T28 signal dropping - GSM-Forum

Keke · 07-17-2002, 23:28

I have a t28 that was dead and I replace the PA and everything is working perfect but the signal comes full and drop so make it impossible to make a call. It is the second time I have this problem .
Can anyone help me please ???

ivvan · 07-21-2002, 10:45

Try to change the RF IC.It work well.

.::AkhavanGSM::. · 07-21-2002, 12:06

Good time.
why dont you change PA?
IN many cases it have responded me.
But make sure first and ask someone professional then change it.
I AM AMATURE.
GOOD LUCK LIGHT

Keke · 07-21-2002, 20:18

THanks IVVAN I have never try that , Iwill do it and let you know.

doubleB · 07-21-2002, 20:35

try 2 change PA again dis time check if its good.... I suggest u get a NEW 1.....check part ID of PA also it might help.... I also encountrd same prob b4.....

ALL GOOD,
BR3333

.::AkhavanGSM::. · 07-22-2002, 12:02

Good time.
and Hello dear bb33333
I have a Q:
What do u mean by "check part ID of PA ".
thanks alot /I will wait to understand
thanks LIGHT

.::AkhavanGSM::. · 07-23-2002, 19:53

Hi.
Also try to check external antenna.
good luck LIGHT

Jackmaxo · 07-28-2002, 02:50

Hi friends,
If the signal level is good it's that the PA is good, but the transmission it isn't. So you ca begin by rehotting the HF erea and BGA, but d'ont forget to be carfull, we desire only avoiding bad contact...).
After that mesure the output RF signal when sending, test antenna switch.
If it's not ok contact me by mail or ICQ

07-17-2002, 23:28	#1 (permalink)
Keke No Life Poster Join Date: Jun 2002 Location: CT SA Age: 52 Posts: 1,387 Member: 12733 Status: Offline Thanks Meter: 26	T28 signal dropping I have a t28 that was dead and I replace the PA and everything is working perfect but the signal comes full and drop so make it impossible to make a call. It is the second time I have this problem . Can anyone help me please ???

07-21-2002, 12:06	#3 (permalink)
.::AkhavanGSM::. No Life Poster Join Date: Jun 2002 Location: Iran Age: 47 Posts: 1,082 Member: 12724 Status: Offline Thanks Meter: 30	change ... Good time. why dont you change PA? IN many cases it have responded me. But make sure first and ask someone professional then change it. I AM AMATURE. GOOD LUCK LIGHT

07-22-2002, 12:02	#6 (permalink)
.::AkhavanGSM::. No Life Poster Join Date: Jun 2002 Location: Iran Age: 47 Posts: 1,082 Member: 12724 Status: Offline Thanks Meter: 30	what do u mean by ... Good time. and Hello dear bb33333 I have a Q: What do u mean by "check part ID of PA ". thanks alot /I will wait to understand thanks LIGHT

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07-21-2002, 10:45	#2 (permalink)
ivvan Junior Member Join Date: Jun 2002 Location: inside your mind Age: 45 Posts: 1 Member: 12755 Status: Offline Thanks Meter: 0	Try to change the RF IC.It work well.

07-21-2002, 20:18	#4 (permalink)
Keke No Life Poster Join Date: Jun 2002 Location: CT SA Age: 52 Posts: 1,387 Member: 12733 Status: Offline Thanks Meter: 26	THanks IVVAN I have never try that , Iwill do it and let you know.

07-21-2002, 20:35	#5 (permalink)
doubleB Freak Poster Join Date: Jun 2002 Location: Manila Age: 46 Posts: 191 Member: 13341 Status: Offline Thanks Meter: 0	try 2 change PA again dis time check if its good.... I suggest u get a NEW 1.....check part ID of PA also it might help.... I also encountrd same prob b4..... ALL GOOD, BR3333

07-23-2002, 19:53	#7 (permalink)
.::AkhavanGSM::. No Life Poster Join Date: Jun 2002 Location: Iran Age: 47 Posts: 1,082 Member: 12724 Status: Offline Thanks Meter: 30	Hi. Also try to check external antenna. good luck LIGHT

07-28-2002, 02:50	#8 (permalink)
Jackmaxo Freak Poster Join Date: Dec 2001 Location: Earth Posts: 238 Member: 7934 Status: Offline Thanks Meter: 0	Hi friends, If the signal level is good it's that the PA is good, but the transmission it isn't. So you ca begin by rehotting the HF erea and BGA, but d'ont forget to be carfull, we desire only avoiding bad contact...). After that mesure the output RF signal when sending, test antenna switch. If it's not ok contact me by mail or ICQ