6s Water Damage Show High Current On Power Supply

Question

iPhone 6s

2015년 9월 25일 출시. Model A1688/A1633. 수리는 이전 모델과 유사하며 스크류 드라이버 및 비집는 도구가 필요합니다. GSM 또는 CDMA / 6, 64, 또는 128GB / 은색, 금색, 스페이스 그레이 및 로즈 골드로 제공하였습니다.

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AGS @ags_studio

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6s Water Damage Show High Current On Power Supply

Hi everyone.

I have 6s water damage. I clean the board with isopropilic alcool.

After cleaning the phone turn on but not Recognize USB Cable.

I changed Tristar but no solve the problem, then i Reball (not change) Tigris and phone begin recognize usb and charge.

After two days the phone not work.

When i connect it to DC power supply, it shows 0.04 without turn the phone.

When i turn on the phone, it shows randomly high and low current, like 1,9 1,8 0,9....

Somebody think it depends on Tigris IC ( because it reballed IC and not new) Or i have to search the problem on some other component.

VERY SORRY :( for my english :)) Thanks a lot

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Minho @refectio

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With a water damaged phone, all bets are off :>).

You should try a new Tigris just to eliminate that as a possibility but I would also take a close look L2300/C2300. Any issues there would cripple the output of Tigris. You'll also want to look at the TIGRIS_ACTIVE_DIODE LINE (and the MOSFET) to see if it is working properly. It should switch from high to low when a charger is connected.

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Thanks a lot Minho.. I checked the motherboard yesterday, and find Vcc Main Short on this phone.. its strange the phone turn on..

I try to put out Tigris but short remain.. I read somewhere its possibile to give current only vcc main line and check the hottest component to find the short (with cold spray), its is really possibile.? if yes,, i . can connect DCC power Supply Black Cable for any component who find vcc main and turn on the phone for find short????? if i m wrong, cuold u plz tell me the write procedure? thanks

AGS 의 2018년 5월 25일

you will need to solder the negative wire to ground and the plus to a component at vcc_main side

daniel 의 2018년 5월 25일

Thanks a Lot Daniel.. in this case its not neccesary turn on the phone, i can increase only the amphere button right?

AGS 의 2018년 5월 25일

Ideally, you want to start with a low voltage like 2.5V. If something on VCC_MAIN is dead short, it will heat up right away but there won't be enough voltage to damage anything else.

Minho 의 2018년 5월 25일

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Thanks a lot Minho.. I checked the motherboard yesterday, and find Vcc Main Short on this phone.. its strange the phone turn on..

I try to put out Tigris but short remain.. I read somewhere its possibile to give current only vcc main line and check the hottest component to find the short (with cold spray), its is really possibile.? if yes,, i . can connect DCC power Supply Black Cable for any component who find vcc main and turn on the phone for find short????? if i m wrong, cuold u plz tell me the write procedure? thanks — AGS
you will need to solder the negative wire to ground and the plus to a component at vcc_main side — daniel
Thanks a Lot Daniel.. in this case its not neccesary turn on the phone, i can increase only the amphere button right? — AGS
Ideally, you want to start with a low voltage like 2.5V. If something on VCC_MAIN is dead short, it will heat up right away but there won't be enough voltage to damage anything else. — Minho