster Join Date: Jul 2002 Location: Bucharest-Romania Age: 51 Posts: 1,160 Member: 14200 Status: Offline Sonork: Sonork id Thanks Meter: 117	hi again flashman, your batery i thing is good. my experience say : check the double diod from bottom left side of the board. u will find a piece with 3 pins near a driver (5pins) who respond about handsfree and micro+speaker. geo

10-14-2002, 20:53	#12 (permalink)
flashman Insane Poster Join Date: Mar 2002 Posts: 99 Member: 10015 Status: Offline Thanks Meter: 0	Thank U george gsm, I will try...