Mackie FR800/FR1400/FR2500 FR Series Owner's Manual - Page 17

Block Diagram OL INPUT A 2 BALANCED 1 LINE INPUT 3 (XLR-F) INPUT A BALANCED LINE INPUT (TRS) INPUT B BALANCED 1 2 LINE INPUT 3 (XLR-F) INPUT B BALANCED LINE INPUT (TRS) MONO STEREO BRIDGE AMP MODE SWITCH MONO STEREO BRIDGE BREAKER POWER SWITCH TOROIDAL POWER TRANSFORMER CHANNEL A LEVEL MONO STEREO BRIDGE CHANNEL B LEVEL POWER ON OFF SUBSONIC FILTER ON OFF FR SERIES BLOCK DIAGRAM 28.12.05 FUSE FUSE FUSE FUSE + VDC (CHANNEL A) - + VDC (CHANNEL B) - TEMP SENSOR (ON HEATSINK) HI DCV + LO DCV - SIG +VDC POWER AMPLIFIER ON OFF -VDC CLIP LIMITER PROTECTION DC OFFSET OVER TEMP SHORT CIRCUIT CURRENT LIMIT ON SIG +VDC OL OFF POWER AMPLIFIER -VDC FAN VARIABLE SPEED CONTROL FAN HI DCV LO DCV + - 1+ 1- 2- + - CHANNEL A 2+ SPEAKER OUT 1+ + 2- 1- - 2+ BRIDGED SPEAKER OUT 1+ 1- + 2- - CHANNEL B 2+ SPEAKER + OUT - FAN SPACEMAN Owner's Manual Owner's Manual 17