Blackberry 9700 & 9780 dead supply fault

[kripalu]

cal_guy sir i already changed 2 working pm ic but condition is same

when i give power through battery connector no consumtion of current it takes

please help me

[cal_guy]

Check these
- At C1025 check 2.85 v
- At C1004 check 1.8 v

Give power first from battery connector and check, then from usb. Also look for shorted caps near PMIC, PA and battery connector.

Hope this will help

[Munir]

Originally Posted by kripalu

cal_guy sir i already changed 2 working pm ic but condition is same

when i give power through battery connector no consumtion of current it takes

please help me

how much ohms you get at BAT_ID(next to positive) or there is link opne. If opne than do jumper to R1305 near cpu.Your case is very difficult it will not solve by any PMIC. Do one thing pls. check all four side capsitor's link with PMIC capsitor C1025 C1004 C1007.
And alos change 32K oscillator(X901).
its too difficult *** bless & inspire You. hope never DIE.
sorry for poor english.

[boxerchow]

Originally Posted by kripalu

cal_guy sir i already changed 2 working pm ic but condition is same

when i give power through battery connector no consumtion of current it takes

please help me

buddy , sometimes after rework (change ic / rehot / reball) blackberry device didn't gave right information when you check supply with powersupply or avometer . You need to give power by connecting to PC without / with battery and let the pc initialing . then after that you can unplug from PC and then you can CHECK again the voltage ...

[seal777]

Originally Posted by cal_guy

1- Connect charger without battery and see if you get red light??
2- Connect to PC and see if your computer detects it. (w/o battery)
3- Check short between vbat and gnd.
4- Check bat_id line to R1305 if missing put jumper or sherted to ground.

I hope this will help and post results here.

Hello,sorry I don`t see R1305,where is it?
Thanks!

[Munir]

Originally Posted by seal777

Hello,sorry I don`t see R1305,where is it?
Thanks!

dear bro work littel hard.

[Munir]

Originally Posted by boxerchow

buddy , sometimes after rework (change ic / rehot / reball) blackberry device didn't gave right information when you check supply with powersupply or avometer . You need to give power by connecting to PC without / with battery and let the pc initialing . then after that you can unplug from PC and then you can CHECK again the voltage ...

its doesnt have any meaning.
you can change PMIC there after check voltage and omhs reading without connecting pc. I am sure it will give you result base on your problem but I am sure that no need to connect PC or any type of initalasing.

[Munir]

Originally Posted by boxerchow

buddy , sometimes after rework (change ic / rehot / reball) blackberry device didn't gave right information when you check supply with powersupply or avometer . You need to give power by connecting to PC without / with battery and let the pc initialing . then after that you can unplug from PC and then you can CHECK again the voltage ...

its doesnt have any meaning.
you can change PMIC there after check voltage and omhs reading without connecting pc. I am sure it will give you result base on your problem but I am sure that no need to connect PC or any type of initialasing.

[kripalu]

i got today one 9700 in problem lcd white

when we put battery in phone it gets on with white lcd only but does not connect with pc

when we connect only pcb to computer it does not connect


and when we masure supply after inserting charger we not get propper supply on point next to positive which should be around more than 2.3 v

please help me

[cal_guy]

First change LCD with correct version. If you have done it already check voltages e.g., 1.8v and 2.85v

[akinboj3089]

please i have 3 9700 {1}white display, {2} network not full,not stable at all, {3} dead when i open bluetooth cover plate. please help with solution picture diagram thanks

[Miangee911]

Originally Posted by cal_guy

1- Connect charger without battery and see if you get red light??
2- Connect to PC and see if your computer detects it. (w/o battery)
3- Check short between vbat and gnd.
4- Check bat_id line to R1305 if missing put jumper or sherted to ground.

I hope this will help and post results here.

boss!my fone has same problem,i get red light if i insert charger without battery but fone is not detectec on computer even without battery or with battery.what can i do?please give me a hint.thanks

[Miangee911]

But my fone get 2.2v and 2.8v on the respective pins so it means my fone's power supply is fine.please any solution?it is not switching on and not charging.

[cal_guy]

Is it BB 9700? ?

[updown]

i have 3 pease 9780 with usb charge through laptop its bt-id 0.12 and next 2.2V on battery point 4.65V and on 2nd&3rd 9780 its bt-id 2.8 and next 2.2 battery point 0V

any idea