1100 still no signal????

[sallu]

a 1100 came with blinking white screen. erased it manual and then flashed it with both new and old version. very little signal(operator name only not signal bar) come and go. wrote pm. noway. then changed P.A. no way. then changed 3 signal filters. not at all signal. now when i switch on phone there is no signal. but when i manually reset factory setting by keypad, only operator name come on the screen with no signal bar.

if some one has idea plz help.??????
what measure shuold be next????

[Dave.W]

check baseband. reflow all but be carefull of the main IC's. do not heat too long or you cause dead set.

[afser]

Originally Posted by sallu

a 1100 came with blinking white screen. erased it manual and then flashed it with both new and old version. very little signal(operator name only not signal bar) come and go. wrote pm. noway. then changed P.A. no way. then changed 3 signal filters. not at all signal. now when i switch on phone there is no signal. but when i manually reset factory setting by keypad, only operator name come on the screen with no signal bar.

if some one has idea plz help.??????
what measure shuold be next????

You chake hager ice and replay

[sallu]

thanks for the quick response. but wt do u mean by baseband and how to check it??

[Dave.W]

base band is MCU/processor/flash memories and all other components linked there.

if you did search the forum before you go changing power amp/filters, you will find the trick to diagnose your fault.

when network appear then drop, or network name only: make manual search for network.

if all networks is find, then your problem is PA.

if no networks is find: then you have problem in base band.

[Dave.W]

but now, you have changed some components you make it more difficult.

you may have caused additional faults due to bad component or soldering or excess heat....

[sallu]

as u mentioned. i manually searched for network, after long time(about 1 min) found network but when try to register it says no access. I m afraid I m wrongly changing P.A. It looks made of plastic. when i tried to change it required bit higher heat (on pt 5). May be it damaged during change????
Is there anyother method to replace such plasitic looking P./As. or i m rightly replacing it???

[garibaldi1970]

antinna1100 bay samirsana.JPGIt tries to make these jumpers. I have resolved this way.

Originally Posted by sallu

a 1100 came with blinking white screen. erased it manual and then flashed it with both new and old version. very little signal(operator name only not signal bar) come and go. wrote pm. noway. then changed P.A. no way. then changed 3 signal filters. not at all signal. now when i switch on phone there is no signal. but when i manually reset factory setting by keypad, only operator name come on the screen with no signal bar.

if some one has idea plz help.??????
what measure shuold be next????

[sallu]

dear Mr. Garibaldi, before posting read previous thread posts.

[Dave.W]

i dont think you can jumper the power amp effectively, it is an amplifier not just a staraight through connection...

sallu, you can heat the plastic case IC's with heat 3 and air 3 with no damage (if you do not hold nozzle over for too long). please use plenty of flux over the IC to protect it some.

i find liquid flux is the best, as you can get it under the IC.

[Dave.W]

you can also try the other method, of heat the board from under side of IC. to protect it more.

but i find heat 3 air 3 works well in all case

[sallu]

thnx very much. i take air 1 or 2. may it be the cause of damage. ut with air 3, i think air flow will be may disturb near by components

[zipzap_kill]

write 2 kb pm in ur files it would work perfectly

[sallu]

yea, my pm file ws not right. after writing good pm solved this problem of both 1100 and 2300

conclusion i got when operator name is on screen but no signal that is most probably pm file problem.