Showing posts with label Electronics repair. Show all posts
Showing posts with label Electronics repair. Show all posts
13 December, 2016

Reusing power sources to power devices of different voltages: voltage converters

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42V DC Power 19V 2A regulated DC to charge a laptop that spends 3A In this post we will see  how to feed these appliances we have at ...
18 August, 2016

Repairing a Chinese Li-ion battery charger 42V "Rait" brand

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The circuit: in one UF1004 dissipating diode and a  MOSFET 600V N   MDP11N60 (left) A collegue  had broken his battery charger, he told...
15 July, 2015

Changing the hard drive of a Lacie Network Space 2

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A couple of years ago I bought  this super NAS  (Network Storage) Lacie with Linux operating system, good performance and very low power ...
10 comments:
28 April, 2015

The plotter fails to recognize the cartridge: Repairing a 500-800 HP Designjet 42 "

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We had a problem with our plotter; it marked  "unrecognized cartridge" error  before finishing of each printed plan; when we ...
09 March, 2015

Repairing a tape backup LTO 2 unit: HP Ultrium 448 with broken tape

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In a unit Ultrium Fujitsu (HP) for backup, the tape had broken, being useless as the mechanism for capturing the tape was inside it. To re...
1 comment:
09 February, 2015

Repairing and Adflo Speedglas battery ref 837621 with LI-ION 4.2V Cells

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Lately  I have been repairing multiple wireless devices whose NI-MH batteries have deteriorated  ; usually get considerably cheaper mak...
20 comments:
06 February, 2015

Repair of electronic tracks on an old keyboard: Conductive silver liquid

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In this post we will repair CNC keyboard that is no longer being manufactured Contacts on the keyboards have evolved from mechanical sy...
3 comments:
30 January, 2015

Building your own High Quality CREE LED lamp with 700 lumens and spending only 6W

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Mounted lamp with recycled parts In this post  we will see how to build a LED lamp for your house with 700 lumens with only 6W power  c...
25 January, 2015

Repairing an LCD screen: Replacing blown capacitors

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The  capacitors  are famous for electrolytic fail when subjected to long time of use, temperature and stress, swelling and bursting the top ...
29 October, 2014

Changing the display cable on a laptop

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Acer Aspire 5930G with the display cable fixed Earlier I commented  that in several ACER laptops the picture failed by the cable, and t...