hadrian333
Active Member
Until now, I lacked the resources to fully convert a MC2255 to LEDs. However with the advent of Northridge Electronics's multidirectional wedge and bayonet LED's, I finally converted a MC2255 completely with LEDs.
The MC2255 uses 4 bayonet type lamps (Ebay item #191021243889) to backlight the front panel. To replace them, just take the front panel assembly off and take out the old bayonet lamps and replace them with the LED's. There's no polarity on the LEDs so you can't put them in incorrectly. No soldering necessary.
To replace the other lamps, take out the upper cover by removing six screws that hold the cover assembly. For The VU meters, it uses 8 multidirectional wedge LED's (Ebay item #201013201462). You need to pry the 2 white clips that hold the display pcb above the VU meters. Then pull up the pcb and take the wedge lamps out of the socket and replace them with LED's. There's no polarity on the LED's so you can't put them in incorrectly. No soldering necessary.
For the display pcb, take out the 2 nuts that hold it to the front panel and remove the jack that attaches it to the display driver pcb. Desolder all lamps on the display pcb and replace them with LED's(Ebay item #191021493534). The upper 5 uses 8V bipin LEDs and the lower 4 uses 15V bipin LEDs. There's no polarity on the LED's so you can't put them in incorrectly. However, be careful when you solder them in place so you that you don't damage the printed circuit and the LEDs by overheating them or applying too much pressure. Reinsert the pcb and attach the connector to the display driver pcb.
With the upper cover and the front panel off, test and make all LED's are working. If they are working fine. put the unit back together! The front panel is way cooler now and way brighter than the original lamps! Cheers!
The MC2255 uses 4 bayonet type lamps (Ebay item #191021243889) to backlight the front panel. To replace them, just take the front panel assembly off and take out the old bayonet lamps and replace them with the LED's. There's no polarity on the LEDs so you can't put them in incorrectly. No soldering necessary.
To replace the other lamps, take out the upper cover by removing six screws that hold the cover assembly. For The VU meters, it uses 8 multidirectional wedge LED's (Ebay item #201013201462). You need to pry the 2 white clips that hold the display pcb above the VU meters. Then pull up the pcb and take the wedge lamps out of the socket and replace them with LED's. There's no polarity on the LED's so you can't put them in incorrectly. No soldering necessary.
For the display pcb, take out the 2 nuts that hold it to the front panel and remove the jack that attaches it to the display driver pcb. Desolder all lamps on the display pcb and replace them with LED's(Ebay item #191021493534). The upper 5 uses 8V bipin LEDs and the lower 4 uses 15V bipin LEDs. There's no polarity on the LED's so you can't put them in incorrectly. However, be careful when you solder them in place so you that you don't damage the printed circuit and the LEDs by overheating them or applying too much pressure. Reinsert the pcb and attach the connector to the display driver pcb.
With the upper cover and the front panel off, test and make all LED's are working. If they are working fine. put the unit back together! The front panel is way cooler now and way brighter than the original lamps! Cheers!