Question about Motorola Mobility V710

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L7 unable to charge

I voltage in battery connector 1 pin =.67 ,2nd= 2.56,3rd=2.56,4th= gnd

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All cellphone run on Lithium Ion batteries. These batteries, by nature(physics) have a max charged voltage of 3.4 to 4VDC. So, of your charger, or USB cable, has less than about 5 VDC, then either charger is defective, USB cable(if charging from PC USB port) is not a FULL USB(has data leads only wire, 5V power wire not carried through, PC does not supply 5V power to USB because it is turned off by a PC setting option, or a non-powering USB Hub or other device is in series with PC and Phone.

Are you sure you have identified the GND wire correctly? Measurements must all be made with one lead of your VoltMeter referenced to GND. Another consideration, some Windows Mobile phones will not charge off the USB cable unless the latest version of WM ActiveSync or Mobile Device software is loaded and running on the PC. These WM phones also will not charge from just any AC USB generic charger. Charger has to be for that particular phone, or phone manufacture, to be 'recognized' before provideing charge.

The

Posted on Feb 22, 2009

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2 Answers

Can not charge


To locate the problem, it's important you own a multimeter, which can read DC Voltage and resistance.

If you do own one, then you can perform the following :

1. Battery
Set your multimeter in Voltage (DC)-mode.
Remove the battery from your phone and see what Voltage it's rated. (might be something like 3.7V, 4.2V or even higher.

The phone contains a minimum of 2 (small) pins, which is touching the battery, when it was inserted. The battery will have 2 or move gold-alike pads.Try to measure the battery at these pads to see the Voltage. If there are more pins, don't worry, just try to measure between all pins.
If the readout at your multimeter is roughly 0.5 Volts below the rated Voltage, the battery should be replaced.


Example :
Battery rated 3.7 V. Readout multimeter : 3.2 V
Battery should be replaced.

2. Adapter / charger
Insert the adapter in a wall-outlet (110 / 240 V AC)
The adapter, contains a plug, which inserts into your mobile phone. At this plug, you need the Voltage. The readout at your multimeter should be a higher than the Voltage-rating at he battery. If not, your adapter / charger is damaged.

3. Onboard connection
Set your multimeter in Resistance-mode, sometimes also shown as the Ohm-sign.
When charging your phone, your adapter is connected to your phone, redirected to the battery. Now it's time to check if there's a good connection between the phone-inlet and the battery-pins inside your phone. The inlet has in the center a metal pin. Try to connect your multimeter to this pin, and one of the battery-pins inside your phone. If there's no connection, to any of these pins, you'll get no readout. This might mean, the phone-inletconnector is not well connected to the board(*) of your phone.
(*) The green print, with all tiny electronic components.

The source of this damage might be :

A) While charging, the phone dropped on the floor.

B) Non-official adapter / charger
Maybe a higher rated current than allowed. A battery may be charged 1 / 10th of the specificated current. So, if the battery shows 1600 mAh, the batttery can be safely charged at a current of 160 mAh. If you use a 2A (= 2000 mA) charger, you can charge the battery, but results in a shorter lifetime of the battery.
Sometimes, even polarity might be an issue (reversed) or the non-official charger is supplying AC-Voltage instead of DC-Voltage.

C) Damaged onboard controller
Some phones contain a kind of controller-IC to control the charging proces. If the charger was supplying a too high Voltage or current (Ampere), it might end up in a fried controller-IC.
I such case you might have heard a "plop" when inserting this charger into your phone, or noticed smoke or a distinctive smell (of burned components)

Any repair for type A, B or C-damage, requires special skills and tools. If you lack any of these 2, go for a repair-shop or buy a new mobile phone.

Oct 13, 2013 | LG Cell Phones

1 Answer

The battery on my 5230 wont charge up even tho its on the charger overnight ,ive charged it externally ,that is connecting the pos and neg from the charge lead diectly to the battery pos and neg this way...


just use a ziner diod neg leg of ziner sold to positive of charging connector and positive of ziner to battery connector plus ur problem will be solved

u can find ziner diod in old mobile like 1100 , 3300, 3310, 6600 etc.

