Sony MDX-C7900 Manual de usuario

SERVICE MANUAL

MDX-C7900

FM/AM MINIDISC PLAYER

MDX-C7900R

FM/MW/LW MINIDISC PLAYER

US Model

Canadian Model

E Model

MDX-C7900

AEP Model

UK Model

MDX-C7900R

Model Name Using Similar Mechanism NEW

Base Mechanism Type MG-164KT-138

Optical Pick-Up Name KMS-241A/J2N

SPECIFICATIONS

MDX-C7900/C7900R

Refer to RM-X4S Service Manual (9-925-

698-[][]) issued previously for information

ofremotecommander(RM-X4S)supplied

with this set. Photo: MDX-C7900

– Continued on next page –

9-925-787-12 Sony Corporation

2001H0500-1 e Vehicle Company

C2001.8 ShinagawaTec Service Manual Production Group

Ver 1.1 2001.08

– 2 –

TABLE OF CONTENTS

1. SERVICE NOTE....................................................... 3

2. GENERAL

Location of Controls (MDX-C7900).............................. 4

Location of Controls (MDX-C7900R) ........................... 5

Resetting the Unit ........................................................... 6

Detaching the Front Panel............................................... 6

Preparing the Rotary Commander .................................. 6

Setting the Clock ............................................................. 6

Installation (US, Canadian) ............................................ 7

Installation (AEP, UK, E) ............................................... 8

Connections ..................................................................... 10

3. DISASSEMBLY ......................................................... 13

4. ELECTRICAL ADJUSTMENTS

Test Mode ........................................................................ 18

MD Section ..................................................................... 18

Tuner Section .................................................................. 18

5. DIAGRAMS

5-1. Block Diagram – SERVO Section – ............................... 21

5-2. Block Diagram – MAIN Section – ................................. 23

5-3. Block Diagram

– DISPLAY/KEY CONTROL Section –........................ 25

5-4. Block Diagram

– BUS CONTROL/POWER SUPPLY Section – ........... 27

5-5. Printed Wiring Boards

– MECHANISM DECK Section – ................................. 29

5-6. Schematic Diagram

– MECHANISM DECK Section – ................................. 31

5-7. Schematic Diagram – MAIN Section –.......................... 35

5-8. Printed Wiring Board – MAIN Section – ....................... 39

5-9. Printed Wiring Board – PANEL Section – ..................... 43

5-10. Schematic Diagram – PANEL Section – ........................ 45

5-11. IC Pin Function Description ........................................... 55

6. EXPLODED VIEWS................................................ 64

7. ELECTRICAL PARTS LIST ............................... 68

Ver 1.1

– 3 –

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !

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.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK !OR DOTTED

LINE WITH MARK !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.

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous ra-

diation exposure.

SECTION 1

SERVICE NOTE

•Type A/B Discrimination

[MAIN BOARD] (Component Side)

IC700

MB90574PFV-G-113-BND (C7900R: Type A)

MB90574PFV-G-114-BND (C7900: Type A)

MB90F574PFV-G-113 (C7900R: Type B)

MB90F574PFV-G-114 (C7900: Type B)

– 4 –

SECTION 2

GENERAL

This section is extracted from

instruction manual.

– 5 –

– 6 –

– 7 –

– 8 –

– 9 –

– 10 –

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