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Samsung Hardware Repair Post here your Hardware Repairing Hints or Problems with Samsung Phones. |
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10-17-2015, 14:48 | #1 (permalink) |
Freak Poster Join Date: Feb 2014
Posts: 185
Member: 2127758 Status: Offline Thanks Meter: 26 | i9505 dead after power switch change I've a problem with 4x i9505... After a power switch replacement, all the four i9505 stop working... not power on... Any idea? Any solution? What can i check? Thanks... |
The Following User Says Thank You to Sakalalina For This Useful Post: |
10-18-2015, 12:23 | #3 (permalink) | |
Freak Poster Join Date: Feb 2014
Posts: 185
Member: 2127758 Status: Offline Thanks Meter: 26 | Quote:
Hi, thanks for reply... I've check U501 output voltage (C835=1.225V, C838=1.05V) and is OK... I've check the U800 output signal (R804=1.8V) and is OK... I've check the OSC801, and is not working...no 32kHz signal... Where i can find this OSC? In which other Samsung mainboard? i9100? PS. I've use a classic solder...no hot air... And... When the mainboard is off is absorm 0.1mA, when i turn on it absorb 58mA | |
10-18-2015, 20:45 | #4 (permalink) |
Freak Poster Join Date: May 2005 Age: 43
Posts: 433
Member: 144223 Status: Offline Thanks Meter: 10 | Bro, i can't help u In elettrical spare list don't have specific of this oscillator but maybe u can try on s4 mini cause the supervisor is the same of i9505.... on my experience this problem seems typical on supervisor (u800)..... |
10-19-2015, 06:52 | #5 (permalink) | |
No Life Poster Join Date: Mar 2003 Location: INDIA Age: 57
Posts: 555
Member: 25662 Status: Offline Thanks Meter: 190 | Quote:
check volt & 32khz on tp809 ~.900v aprox. | |
10-20-2015, 07:48 | #8 (permalink) | |
Freak Poster Join Date: Feb 2014
Posts: 185
Member: 2127758 Status: Offline Thanks Meter: 26 | Quote:
So, what does mean? That all is ok? Unfortunately the phone does still not working... http://s11.postimg.org/6axfh6gf7/IMG...020_083752.jpg I'll try to rehot u800... | |
10-22-2015, 05:53 | #9 (permalink) | |
No Life Poster Join Date: Mar 2003 Location: INDIA Age: 57
Posts: 555
Member: 25662 Status: Offline Thanks Meter: 190 | Quote:
change xtal or power ic. When you get exact frequency and still not on then do emmc procedure. you had changed switch so nearest part is wifi so check 1.8v on C214. If shorted then remove wifi IC. then check 1.8v. | |
10-22-2015, 08:54 | #10 (permalink) | |
Freak Poster Join Date: Feb 2014
Posts: 185
Member: 2127758 Status: Offline Thanks Meter: 26 | Quote:
I've check C214 and i've found 2.95v!!! So, i can try to remove the wifi IC or replace U800? Edit. I've try to connect the i9505 to a Octolus Jtag, and also the box doesn't recognize the chip... | |
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