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Sony Ericsson Hardware Repair Post here your Hardware Repairing Hints or Problems with SonyEricsson and Sony Phones. |
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10-10-2002, 18:11 | #1 (permalink) |
Insane Poster Join Date: Mar 2002
Posts: 99
Member: 10015 Status: Offline Thanks Meter: 0 | T28 backup battery What kind and voltage is this battery... I have 3,5V on my LiPol battery and 1,8V on my backup bat. ,but phone not working(can't switch on, can't charge) Whitch IC distribute power to phone??? thank U |
10-10-2002, 18:44 | #3 (permalink) |
Insane Poster Join Date: Mar 2002
Posts: 99
Member: 10015 Status: Offline Thanks Meter: 0 | I have two T28s thirst have short circuit on Lipol contacts battery second is working ok but when battery go under 3,5V phone go death and I have to charge battery by power sup. (this Lipol bat. is good mean new) Where is PA located???? Thank a lot |
10-10-2002, 21:58 | #4 (permalink) |
No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 43
Posts: 895
Member: 6772 Status: Offline Thanks Meter: 17 | PA = "Power Amplifier". Located besids antana switch, marked as RMxxx (xxx is a type of PA e.g. RM009) with Rockwell log on it. Desolder it and your phone should start and find network, but it will be unable to make calls. About second one I don't have any idea. Is your battary made in China? Try to use 100% working battary from working t28. WBR B0BA |
10-12-2002, 00:04 | #5 (permalink) |
Insane Poster Join Date: Mar 2002
Posts: 99
Member: 10015 Status: Offline Thanks Meter: 0 | Thank you b0ba my battery is good (tree peaces of working Nihm 500mAh maded in Sweden). I was wrote on other my topic, that I discover T28 display contrast blinkink (If you look good on disp. you will see it,but it hard to see), maybe it couse by hi consumption of power is so hi, I don't know.... What you mean? what about backup battery ?? is it Li acumulator? or? and what about voltage? Thank you very very much.. |
10-12-2002, 00:09 | #6 (permalink) |
Insane Poster Join Date: Mar 2002
Posts: 99
Member: 10015 Status: Offline Thanks Meter: 0 | about PA... If I remove it, (I can do that) I don't thing so that I can put it back, cause I still haven't any reball tools.... If you can advice me how or where buy or links to help me I will be very happy... thank very much again |
10-13-2002, 19:56 | #9 (permalink) |
Insane Poster Join Date: Mar 2002
Posts: 99
Member: 10015 Status: Offline Thanks Meter: 0 | New things discovered when phone normally working (on the netw.) everything ok. battery is empty and phone tell me it (when I look at info in phone about time to work-it show me 0h in standby 0h0m to call) after incomming call phone switch off (battery voltage was 3,5V) I tryed to switch it on again-phone looks to work ok (info in phone tell me that I have 0h stand by and 0h4m for call) After hour phone switch of and battery voltage was 3,25V - After this I can't switch on phone Any idea? thank U |
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