despredly need help with 7650.. - GSM-Forum

sergo_zmeia · 03-29-2005, 21:59

Hi all!
Here is the story:
phone came dead...spliped apart to the two parts...ribbon brocken...thats ok..i change it...power up ok...everything work ok...besides inner keyboard...only "0" "c" and "red" works...now Im wondering..if "0" works..than "8" "5" and "2" must work too..but out of luck...U will say..ribbon is bad soldered...no way...Im good enough in it...8 years pro in elektronics..I atleast know how to use soldering iron...and its not my first 7650...any one can supply me with schematic or a picture...ore any solution..
Thanks and regards!
sergo_zmeia

Yoda_Brno · 03-29-2005, 23:39

i think your problem is in Z300, Z301 EMI filter.. bad soldered or damaged.. have u parts layout?

Unggul · 03-30-2005, 00:22

Z 300, Z301 damage or ribbon in bad quality.

Regards

sergo_zmeia · 03-30-2005, 08:46

Thanks....any schematic or picture please.....to find these parts...
Thanks and regards!
sergo_zmeia

sergo_zmeia · 03-30-2005, 08:58

Ok..schematic founded...Ill see what I can do..than will post report...wish me luck...
Regards!
sergo_zmeia

sergo_zmeia · 04-01-2005, 14:59

Solved!
After changing all varistors on the key pad PCB everithing is good..
Thanks and regards!
sergo_zmeia

03-29-2005, 21:59	#1 (permalink)
sergo_zmeia Freak Poster Join Date: Jun 2003 Location: Bulgaria Age: 48 Posts: 471 Member: 32284 Status: Offline Thanks Meter: 4	despredly need help with 7650.. Hi all! Here is the story: phone came dead...spliped apart to the two parts...ribbon brocken...thats ok..i change it...power up ok...everything work ok...besides inner keyboard...only "0" "c" and "red" works...now Im wondering..if "0" works..than "8" "5" and "2" must work too..but out of luck...U will say..ribbon is bad soldered...no way...Im good enough in it...8 years pro in elektronics..I atleast know how to use soldering iron...and its not my first 7650...any one can supply me with schematic or a picture...ore any solution.. Thanks and regards! sergo_zmeia Last edited by sergo_zmeia; 03-30-2005 at 09:03.

03-30-2005, 08:46	#4 (permalink)
sergo_zmeia Freak Poster Join Date: Jun 2003 Location: Bulgaria Age: 48 Posts: 471 Member: 32284 Status: Offline Thanks Meter: 4	Hi! Thanks....any schematic or picture please.....to find these parts... Thanks and regards! sergo_zmeia

03-30-2005, 08:58	#5 (permalink)
sergo_zmeia Freak Poster Join Date: Jun 2003 Location: Bulgaria Age: 48 Posts: 471 Member: 32284 Status: Offline Thanks Meter: 4	Hi! Ok..schematic founded...Ill see what I can do..than will post report...wish me luck... Regards! sergo_zmeia

04-01-2005, 14:59	#6 (permalink)
sergo_zmeia Freak Poster Join Date: Jun 2003 Location: Bulgaria Age: 48 Posts: 471 Member: 32284 Status: Offline Thanks Meter: 4	Hi! Solved! After changing all varistors on the key pad PCB everithing is good.. Thanks and regards! sergo_zmeia

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03-29-2005, 23:39	#2 (permalink)
Yoda_Brno Freak Poster Join Date: Sep 2003 Location: Czech Rep. Age: 43 Posts: 348 Member: 40423 Status: Offline Thanks Meter: 5	i think your problem is in Z300, Z301 EMI filter.. bad soldered or damaged.. have u parts layout?

03-30-2005, 00:22	#3 (permalink)
Unggul No Life Poster Join Date: Jul 2004 Location: Bandung - West Java, Indonesia Age: 43 Posts: 501 Member: 71273 Status: Offline Thanks Meter: 14	Z 300, Z301 damage or ribbon in bad quality. Regards

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