7650 shorting the battery - GSM-Forum

spectrum · 10-11-2003, 16:17

As soon as I put a battery in the phone and measure the voltage on the phone (with the battery still in the phone), the voltage reads zero!
What component(s) can cause this problem?
I was able to flash this phone with Griffin, obviously it is still dead.
Any help will be appreciated
Thanks

CellM@n · 10-12-2003, 20:06

try without lcd, is still short ??

spectrum · 10-13-2003, 12:27

Without lcd, it is still short
What next can I check?
Thx for your help

Medz · 10-13-2003, 19:27

Short on the main board or on the keypad board ?

paygee · 10-13-2003, 19:52

it is indication for short pa .

remove the resister just below the pa,it is in series to pa+v from battry and check or remove pa.

+volts from battery goes direct to pa.

Hanukkah · 10-29-2003, 17:55

Quote:

Originally posted by paygee
it is indication for short pa .

remove the resister just below the pa,it is in series to pa+v from battry and check or remove pa.

+volts from battery goes direct to pa.

You might be referring to the COIL that is between PA's supply and Battery B+. It is a coil and not a resistor.

paygee · 10-29-2003, 19:00

@Hanukkah

yeh

u r 100% wright.it is a rfc [radio frequency chock or coil] it looks like a resister ,so for the pplz not familiar with electronics or less experienced, i wrote it resister.

VELIKI · 10-31-2003, 08:41

also can be flatcable

Hanukkah · 11-01-2003, 00:40

@paygee

No problem m8, just wanted it straightened out. People should call the parts as they are so as not to confuse our mates here. Some might think you are referring to a "resistor" and not the coil.

spectrum · 11-01-2003, 10:58

You are right.
I was actually looking for a resistor.

Now to the real problem
Removed the coil, I still had the short.
I guess I have to replace the PA.
But where can I get a replacement?
Who sells them?
Thx

Raheeeeb · 11-01-2003, 12:08

1- coil of pa
2- black big risestor main feed line to pa
3- rippon flast cable
4- chrging regulator in key pad board

spectrum · 11-01-2003, 12:32

1- Do you mean I should change the coil? Will this coil cause this problem?
2- Will the big resistor also cause this problem?

I will try changing the flat ribbon cable
I have changed the keypad board same problem

As soon as I replace these, I will post results.
Thx

Hanukkah · 11-01-2003, 14:20

When you remove the coil and there is still short, this means your PA is not faulty as you have just isolated the PA from the board by removing the coil... You will have to look for the short somewhere else. Try removing the LCD module and check for shorts.. or UEM... or AEM

spectrum · 11-01-2003, 14:33

Of course you are right.
Short is somewhere
I still need to find it
Thx

10-11-2003, 16:17	#1 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	7650 shorting the battery As soon as I put a battery in the phone and measure the voltage on the phone (with the battery still in the phone), the voltage reads zero! What component(s) can cause this problem? I was able to flash this phone with Griffin, obviously it is still dead. Any help will be appreciated Thanks

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10-12-2003, 20:06	#2 (permalink)
CellM@n No Life Poster Join Date: Feb 2001 Location: Planet EARTH Age: 50 Posts: 1,209 Member: 3194 Status: Offline Thanks Meter: 41	try without lcd, is still short ??

10-13-2003, 12:27	#3 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	Without lcd, it is still short What next can I check? Thx for your help

10-13-2003, 19:27	#4 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	Short on the main board or on the keypad board ?

10-13-2003, 19:52	#5 (permalink)
paygee No Life Poster Join Date: May 2002 Location: asia Age: 53 Posts: 711 Member: 11742 Status: Offline Thanks Meter: 1	it is indication for short pa . remove the resister just below the pa,it is in series to pa+v from battry and check or remove pa. +volts from battery goes direct to pa.

10-29-2003, 19:00	#7 (permalink)
paygee No Life Poster Join Date: May 2002 Location: asia Age: 53 Posts: 711 Member: 11742 Status: Offline Thanks Meter: 1	@Hanukkah yeh u r 100% wright.it is a rfc [radio frequency chock or coil] it looks like a resister ,so for the pplz not familiar with electronics or less experienced, i wrote it resister.

10-31-2003, 08:41	#8 (permalink)
VELIKI No Life Poster Join Date: Nov 2002 Location: slovenia Age: 48 Posts: 589 Member: 18028 Status: Offline Thanks Meter: 20	also can be flatcable

11-01-2003, 00:40	#9 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	@paygee No problem m8, just wanted it straightened out. People should call the parts as they are so as not to confuse our mates here. Some might think you are referring to a "resistor" and not the coil.

11-01-2003, 10:58	#10 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	You are right. I was actually looking for a resistor. Now to the real problem Removed the coil, I still had the short. I guess I have to replace the PA. But where can I get a replacement? Who sells them? Thx

11-01-2003, 12:08	#11 (permalink)
Raheeeeb No Life Poster Join Date: Oct 2001 Location: -------- Age: 55 Posts: 1,009 Member: 7062 Status: Offline Thanks Meter: 126	1- coil of pa 2- black big risestor main feed line to pa 3- rippon flast cable 4- chrging regulator in key pad board

11-01-2003, 12:32	#12 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	1- Do you mean I should change the coil? Will this coil cause this problem? 2- Will the big resistor also cause this problem? I will try changing the flat ribbon cable I have changed the keypad board same problem As soon as I replace these, I will post results. Thx

11-01-2003, 14:20	#13 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	When you remove the coil and there is still short, this means your PA is not faulty as you have just isolated the PA from the board by removing the coil... You will have to look for the short somewhere else. Try removing the LCD module and check for shorts.. or UEM... or AEM

11-01-2003, 14:33	#14 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	Of course you are right. Short is somewhere I still need to find it Thx