Harrison K 3000 power amplifier schematics

fabiodord · 15th March 2009, 02:34 PM

Hello Everybody,

I'm trying to repair an amplifier from Harrison (U.K.) it's a pretty old power amp....

The model it's K3000 it should be more or less 600W RMS at 4 ohms,

The power mosfet it looks like good .... I did't look at all....

I'd like to find the schematics because inside there's 4 little boards with smd components with the codes scratched.....

Probably 2 of those are for the vu meter and the others 2 are for the limiter... there's 7 multiturn potentiometer and others components.... I mean.. it's a pretty complicate...
I don't see the polarization stage for the power mos and probably it's inside those little boards.

If someone can help me I'll be glad to share the experience in this "mission impossible"....

tiefbassuebertr · 24th March 2010, 07:09 PM

Have you find a schematic in the meantime?

I need a schematic of the K4000 and have therefore start a thread:
Harrison type "K4000" (K 4000) MKII 2x1000W/4ohm
unfortunately without success

15th March 2009, 02:34 PM	#1
fabiodord diyAudio Member Join Date: Feb 2007 Location: Parma	Harrison K 3000 power amplifier schematics Hello Everybody, I'm trying to repair an amplifier from Harrison (U.K.) it's a pretty old power amp.... The model it's K3000 it should be more or less 600W RMS at 4 ohms, The power mosfet it looks like good .... I did't look at all.... I'd like to find the schematics because inside there's 4 little boards with smd components with the codes scratched..... Probably 2 of those are for the vu meter and the others 2 are for the limiter... there's 7 multiturn potentiometer and others components.... I mean.. it's a pretty complicate... I don't see the polarization stage for the power mos and probably it's inside those little boards. If someone can help me I'll be glad to share the experience in this "mission impossible"....

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24th March 2010, 07:09 PM	#2
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	Have you find a schematic in the meantime? I need a schematic of the K4000 and have therefore start a thread: Harrison type "K4000" (K 4000) MKII 2x1000W/4ohm unfortunately without success

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