DIY - Change capacitors - Quad 405




Stereo Power Amplifier Quad 405




Schematic of quad 405

Free Download Service Manual




danger


QUAD 405 - 1981 - SERIAL 56582 - BOARD NUMBER M12368 ISS 10

The device is restored without making any changes to its design. It's a Excellent device whose Musicality is still at the top Today. This device Works with speakers Brand Elipson, 3 channels, bass reflex.

Great consistency of the stamps, the sound scene is ample and without aggressiveness of the treble. A quality vintage amplifier.

quad 405

quad 405 restoration

quad 405, old components

quad 405, old components

Results: The review was well needed.

The capacitors 100/16 and 47/40 were defective. One of the 2 capacitors of 10,000 UF was defective. If you look at the photograph, the top of the component is pierced. Imagine the change in the sound level!

quad 405 restoration

quad 405 restoration

quad 405 restoration

Film capacitors have Kept very close values. I changed them despite everything hoping to improve the sound restitution.

quad 405 restoration

quad 405 restoration, capacitor adaptator


Adaptation with printed circuit board on capacitors "SNAP-IN"
Adaptation for their fastenings with PVC plumbing pipe diameter 50.


quad 405 restoration



quad restoration

quad 405 restoration

quad 405 restoration

quad restoration

quad restoration
Download M12368-ISS9-10 Schematic

quad restoration - PCB MJ 12368 ISS 10

beware this pcb does not have the original plot


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