hp (hewlett packard)

Alteration of the power supply for HP laptop igroSFERA.NET

16.10.2014

the modification of the power supply for laptop HP | igroSFERA.NET

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Alteration of the power supply for HP laptop

Alteration of the power supply for HP laptop igroSFERA.NET Today is brought to the repair of the power supply from the laptop HP Compaq NX7400. This power supply has one feature. The laptop is three wires instead of two:

  • external — common wire
  • internal — 19 Volt
  • Central — id signal.

With the first two clear — from them powered laptop. But the third wire (center wire) — required for charging laptops. And it works as follows: if on it there is no voltage, the battery charging is not happening, and if there is a voltage of a certain value, then turn on charging. The problem is that this value is not described anywhere, and the PSU — failed.

As always a way out was found on the Internet, on one of the forums. It turns out that Chinese Samodelkin has long been the core circuitry of the HP, and all produce their own power with this additional signal.

Here is a diagram of receipt of this signal:

Comments to the diagram:

334 — this symbol on the SMD-resistor, if it is decrypted, then the value will be Cam

capacitor (thanks to alert readers of the blog) = p = 0.1 microfarad. diode — any withstand voltage of 20 volts (better to take a 30-Walt).

This scheme is suitable for the following PSU:

384020-001, 384021-001, 384020-003, 391173-001,

409992-001, ED495AA, PA-1900-18H2, PPP014L-SA,

HP 2133 Mini-Note PC

HP 2533t Mobile Thin Client

HP Compaq 2230s Notebook PC

HP Compaq 2510p Notebook PC

HP Compaq 2710p Notebook PC

HP Compaq 6510b Notebook PC

HP Compaq 6515b Notebook PC

HP Compaq 6530b Notebook PC

HP Compaq 6535b Notebook PC

HP Compaq 6710b Notebook PC

HP Compaq 6715b Notebook PC

HP Compaq 6720t Mobile Thin Client

HP Compaq 6730b Notebook PC

HP Compaq 6730s Notebook PC

HP Compaq 6735b Notebook PC

HP Compaq 6735s Notebook PC

HP Compaq 6830s Notebook PC

HP Compaq 6910p Notebook PC

HP Compaq 8510p Notebook PC

HP Compaq 8510w Mobile Workstation

HP Compaq 8710p Notebook PC

HP Compaq 8710w Mobile Workstation

HP Compaq nc2400 Notebook PC

HP Compaq nc4400 Notebook PC

HP Compaq nc6140 Notebook PC

HP Compaq nc6320 Notebook PC

HP Compaq nc6400 Notebook PC

HP Compaq nc8430 Notebook PC

HP Compaq nw8440 Mobile Workstation

HP Compaq nw9440 Mobile Workstation

HP Compaq nx6310 Notebook PC

HP Compaq nx6115 Notebook PC

HP Compaq nx6325 Notebook PC

HP Compaq nx7300 Notebook PC

HP Compaq nx7400 Notebook PC

HP Compaq nx8420 Notebook PC

HP Compaq nx9420 Notebook PC

HP Compaq tc4400 Tablet PC

HP EliteBook 6930p Notebook PC

HP EliteBook 8730w Mobile Workstation

Compaq Presario CQ40 Series

Compaq Presario CQ45 Series

Compaq Presario CQ50 Series

Compaq Presario CQ60 Series

Compaq Presario CQ70 Series

HP Pavilion G50 Series

HP Pavilion G60 Series

HP Pavilion G70 Series

HP OmniBook 300 Series: 300

article Summary: hp (hewlett packard)

Source:
Alteration of the power supply for HP laptop | igroSFERA.NET

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