In this article I will be explaining how I changed the default green LEDs for the Play/Pause button by blue ones, like the Pioneer DVJ-X1 (and the later DVJ-1000).
This is not a step-by-step listing of every action I did, if you follow along you should be able to fill in the blanks. Some soldering and opening of players is involved so you will understand that by doing things like this you will void your right on warranty.
This mod was suggested by Nightmoves in this Forum thread. 'Is it possible to change lights of the cdj 1000mk2's start/button to those of the dvj. Would be cool to change it, since I'm just a sucker for the dvj's blue lights.'
This was an interesting idea so I went on a search and discovered that the blue LEDs of the DVJ can be swapped. In an ideal world you should also adjust the load resistors, but I settled for slightly dimmer illuminations than changing SMD resistors.
There is no real practical use or advantage to gain by doing this mod. The only thing it brings is a much nice illuminated ring around the Play/Pause button.
Be careful when opening the CDJ-1000MK2, do not put the top directly on the table to avoid scratches and damage. Instead put it on a towel or any other soft surface, preferably you need some foam supports.
You will need a small Philips screwdriver to remove the 3 screws on the back and all the screws on the underside. Take care to sort the screws so you know where they belongs when you will be reassembling the player.
Part number : SLR-343BBT
Description : D4207 - Blue LED
Price (in 2005) : € 7,- / piece
4 of these are needed
When you've unscrewed the bottom side of the CDJ1000MKII, you can open the backside like a book (when the slot-in is towards you). You will see in the control panel that holds the Play/Cue and search buttons in the bottom right corner. Look for the section that holds the Play Button LED's, like shown here.
In the red circle you see the section where the LED's are mounted. Their exact location is clearly printed beside the mounting points on the circuit board..
The parts to be replace in the CDJ are D1305 ~ D1308 (SLR-343EBT). First de-solder the LED's, than remove the circuit board and replace the LED's. Use the welding torch shortly (max 3 seconds per joint) so you don't overheat the LEDs or burn the circuit board!
Here is some more info about LEDs: LED is short for Light Emitting Diode.
A LED is a diode, an electronic component that only allows a current to flow in one direction. A LED consists of a piece of semi conducting material impregnated with impurities that create a structure called a p-n junction. While the current flows through the junction there is energy loss in the form of light.
The wavelength (so the color) of the light is determined by the type of p-n junction is used. The outer epoxy shell around the p-n junction can be fitted with a lens-like top that can bundle the light.
The color of the epoxy shape of the LED has only little influence to the color of the light which the LED emits. Nowadays most LED's are made of transparent epoxy so without powering them it's hard to tell the color
This type of component is used in lots of gear and equipment, it's the most affordable and reliable solutions to create light in the darkness. And besides this, the LED is also used this much because of it's efficiency.