4-bus (output groups) with a main Stereo L/R mix and a 6x2 (or 10x2 in some versions) output matrix. Mono Input Facilities:
Repairing these older analog units typically involves addressing aging mechanical components and power supply issues. Soundcraft Spirit Live 4-2 Service Manual
Features high-quality "Ultra Mic Plus" preamps with switchable +48V phantom power. 4-bus (output groups) with a main Stereo L/R
Often caused by dust or oxidation. Restorations frequently require cleaning faders with isopropyl alcohol or applying silicon lubricant to potentiometers. Often caused by dust or oxidation
The use of 10 ohm fusible resistors on each PCB is common. If a module draws excess current, these resistors "blow" to protect the circuit. Check for short circuits, typically caused by IC failure or decoupling capacitors, if you find open circuits on the supply rails.
4-band configuration with two swept mid ranges and an 18dB/octave high-pass filter.