Crown Audio 1200 service manual Theory

Micro-Tech 1200 Amplifier Service Manual

Theory

					POSITIVE
			+VOLTAGE	+LVA	HIGH SIDE
			TRANSLATOR	-1	OUTPUT
					NPN STAGE
BGS		VGS	ERROR
			AMP
			OUTPUT		HIGH SIDE
BALANCED			DEVICE
	-1				BIAS
			EMULATION
INPUTS
					SERVO
			PROTECTION
				-LVA	NEGATIVE
			-VOLTAGE		HIGH SIDE
			TRANSLATOR	-1	OUTPUT
					PNP STAGE
				MAIN NEGATIVE FEEDBACK (NFb) LOOP
					POSITIVE
					LOW SIDE
					OUTPUT
					NPN STAGE
					LOW SIDE
				-1	BIAS
					DIODE
					STRING
					NEGATIVE
				INVERTING	LOW SIDE
				BRIDGE	OUTPUT
				BALANCE	PNP STAGE

Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown)

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