Eric T20 T39 no aceess - GSM-Forum

GSMan · 10-09-2002, 15:39

I have problem with more units with no aceess after an hour.I solve the problem in most cases with rehot the rf area but after 4-5 days comes back with same problem.does anyone have find any solution??
W.B.R.

jero · 10-09-2002, 18:44

hi GSMan...

if you solve the problem for 4-5 days.so the pcb should be the reason.dont worry!if you sure that the pa and diplexer are o.k..
reball the uBGA chips...mostly solder balls of those chips are cold soldered or broken.this is why the problem doesnt show itself for a few days after you rehot the pcb...__jero__

10-09-2002, 15:39	#1 (permalink)
GSMan Freak Poster Join Date: Jul 2000 Location: GabiRo Posts: 272 Member: 1675 Status: Offline Thanks Meter: 44	Eric T20 T39 no aceess I have problem with more units with no aceess after an hour.I solve the problem in most cases with rehot the rf area but after 4-5 days comes back with same problem.does anyone have find any solution?? W.B.R.

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10-09-2002, 18:44	#2 (permalink)
jero Freak Poster Join Date: Aug 2002 Location: __inside__ Age: 41 Posts: 102 Member: 14792 Status: Offline Thanks Meter: 1	hi GSMan... if you solve the problem for 4-5 days.so the pcb should be the reason.dont worry!if you sure that the pa and diplexer are o.k.. reball the uBGA chips...mostly solder balls of those chips are cold soldered or broken.this is why the problem doesnt show itself for a few days after you rehot the pcb...__jero__