i317 very weak signal and emergency calls only - GSM-Forum

HUM · 08-29-2015, 21:22

i317 very weak signal and only emergency calls

in open area show signal but not stable

someone already removed external antenna and make jumper

so i put jumper from antenna pin in charging port to external antenna on pcb but same

any good suggestion will be appreciated

Munir · 08-30-2015, 06:16

Quote:

Originally Posted by HUM

i317 very weak signal and only emergency calls

in open area show signal but not stable

someone already removed external antenna and make jumper

so i put jumper from antenna pin in charging port to external antenna on pcb but same

any good suggestion will be appreciated

Check in another charging flex and antenna cable.

HUM · 08-31-2015, 22:07

i change charging port and antenna wire but still same

actually external antenna already removed from pcb and one print of external antenna print which goes to pa damaged

anyone can share here complete signal ways ?

Munir · 09-01-2015, 05:39

Quote:

Originally Posted by HUM

i change charging port and antenna wire but still same

actually external antenna already removed from pcb and one print of external antenna print which goes to pa damaged

anyone can share here complete signal ways ?

upload photo both size

HUM · 09-01-2015, 23:10

chk the pictures

charging + antenna flex

backside of pcb

HUM · 09-01-2015, 23:12

front side of pcb

braken antenna point

Munir · 09-02-2015, 06:09

Quote:

Originally Posted by HUM

front side of pcb

braken antenna point

dear pls.. 1st clean pcb with pcb cleaner and than take photo.
I had seen it but due dark flux can't see proper track.

Munir · 09-02-2015, 12:10

1st jumpper 10cm. in air. If you get full network than connect to cable socket.
If get weak network than change FEM ic in 2nd step.

HUM · 09-02-2015, 14:43

fem is pa ic .......?

Munir · 09-03-2015, 05:58

Quote:

Originally Posted by HUM

fem is pa ic .......?

no fem ic is FRONT END MIXER module its separte rx tx of all verious band.

Munir · 09-03-2015, 06:00

Quote:

Originally Posted by Munir

dear pls.. 1st clean pcb with pcb cleaner and than take photo.
I had seen it but due dark flux can't see proper track.

1st jumpper 10cm. in air. If you get full network than connect to cable socket.
If get weak network than change FEM ic in 2nd step.

before same post forgot to post img.

HUM · 09-04-2015, 02:24

Quote:

Originally Posted by Munir

1st jumpper 10cm. in air. If you get full network than connect to cable socket.
If get weak network than change FEM ic in 2nd step.

before same post forgot to post img.

i put 10cm wire and sold one side and other leave in the air

than it show signal in room but not full, when i soldered to pin on charging flex than no signal or if signal than only emergency calls

Munir · 09-04-2015, 06:26

Quote:

Originally Posted by HUM

i put 10cm wire and sold one side and other leave in the air

than it show signal in room but not full, when i soldered to pin on charging flex than no signal or if signal than only emergency calls

change charging flex or trace line of signal path. Don't connect 10cm. wire to charging flex it will not give complete signal. use anttena cable in proper way to get full signal. My doubt is FEM ic. once change it.

HUM · 09-05-2015, 00:23

sir u have schematics and service manual of this model ?

HUM · 09-05-2015, 02:27

here are clear and zoomed pictures

pcb

flex

make jumper like this but not get good signal in open area signal fine but in room no signal or get 2-3 signal bars but not make call

missing parts

i chk on other pcb it is like a small coil

08-29-2015, 21:22	#1 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	i317 very weak signal and emergency calls only i317 very weak signal and only emergency calls in open area show signal but not stable someone already removed external antenna and make jumper so i put jumper from antenna pin in charging port to external antenna on pcb but same any good suggestion will be appreciated

08-31-2015, 22:07	#3 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	i change charging port and antenna wire but still same actually external antenna already removed from pcb and one print of external antenna print which goes to pa damaged anyone can share here complete signal ways ?

09-01-2015, 23:10	#5 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	chk the pictures charging + antenna flex backside of pcb

09-01-2015, 23:12	#6 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	front side of pcb braken antenna point

09-02-2015, 12:10	#8 (permalink)
Munir No Life Poster Join Date: Mar 2003 Location: INDIA Age: 57 Posts: 555 Member: 25662 Status: Offline Thanks Meter: 190	1st jumpper 10cm. in air. If you get full network than connect to cable socket. If get weak network than change FEM ic in 2nd step.

09-02-2015, 14:43	#9 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	fem is pa ic .......?

09-05-2015, 00:23	#14 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	sir u have schematics and service manual of this model ?

09-05-2015, 02:27	#15 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	here are clear and zoomed pictures pcb flex make jumper like this but not get good signal in open area signal fine but in room no signal or get 2-3 signal bars but not make call missing parts i chk on other pcb it is like a small coil