iPhone 7 Plus, Tristar?

Question

iPhone 7 Plus

2016年9月16日に発売。モデル番号は1778,1784。 GSM かCDMAの32、128、256GBがあり、色はローズゴールド、ゴールド、シルバー、ブラック、ジェットブラックがあり。

1366回答すべてを表示

Silas @sibo

評価: 37

4

2

投稿日: 2018年9月13日

オプション

iPhone 7 Plus, Tristar?

Hello,

I have a customers 7+ here which we initially replaced a battery on due to poor battery life. After the initial battery replacement, the customer returned within the week with the device not charging past 8%. Replaced the battery under warranty, which seemed to resolve the issue, however the device was gaining percentage rather slowly. Replaced the battery for a third time to good result.

Customer returned with the device not booting past the apple logo. Replaced the battery again (!) in an effort to be thorough, and performed a factory reset.

Device charges normally (0.9amp) seems to hold charge fine, but now the customer has returned with the device spontaneously rebooting at any percentage below 90%.

Performing a DFU reset, before giving up and sending it to a microsolderer.

Does anyone have any insights?

Greatly appreciate your time.

Thanks.

回答がありました！ 回答を表示同じ問題があります

この質問は役に立ちましたか？

はいいいえ

スコア 1

2 件のコメント

Yeah, if it were my guess it would be the tristar chip. Probably best that you sent it to a microsolderer as those things are very difficult to repair.

[deleted] さんによる2018年9月13日

I agree with Aaron. The Tristar (U2) chip needs replacement.

Steve さんによる2018年9月14日

コメントを追加

1 件の回答

ベストアンサー

Minho @refectio

評価: 221.5千

15

290

807

投稿日: 2018年9月14日

オプション

I would inspect the logic board near the battery connector. There are several (tiny) passive components there including a resistor (R2201) that is on the line that communicates the battery status to the CPU. If this part gets damaged or dislodged, then it will give you the same symptoms.

This also requires a micro-soldering repair.

このアンサーは役に立ちましたか？

はいいいえ

スコア 2

3 件のコメント:

I had a look at the resistor you mentioned, it seems to be in top shape, not wobbly, burnt or in any way harmed. Does it therefore just default to tristar for issues similar to this?

Thanks for your reply, appreciate it greatly.

Silas さんによる2018年9月18日

Most likely.

Minho さんによる2018年9月18日

Thanks for your insight Minho, I've sent it off for further inspection.

Cheers,

Silas.

Silas さんによる2018年9月20日

コメントを追加

Yeah, if it were my guess it would be the tristar chip. Probably best that you sent it to a microsolderer as those things are very difficult to repair. — [deleted]
I agree with Aaron. The Tristar (U2) chip needs replacement. — Steve
I had a look at the resistor you mentioned, it seems to be in top shape, not wobbly, burnt or in any way harmed. Does it therefore just default to tristar for issues similar to this?

Thanks for your reply, appreciate it greatly. — Silas
Thanks for your insight Minho, I've sent it off for further inspection.

Cheers,

Silas. — Silas

iPhone 7 Plus

iPhone 7 Plus, Tristar?

1 件の回答

回答を追加する