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MZ-NH700/NHF800
3
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL
Location of Controls........................................................ 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Case (Lower) Section ...................................................... 7
3-3. MAIN Board.................................................................... 7
3-4. Case (Upper) Section....................................................... 8
3-5. Mechanism Deck Section (MT-MZNH900-181),
MD Standard Pin ............................................................. 8
3-6. Set Chassis Assy .............................................................. 9
3-7. Gear (BSA), Gear (SB) ................................................... 9
3-8. Op Service Assy .............................................................. 10
3-9. DC Motor SSM18D/C-NP (Spindle) (M701),
DC Motor (Sled) (M702), DC Motor Unit
(Over Write Head Up/Down) (M703) ............................. 10
3-10. Holder Assy ..................................................................... 11
3-11. Position of Ferrite Core ................................................... 11
4. TEST MODE .............................................................. 12
5. ELECTRICAL ADJUSTMENTS ......................... 16
6. DIAGRAMS
6-1. Block Diagram –MD SERVO Section – ......................... 21
6-2. Block Diagram –AUDIO Section –................................. 22
6-3. Block Diagram –POWER SUPPLY Section – ................ 23
6-4. Schematic Diagram –MAIN Section (1/9) – ................... 25
6-5. Schematic Diagram –MAIN Section (2/9) – ................... 26
6-6. Schematic Diagram –MAIN Section (3/9) – ................... 27
6-7. Schematic Diagram –MAIN Section (4/9) – ................... 28
6-8. Schematic Diagram –MAIN Section (5/9) – ................... 29
6-9. Schematic Diagram –MAIN Section (6/9) – ................... 30
6-10. Schematic Diagram –MAIN Section (7/9) – ................... 31
6-11. Schematic Diagram –MAIN Section (8/9) – ................... 32
6-12. Schematic Diagram –MAIN Section (9/9) – ................... 33
6-13. Printed Wiring Board –MAIN Section (1/2) – ................ 34
6-14. Printed Wiring Board –MAIN Section (2/2) – ................ 35
7. EXPLODED VIEWS
7-1. Case (Lower) Section ...................................................... 47
7-2. Case (Upper) Section....................................................... 48
7-3. Chassis Section ................................................................ 49
7-4. Mechanism Deck Section (MT-MZNH900-181) ............ 50
6. ELECTRICAL PARTS LIST................................ 51
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