How NO TO DO diagmosis. Run multimeter in diode mode - check caps near BB PMU - find short - give 0,5 -1V in the shorted line - see who heats - PROFIT. 3 minutes diagnosis. Of course then if you checked that resistance is good you be able to check voltages, but 7 of 10 devices on Qualcomm BB will have a short , so it is good known failure.
@@ratupmyass something not quite clear, if the Baseband CPU is shorted they say to replace CPU / baseband cpu / and baseband pmu , but you need these 3 even if the baseband cpu is shorted to another board?
Good morning Friends, My name is Uendel and I am a fa of your channel, thanks for the help you give us with your video, please if you can help me, I just repaired a lot of 30 iphones with IC audio problem, they were all well, but I have 4 of them who had a problem with Baseband and could give me a tip sed start with replacing BBPMU_RF or do reballing in baseband Note they are all QUALCON, thanks for the help
Sir . I have iphone 7 .. its icefall ic is broken..and my phone is not showing imei number..is there any connectiin between icefall ic and baseband ic???
I have an iPhone 7plus it came to me without a Nand IC. Will I still be able to board swap it and how am I supposed to obtain the wifi and bluetooth serial numbers to write it to the new nand ?
Thank you for the video. My question is if baseband shows imei but not modem firmware, could the baseband be shorted still or could be other components? I already took off the baseband and reballed but did not restore with itunes. Modem formware problems is related to baseband or other? Thank you i love REWA!
bro modem firmware problem is related to baseband because i have read on some website article.. so if your modem firmware is showing then your baseband ic is okay..
My question is : Would it be possible to have a jig that could read/write the shorted baseband cpu in order to transfer the IMEI data into a different fully working baseband cpu? This issue is very frequent, I have had many phones with this issue that gave me lots of headaches... Perhaps the Baseband CPU is shorted beyond the ability to recover it's data.
Sorry, we are dedicated to providing products and services for business clients. As for other repair demands of individual clients, repair shops nearby would be a good choice for you.
something not quite clear, if the Baseband CPU is shorted they say to replace CPU / baseband cpu / and baseband pmu , but you still use the baseband cpu , cpu and baseband pmu from this board to another board?
Hi Rewa Tech Team, I’m having problem on my iPhone 7, when brightness set to high, I got glitching at the bottom of the screen, when I set brightness low, it came back to normal. Screen record is doing fine if u’re on glitching, when I play back the video, no screen glitching.. I guess it’s the hardware problem, can u explain this? Thank u very much 🙏🏽
It can be caused if you put a white dock connector to a black iphone or putting a black dock connector to gold or silver iphone 7,so try different dock connector
Partial right, I guess. But the pin layout is the same no matter the color of the dock. There is however, an antenna attached to the dock it's self. If not connected the phones my have poor or no reception. In this case the Baseband is not working. The Baseband converts the incoming data into a broadcast frequency.
try resoldering the two half,check baseband chip. Use a jig to reattach the two half of the board and test before checking baseband chip Check corrosion on the two halfs soldering point
Apple need to engineer their pcb design to build a better phone not make it double stack like the latest iphone x’s pcb. All the flexi flexi or drop make the iphone pcb bend and there is a line that bend between the nand area and the other side that cause c12 pad on audio ic failed result in boot loop. Also that line cause the baseband pmic fail and send wrong voltage to the main baseband ic result in “no service” issues. I though they gonna reconstruct the pcb but instead of make the pcb stronger they double stack it. Oh well Apple
REWA iPhone Chip Level Logic Board Repair Training Course Schedule For Details: bit.ly/2EtiHZy Enroll Now: bit.ly/2YNyvNc Any further questions please contact us at: training@rewatechnology.com
How NO TO DO diagmosis. Run multimeter in diode mode - check caps near BB PMU - find short - give 0,5 -1V in the shorted line - see who heats - PROFIT. 3 minutes diagnosis.
Of course then if you checked that resistance is good you be able to check voltages, but 7 of 10 devices on Qualcomm BB will have a short , so it is good known failure.
You also can use power supply and thermalvision camera to see whot component as shorted without soldering capacitors and pmu and basband CPU
10 seconds diagnosis:
1. Find a short circuit
2. Place the motherboard in the trash can
Profit!
it's a short in the mobo trace so the board is now trash
@@ratupmyass something not quite clear, if the Baseband CPU is shorted they say to replace CPU / baseband cpu / and baseband pmu , but you need these 3 even if the baseband cpu is shorted to another board?
You are correct..... more device iphone 7 and 7 plus like this problem.... finally return
love this channel much,many information,sharing,tutorial.
For this issue apple made an article, i went in a apple store and they gave me a new one. It’s a fault on a specific version of iphone 7. Google it
Thank you rewa
thanks for video....i have a question....why u didnt injection voltage after remove bb_pmu for finding faulty capacitor or baseband?
Thanks
Good morning Friends, My name is Uendel and I am a fa of your channel, thanks for the help you give us with your video, please if you can help me, I just repaired a lot of 30 iphones with IC audio problem, they were all well, but I have 4 of them who had a problem with Baseband and could give me a tip sed start with replacing BBPMU_RF or do reballing in baseband
Note they are all QUALCON, thanks for the help
Thanks 🙏🏻 rewa
Sir . I have iphone 7 .. its icefall ic is broken..and my phone is not showing imei number..is there any connectiin between icefall ic and baseband ic???
У Rewa всегда интересное и познавательное кино 😀
I have an iPhone 7plus it came to me without a Nand IC. Will I still be able to board swap it and how am I supposed to obtain the wifi and bluetooth serial numbers to write it to the new nand ?