Jun 06, 2011 | Nokia 5230 Cell Phone

1 Answer

Phone will not charge


The phone base uses the terminals in the charger to tell you that it is "charging". It does not sense power.
One of the following is probably true:
1. Cord is not good (check for voltage at charger terminals
2. Connector terminals are compressed from improper connectin - inspect and correct with straight pin (pull all the terminal elements to an equal level
3. Diode in the phone has popped and the battery chargering circuit cannot feed the battery correctly.
4. Battery is bad (shorted, dead).
Best to borrow someone elses and see if it will charge on your charger.

Nov 26, 2009 | Sony Ericsson w580i Cellular Phone

1 Answer

Unable to charge


motherboard is weekplz go to the motorola service centre

May 12, 2009 | Motorola Mobility SLVR L7 Cellular Phone

2 Answers

Not charging shows invalid battery


took your motorola l7 battery out clean the battery connector or put air pressure by your mouth and before all that change your charger

Apr 14, 2009 | Motorola Mobility SLVR L7 Cellular Phone

1 Answer

My motorola slvr L7 turns off and on automatically


bad battery over or under charged. never talk or web browes when chargeing only downloading is supported for the power chipset. if this persist then you need a genuine MOTOROLA CHARGER!!!! 6pin

Mar 12, 2009 | Motorola Mobility SLVR L7 Cellular Phone

1 Answer

Phone


You charging Port need to be service or replaced, so take the phone to a mobile service center to have it fix.

Aug 28, 2008 | Motorola Mobility SLVR L7 Cellular Phone

1 Answer

Unable to charge


Same problem here but phone is 14 mo old. Just stopped charging even though it says it is. Got new battery, same thing. Charged battery in different phone and was fine. swapped and it works. so... phone is bad somehow.

Apr 30, 2008 | Motorola Mobility SLVR L7 Cellular Phone

2 Answers

Motorla Slvr L7 Won't hold charge


It depends on how much talking your doing. The Slvr is known for its low talk-time battery power. My slvr would last about 3 to 4 days on a charge, unless i was talking on it a lot. sometimes i would be charging it every other day. So it really all depends on the talk-time. Invest in a car charger for sure.

Dec 24, 2007 | Motorola Mobility SLVR L7 Cellular Phone

5 Answers

Wont charge!


1. The charger may be damaged To check if the charger is damaged, use another functioning charger. The charger cable has a tiny wire that easily breaks when used without proper care. If the phone still does not charge with a functioning charger, try next step. 2. The battery may be damaged Change the battery and try charging again. If the phone still does not charge with a functioning battery, try next step. 3. The battery terminals may not connect properly with the battery connectors Check the battery connector to see if the battery and the connector connects well. The phone will indicate charging only when there?s enough power supply from the battery. click here Solution Procedure: If problem is confirmed, adjust the battery connector using tweezers to reach the battery terminal and establish connection. Or try next step. 4. The charging pin may be damaged or does not connect well with the board's interface Check the charging pins to see if they are well connected to the mother board. Sometimes the charging pins wear out or loosens from its connection with the mother board. Solution Procedure: Check if the pin is bent. Straighten the pin using tweezers. Make sure the board interface is also clean otherwise, you will need to clean it by rubbing its surface using an eraser or brushing it with a board solution. Or replace with a new charging pin. Make sure the charging pin touches with the board interface to establish connection. The CCONT IC for DCT3 or UEM for DCT4 or the "K" resister for non-Nokia models may be damaged If the phone still does not charge after adjustments are made, the problem is CCONT IC for DCT3 or UEM for DCT4 or ?K? resister for non-Nokia models.

Aug 19, 2007 | Nokia 6300 Cellular Phone

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