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SECTION 3

ELECTRICAL

CONTENTS

ONE POINT REPAIR GUIDE ................................................................................................................... 3-2

1. NO POWER ............................................................................................................................................ 3-2

2. NO BOOTING WHEN POWER ON THE SET ....................................................................................... 3-4

3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ..................................................................... 3-5

4. NO OPERATION OF MD ....................................................................................................................... 3-6

5. NO SOUND .......................................................................................................................................... 3-11

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE .................................................................. 3-16

1. POWER (SMPS) ................................................................................................................................... 3-16

2. μ-COM PART CHECK .......................................................................................................................... 3-20

3. IC101(M24C16) CHECK ....................................................................................................................... 3-20

4. FLD DISPLAY CHECK ......................................................................................................................... 3-21

5. PWM MODULATION CHECK .............................................................................................................. 3-22

6. POWER AMP PART CHECK ............................................................................................................... 3-24

7. TUNER / AUX FUNCTION CHECK ...................................................................................................... 3-25

8. TUNER FUNCTION CHECK ................................................................................................................ 3-26

CDP ELECTRICAL TROUBLESHOOTING GUIDE ....................................................................... 3-27

1. CD FUNCTION ..................................................................................................................................... 3-27

2. DOUBLE USB FUNCTION ................................................................................................................... 3-28

WAVEFORMS ............................................................................................................................................. 3-29

WIRING DIAGRAM ................................................................................................................................... 3-33

BLOCK DIAGRAMS ................................................................................................................................. 3-35

1. OVERALL BLOCK DIAGRAM .............................................................................................................. 3-35

2. SMPS BLOCK DIAGRAM..................................................................................................................... 3-37

CIRCUIT DIAGRAMS ............................................................................................................................... 3-39

1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-39

2. MAIN - DSP CIRCUIT DIAGRAM ......................................................................................................... 3-41

3. MAIN - MICOM CIRCUIT DIAGRAM .................................................................................................... 3-43

4. MAIN - AMP CIRCUIT DIAGRAM ........................................................................................................ 3-45

5. MAIN - SERVO CIRCUIT DIAGRAM ................................................................................................... 3-47

6. FRONT CIRCUIT DIAGRAM ................................................................................................................ 3-49

CIRCUIT VOLTAGE CHART ................................................................................................................. 3-51

PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-55

1. SMPS P.C.BOARD ............................................................................................................................... 3-55

2. MAIN P.C.BOARD ................................................................................................................................ 3-57

3. FRONT P.C.BOARD ............................................................................................................................. 3-59

3-1