Hi guys; i have this posted in General electronics i move it here, hope here i have more luck to be helped thanks in advance.
https://www.badcaps.net/forum/showthread.php?t=23101
https://www.badcaps.net/forum/showthread.php?t=23101
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Re: Need help please.
It may be worth to spend $5 for the service manual:
http://www.technics.owner-manuals.co...-TECHNICS.htmlNever stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Need help please.
Since you are having problem with just the left channel as you had indicated in post1, I doubt that the regulator is the real cause of the problem since the regulator will supply voltage to both channels. Inspect more solder joints as suggested by kaboom.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Hi guys
I've been getting more air con controller boards of various brands for repair - mainly the ones from the outdoor compressor unit and I realise I have a lot of gaps in my specific knowledge, while being pretty good at electronic repair in general.
Does anyone know of any good resources for information on this sort of repair? I'm hoping here there will be some guys who are experienced in this. I'd specifically like more info on how the controller PCB works, because I expect they are all pretty much the same, and especially how it communicates with the indoor unit (protocols,... -
A very general question, when inject voltage and board draw over 4a and pull down 5v to 1v, but nothing is hot under thermal camera. Can I assume it is layer short? or it could be something very typical that I just have no idea of being a noob. -
I'm not sure if I am posting this in the right spot, I don't have any question or anything specific to one board. I am *kinda* starting out with this kind of work. I have been IT in one role or another for my job the last 30 years, and I am familiar enough with basic board stuff generally speaking. So, I dunno for example if someone told me to find a uart header, or flash some generic tsop8 something, etc I understand that kind of stuff. Point being, I'm not 100% clueless. I just don't have the specific knowledge when it comes to some of these more advanced repairs. I actually have spent the last... -
Hi guys,
Just a general question. Usually on mobile devices/laptops the battery pack consists of lithium ion cells with their +/- tabs welded onto the controller IC. I'm wondering, in general if it can be assumed that one can find a replacement lithium ion cell, is it ok to simply re-use the old controller IC in an attempt to re-build the pack? Or is that controller somehow paired to the cells from the factory?
From my experience it sometimes seems to be hit or miss. Not sure if this is true, but sometimes it's almost as if the controller IC will go to a failsafe... -
This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as...
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