Fault, water into the second repair does not start. MOTHERBOARD: A2485 820-02100-11
1, dismantling inspection, found that the motherboard, touch board interface corrosion, the board has burned.
2. There is also corrosion around CD3218B12
3.3 audio amplifier parts, the surrounding corrosion, although the home has been cleaned, but still vaguely see, water left behind a variety of crimes,
4. There is also capacitor corrosion around the wifi module
5. Look at the hard drive. It's fine
6. Show the interface part, there is not serious corrosion marks
7.The initial measurements revealed that the PPBUS was short-circuited to the ground, apparently due to burning of the touch interface, so the next step was to scrape the touch panel interface to heal the wound until the PPBUS was tested -- normal.
8, the touch plate interface for bone scraping treatment, after careful hanging, the impedance to the ground finally returned to normal impedance recovery of about 400 ohms.
9. ACE CD3218, etch out for processing, and audio power amplifier end processing.
10, deal with CD3218. Install, power test, found that JF601 JF600 both ends are not boost, the current stays about 0.0246, test the other side, JG600, you can easily boost the current has been turned on. But unfortunately found dark screen. It's the damn backlight IC again.
11. On the backlight IC, reset, the fault is still, can only replace one, but this time very good has been able to find, do not dismantle the brand-new machine.
12. To replace the backlight IC, fortunately, the machine has miraculously turned on and the machine is perfect, but the machine is still not perfect repair, there, left TYPE-C, power port can not be used, only the right port can be charged, but also can only charge, can Not use some of the USB operation, of course, the touchpad must not be used, no idea can only put aside, waiting for inspiration to reproduce,
13. Some research has been done, but nothing has been resolved.
The second machine is out of order; the second machine doesn't turn on because of the water. It's the same one that burned a hole in the touchpad interface. The motherboard is a2442 820-02098-07
1. Disassembly detection motherboard as shown, the same formula, this design, it is too crappy, why water always burn here.[ATTACH]
[/ATTACH]
2. Look at the picture has been home, dug, motherboard has been dug through, but still testing the public end or short circuit, so give up directly.
Thank you for your patience, please understand the deficiencies!
1, dismantling inspection, found that the motherboard, touch board interface corrosion, the board has burned.
2. There is also corrosion around CD3218B12
3.3 audio amplifier parts, the surrounding corrosion, although the home has been cleaned, but still vaguely see, water left behind a variety of crimes,
4. There is also capacitor corrosion around the wifi module
5. Look at the hard drive. It's fine
6. Show the interface part, there is not serious corrosion marks
7.The initial measurements revealed that the PPBUS was short-circuited to the ground, apparently due to burning of the touch interface, so the next step was to scrape the touch panel interface to heal the wound until the PPBUS was tested -- normal.
8, the touch plate interface for bone scraping treatment, after careful hanging, the impedance to the ground finally returned to normal impedance recovery of about 400 ohms.
9. ACE CD3218, etch out for processing, and audio power amplifier end processing.
10, deal with CD3218. Install, power test, found that JF601 JF600 both ends are not boost, the current stays about 0.0246, test the other side, JG600, you can easily boost the current has been turned on. But unfortunately found dark screen. It's the damn backlight IC again.
11. On the backlight IC, reset, the fault is still, can only replace one, but this time very good has been able to find, do not dismantle the brand-new machine.
12. To replace the backlight IC, fortunately, the machine has miraculously turned on and the machine is perfect, but the machine is still not perfect repair, there, left TYPE-C, power port can not be used, only the right port can be charged, but also can only charge, can Not use some of the USB operation, of course, the touchpad must not be used, no idea can only put aside, waiting for inspiration to reproduce,
13. Some research has been done, but nothing has been resolved.
The second machine is out of order; the second machine doesn't turn on because of the water. It's the same one that burned a hole in the touchpad interface. The motherboard is a2442 820-02098-07
1. Disassembly detection motherboard as shown, the same formula, this design, it is too crappy, why water always burn here.[ATTACH]
2. Look at the picture has been home, dug, motherboard has been dug through, but still testing the public end or short circuit, so give up directly.
Thank you for your patience, please understand the deficiencies!
Attached Files
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