Sony cdx 4270 r service manual

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3 TABLE OF CONTENTS 1. GENERAL Location of controls ................................................................. 4 Getting Started ......................................................................... 4 Setting the clock ...................................................................... 4 CD Player ................................................................................ 4 Radio ....................................................................................... 5 RDS ......................................................................................... 5 Other Functions ....................................................................... 6 Connections ............................................................................. 8 2. DISASSEMBLY 2-1. Cover ................................................................................. 10 2-2. Front Panel Assy ............................................................... 10 2-3. Sub Panel (1) Assy ............................................................ 11 2-4. CD Mechanism Block ....................................................... 11 2-5. Main Board ....................................................................... 12 2-6. Heat Sink ........................................................................... 12 2-7. Chassis (T) Sub Assy ........................................................ 13 2-8. Lever Assy ......................................................................... 13 2-9. Servo Board ....................................................................... 14 2-10. Roller Assy ........................................................................ 14 2-11. Chassis (OP) (O/S) Assy ................................................... 15 2-12. Optical Pick-up Block ....................................................... 15 3. ELECTRICAL ADJUSTMENTS Tuner Section ......................................................................... 16 CD Section ............................................................................ 19 4. DIAGRAMS 4-1. IC Pin Description ............................................................. 20 4-2. Block Diagram ÐCD SectionÐ ........................................... 22 4-3. Block Diagram ÐTuner SectionÐ ....................................... 23 4-4. Block Diagram ÐDisplay SectionÐ .................................... 24 4-5. Circuit Boards Location .................................................... 25 4-6. Printed Wiring Boards ÐCD Mechanism SectionÐ ............ 26 4-7. Schematic Diagram ÐCD Mechanism SectionÐ ................ 27 4-8. Printed Wiring Board ÐMain SectionÐ .............................. 28 4-9. Schematic Diagram ÐMain Section (1/3)Ð ........................ 30 4-10. Schematic Diagram ÐMain Section (2/3)Ð ........................ 31 4-11. Schematic Diagram ÐMain Section (3/3)Ð ........................ 32 4-12. Schematic Diagram ÐDisplay SectionÐ ............................. 33 4-13. Printed Wiring Board ÐDisplay SectionÐ .......................... 34 5. EXPLODED VIEWS 5-1. Chassis Section ................................................................. 39 5-2. Front Panel Section ........................................................... 40 5-3. CD Mechanism Section (1) ............................................... 41 5-4. CD Mechanism Section (2) ............................................... 42 5-5. CD Mechanism Section (3) ............................................... 43 6. ELECTRICAL PARTS LIST ........................................ 44