Audio Discussion > CARVER

Sunfire Amp LED Modification

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TNRabbit:
I began the mod to put a RadioShack LED in place of the constantly burning out lamp in my Sunfire Cinema Seven Signature amplifier. 

LED values:

[size=85]Intensity: 350 mcd
Wavelength: 465-470 nm
Viewing angle: 154 degrees
FW current: 20 mA
FW supply: 3.2V (typical), 3.8V (max)[/size]



Used this site to calculate the resistor needed to match the LED up to the circuit (supposed to be 12 volts DC):

http://led.linear1.org/1led.wiz

TNRabbit:
Interesting; when I got the amp back apart & checked the voltage across the light nodes it read 14.78 volts DC; considerably MORE than Martin's measurement of 12.54 VDC.  I hope my 560 ohm resistors will be sufficient.....

Anywho; got it apart, modded, & back together in less than 30 minutes.  This is an EASY job if you know ANYTHING about desoldering/soldering a printed circuit board & have a decent tiny-tipped soldering gun.

Pics:

http://s251.photobucket.com/albums/gg286/TNRabbit/Audio/Sunfire%20LED%20modification/?start=all

TNRabbit:
Looks REALLY nice in the dark!!

TNRabbit:
Pic of the guts: 

Slim-Shaddy:
Very Nice!!

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