iphone 6 plus no touch - GSM-Forum

jojojiji · 03-08-2016, 04:08

Hi guys,
I have an iPhone 6 plus with no touch problem. I changed both touch IC's but still no touch. I checked connectors and they are fine. I tried a new display and same problem, no touch and some horizontal lines. What can I check? Thank you.

jimchu316 · 03-10-2016, 20:58

logic board pcd fracture

check all touch socket pins resistance.

if fine, check CPU

jojojiji · 03-11-2016, 01:32

Quote:

Originally Posted by jimchu316

logic board pcd fracture

check all touch socket pins resistance.

if fine, check CPU

I checked the touch pins, some of them that should be grounded are not, and some that shouldn't be ground are. Anyone have iphone 6 plus .pcb file that can share? I have one but it does not 100% match the components.

tochits · 03-12-2016, 01:38

just try again to change the line touch controller IC...
sometimes IC is defective.got experience change 3x no luck.
but on the 4th time success.

jojojiji · 03-12-2016, 21:09

Guys, I think I found the cause of the touch problem, PP_SAGE_TO_TOUCH_VCPH_CONN pin 36 of the touch connector is grounded, this is a power line and should not be grounded, I checked on zxw tool but I can't find the cause of the short. Any one has experience with this problem? Thank you.

Raj mobe care · 03-12-2016, 21:55

Quote:

Originally Posted by jojojiji

Guys, I think I found the cause of the touch problem, PP_SAGE_TO_TOUCH_VCPH_CONN pin 36 of the touch connector is grounded, this is a power line and should not be grounded, I checked on zxw tool but I can't find the cause of the short. Any one has experience with this problem? Thank you.

Alleays post your problem with bord zoom clear pic
... Chek all cap on conecter may be short anyone
Many time i solved this problem
Chek bord with microscop clearly

jojojiji · 03-12-2016, 21:55

Here is an image that shows PP_SAGE_TO_TOUCH_VCPH_CONN grounded on the connector, but not grounded on the resistor

jojojiji · 03-12-2016, 21:58

Quote:

Originally Posted by Raj mobe care

Alleays post your problem with bord zoom clear pic
... Chek all cap on conecter may be short anyone
Many time i solved this problem
Chek bord with microscop clearly

Thank you for your reply, I posted the zwx tool showing the problem, also here is the board view as you requested

Raj mobe care · 03-12-2016, 22:01

Quote:

Originally Posted by jojojiji

Here is an image that shows PP_SAGE_TO_TOUCH_VCPH_CONN grounded on the connector, but not grounded on the resistor

Chek in zxw
R24.. Where going ways ... Simply find sorting ...if conected any cap with
R24.. Thenk chek for short ...

jojojiji · 03-12-2016, 22:11

Quote:

Originally Posted by Raj mobe care

Chek in zxw
R24.. Where going ways ... Simply find sorting ...if conected any cap with
R24.. Thenk chek for short ...

I already checked in zxw for r2412 but it does not show any other connections. only the one is red that I posted in the picture...

jimchu316 · 03-13-2016, 21:22

r2412 to pin 45 of j2401 , j2401 right side top No#5 pin,

PP_SAGE_TO_TOUCH_VCPH_CONN is pin 36, j2401 right side bottom No#10 pin, No# 6 pin.

jimchu316 · 03-13-2016, 21:32

jojojiji · 03-13-2016, 21:55

Quote:

Originally Posted by jimchu316

r2412 to pin 45 of j2401 , j2401 right side top No#5 pin,

PP_SAGE_TO_TOUCH_VCPH_CONN is pin 36, j2401 right side bottom No#10 pin, No# 6 pin.

Thank you for you help! my iphone6 5.5.pcb file is not the same as yours, can you please share with me your iPhone 6 5.5.pcb file?

mimbor · 03-14-2016, 10:23

Quote:

Originally Posted by jojojiji

Hi guys,
I have an iPhone 6 plus with no touch problem. I changed both touch IC's but still no touch. I checked connectors and they are fine. I tried a new display and same problem, no touch and some horizontal lines. What can I check? Thank you.

Hi guys,
I hope that it will help you.
I can't post link's. Just search google for this aTujSKxM4Vg .
Thank's .

Pallle · 03-14-2016, 22:37

[QUOTE=jojojiji;11689493]I already checked in zxw for r2412 but it does not show any other connections. only the one is red that I posted in the picture...[QUOTE]

Hi

The other side of the r2412 go to c2440 and u2402.
Remove c2440 and check.

03-08-2016, 04:08	#1 (permalink)
jojojiji Junior Member Join Date: Feb 2016 Posts: 32 Member: 2537858 Status: Offline Thanks Meter: 34	iphone 6 plus no touch Hi guys, I have an iPhone 6 plus with no touch problem. I changed both touch IC's but still no touch. I checked connectors and they are fine. I tried a new display and same problem, no touch and some horizontal lines. What can I check? Thank you.

03-10-2016, 20:58	#2 (permalink)
jimchu316 Freak Poster Join Date: Sep 2014 Location: CN & NZ Posts: 388 Member: 2252373 Status: Offline Thanks Meter: 400	logic board pcd fracture check all touch socket pins resistance. if fine, check CPU Last edited by jimchu316; 03-10-2016 at 21:08.

03-12-2016, 01:38	#4 (permalink)
tochits Freak Poster Join Date: Sep 2008 Location: U.S.A Posts: 382 Member: 856640 Status: Offline Sonork: 100.1606320 Thanks Meter: 281	just try again to change the line touch controller IC... sometimes IC is defective.got experience change 3x no luck. but on the 4th time success.

03-12-2016, 21:09	#5 (permalink)
jojojiji Junior Member Join Date: Feb 2016 Posts: 32 Member: 2537858 Status: Offline Thanks Meter: 34	Guys, I think I found the cause of the touch problem, PP_SAGE_TO_TOUCH_VCPH_CONN pin 36 of the touch connector is grounded, this is a power line and should not be grounded, I checked on zxw tool but I can't find the cause of the short. Any one has experience with this problem? Thank you.

03-12-2016, 21:55	#7 (permalink)
jojojiji Junior Member Join Date: Feb 2016 Posts: 32 Member: 2537858 Status: Offline Thanks Meter: 34	Here is an image that shows PP_SAGE_TO_TOUCH_VCPH_CONN grounded on the connector, but not grounded on the resistor

03-13-2016, 21:22	#11 (permalink)
jimchu316 Freak Poster Join Date: Sep 2014 Location: CN & NZ Posts: 388 Member: 2252373 Status: Offline Thanks Meter: 400	r2412 to pin 45 of j2401 , j2401 right side top No#5 pin, PP_SAGE_TO_TOUCH_VCPH_CONN is pin 36, j2401 right side bottom No#10 pin, No# 6 pin.

03-13-2016, 21:32	#12 (permalink)
jimchu316 Freak Poster Join Date: Sep 2014 Location: CN & NZ Posts: 388 Member: 2252373 Status: Offline Thanks Meter: 400

03-14-2016, 22:37	#15 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	[QUOTE=jojojiji;11689493]I already checked in zxw for r2412 but it does not show any other connections. only the one is red that I posted in the picture...[QUOTE] Hi The other side of the r2412 go to c2440 and u2402. Remove c2440 and check.