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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Motorola > Motorola Hardware Repair

Motorola Hardware Repair here all threads Related to Motorola Hardware Servicing and Repairing.

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Old 04-25-2007, 03:38   #796 (permalink)
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Quote:
Originally Posted by indudhar View Post
Motorola Charging Problem
What moto?????????????????????
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Old 04-25-2007, 04:44   #797 (permalink)
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motorola white screen solution is
1 first of all check keypad ribben connector which one join to the board
2 secound check the the upper side connector of ribben join to the lcd
3 third check lcd jack on lcd
4 fourth check display ic on lcd near to the jack on lcd should be glass ic
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Old 04-25-2007, 16:34   #798 (permalink)
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Thumbs down sir help 4 L7 insert sim

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Originally Posted by sevgigsm View Post
v3 mic ways-----------------------------------------
sir help 4 L7 insert sim
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Old 04-27-2007, 09:43   #799 (permalink)
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c2oo not pway pls help
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Old 04-28-2007, 10:05   #800 (permalink)
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v3 bluetooth light always on please give me solution
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Old 04-29-2007, 02:27   #801 (permalink)
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Originally Posted by chinagorom207 View Post
c2oo not pway pls help
Remplace the cristal oscilator 26 MHZ
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Old 04-29-2007, 02:29   #802 (permalink)
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Originally Posted by patelsd82 View Post
v3 bluetooth light always on please give me solution
Clean the board , remplace the metalic boton in the membrane , use a tester to find any short .
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Old 04-30-2007, 14:04   #803 (permalink)
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hi friends

plz help v180 speaker way

zahid
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Old 04-30-2007, 21:11   #804 (permalink)
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L6 not charging you have solution please )
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Old 05-01-2007, 11:53   #805 (permalink)
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thanks a lot mannnnnnnnnn
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Old 05-01-2007, 15:16   #806 (permalink)
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L6 (L7, V3?) mic ways ? schematic here

I have an L6 I am guessing that the mic is the same in L7 & V3's. The phone was water damaged obviously water has got into the little whole and jammed up the graphite or something; it still works but barely. It looks like 3 layers of fiberglass. Like Kaami said keep the heat low.

I just want to confirm this removal method before doing it as it might wreck a working 70% mic. The mic looks like more than just a microphone ie. power into it therefore it must have an amplifier in it or some active filter.

Is there a way to fixing this mic? I tried air jet but no affect.


Quote:
Originally Posted by kaami View Post
needs another v3 mic anything else doesnt work.carefull when removing heat and ir on low
Attached Images
File Type: jpg L6_MIC_1.JPG (26.3 KB, 822 views)
File Type: jpg L6_MIC.JPG (28.4 KB, 763 views)
File Type: jpg L6_MIC_diag.JPG (28.5 KB, 910 views)
File Type: jpg L6_MIC_sch.JPG (35.7 KB, 875 views)

Last edited by panlem; 05-02-2007 at 02:06.
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Old 05-01-2007, 16:28   #807 (permalink)
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L6 charge way, my fix

I don't guarantee that it will work for all charging problem but I fixed one that was not charging.
Symptom: No power up, power plugged in it says charging but finishes quickly, battery read only 1.6v. Universal charge detects no power.

Solution: Well I did not have a spare battery to swap with. Because the phone came alive charging when plugged in, suggests something to do with the battery. The phone was water damaged, I peeled off the battery plastic cover, the battery cell actually was fully charged after all the attempts and left overnight. The problem was caused by corrosion in the circuitry inside the battery. Clean it up, the voltage measured 4.06v, great! plug it in to phone and all is swell.

For people with invalid battery, try another battery 1st if it works then most likely your battery circuitry is shorting. A working battery measure 10kohms between -ve (pin4) and pin 3 (THERM) next to it; check that too.

Anyway check the circuit below, on L6 block diagram there is VR324 that goes to OWB (One Wire Bus), R910, R911 for current limiting look at the green charge color path. The battery is labeled 3.7v and charger is 5v; the zener is 6.93v just as an overvoltage protection.

Possible solution for other no charge & invalid battery, without the battery:
1) Check VR324 & VR325 not short by measuing Pin 4 to 1 & 2
2) Pin4 to Pin3 of battery = 10Kohms
3) Meassure at Pin 1 > +4v with USB charge & battery (need fly wire to battery) in if not check open R910 & R911, if they are OK
4) Check Q905 % Q906 FET at S & D if voltage is gating


Quote:
Originally Posted by tellissi20 View Post
L6 not charging you have solution please )
Attached Images
File Type: jpg L6_BATT_block.JPG (70.0 KB, 1178 views)
File Type: jpg L6_BATT_sch.JPG (22.5 KB, 904 views)

Last edited by panlem; 05-03-2007 at 00:37.
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Old 05-03-2007, 07:06   #808 (permalink)
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can you give me solution for u6 no lights on display..............
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Old 05-03-2007, 11:10   #809 (permalink)
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Thumbs up Moto-v3 mic way solution

Hi I am Raaz, Pli...replase your(Crystal mic). Mind it, it is so defekal........................Bey [email protected] cell:+880181-9896597.
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Old 05-04-2007, 14:27   #810 (permalink)
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Unhappy c115 mic not working

sir i have c115 mic not working i change the mic but the problem still on now wat i do next pls give me guidence its very ungent pls help .thanx in advance.
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