Beomaster 8000 Restoration: Displays
Beomaster 6000: Input source display with new surface mount LEDs installed.
Many Beomaster 6000s have display segments that are missing. The reason for this is the way they manufactured these displays in the 1980s. In those days the individual LEDs of the displays were not encapsulated with the bonding wires fully exposed. This resulted in vulnerability to oxidation, vibration and thermal stresses, and over time the wires can disconnect. Luckily, this can be fixed by replacing all individual segment LEDs with modern 0603-package surface mount LEDs. Note, that due to the much higher efficiency of modern LEDs the intensity of the LEDs needs to be reduced to achieve the original look. Since there is no obvious way to reduce the intensity via a circuit modification, window tint needs to be inserted into the display enclosures.
Please, visit these blog entries at http://beolover.blogspot.com for detailed accounts of this restoration procedure:
Please, visit these blog entries at http://beolover.blogspot.com for detailed accounts of this restoration procedure:
- http://beolover.blogspot.com/2012/09/beomaster-8000-display-repair-hopefully.html (this blog entry gives a description of the LED replacement procedure used for Beomaster 8000 displays - the same procedure can be used for the 6000, but a sheet of window tint needs to be inserted to reduce the LED intensity - see blog entry below)
- http://beolover.blogspot.com/2011/10/beomaster-6000-display-repair-intensity.html (unfortunately there is no obvious way to adjust the display intensity via a circuit modification. Hence, I adjusted the intensity by inserting window tint between the LEDs and the segment bezels.)
