Block Diagram - McIntosh MC302 Service Manual

BLOCK DIAGRAM

PG
INDICATOR
UNBALANCED
+
INPUT
AMP
LEFT INPUT MODE
POWER GUARD
SWITCH
+
-
BALANCED
AMP
INPUT
-
PG
INDICATOR
UNBALANCED
+
INPUT
AMP
RIGHT
INPUT MODE
POWER GUARD
SWITCH
+
-
BALANCED
AMP
INPUT
-
POWER DIFF
AMP
GUARD
CURRENT
SOURCE
DIFF
AMP
THERMAL
SENSORS
BALANCED
MUTE
ATTENUATOR
AMP
TURN ON
DELAY
POWER DIFF
AMP
GUARD
CURRENT
SOURCE
DIFF
AMP
THERMAL
SENSORS
BALANCED
MUTE
ATTENUATOR
AMP
TURN ON
DELAY
5
MC302
POSITIVE
CURRENT
LIMITER
+ +
+
VOLTAGE
PREDRIVER OUTPUT
AMP DRIVER
ThermalTrak
DC BIAS
-
- -
VOLTAGE
PREDRIVER
AMP DRIVER OUTPUT
NEGATIVE
CURRENT
LIMITER
AC Power
POSITIVE
CURRENT
LIMITER
+ +
+
VOLTAGE
PREDRIVER OUTPUT
AMP DRIVER
ThermalTrak
DC BIAS
-
- -
VOLTAGE
PREDRIVER
AMP DRIVER OUTPUT
NEGATIVE
CURRENT
LIMITER
VOLTAGE
RECTIFIER
LOG
AMP
METER
HOLD
SWITCH
NEGATIVE
FEEDBACK
POWER
CONTROL
LIGHTING
CONTROL
CONTROL
LOGIC
BACKUP
POWER SUPPLY
INRUSH
CURRENT MAIN RELAYS
LIMITER
VOLTAGE
RECTIFIER
LOG
AMP
METER
HOLD
SWITCH
NEGATIVE
FEEDBACK
6
DC
METER
AMP
LEFT
OUTPUT
8 ohm
OUTPUT
4 ohm
AUTO-
FORMER
2 ohm
com
DC
METER
AMP
RIGHT
OUTPUT
8 ohm
OUTPUT
4 ohm
AUTO-
FORMER
2 ohm
com