Just a quick one. This delightful NAD 5425 CD player.
Arrived skipping / not reading discs and no display.
Skipping and intermittently not reading discs was an easy fix, a quick clean up of the optics with an airduster, and very careful cleaning of the lens (DON'T USE IPA HERE! - it can damage the optical coating on the lens. It's easy just to breathe on it, and give it a gentle wipe with something lint-free). That had it playing even the most mangy looking disc!
The main board is removed ....
.. and the display cowl removed (there's a couple of screws underneath, and a plastic clip.)
... and an open-circuit incandescent lamp is the culprit...
To improve reliability, and LED and 1K limiting resistor is fixed in place. Note the capton tape to insulate it electrically from the links on the board below. Anode (+ve) is to the right in this picture.
The LED I chose was a wide-angle, warm white LED, which I hope will match the original incandescent lamp closely.
... which is does nicely!
I've not tried these wide-angle LEDs before. They're quite good. These are both warm white examples, although they differ in colour slightly! You can clearly see the focussed "beam" coming from the right hand LED, and the much more diffuse spread of light from the left hand "wide-angle" LED.
Job done. Another saved from landfill!