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当前版本: oldturkey03 (投票详情) ,

标题:

How to test Chestnut output voltages iPhone 5c

文本:

Im fixing an iPhone 5c, with display issues after a drop.  The measurements i got in diode mode are:

Vcc main 0.153

Batt vcc   0.410

I tested all of the pins on the J5 connector that I thought could have something to do with image.  There were two OL results:

PN5V7_LCM_AVDDN_CONN

LCD_PIFA

I know that the first one, PN5V7 LCM, comes from Chestnut.  Is it likely a shorted cap on this line?

I tried testing output voltages from Chestnut, but I cannot figure if i am doing it correctly.  I hooked up my DCPS and measured that 4.5v was getting to Chestnut at C47.  But when i went to measure an output voltage at C329 i get no volts.  How do i measure output volts at Chestnut or Tristar or even Pmic?

设备:

iPhone 5c

状态:

open

已接受的回答:

593226

编辑: pts8091 ,

标题:

How to test Chestnut output voltages iPhone 5c
How to test Chestnut output voltages iPhone 5c

文本:

Im fixing an iPhone 5c, with display issues after a drop.  The measurements i got in diode mode are:

Vcc main 0.153

Batt vcc   0.410

I tested all of the pins on the J5 connector that I thought could have something to do with image.  There were two OL results:

PN5V7_LCM_AVDDN_CONN

LCD_PIFA

I know that the first one, PN5V7 LCM, comes from Chestnut.  Is it likely a shorted cap on this line?

I tried testing output voltages from Chestnut, but I cannot figure if i am doing it correctly.  I hooked up my DCPS and measured that 4.5v was getting to Chestnut at C47.  But when i went to measure an output voltage at C329 i get no volts.  How do i measure output volts at Chestnut or Tristar or even Pmic?

设备:

iPhone 5c

状态:

open

原帖由: pts8091 ,

标题:

How to test Chestnut output voltages

文本:

Im fixing an iPhone 5c, with display issues after a drop.  The measurements i got in diode mode are:

Vcc main 0.153

Batt vcc   0.410

I tested all of the pins on the J5 connector that I thought could have something to do with image.  There were two OL results:

PN5V7_LCM_AVDDN_CONN

LCD_PIFA

I know that the first one, PN5V7 LCM, comes from Chestnut.  Is it likely a shorted cap on this line?

I tried testing output voltages from Chestnut, but I cannot figure if i am doing it correctly.  I hooked up my DCPS and measured that 4.5v was getting to Chestnut at C47.  But when i went to measure an output voltage at C329 i get no volts.  How do i measure output volts at Chestnut or Tristar or even Pmic?

设备:

iPhone 5c

状态:

open