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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 02-03-2005, 06:31   #1 (permalink)
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C350 Speaker and MIC not working


Hi,
C350 Speaker and mic not working, but speaker and mic is good, tried with new one, but same problem, i changed the connector also.
need C350 Service Manual.
Pls Help Me.

Regards,
Paavalan B.
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Old 02-09-2005, 08:57   #2 (permalink)
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Hi

Hello,if you-ve got manual for C350 pls send to me,i have the same problem,thanks man.
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Old 02-09-2005, 09:35   #3 (permalink)
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Replace (or just remove) hands - free jack.
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Old 02-10-2005, 09:38   #4 (permalink)
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Not working man,other ideea?
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Old 02-10-2005, 11:06   #5 (permalink)
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Quote:
Originally Posted by paul turcu
Not working man,other ideea?
Rehot IC U900. Check U902 for speaker.
Attached Files
File Type: rar BL_C350_A3_BW_L3_1.0.rar (174.0 KB, 1724 views)
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Old 02-10-2005, 16:54   #6 (permalink)
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Quote:
Originally Posted by paul turcu
Not working man,other ideea?
1. Check Zenner diode VR904.
2. If measure short circuit to ground on R912 and R920, HEAD_INT signal is alwais low (active) and processor switchs off microphone and speaker.
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Old 03-19-2005, 16:19   #7 (permalink)
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hi

look this picture
conect pins U902 at the picture and fix your problem

BR
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File Type: jpg C350_speaker.JPG (87.2 KB, 1062 views)
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Old 07-24-2005, 13:07   #8 (permalink)
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need help please

hello ive got a c350 and got problems with the mic not working please can you tell me the method for conecting pins U902 or how to remove the handsfree jack ? many many thx
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Old 07-26-2005, 14:16   #9 (permalink)
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hello please as anybody got any info on this please many many thx
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Old 07-26-2005, 14:36   #10 (permalink)
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remove the hands free jack and link the connection point's directly and u'll get it working fine tested 10000000000000000%
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Old 08-08-2005, 11:42   #11 (permalink)
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Quote:
Originally Posted by soufiz
remove the hands free jack and link the connection point's directly and u'll get it working fine tested 10000000000000000%
Can you tell me how exactly to connect them please. Thanx in advance
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Old 08-08-2005, 13:06   #12 (permalink)
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c350 speaker pad torned out .........any solution
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Old 08-18-2005, 09:05   #13 (permalink)
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reflow the ic and all ok
br
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