How to use bitmap

This video mainly explains how to use bitmap

When using bitmaps, generally use some shortcut keys to operate

Sliding the scroll wheel of the mouse up means that the bitmap is zoomed in,

and sliding the scroll wheel down means that the bitmap is zoomed out

After clicking any red solder point in the bitmap,

if the solder points at different positions also turn into the same yellow color

The same yellow means they are connected

When the multimeter buzzer to measure any two yellow points, it will display 000

If OL is displayed,

it means that the line is disconnected and we have to connect it with a wire

Next, let me demonstrate the application of the bitmap in actual maintenance

For example, when repairing iPhone 12 without display failure,

it is necessary to measure the diode value of the display connector

The measured value can be compared with the reference value given by the bitmap

If the value is 0, it means that there is a short circuit

and the components connected to the line are damaged

If the measured value is similar to the reference value, it is normal

If the measured value is OL,

it means that there may be a disconnection in the line

For example, when measuring the pin, the value shows OL,

it is possible that the pin is disconnected

Next, let's check the reference value given by the bitmap

After we open the iPhone 12 bitmap,

slide the mouse wheel up to zoom in on the bitmap,

and it will show that there will be a corresponding value on the connection seat

Just measured the value of the 9th pin is OL

The reference value given in the bitmap is also OL

After clicking the pin, the other connector pin also turns yellow,

indicating that the two pins are connected

This pin is only connected to the socket, not connected to other chips,

indicating that the OL value is also normal

At this time, we can also use the multimeter buzzer to measure whether the two pins are connected

If they are connected, it means that there is no problem with the line

Let's measure

The multimeter is first adjusted to the buzzer position,

one marker measures the connector pin 9,

and the other marker easures the second pin of the lower connection seat

The value shows 000.5,

which means that the line is connected, indicating that the line is normal

Ok, that's all for this video