Crown Com-Tech CT-400 Wartungshandbuch PDF herunterladen (Seite 11)

Com-Tech 400 Amplifier Service Manual

Theory

NEGATIVE

LOW SIDE

OUTPUT

PNP STAGE

POSITIVE

LOW SIDE

OUTPUT

NPN STAGE

NEGATIVE

HIGH SIDE

OUTPUT

PNP STAGE

POSITIVE

HIGH SIDE

OUTPUT

NPN STAGE

HIGH SIDE

BIAS

SERVO

+LVA

-1

-LVA

-1

+VOLTAGE

TRANSLATOR

-VOLTAGE

TRANSLATOR

OUTPUT

DEVICE

EMULATION

PROTECTION

ERROR

AMP

VGSBGS

BALANCED

INPUTS

INVERTING

BRIDGE

BALANCE

LOW SIDE

BIAS

DIODE

STRING

-1

MAIN NEGATIVE FEEDBACK (NFb) LOOP

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

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 38 39

SERVICE MANUAL 1
Table of Contents 3
Introduction 4
Parts Information 5
Specifications 6
Overview 7
Features 7
Front End Operation 7
Voltage Amplification 8
Grounded Bridge Topology 8
General Information 12
Standard Initial Conditions 12
Test 1: DC Offset 12
Test 19: Clipping 15
Post Testing 15
Parts List (Non-Module) 16
Capacitors 28
Transistors 28
Switches 30
Resistors 35
Resistor Networks 36
Integrated Circuits 36
Miscellaneous 36

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