View Full Version : C35 and M35 prob's
Have few problem's with these phones :<br />one show's charging without charger and few phones completly no network ... (seem's rx isn't working at all) .<br />Any hint's ?<br />Regard's<br />Saulius
hello m8
for non receiving problem ( no signal ), change the rx filter below the antenna switch deplexer .<br />for non recieving problem ( there is signal with no recieving calls ) change the pa .<br />for non charging i have`t much experience in it but try to see the components near the charging ic .
kind regards <img src="wink.gif" border="0">
Hello<br />Mostly your problem is caused by the MCU , you can try to change then see what will happend <img src="smile.gif" border="0"> hehe
yes, these phones have problems with MCU's. It's BGA chips with many many legs beneath. A lot of problems, including no network is caused with dry solder or faulty CPU's. Sinse changing of these BGA's is very very hard, I can advise only to rehot them with good flux. BUt don't use high temperature for them, they can be destroyed easily. Good luck.
Pardon, I mean CPU <img src="smile.gif" border="0"> not MCU <img src="smile.gif" border="0">
Hello<br />Yes,CPU is what I mean for MCU <img src="smile.gif" border="0"> the right tempeature is about 280-310 but do it careful <img src="smile.gif" border="0"> <br />I just burned 1 for first time solder this mcu. good luck!
genocite
11-24-2001, 20:10
if you experiencing both auto charging and no service (no signal) in a same phone, it was caused by the bad PMB 2906 BGA, just replace that and it will solved your problem<br />if the phone just charging by itself, check the pinout legs, sometimes you have to desolder it, clean it and put it back, if that's still happen, check the charging diode (1 FM) located near the dialogue ic, a broken diode may cause the phone auto charging.<br />no service (no signal) can also caused by a bad D518A, Y36, LMX2979, EPCOS 4846, D5124 and many other part
genocite solution is right...i used it meny times...it helps <img src="smile.gif" border="0"> )