Hi,
I have an external CCTV microphone photos attached. The two cables (green and blue have come off the little microphone chip) however the pad has gone off the chip when someone dropped it.
There are a few metal bits poking up but solder wont attach as the pad has gone. Is there a way to repairing it? (I can solder) I was thinking of trying to attach a trace pad to the metal bits to see if it joins.
I have seen online some of them have the copper pads further down. Could I scrape the top off and go straight to the pad that way?
I...
74kieran
Member
Last Activity: 05-02-2023, 02:12 PM
Joined: 12-27-2021
Location: Uk
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Query regarding repairing external CCTV microphone
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Re: MacBook Air A1370 charging issue
I have found the the green light only works when laptop is on. But the laptop still decharges. I have also found if the laptop is used without battery then it will shutdown randomly(Anywhere up to 1 minute). I have also found that L7630 is getting hot -
Re: MacBook Air A1370 charging issue
Is there any common issue to this sort of issue?Leave a comment:
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Re: MacBook Air A1370 charging issue
Currently looking at U9480 as there is no voltage on any pin. I am currently following schematics backwards to see where the 3.3v stopsLast edited by 74kieran; 04-12-2022, 12:09 PM.Leave a comment:
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Re: MacBook Air A1370 charging issue
Hi,
Sorry it has been a while. I have done some further testing. Here are all of my finding so far
U7000 Pin 18 to R7051 pin 1 is 0hms Voltage of R7051 pin 1 is 0.16v
U7000 Pin 17 to R7052 pin 1 is 0hms Voltage of R7052 pin 1 is 0.16v
C7050 Pin 1 is 0.17v (This does move around 0.13v-0.18v)
C7050 Pin 2 is 0.17v (This does move around 0.13v-0.18v)
U7000 Pin 18 is 0.18v
U7000 Pin 17 is 0.18v
The schematic you shown for U7000 is for a different board. Is...Leave a comment:
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Re: MacBook Air A1370 charging issue
Image...Leave a comment:
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Re: MacBook Air A1370 charging issue
I don’t think they are touching. I have included a photo. It’s strange as I had no continuity before plugging it in. Soon as I plug a charger in and unplug it. There is no continuity. I’m get 0.03-0.04 ohms. Would this be a faulty IC chip do you recon?Leave a comment:
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Re: MacBook Air A1370 charging issue
I agree it does look like there is a solder short. Going to order a better microscope now which hopefully comes tomorrow so can double check. It seems i get 0.03ohms on R7051 and 0.01ohms on R7052.
When it comes tomorrow I will double check and update the thread.
Thanks for your helpLeave a comment:
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Re: MacBook Air A1370 charging issue
I will re check my PP3V42_G3H_REG voltageLeave a comment:
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Re: MacBook Air A1370 charging issue
Hi,
0v each side. And attached a image
Thanks...Leave a comment:
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Re: MacBook Air A1370 charging issue
Hi,
It seems to still be no voltage. I am going to have to get a better microscope as the magnifying tool I have isn't great.
However, I have tried continuity on chip C7050. Would this cause me issues with seeing the voltage? If I check the resistance, I am getting zero from the the U7000 to the R7051 and R7052 chip.
ThanksLeave a comment:
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Re: MacBook Air A1370 charging issue
D6905 - pin 1- 7.58v pin 2- 7.13v pin 3- 7.33v
R7051 - pin # 1 - 7.36v
R7052 - pin # 1- 7.36v
Pin # 18 (CSOP) of U7000 - 0.10v
Pin # 17 (CSON) of U7000- 0.10vLeave a comment:
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Re: MacBook Air A1370 charging issue
Hi,
L6995 is 3.42vLeave a comment:
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Re: MacBook Air A1370 charging issue
Is there a motherboard schematic which will help me locate the pins?
ThanksLeave a comment:
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Re: MacBook Air A1370 charging issue
820-2855Leave a comment:
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Re: MacBook Air A1370 charging issue
1 - ground
2- 7.1v
3- 7.2v
4- 7.2v
5- 3.2v
6- 3.2v
7- ground
8- ground
9- ground
10-ground
11-ground
The order is right the left when looking at the battery connector.
Strangely now the laptop will not work without the charger. But the charger is not charging the battery.Leave a comment:
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Re: MacBook Air A1370 charging issue
It does the same thing with a new battery. Is there anything else which can cause this issue?
ThanksLeave a comment:
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Lenovo ideapad s440 schematic required
Hi,
Does anyone have the motherboard schematic for the Lenovo ideapad s440?
Thanks -
Re: Lenovo Ideapad S440 Turns on then straight off (Short)
Ignore previous messages
I have been trying to locate a clicking sound on the mobo but so far no good.Leave a comment:
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Re: Lenovo Ideapad S440 Turns on then straight off (Short)
Here is it PF201...Leave a comment:
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