Sony MZ-R900 service manual Table of Contents, Disassembly, Diagrams, Exploded Views

MZ-R900

3)Measured in accordance with the EIAJ(Electronic Industries Association of Japan) standard.

4)When using a 100% fully charged rechargeable battery.

5)When using a Sony LR6 (SG) “STAMINA” alkaline dry battery (produced in Japan).

When playing

(Unit: approx.hours)(EIAJ1))

Batteries	Stereo	LP2	LP4
NH-14WM	21	23	26
nickel metal
hydride
rechargeable
battery2)
LR6 (SG)	30	35	38
Sony alkaline
dry battery3)
NH-14WM	53	60	66
nickel metal
hydride
rechargeable
battery2)

+One LR6 (SG)3)

1)Measured in accordance with the EIAJ(Electronic Industries Association of Japan) standard.

2)When using a 100% fully charged rechargeable battery.

3)When using a Sony LR6 (SG) “STAMINA” alkaline dry battery (produced in Japan).

Dimensions

Approx. 78.9 ⋅	17.1 ⋅ 72.0 mm (w/h/d)
(31/8 ⋅ 11/16 ⋅	27/8 in.)

Mass

Approx. 110 g (3.9 oz) the recorder only

Supplied accessories AC power adaptor (1) Headphones/earphones with a remote control

(1)

Rechargeable battery (1) Dry battery case (1)

Rechargeable battery carrying case (1) Carrying pouch/carrying case with a belt clip (except U.S.A model) (1)

AC plug adaptor (World model only) (1) Optical cable (1)

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

	TABLE OF CONTENTS
1.	SERVICING NOTES	3
2.	GENERAL	4

3.DISASSEMBLY

3-1.	Disassembly Flow	5
3-2.	Panel Assy, Bottom	5
3-3.	Panel Assy, Upper Section	6
3-4.	“LCD Module”, “Panel Assy, Upper”	6
3-5.	MAIN Board Assy	7
3-6. “Case Assy, Battery”, “MAIN Board”		7
3-7.	Strip, Ornamental	8
3-8.	“MD Mechanism Deck (MT-MZR900-171)”,
	“Chassis Assy, Set”	8
3-9.	Service Assy, OP (LCX-4R)	9
3-10. Holder Assy		10
3-11. MOTOR FLEXIBLE Board		10
3-12. Motor, DC (Sled) (M602)		11
3-13. “Motor, DC (Spindle) (M601)”,
	“Motor, DC (Over Write Head UP/DOWN) (M603)	11
4.	TEST MODE	12
5.	ELECTRICAL ADJUSTMENTS	17

6.DIAGRAMS

6-1. Block Diagram –SERVO Section–		27
6-2.	Block Diagram –AUDIO Section–	28
6-3. Block Diagram –KEY CONTROL/DISPLAY/
	POWER SUPPLY Section–	29
6-4.	Printed Wiring Boards	30
6-5.	Schematic Diagram	31
6-6.	IC Pin Function Description	33

7.EXPLODED VIEWS

7-1.	Panel Section	39
7-2.	Chassis Section	40
7-3.	MD Mechanism Deck Section (MT-MZR900-171)	41
8.	ELECTRICAL PARTS LIST	42

Design and specifications are subject to change without notice.

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 PUB- LISHED 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.

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