Sony MDX-C8970 Manuale utente

SERVICE MANUAL

MDX-C8970

SUPPLEMENT-1

File this supplement with the service manual.

US Model

Subject: Main/Display/Relay Boards Modification

CONTENTS

1. DISCRIMINATION .................................................... 2

2. DIAGRAMS

2-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 3

2-2. Schematic Diagram – MAIN Board (1/5) – .................. 5

2-3. Schematic Diagram – MAIN Board (2/5) – .................. 6

2-4. Schematic Diagram – MAIN Board (3/5) – .................. 7

2-5. Schematic Diagram – MAIN Board (4/5) – .................. 8

2-6. Schematic Diagram – MAIN Board (5/5) – .................. 9

2-7. Printed Wiring Board

– MAIN Board (Component Side) – .............................. 10

2-8. Printed Wiring Board

– MAIN Board (Conductor Side) – ................................ 11

2-9. Printed Wiring Board – DISPLAY Board – ................. 12

2-10. Schematic Diagram – DISPLAY Board – ..................... 13

2-11. Printed Wiring Board – RELAY Board – ...................... 14

2-12. Schematic Diagram – RELAY Board –......................... 15

3. ELECTRICAL PARTS LIST ............................... 16

(ECN-CSB00896)

1. DISCRIMINATION

Former :1-674-589-11

New :1-674-589-12

Former :1-674-590-11

New :1-674-590-12

Former :1-674-591-11

New :1-674-591-1

– MAIN BOARD (Component Side) –

– RELAY BOARD (Component Side) –

– DISPLAY BOARD (Conductor Side) –

2. DIAGRAMS

2-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

(In addition to this, the necessary note is printed in each block)

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolytics

and tantalums.

• All resistors are in Ωand 1/4W or less unless otherwise

specified.

•f: internal component.

•C: panel designation.

Note on Printed Wiring Boards:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•f: internal component.

•b: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated)

•U: B+ Line.

• Powervoltageisdc 14.4Vandfedwithregulated dcpower

supply from ACC and BATT cords.

• Voltages aretakenwith aVOM(Input impedance10 MΩ).

Voltage variations may be noted due to normal produc-

tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-

tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F: FM

f: AM

E: MD

Note: The components identified by mark 0or dotted line

with mark 0are critical for safety.

Replace only with part number specified.

Caution:

Pattern face side: Partsonthepatternfacesideseen from

(Conductor Side) the pattern face are indicated.

Parts face side: Parts on the parts face side seen from

(Component Side) the parts face are indicated.

MDX-C8970

2-2. SCHEMATIC DIAGRAM – MAIN Board (1/5) –

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

(Page 9)

(Page 7)

(Page 8)

(Page 6)

MDX-C8970

2-3. SCHEMATIC DIAGRAM – MAIN Board (2/5) –

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

(Page

(Page 7)

(Page 8)

MDX-C8970

2-4. SCHEMATIC DIAGRAM – MAIN Board (3/5) –

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

( ) : AM

〈〈 〉〉 : MD PLAY

(Page 9)

(Page 5)

(Page 9)

(Page 6)

(Page

MDX-C8970

2-5. SCHEMATIC DIAGRAM – MAIN Board (4/5) –

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

〈〈 〉〉 : MD PLAY

(Page 5)

(Page

(Page 6)

(Page 15)

MDX-C8970

2-6. SCHEMATIC DIAGRAM – MAIN Board (5/5) –

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

( ) : AM

〈〈 〉〉 : MD PLAY

(Page 7)

(Page 5)

1010

MDX-C8970

D701 H-11

IC151 E-3

IC271 C-13

IC300 H-6

IC404 E-10

IC421 E-12

IC500 J-6

IC506 H-5

IC507 J-8

IC602 D-7

IC632 D-6

IC691 G-8

IC701 H-12

IC702 J-11

Q131 I-2

Q132 I-2

Q133 G-1

Q180 B-2

Q181 B-2

Q182 C-2

Q183 C-2

Q185 D-3

Q251 J-9

Q253 I-9

Q254 J-10

Q255 J-9

Q256 J-9

Q271 C-13

Q272 C-12

Q275 B-13

Q421 D-11

Q422 D-11

Q423 E-11

Q424 E-11

Q441 F-9

Q451 D-10

Q461 D-9

Q462 E-10

Q471 C-8

Q472 D-8

Q473 C-8

Q474 D-8

Q501 H-5

Q523 J-8

Q691 G-8

Q751 F-2

Q752 G-2

D2O4 J-11

D251 K-12

D252 K-12

D253 K-12

D254 K-11

D255 K-13

D256 K-13

D257 K-12

D258 K-12

D259 K-12

D260 K-12

D261 K-13

D262 K-11

D263 K-11

D264 K-11

D265 K-11

D271 D-13

D279 B-14

D280 A-14

D282 A-14

D283 B-13

D291 B-3

D421 E-11

D422 E-12

D423 D-12

D424 D-12

D441 E-9

D442 E-9

D461 C-10

D462 C-10

D463 C-10

D464 C-9

D466 C-9

D467 D-10

D468 D-9

D471 C-8

D472 D-8

D481 B-7

D482 B-7

D483 B-6

D484 B-6

D485 B-7

D486 B-8

D487 B-8

D488 B-8

D491 B-6

D546 K-3

D601 B-5

D631 B-4

D661 A-1

Ref. No. Location

• Semiconductor Location

2-7. PRINTED WIRING BOARD – MAIN Board (Component Side) –

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