Static, left channel from B&K EX-4420

Is it possible that it is related to something as simple as a slo blow fuse?

Otherwise, is it worth repairing. I paid $400 a few years ago for it.

Thanks!

mendef12-01-2023 1:38am

Showing 2 responses by imhififan

imhififan Details Discussions Posts This discussion Message User 2,125 posts 12-03-2023 at 09:03pm Copy Comment URL Report Comment Edit Delete Schematics Page 3 is the schematic, the difference lies in the number of output devices between models. ST1400 2 Pair/Ch 105 W 8 ohms ST1400M 4 Pair MONO 150 W 8 ohms ST2020 3 Pair/Ch 150 W 8 ohms ST3030 3 Pair/Ch 200 W 8 ohms EX4420 5 Pair/Ch 200 W 8 ohms EX4420M 10 Pair MONO 250 W 8 ohms EX4430 4 Pair/Ch 200 W 8 ohms REF7450 5 Pair/Ch 200 W 8 ohms REF7420B 5 Pair/Ch 800 W 8 ohms REF7420M 10 Pair MONO 1000W 8 ohms
imhififan Details Discussions Posts This discussion Message User 2,125 posts 12-04-2023 at 06:23pm Copy Comment URL Report Comment Edit Delete There also a relay RL3, looks like it's a 12V DPDT relay with a coil resistance about 900Ω.

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