Iphone X VDD_Main Short Repair Done. - GSM-Forum

CDMA_RASHID · 09-13-2018, 14:40

Hi there Everybody.

Just Received an Iphone X That was dead.

After inspecting I found that the phone had short on VCC_Main Supply.

When connected to DCPS it was consuming 3.Amps.

Separated the upper and bottom PCB.

After separation Connected the Upper Pcb To DCPS and found that the short is not on the upper part but on the bottom Board.

After Inspection i found that the VDD_main Power Line was Short.

Injected 4Volts to VDD_Main supply to see which parts get Warm.

Two Caps were Heating C303 and C304 but C304 was found to be short.

After Removing Shorted Cap the short on VDD_Main Was Gone.

After Removing Short Reballed the bottom PCB with Stencil.

Successfully Reballed PCB

Soldered back both PCB's.

Phone Repaired Successfully. Alhamdulillah.

Sorry for Such Long Post. :)

Hope it helps someone.

christina_ · 09-19-2018, 21:40

Hello, I messaged you in PM

lok makara · 09-27-2018, 15:35

Thank you Boss

maxlite · 09-03-2019, 09:04

Thank you sir. its a big help

09-13-2018, 14:40	#1 (permalink)
CDMA_RASHID No Life Poster Join Date: Jul 2008 Location: Mumbai Age: 36 Posts: 1,023 Member: 821646 Status: Offline Thanks Meter: 507	Iphone X VDD_Main Short Repair Done. Hi there Everybody. Just Received an Iphone X That was dead. After inspecting I found that the phone had short on VCC_Main Supply. When connected to DCPS it was consuming 3.Amps. Separated the upper and bottom PCB. After separation Connected the Upper Pcb To DCPS and found that the short is not on the upper part but on the bottom Board. After Inspection i found that the VDD_main Power Line was Short. Injected 4Volts to VDD_Main supply to see which parts get Warm. Two Caps were Heating C303 and C304 but C304 was found to be short. After Removing Shorted Cap the short on VDD_Main Was Gone. After Removing Short Reballed the bottom PCB with Stencil. Successfully Reballed PCB Soldered back both PCB's. Phone Repaired Successfully. Alhamdulillah. Sorry for Such Long Post. :) Hope it helps someone.

09-19-2018, 21:40	#2 (permalink)
christina_ Freak Poster Join Date: Jan 2010 Location: Canada Posts: 340 Member: 1211915 Status: Offline Sonork: 345634564 Thanks Meter: 93	Hello, I messaged you in PM

09-27-2018, 15:35	#3 (permalink)
lok makara Junior Member Join Date: Dec 2012 Location: Cambodia. Phnom Penh Age: 34 Posts: 18 Member: 1853269 Status: Offline Sonork: 100.650600 Thanks Meter: 1	Thank you Boss

09-03-2019, 09:04	#4 (permalink)
maxlite Junior Member Join Date: Feb 2013 Posts: 2 Member: 1878946 Status: Offline Thanks Meter: 0	Thank you sir. its a big help