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iPhone stand by circuit

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stand by circuit referred to circuit that

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mobile phone has worked before the switch is pressed

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damage stand by circuit can cause different faults

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the common types of faults in

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stand by circuit are short circuit

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and electric leakage

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short circuit means that

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after the memeboard is connected to power cord

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the adjustable power supply

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directly displays the current

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of more than 300 million MPs

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electric lickage means that

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afternoon board is connected to power cord

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the adjustable power supply

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directly displays the current between

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1 to 300 million MPs

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next

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let's observe the two fault phenomena through video

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let's first observe the current jump of good memeboard

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after plugging in the power cord

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the current is not displayed

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when triggered switch the current will jump

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it will jump more than 1A and fall back

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then

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this current is current phenomena of good memeboard

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next let's take a look at

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current change of the short circuit

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after the power cord sparkled

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the current directly reaches about 500 million MPs

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after this meaning board is connected to the power

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court the current directly reaches 1.7 a

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after this meaning board is connected to power court

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the current directly reaches 4.9 a

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and the voltage is pulled down

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if current about 300 million MPs

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it belongs to the short circuit

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there are many names in the actual midness

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like high current

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short circuit during connection or big short circuit

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actually they refer to the same fold

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and their midness methods are the same

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let's look at current change of the electric leakage

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after the power cord sparkled

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the current showed 6 million peers

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after the Power Court sparkled

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the current shows 23 million MPs

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after the power chords buckled

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the currential 70 million MPs

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we just saw that these three currents are all

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below 300 million MPs

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they belong to the electric leakage

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and their midness methods are the same

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through the video just now

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have you

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Learned to distinguish the fault of the standby circuit