I would like to know power jack socket mounted on rear portion of HP flatbed scanner model HP2300c termination polarity. i.e center pin is +ve OR -ve? I know required supply is 12DC @ 1.2A. I just want socket polarity mounted on scanner.

it should be marked in two places, first on the back of the power supply and then next to the power jack itself.

According to the owners manual the center pin is negative. This is somewhere after page 10,11 or 12 in the manual...


http://support.radioshack.com/support_electronics/doc62/62188.pdf

Standard design especially with chargers will depend on the plug. If it is a standard jack plug with the hole in the centre then the pin on the socket will be positive

If you can find a jack for that model then you can just see which hole on the board the center pin connects to. Positive is usually the biggest pin underneath in the center of the socket. The rest of the holes are usually
-ve / ground. Just paste this in Ebay search box.
acer travelmate 220 dc socket

I believe it is 12V 1.25A (you can use 12V 1.5A or 2A) Probably centre +ve, but look carefully at the scanner where the power lead plugs in, it may show the polarity and voltage on the plastic near the hole. Please report back? regards

Mustek 600 III EP Plus scanner, Power adapter type output +15VDC/1A Positive Polarity (positive inside and negative outside).

here's 2003, don't have 2008

Removal
NOTE: Left-hand dual arm mirror with heat shown, non-heated and aero mirrors similar.
All exterior mirrors

1. Position the exterior mirror glass in the full down position.

1. Grasp the top and carefully pull the exterior mirror glass away from the mirror housing.

1. Disconnect the electrical terminals (if equipped) and remove the exterior mirror glass.

Power exterior mirrors

1. Remove the jack pins from the exterior mirror glass backing plate.
   • Use pliers to grasp the jack pins at the base to remove.

Installation
Power exterior mirrors

1. Remove the sealing boots from the exterior mirror motor.

1. Install the jack pins in the sealing boots.

1. Install the jack pins and sealing boots.
   1. Hold the legs of the jack pins and push the jack pins back into the exterior mirror housing.
   1. Install the sealing boots so the boot shoulder is under the mirror collar and turn each jack pin until the head of the jack pin is aligned with the slots in the sockets on the backing glass plate.

All exterior mirrors

1. Place the new exterior mirror glass assembly down on a smooth firm surface.

1. Align the friction pins vertically to the exterior mirror glass backing plate socket and push down to snap the pivot ball into the socket.

1. CAUTION: Do not over heat the exterior mirror glass backing plate. Heat only until backing plate is warm to the touch.
   Using the special tool, warm the main pivot sockets in exterior mirror glass backing plate.

1. Loosely install the glass.
   1. Connect the electrical wiring to the electrical terminals (if equipped).
   1. Position the friction pins in the mirror housing.
   1. Align the jack pin locating tabs to match with the mirror glass back.

1. Using a flat hand, press on the center of the mirror glass until seated on the center pivot of the mirror housing.
   • Press the mirror glass toward one of the jack pins until snapped in place.
   • Repeat for second jack pin.

Power exterior mirrors
NOTE: If the jack pins do not engage, they may not be aligned correctly. Remove the exterior mirror glass, align the jack pins to the slots in the sockets and repeat the installation procedure.

1. NOTE: The jack pin should click while manually adjusting the exterior mirror glass.
   Tilt the exterior mirror glass to the full outboard position and then press on the outer side of the class until the in/out jack pin snaps into the socket on the exterior mirror backing plate.

1. NOTE: The jack pin should click while manually adjusting the exterior mirror glass.
   Tilt the exterior mirror glass to the full down position and then press on the outer side of the class until the up/down jack pin snaps into the socket on the exterior mirror backing plate.

I know this is an old thread, but I would like to post this information in the hope that someone will find it useful.
I just finished fixing this problem on my 1994 VS-6061... the problem is the PIP (Picture In Picture) board located on the Power Signal board. The PIP board contains the numbers 530B552. I bypassed the PIP board by following the directions I found at the following link:
http://forum.doityourself.com/entertainment-center-tvs-stereos-vcrs-dvds/130383-mitsubishi-cs-35301-rolling-picture-problem.html
"Plug in a 4.7ufd @ 35v filter cap (+)at pin 5,(-)at pin 11. Plug in a .01ufd(any voltage) between pin 7 and 9. Just plug the caps into the socket, where the PIP board was mounted (they don't need to be soldered). Just don't let the leads from the two capacitors touch, as they cross each other. The 0.01 cap is non-polarity, so either way it plugged is fine. Basically you will bypass y-signal through 4.7u, in pin 5, out pin 11, and bypass c-signal in pin 7, out pin 9 of the PIP socket.”

The bypass requires 2 capacitors: One 4.7ufd @ 35v and one Non-Polar 0.01ufd @ any voltage.
Remove the PIP board, then plug the two capacitors into the socket where the PIP board was mounted: plug the 4.7ufd capacitor with (+)at pin 5,(-)at pin 11 and plug in the non-polar .01ufd capacitor between pins 7 and pin 9.
If there is a ground wire (possibly brown) soldered to one of the tin cases on the PIP board, then you should connect this ground wire to the PIP socket either at pin 2, 4, 6, 8 or 10 which are grounds of the socket.
This PIP board was used in many Mitsubishi televisions and they were plagued with problems...This is why many of these older Mitsubishi televisions had similar problems…
Good luck

Delta Electronics
AC Adapter model ADP-36XB REV. B
Input:AC 100V-120V~850mA 50/60Hz
Output: 24V 1500mA LPS (Center positive)
Made in Thailand

The Polarity is moulded into the plug with + or - sign to centre pin and shell as appropriate- Usually also on the Scanner cvasing near the DC input socket.

OK generally they are 12 Volt at least 1amp with Center pin POSITIVE & NEGATIVE to the outer (Earth) any power supply that meets these requirements will be OK.