On power sources

•For use in your house: Use the AC power adaptor supplied with this recorder. Do not use any other AC power adaptor since it may cause the recorder to malfunction.

Polarity of the plug

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270 ˚C during repairing.

•Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering or unsoldering.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR

LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

MZ-RH910

 

TABLE OF CONTENTS

 

1.

SERVICING NOTES ...............................................

4

2.

GENERAL ...................................................................

5

3.DISASSEMBLY

3-1.

Disassembly Flow ...........................................................

6

3-2.

Case (Lower) Block .........................................................

6

3-3.

MAIN Board ....................................................................

7

3-4.

Panel (Upper) Section .....................................................

7

3-5.

Mechanism Deck (MT-MZNH900-181J) ........................

8

3-6.

Battery Case Block ..........................................................

8

3-7.

Gear (BSA), Gear (SB) ...................................................

9

3-8.

OP Service Assy ..............................................................

9

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 .....................................................................

10

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 Board (1/9) – ....................

25

6-5.

Schematic Diagram – MAIN Board (2/9) – ....................

26

6-6.

Schematic Diagram – MAIN Board (3/9) – ....................

27

6-7.

Schematic Diagram – MAIN Board (4/9) – ....................

28

6-8.

Schematic Diagram – MAIN Board (5/9) – ....................

29

6-9.

Schematic Diagram – MAIN Board (6/9) – ....................

30

6-10.

Schematic Diagram – MAIN Board (7/9) – ....................

31

6-11.

Schematic Diagram – MAIN Board (8/9) – ....................

32

6-12.

Schematic Diagram – MAIN Board (9/9) – ....................

33

6-13.

Printed Wiring Board

 

 

– MAIN Board (Component Side) – ...............................

34

6-14.

Printed Wiring Board

 

 

– MAIN Board (Conductor Side) – .................................

35

7.EXPLODED VIEWS

7-1.

Case (Lower) Section ......................................................

48

7-2.

Panel (Upper) Section .....................................................

49

7-3.

Chassis Section ................................................................

50

7-4.

Mechanism Deck Section (MT-MZNH900-181J) ...........

51

8.

ELECTRICAL PARTS LIST ................................

52

3