JVC M-L10 High Quality Service Manual

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• Chapter 1 Basic Circuits

1. Introduction

2. Basic Circuit Configuration of Power Amplifier and Its Problems

   1. Basic Circuit Configuration

   2. Problem of Power Supply

   3. Voltage Amplifier Section

   4. Relationship between Voltage Amplifier and Power Amplifier Stage

   5. Problem of Power Stage

   6. Problem when Speakers are Connected

3. Power Cascode Super – A Circuit

   1. Types of Power Cascode Circuits

   2. Features of Power Cascode Super – A Circuit

4. Other Features of M – L10

   1. Voltage Amplifier Stage

   2. Protector Circuits

   3. Large – Scale Power Meter

5. Closer to the Musical Truth

• Chapter 2 Operation of each Circuit

1. Voltage Amplifier Circuit

2. Super – A Bias Circuit

3. Power Amplifier Circuit

4. Limiter and Protector Circuits

5. Regulated Power Supply Circuit (for Predriver)

6. Primary Power Source Circuit

• Chapter 3 Hints on Servicing

1. Caution when Powering the Unit after Repair

2. How to Check Characteristics after Repair

   1. Re – Check and Re – Adjustment of Center Voltage

   2. Re – Adjustment of Idling Current

   3. Level Adjustment of Power Meter

   4. Signal Applying Test

   5. Frequency Response

   6. Check of Residual Noise and Hum Level

   7. Capacitive Load Test

   8. Running Test

3. How to Locate the Defective Stage

4. Hints on Other Checks

5. Detailed Service Hints when Power Stage is Damaged

6. How to Clean and Repair the Cabinet

   1. How to Clean

   2. How to Repair