Block Diagram - McIntosh MC275 Service Manual

BLOCK DIAGRAM

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