McIntosh MC225 Power Amplifier Schematic.pdf

I2BH7 I 285V R 19 -wv 22 K I W 22K IW J C 20 R 48 WVh- I00K IW R 520 vw 470 390V I V 6 7591 BV V 7 5 7 591 -I 4 - 8 I /390V rH- 390V YEL/WHT 8 V WQ 390 V (3) w R 51 -Vwv 22 K# T I M-220 A GRN/WHT GRN_ BRN/WHT ? BRN_ BLK/WHT J WHT ” -3= T 2 M - 220 B BLU BRN -;- o BRN/WHT o RED o, O CRN o- o GRN/WHT S o BLK/WHT BLU/WHT WHT 600 A/7 OUT PI *5% TOLERANCE RESISTORS A MATCHED TO WITHIN 1% -O COM -O GND 600 A/70. OUTPUT L 70.7 V (20i R 70.7 V (20 L 150 A R 150 A L 600 A R 600 A MONO 70.7V (I MONO 75 A MONO 300 A LOW IMPED OUTPUT 1 2 A 4 A 8 A (25 V) FOR MONO SWITCH IN 0 RESISTORS R 52,53,54, a 55 WERE NOT USED IN AMPLIFIERS BELOW- SERIAL NO. I59C0. RESISTORS R 56, 57,58,a 59 WERE NOT USED IN AMPLIFIERS BELOW SERIAL NO. I7IC6 CHOKES LI, 2,3, a 4 (2 2MH) WERE USED IN SERIES WITH THE 7591 PLATE LEADS IN AMPLIFIERS BELOW SERIAL NO I7IC6 390V 600 A/70.7 V OUTPUTS RIGHT OUTPUT 600 Jl/70.7V OUTPUT RECEPTICAL CONNECTIONS R 51 -AAA/i 22 K* OUTPUT CONNECT TO JUMPER. L 70.7V (2000.) I AND 7 R 70.7 V (200 A) 1 AND 8 L 150 A 1 AND 2 R 150 A 1 AND 4 L 600 A 2 AND 3 R 600 A 4 AND 5 MONO 70.7 V (100 0.1 1 AND 7 7 TO 8 MONO 75 A 1 AND 2 2 TO 4 MONO 300 A 2 AND 3 2 TO 4,3 TO 5 LOW IMPEDANCE MONO OUTPUT CONNECTIONS OUTPUT CONNECT TO JUMPER 2 A L COM. AND L 4 A R 4 A TO L 4 A 4 A L COM. AND L 8 A R 8 A TO L 8 A 8 O (2 5 V ) L COM. AND L 16 A R 16 A TO L 16 A *5% TOLERANCE RESISTORS A MATCHED TO WITHIN 1% RESISTORS R 52,53,54 , 8 55 WERE NOT USED IN AMPLIFIERS BELOW- SERIAL NO. I59C0. RESISTORS R 56,57,58,8 59 WERE NOT USED IN AMPLIFIERS BELOW SERIAL NO. I7IG6 CHOKES LI, 2,3.8 4 (22MH) WERE USED IN SERIES WITH THE 7591 PLATE LEADS IN AMPLIFIERS BELOW SERIAL NO I7IC6 FOR MONO OPERATION BE SURE TO PLACE MONO/STEREO SWITCH IN MONO POSITION. REVISIONS - 2 4 SCHEMATIC, MC - 225 * n-n-Uih- ORAWN *Y cyit *CAL* I MATERIAL ; DAT 6.19.61 RAWING NO SC 126 167 A