6680on/off - GSM-Forum

jobykjoseph · 02-04-2006, 13:31

i cant findout the on/off switchs track of a 6680. phone does not power on but indicates charging.pls help by giving diagram.phone is water damaged.

naughtycell · 02-05-2006, 13:08

This is the 6680 power-Sw schematics/layout , check z4401 also , cause I think it may be involved in water effects .

jobykjoseph · 02-10-2006, 05:37

thank you sir,thanks a lot.

Tanvir · 02-18-2006, 21:29

@naughtycell

Nice work bro .... but we repaired this ON/OFF track problem long time ago by making jumper on small silver IC at the upper side of keyboard connector

Nice solution really ...

Regards,
Tanvir !

TRABEL · 02-18-2006, 22:55

Quote:

Originally Posted by Tanvir

@naughtycell
Nice work bro .... but we repaired this ON/OFF track problem long time ago by making jumper on small silver IC at the upper side of keyboard connector

Nice solution really ...
Regards,
Tanvir !

can you please show solution ? got 6680 water damage right on power switch , all circute with ic was damaged .
phone show charging and power on with jaf , np reading or flashing.

thx

Tanvir · 02-19-2006, 00:01

check the above pics gaved by @naughtycell...

In 6680 on/off switch track goes on the small glass ic which is on the upper side of Keyboard connector, it's called : Z4401

Regards,
Tanvir !

TRABEL · 02-19-2006, 00:41

Quote:

Originally Posted by Tanvir

check the above pics gaved by @naughtycell...
In 6680 on/off switch track goes on the small glass ic which is on the upper side of Keyboard connector, it's called : Z4401

Regards,
Tanvir !

so you say just remove the glass ic and jumper
IN1--->OUT1
IN2--->OUT2

TRABEL · 02-19-2006, 12:02

anyone know value of this resistor ?
and if its any metter to power on ?

bestman · 02-19-2006, 13:15

please, remember to check other componments on phnoe before any thing else.
i wish you the best .
please, i want to hear from you again.
bestman

TRABEL · 02-19-2006, 18:14

is this resistor can cuz power on not working ?
anyone know value ?

TRABEL · 02-21-2006, 16:04

ppl .................. HELP ... !!!!!!!!!

Dave.W · 02-22-2006, 11:14

that is a voltage dependant resistor (varistor).

i think it is not important, from looking at the opertaion

TRABEL · 02-22-2006, 19:44

Quote:

Originally Posted by Dave.W

that is a voltage dependant resistor (varistor).
i think it is not important, from looking at the opertaion

i see... i'll try that bridge ... hope it'll help ....

Dave.W · 02-23-2006, 10:54

no, please do not bridge! or phone will be not work properly!

if you bridge this component then phone will automatically power itself on when battery inserted

best to leave it out.

the operation is:

current is flow from voltage source "pwron".

if voltage there is small (nominal), R4460 resistor is high value. therefore voltage is apply at PWRONX pin of RETU (Via ESD filter). in this state, phone is OFF.

when switch is depressed, current will take the easy path through it to ground. now PWRONX pin of RETU is LOW and phone will power on.

R4460 (voltage dependant resistor) is used to protect ESD filter from large voltage spikes.

so please, just leave that component out if yo cannot find a suitable replacement.

abdullatheef · 03-06-2006, 17:30

dear
very good and very usefull
thanks

02-04-2006, 13:31	#1 (permalink)
jobykjoseph Insane Poster Join Date: Aug 2004 Age: 49 Posts: 94 Member: 77549 Status: Offline Sonork: 100.89357 Thanks Meter: 11	6680on/off i cant findout the on/off switchs track of a 6680. phone does not power on but indicates charging.pls help by giving diagram.phone is water damaged.

02-10-2006, 05:37	#3 (permalink)
jobykjoseph Insane Poster Join Date: Aug 2004 Age: 49 Posts: 94 Member: 77549 Status: Offline Sonork: 100.89357 Thanks Meter: 11	thanks thank you sir,thanks a lot.

02-18-2006, 21:29	#4 (permalink)
Tanvir No Life Poster Join Date: Feb 2003 Location: India Age: 39 Posts: 918 Member: 20691 Status: Offline Thanks Meter: 20	@naughtycell Nice work bro .... but we repaired this ON/OFF track problem long time ago by making jumper on small silver IC at the upper side of keyboard connector Nice solution really ... Regards, Tanvir !

02-19-2006, 00:01	#6 (permalink)
Tanvir No Life Poster Join Date: Feb 2003 Location: India Age: 39 Posts: 918 Member: 20691 Status: Offline Thanks Meter: 20	check the above pics gaved by @naughtycell... In 6680 on/off switch track goes on the small glass ic which is on the upper side of Keyboard connector, it's called : Z4401 Regards, Tanvir !

02-19-2006, 13:15	#9 (permalink)
bestman No Life Poster Join Date: Apr 2004 Age: 49 Posts: 1,271 Member: 61294 Status: Offline Thanks Meter: 49	please, remember to check other componments on phnoe before any thing else. i wish you the best . please, i want to hear from you again. bestman

02-19-2006, 18:14	#10 (permalink)
TRABEL No Life Poster Join Date: Feb 2003 Location: on the Moon ;) Age: 47 Posts: 2,797 Member: 21937 Status: Offline Thanks Meter: 279	is this resistor can cuz power on not working ? anyone know value ?

02-21-2006, 16:04	#11 (permalink)
TRABEL No Life Poster Join Date: Feb 2003 Location: on the Moon ;) Age: 47 Posts: 2,797 Member: 21937 Status: Offline Thanks Meter: 279	ppl .................. HELP ... !!!!!!!!!

02-22-2006, 11:14	#12 (permalink)
Dave.W No Life Poster Join Date: Nov 2001 Location: England Age: 41 Posts: 2,821 Member: 7653 Status: Offline Thanks Meter: 823	that is a voltage dependant resistor (varistor). i think it is not important, from looking at the opertaion

02-23-2006, 10:54	#14 (permalink)
Dave.W No Life Poster Join Date: Nov 2001 Location: England Age: 41 Posts: 2,821 Member: 7653 Status: Offline Thanks Meter: 823	no, please do not bridge! or phone will be not work properly! if you bridge this component then phone will automatically power itself on when battery inserted best to leave it out. the operation is: current is flow from voltage source "pwron". if voltage there is small (nominal), R4460 resistor is high value. therefore voltage is apply at PWRONX pin of RETU (Via ESD filter). in this state, phone is OFF. when switch is depressed, current will take the easy path through it to ground. now PWRONX pin of RETU is LOW and phone will power on. R4460 (voltage dependant resistor) is used to protect ESD filter from large voltage spikes. so please, just leave that component out if yo cannot find a suitable replacement.

03-06-2006, 17:30	#15 (permalink)
abdullatheef Freak Poster Join Date: May 2005 Age: 49 Posts: 138 Member: 148029 Status: Offline Thanks Meter: 9	dear very good and very usefull thanks