Table Of Contents - Sony Walkman MZ-R900 Service Manual

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)(EIAJ
Batteries Stereo LP2
NH-14WM 21 23
nickel metal
hydride
rechargeable
battery 2)
LR6 (SG) 30 35
Sony alkaline
3)
dry battery
NH-14WM 53 60
nickel metal
hydride
rechargeable
battery 2)
+ 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)
(3 1 / 11 / 2 7 / in.)
8 16 8
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
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.
2
1)
)
LP4
26
38
66

TABLE OF CONTENTS

1. SERVICING NOTES
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
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
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.
............................................... 3
......................... 17
............................... 42