Sony MT-MZR70-165, MZ-R90/R91 service manual Table Of Contents

TABLE OF CONTENTS

1.	SERVICING NOTE	4
2.	GENERAL	5
	Looking at the Controls	5
	Recording an MD Right Away!	6
	Playing an MD Right Away!	7
3.	DISASSEMBLY	8
3-1. Block Assy, Bottom		8
3-2. Panel Block Assy, Upper		8
3-3. LCD Module		9
3-4. Main Board		9
3-5. MD Mechanism Deck		10
3-6. Service Assy, OP		10
3-7. Holder Assy		11
3-8. Motor Flexible Board		11
3-9. Motor, DC (M602)		12
3-10. “Motor, DC (M601)”, “Motor, DC (M603)”		12
4.	TEST MODE	13
4-1. Outline		13
4-2. Test Mode		13
4-3. Manual Mode		14
4-4. Overall Adjustment Mode		15
4-5. Sound Skip Check Result Display Mode		16
4-6. Self-diagnosis Display Mode		17
4-7. Key Check Mode		19

5. ELECTRICAL ADJUSTMENTS	20
5-1. Outline	20
5-2. Precautions for Adjustment	20
5-3. Adjustment Sequence	20
5-4. NV Reset	20
5-5. Power Supply Manual Adjustment	20
5-6. Temperature Correction	22
5-7. Overall Adjustment Mode	22
5-8. Laser Power Check	23
6. DIAGRAMS	25
6-1. Block Diagram – MD Section –	25
6-2. Block Diagram – Audio Section –	27
6-3. Block Diagram – Power Supply Section –	29
6-4. Printed Wiring Board – Main Board –	31
6-5. Schematic Diagram – Main Board (1/3) –	35
6-6. Schematic Diagram – Main Board (2/3) –	37
6-7. Schematic Diagram – Main Board (3/3) –	39
6-8. IC Block Diagrams	41
6-9. IC Pin Descriptions	44
7. EXPLODED VIEWS	51
7-1. Cabinet Section	51
7-2. Mechanism Deck Section	52
8. ELECTRICAL PARTS LIST	53

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