c45 and mt50 - sound of PA in speaker - GSM-Forum

tomaszwl · 05-27-2005, 15:59

Hi to all.
I have two siemens phones - C45 and MT50 - both with the same failure - when PA is working, I can hear a sound of it in the speaker. Anyone knows what's the reason?
Regards,
Tomasz WL

GSMsurgeon · 05-27-2005, 16:14

Hi mate,
try to replace/remove 1 big capcitor in near pa...i repaired many..but some cases only

B.R

tomaszwl · 05-27-2005, 17:37

i tried it also - no work. I changed PA, antenna switch, antenna connector, two coils under middle shielding and also no work. Phone was "hard" dropped because mainboard is bent, but all except those "noise" is ok.
I have no other ideas what to do

massy · 05-31-2005, 01:31

one pin of antena must be at ground.if isn n ,you have noise in speaker

tested on a55,c55,c35,mc60,,,,,,,pana gd55...,moto c200..................

tomaszwl · 05-31-2005, 08:45

i repaired MT50 - the big capacitor was broken (even the changed one) but I put big capacitor from nokia 3210 and it works fine. C45 probably has broken PCB - nothing works on it (PCB is bent).
Regards,
Tom

05-27-2005, 15:59	#1 (permalink)
tomaszwl Freak Poster Join Date: May 2004 Age: 34 Posts: 133 Member: 64680 Status: Offline Thanks: 3 Thanked 14 Times in 9 Posts	c45 and mt50 - sound of PA in speaker Hi to all. I have two siemens phones - C45 and MT50 - both with the same failure - when PA is working, I can hear a sound of it in the speaker. Anyone knows what's the reason? Regards, Tomasz WL

05-27-2005, 16:14	#2 (permalink)
GSMsurgeon No Life Poster Join Date: Sep 2001 Location: United Kingdom Age: 38 Posts: 1,482 Member: 6524 Status: Offline Thanks: 39 Thanked 193 Times in 141 Posts	Try This Hi mate, try to replace/remove 1 big capcitor in near pa...i repaired many..but some cases only B.R

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05-27-2005, 17:37	#3 (permalink)
tomaszwl Freak Poster Join Date: May 2004 Age: 34 Posts: 133 Member: 64680 Status: Offline Thanks: 3 Thanked 14 Times in 9 Posts	i tried it also - no work. I changed PA, antenna switch, antenna connector, two coils under middle shielding and also no work. Phone was "hard" dropped because mainboard is bent, but all except those "noise" is ok. I have no other ideas what to do

05-31-2005, 01:31	#4 (permalink)
massy Freak Poster Join Date: May 2004 Age: 32 Posts: 385 Member: 66102 Status: Offline Thanks: 2 Thanked 13 Times in 10 Posts	one pin of antena must be at ground.if isn n ,you have noise in speaker tested on a55,c55,c35,mc60,,,,,,,pana gd55...,moto c200..................

05-31-2005, 08:45	#5 (permalink)
tomaszwl Freak Poster Join Date: May 2004 Age: 34 Posts: 133 Member: 64680 Status: Offline Thanks: 3 Thanked 14 Times in 9 Posts	i repaired MT50 - the big capacitor was broken (even the changed one) but I put big capacitor from nokia 3210 and it works fine. C45 probably has broken PCB - nothing works on it (PCB is bent). Regards, Tom