Samsung Note 3 Sm-N900 Gyro/Acellerometer IC Replacement - GSM-Forum

loomingx · 11-26-2014, 00:43

Hi,

I have reflowed 2 Gyro/Acellerometer's successfully and replaced another one successfully.

The one I am having trouble had liquid damage and 4 of the pads we're damaged and lifted further upon removal. I have replaced a brand new IC but I need to know if there are any alternative points I can jumper to from the chip to complete the circuit.

The picture attached points towards the pads that are missing.

Any help would be greatly appreciated!

http://imgur.com/nu0l8i1

hhto · 11-27-2014, 00:09

You are lucky, that legs are NC (not connected)

The NC pads are come up easily...

loomingx · 11-27-2014, 17:58

any suggestions on why is it not working? I ordered two replacements IC's directly from Samsung (my shop does authorized warranty work) and I'm still getting nothing in the Sensor test screen.

hhto · 11-27-2014, 18:36

on saturdy i will work next time, than i can tell you more or take few pic of the schem

loomingx · 11-27-2014, 18:42

Thank you very much! I was fairly sure that they were NC pads but I thought I'd double check with people that have more experience than myself.

hhto · 11-29-2014, 19:11

loomingx · 11-30-2014, 19:25

From that schematic I can't see how the 4 pads that I lifted were all NC?

hhto · 11-30-2014, 23:48

The dot is at the first leg, so your missing pads are the 16, 17, and the 19, 21

loomingx · 11-30-2014, 23:58

oh ok to RESV and AUX_DA are still technically NC's. I'll hopefully take a look at the board sometime tomorrow. Thanks again!

loomingx · 12-02-2014, 20:04

I have a SM-N900W8 Note 3. I tried locating the capacitors from the schematic you provided off of the SM-N900 service manual but the layout is different and doesn't allow me to locate them.

Any suggestions?

hhto · 12-04-2014, 01:45

SM-N9005

More few things, which are can help you to find the fault easier.
-All sensors use this voltage: VREG_LVS1_1P8 and data lines (SENSOR_I2C_SCL, ..._SDL) so if all other sensors (light, baro, proxy) are works fine than the U201 and the U606 probably working properly.
In this case remain two things: soldering defect or component fault

I hope I could help

loomingx · 12-04-2014, 19:05

Thanks you for all your support! Nothing on the *#0*# Sensor test works but the replacement IC was purchased directly from Samsung so I am almost certain that it is not the fault. Does this mean it's more likely the u201 or u606?

I also replaced the 8RHD component with a non pentaband Note 3 model with a different label. Could this have any affect on the Gyro/Acellerometer not working?

shafiur · 12-06-2015, 17:01

hello
all gsm friend pleases need help ,Samsung N900 display light problem ,fast time only Samsung logo than light off .after time coll incoming & outgoing ok but no display light .next time original display Chang for not solve .

11-26-2014, 00:43	#1 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	Samsung Note 3 Sm-N900 Gyro/Acellerometer IC Replacement Hi, I have reflowed 2 Gyro/Acellerometer's successfully and replaced another one successfully. The one I am having trouble had liquid damage and 4 of the pads we're damaged and lifted further upon removal. I have replaced a brand new IC but I need to know if there are any alternative points I can jumper to from the chip to complete the circuit. The picture attached points towards the pads that are missing. Any help would be greatly appreciated! http://imgur.com/nu0l8i1

11-27-2014, 00:09	#2 (permalink)
hhto Junior Member Join Date: Aug 2014 Location: United Kingdom Posts: 18 Member: 2237030 Status: Offline Thanks Meter: 9	You are lucky, that legs are NC (not connected) The NC pads are come up easily...

11-27-2014, 17:58	#3 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	any suggestions on why is it not working? I ordered two replacements IC's directly from Samsung (my shop does authorized warranty work) and I'm still getting nothing in the Sensor test screen.

11-27-2014, 18:36	#4 (permalink)
hhto Junior Member Join Date: Aug 2014 Location: United Kingdom Posts: 18 Member: 2237030 Status: Offline Thanks Meter: 9	on saturdy i will work next time, than i can tell you more or take few pic of the schem

11-27-2014, 18:42	#5 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	Thank you very much! I was fairly sure that they were NC pads but I thought I'd double check with people that have more experience than myself.

11-29-2014, 19:11	#6 (permalink)
hhto Junior Member Join Date: Aug 2014 Location: United Kingdom Posts: 18 Member: 2237030 Status: Offline Thanks Meter: 9

11-30-2014, 19:25	#7 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	From that schematic I can't see how the 4 pads that I lifted were all NC?

11-30-2014, 23:48	#8 (permalink)
hhto Junior Member Join Date: Aug 2014 Location: United Kingdom Posts: 18 Member: 2237030 Status: Offline Thanks Meter: 9	The dot is at the first leg, so your missing pads are the 16, 17, and the 19, 21

11-30-2014, 23:58	#9 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	oh ok to RESV and AUX_DA are still technically NC's. I'll hopefully take a look at the board sometime tomorrow. Thanks again!

12-02-2014, 20:04	#10 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	I have a SM-N900W8 Note 3. I tried locating the capacitors from the schematic you provided off of the SM-N900 service manual but the layout is different and doesn't allow me to locate them. Any suggestions?

12-04-2014, 01:45	#11 (permalink)
hhto Junior Member Join Date: Aug 2014 Location: United Kingdom Posts: 18 Member: 2237030 Status: Offline Thanks Meter: 9	SM-N9005 More few things, which are can help you to find the fault easier. -All sensors use this voltage: VREG_LVS1_1P8 and data lines (SENSOR_I2C_SCL, ..._SDL) so if all other sensors (light, baro, proxy) are works fine than the U201 and the U606 probably working properly. In this case remain two things: soldering defect or component fault I hope I could help

12-04-2014, 19:05	#12 (permalink)
loomingx Freak Poster Join Date: Dec 2013 Posts: 100 Member: 2077936 Status: Offline Thanks Meter: 21	Thanks you for all your support! Nothing on the #0# Sensor test works but the replacement IC was purchased directly from Samsung so I am almost certain that it is not the fault. Does this mean it's more likely the u201 or u606? I also replaced the 8RHD component with a non pentaband Note 3 model with a different label. Could this have any affect on the Gyro/Acellerometer not working?

12-06-2015, 17:01	#13 (permalink)
shafiur Freak Poster Join Date: Sep 2008 Location: bangladesh Posts: 226 Member: 869889 Status: Offline Thanks Meter: 107	hello all gsm friend pleases need help ,Samsung N900 display light problem ,fast time only Samsung logo than light off .after time coll incoming & outgoing ok but no display light .next time original display Chang for not solve .