After the baseband repair can i use the phone as i used before?Or need to more protection?
Hard work👍😊😕🤔
Could you make those subtitles move any way faster? It's not like I want to read anything.
quality content
Sir!! My iphone 7 not showing IMEI and SE2_RF (icefall chip) is broken...is there any relation between broken chip and no imei??
Thank you very much for learning
Excellent !
Thank you for the video. My question is if baseband shows imei but not modem firmware, could the baseband be shorted still or could be other components? I already took off the baseband and reballed but did not restore with itunes. Modem formware problems is related to baseband or other? Thank you i love REWA!
bro modem firmware problem is related to baseband because i have read on some website article.. so if your modem firmware is showing then your baseband ic is okay..
My question is : Would it be possible to have a jig that could read/write the shorted baseband cpu in order to transfer the IMEI data into a different fully working baseband cpu? This issue is very frequent, I have had many phones with this issue that gave me lots of headaches... Perhaps the Baseband CPU is shorted beyond the ability to recover it's data.
I'm curious to see how long it takes Rewa to respond to this question. The answer is no, but do they know why?
I thought the Jc pro had a unit that could read/write bb CPU’s !! maybe I’m wrong..!
@@JessaJones EEPROM
you can still recover data with a dead bbcpu. the phone will just never get cell signal again
Luke if still activated yes ,if il hello screen mode i don’t think
Great job, Like.
Please I was changing an iPhone 7 plus Qualcomm board an I lose the baseband on it I need some solution how to follow it up thanks ❤❤❤❤
Hi sir. Can i ask where i visit your repair shop. My iphone7 encountered this no service. 😔
Sorry, we are dedicated to providing products and services for business clients. As for other repair demands of individual clients, repair shops nearby would be a good choice for you.
@@rewatechnology2008 c'est la même méthode avec les intel iphone 7
something not quite clear, if the Baseband CPU is shorted they say to replace CPU / baseband cpu / and baseband pmu , but you still use the baseband cpu , cpu and baseband pmu from this board to another board?
Hi Rewa I have 6s bcb I'm already replace bbpmu & baseband cpu 9635 & wtr ic but still same problem plz... Give me solution...
Hi Rewa Tech Team, I’m having problem on my iPhone 7, when brightness set to high, I got glitching at the bottom of the screen, when I set brightness low, it came back to normal. Screen record is doing fine if u’re on glitching, when I play back the video, no screen glitching.. I guess it’s the hardware problem, can u explain this? Thank u very much 🙏🏽
I had audio IC done, then 4 weeks later, this problem, is it related?
love y rewa technology
We do appreciate all love of you guys :)
Hi Rewa i have intel version bcb I'm already replace bbpmu but still same problem...how to confirm fault whare is fault plzzz.help me
hi I want to learn electronics. wish I can study there
great job
It can be caused if you put a white dock connector to a black iphone or putting a black dock connector to gold or silver iphone 7,so try different dock connector
Nice joke)
Александр Пашковский try then talk .big mout.
Partial right, I guess. But the pin layout is the same no matter the color of the dock.
There is however, an antenna attached to the dock it's self. If not connected the phones my have poor or no reception.
In this case the Baseband is not working. The Baseband converts the incoming data into a broadcast frequency.
good video
your sites are not opening, I want to order some tools and parts
very nice
If we update the software this problem will occur
Hi, I have an iPhone X I have soaked it with water and now I have no imei if you can help me?
try resoldering the two half,check baseband chip.
Use a jig to reattach the two half of the board and test before checking baseband chip
Check corrosion on the two halfs soldering point
@@ongchorcool Okay I'll try to change the chip
thanks
@@Thefox.youtube the baseband chip cannot be changed
If the baseband is broken it cannot be repaired
@@Thefox.youtube only baseband PMU can be changed
Apple need to engineer their pcb design to build a better phone not make it double stack like the latest iphone x’s pcb.
All the flexi flexi or drop make the iphone pcb bend and there is a line that bend between the nand area and the other side that cause c12 pad on audio ic failed result in boot loop. Also that line cause the baseband pmic fail and send wrong voltage to the main baseband ic result in “no service” issues.
I though they gonna reconstruct the pcb but instead of make the pcb stronger they double stack it. Oh well Apple
👆👆👆 thanks for helping me unlock my iphone, can't thank you less much appreciated!!!
good
there is no way to repair amux1 :(
عمي هناه الصيانه 👌👌
My iPhone X says no service sometimes
Reball motherboard first apart those two pcb
Just don't try to fix baseband issues. 95% of the time, it is not repairable due to baseband cpu shorted.
اللي فهم يترجم لنا ي شباب
Chắc nhiều ng vẫn con chưa hiểu giống tui kk
Очень познавательно,жаль,что запоздало:(
Tip: Apple will replace the device free of charge.
No they won't. Even with Apple Care, you'll still need to shell $200+ for a replacement.
Why dont just replace those two component which was shorted??
In that cases u have to change the proccessor which is forbidded for rewa
Я не понял, в итоге в чем была проблема?
модем в коротком замыкании. типа нельзя починить
Можно махнуть модем, и даже запилить в него левцю прошивку, но скорее всего не взлетит
👍
Ipone repairing system 👎
♥️
REWA iPhone Chip Level Logic Board Repair Training Course Schedule
For Details: bit.ly/2EtiHZy
Enroll Now: bit.ly/2YNyvNc
Any further questions please contact us at: training@rewatechnology.com
👍👍👍👍👍👏👏👏👏👏👏
👆👆👆 thanks for helping me unlock my iphone, can't thank you less much appreciated!!!