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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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04-09-2006, 12:20 | #1 (permalink) |
Freak Poster Join Date: Oct 2003
Posts: 170
Member: 41523 Status: Offline Thanks Meter: 8 | k750 microphone the problem is that in talking other side hears me 5 sec yes,5 sec no,and looping cheked tx power-same,5sec sending ,5sec no even if somebody sends me massage i can receive it after 1 hour,when usually it takes 1-3 mins max did full flash-same any help please tnx |
The Following 2 Users Say Thank You to gena For This Useful Post: |
04-09-2006, 23:36 | #2 (permalink) |
Junior Member Join Date: Sep 2003 Age: 44
Posts: 33
Member: 38241 Status: Offline Thanks Meter: 7 | Hi! I have a K750 phone and no michrophone. Absolute not working the michrophone. I know the mic control BGA is bad. I search michrophone repair solution, to look like the K500 michrophone solution! THX! Bye: MikroBig |
04-10-2006, 00:04 | #3 (permalink) |
Freak Poster Join Date: Oct 2004 Location: GREECE Age: 53
Posts: 297
Member: 84724 Status: Offline Thanks Meter: 31 | HI me man used the Search http:///vbb/showpo...14&postcount=3 |
The Following User Says Thank You to tasos1971 For This Useful Post: |
04-10-2006, 07:28 | #4 (permalink) |
No Life Poster Join Date: Jul 2004 Location: 127.0.0.1 Age: 79
Posts: 7,553
Member: 545165 Status: Offline Thanks Meter: 578 | ok now mic on k750i is not a normal mic as in tasos1971 sheme, it is actually patr and parcell of the pcb and cannot be removed or replaced, so dont go down that road thinking you can replace, @gena & @microbig on the bottom of phone next to charge block there is a very small hole in housing , make sure this is not obstructed with dirt |
04-10-2006, 08:53 | #5 (permalink) | |
No Life Poster Join Date: Apr 2003 Location: Greece Age: 47
Posts: 3,358
Member: 26279 Status: Offline Thanks Meter: 274 | Quote:
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04-10-2006, 10:23 | #6 (permalink) |
Freak Poster Join Date: Apr 2002 Location: Zgr Age: 48
Posts: 221
Member: 11112 Status: Offline Thanks Meter: 11 | the mic is glued strongly to z pcb ,so removing it not a simple thing ,add to that schem isn't clear enough so m8's if u want to help put clear advice 'n pic br |
04-10-2006, 11:19 | #7 (permalink) |
No Life Poster Join Date: Apr 2003 Location: Greece Age: 47
Posts: 3,358
Member: 26279 Status: Offline Thanks Meter: 274 | mic is not glued,but soldered with leed free solder wire(400-450 oC).actualy you need infrared station to do that job,but if you have enouhg experience then you can take out mic using hot air,without burn it. picture is clear enough,just you have to put mic to the hol |
05-18-2006, 13:46 | #10 (permalink) |
No Life Poster Join Date: Oct 2002 Location: Shenzhen China Age: 68
Posts: 1,074
Member: 16350 Status: Offline Sonork: 110823 Thanks Meter: 42 | I manage to take off corectly the Mic in perfect condition and i compare the values with new one. I got the same values but no sound coming from the mic. So i think that something else is wrong.. Does someone have PCB schematics?? BR |
05-23-2006, 17:08 | #11 (permalink) | |
Freak Poster Join Date: Feb 2004 Age: 45
Posts: 367
Member: 53907 Status: Offline Thanks Meter: 34 | Quote:
where can i get that 1.2k ic? thanks | |
06-02-2006, 10:30 | #12 (permalink) |
Freak Poster Join Date: Mar 2001 Location: Czech Republic
Posts: 295
Member: 3714 Status: Offline Thanks Meter: 6 | Thanx man, solution works... i put inside k750 mic from T610 & resistor from old 3210 pcb (r603...1.0K) and it works...... Platy |
The Following User Says Thank You to platy For This Useful Post: |
06-02-2006, 10:49 | #13 (permalink) |
No Life Poster Join Date: Aug 2002 Location: india Age: 63
Posts: 1,476
Member: 14578 Status: Offline Thanks Meter: 831 | Hi All, Pls, Anyone Can Post Here Good Photo Both Side. I Want To Find Any Solution, How To Desolser Mic Without Infrared Station And Without Damadge Pwb. Thanks. Wbr |
06-05-2006, 13:10 | #14 (permalink) |
Freak Poster Join Date: Mar 2006 Location: Winnipeg Canada
Posts: 273
Member: 244492 Status: Offline Thanks Meter: 8 | i like to bring this forward. i've a k700i contacted with liquid after servicing is still not working,i later flashed the fone with cruiser still i cannot here and the same time not charging i change the earpiece it work 4 a while and stop but the earpiece is ok. now you cannot ear anything except you use handsfree and is not charging all this are not software. could i have a solution to this. thnks. |
06-05-2006, 16:44 | #15 (permalink) |
No Life Poster Join Date: Oct 2002 Location: Shenzhen China Age: 68
Posts: 1,074
Member: 16350 Status: Offline Sonork: 110823 Thanks Meter: 42 | I found one problem. Check if one of the mic pad is shorted to the ground then the problem is not the mic but is the EMI Filter near the power supply it is responsable of the bottom mic. The other pad goes under the power supply. This motherboard (SE) are very difficult to work, as i needed to use rework station and solder iron to take off the cristal IC....} This time i was lucky as i have one dead k750 phone and i took the cristal from it. Does anyone have idea how to make wires on this IC as i feel like this is gonna be very frequent problem.... BR |
The Following User Says Thank You to opo For This Useful Post: |
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