McIntosh MC275

MC275
5 6
BLOCK DIAGRAM
12AT7
BUFFER
12AT7
BUFFER
12AX7A
INPUT
AMP
12AX7A
PHASE
INVERTER
POWER
SWITCH
CONTROL
LOGIC
POWER
CONTROL
5V
AUTO-OFF
SWITCH
L OUTPUT
+
+
+
_
INPUT
SWITCH
MODE
SWITCH
12AT7
BUFFER
12AT7
BUFFER
12AX7A
INPUT
AMP
12AX7A
PHASE
INVERTER
R OUTPUT
+
+
+
_
AUDIO
DETECTOR
12.6V
-225V 350V 480V 700V
12.6V
DC
-225V
DC
350V
DC
480V
DC
700V
DC
6.3VAC
L BALANCED
L UNBALANCED
R/MONO UNBALANCED
R/MONO BALANCED
12AX7A
BALANCED
AMP
12AX7A
BALANCED
AMP
POWER CTRL
OUTPUT
DRIVER
TUBE
LIGHTING