Sony CDXC-90 Service manual

CDX-C90

SERVICE MANUAL

Ver 1.1 2001. 08

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (US model)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION 19 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 1 % total harmonic distortion.

US Model

E Model

Model Name Using Similar Mechanism CDX-C680/C780 CD Drive Mechanism Type MG-363S-121 Optical Pick-up Name KSS-520A

Other specifications CD player section

System Compact disc digital audio

system Signal-to-noise ratio 108 dB Frequency response 5 - 20,000 Hz (±1 dB) Wow and flutter Below measurable limit Laser Diode Properties

Material GaAlAs Wavelength 780 nm Emission Duration Continuous Laser output power Less than 44.6 µW*

* This output is the value measured at a distance of

200 mm from the objective lens surface on the Optical Pick-up Block.

Tuner section

Tuning range FM tuning interval:

50 kHz/200 kHz switchable

87.5 - 108.0 MHz

(at 50 kHz step)

87.5 - 107.9 MHz

(at 200 kHz step) Antenna terminal External antenna connector Intermediate frequency 10.7 MHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz

50 dB at 200 kHz Signal-to-noise ratio 65 dB (stereo),

68 dB (mono) Harmonic distortion at 1 kHz

0.3% (stereo),

0.3% (mono) Separation 35 dB at 1 kHz Frequency response 20 - 15,000 Hz (±0.5 dB)

Tuning range AM tuning interval:

9 kHz/10 kHz switchable 531 - 1,602 kHz (at 9 kHz step) 530 - 1,710 kHz

(at 10 kHz step) Antenna terminal External antenna connector Intermediate frequency 10.71 MHz/450 kHz Sensitivity 30 dBµV

General

Outputs Digital output

Line outputs (3)

Power antenna relay

control lead

Power amplifier control

lead

Telephone ATT control

lead

Illumination control lead Tone controls Bass ±8 dB at 100 Hz

Treble ±8 dB at 10 kHz Power requirements 12 V DC car battery

(negative ground)

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FM/AM COMPACT DISC PLAYER

9-925-982-12

Sony Corporation

e Vehicle Company Shinagawa Tec Service Manual Production Group

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Dimensions Approx. 178 × 50 × 184 mm

(7 1/8 × 2 × 7 1/4 in.) (w/h/d)

Mounting dimension Approx. 182 × 53 × 163 mm

(7 1/4 × 2 1/8 × 6 1/2 in.)

(w/h/d) Mass Approx. 1.6 kg (3 lb. 8 oz.) Supplied accessories Parts for installation and

connections (1 set)

Rotary remote RM-X90 (1)

Wireless remote RM-X9 (1)

Front panel case (1)

Design and specifications are subject to change without notice.

SERVICE NOTE

CAUTION

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

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.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

NOTES ON PICK-UP FLEXIBLE BOARD

The pick-up flexible board in this set is secured to the optical pickup with an adhesive tape. Once the tape is removed, an adhering force becomes weak, and it cannot be reused. Therefore, if the optical pick-up is replaced, replace also the pickup flexible board with a new one.

NOTES ON CLEANING THE OBJECTIVE LENS

cotton swabs

optical pick-up

slide base

objective lens

2-axis actuato

2-axis cover

Apply CD lens cleaner B-4 (Part No.:J-2501-000-A) to cotton swabs (narrow type) (Part No.:J-2501-023-A) to be lightly wet. Use a force (about 5 g (0.18 oz)) to make the objective lens in contact with the bottom lightly, and clean the lens by spirals as following below. Replace the cotton swab and repeat this cleaning two or three times.

surface of objective lens

Notes:

Do not force to push the objective lens. Otherwise, the plate spring supporting the objective lens will be bent, causing a deteriorated RF waveform. Never touch anything other than the objective lens. Otherwise, a significant deterioration occurs in the RF waveform.

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 P ART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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TABLE OF CONTENTS

1. GENERAL

Initial settings .......................................................................... 4

Setting the clock ...................................................................... 5

Using the main panel controls ................................................. 6

Basic oprations ........................................................................ 7

Using the rotary remote ........................................................... 8

Using the wireless remote ....................................................... 9

Menu display/Lists ................................................................ 10

Listening to a CD/MD ...........................................................10

Playing tracks repeatedly....................................................... 11

Playing tracks in random order ............................................. 12

Creating a program ................................................................12

Labeling a CD ....................................................................... 14

Selecting specific tracks for playback ................................... 15

Locating a disc by name ........................................................16

Viewing CD TEXT information ............................................17

Customizing the CD sound.................................................... 18

Listening to radio................................................................... 18

Presetting radio stations......................................................... 19

Specifying monaural/stereo mode ......................................... 20

Receiving only the strongest signals ..................................... 21

Labeling radio stations .......................................................... 22

Selecting a station by name ................................................... 23

Adjusting the sound characteristics .......................................23

Setting the set up menu ......................................................... 24

Setting the display menu ....................................................... 25

Setting the function menu...................................................... 26

Selecting a surround menu .................................................... 26

Storing a surround effect for CDs ......................................... 27

Selecting the listening position.............................................. 28

Adjusting the cut-off frequency of the subwoofer(s) ............ 29

Adjusting the turn-over frequency of the bass and treble......30

Additional information .......................................................... 31

Connections ........................................................................... 33

3. ELECTRICAL ADJUSTMENTS

CD Section ............................................................................ 44

Tuner Section.........................................................................44

4. DIAGRAMS

4-1. IC Pin Descriptions ........................................................... 47

4-2. Block Diagram –CD Section–........................................... 57

4-3. Block Diagram –Main Section–........................................ 59

4-4. Block Diagram –Display Section–.................................... 61

4-5. Circuit Boards Location .................................................... 63

4-6. Printed Wiring Boards –CD Mechanism Section–............ 63

4-7. Schematic Diagram –CD Mechanism Section– ................ 67

4-8. Schematic Diagram –Audio Section– ............................... 72

4-9. Printed Wiring Board –Audio Section– ............................ 75

4-10. Schematic Diagram –Main Section (1/2)– ........................ 77

4-11. Schematic Diagram –Main Section (2/2)– ........................ 82

4-12. Printed Wiring Boards –Main Section– ............................ 87

5. EXPLODED VIEWS

5-1. Case Section ...................................................................... 96

5-2. Front Panel Section ........................................................... 97

5-3. Chassis Section ................................................................. 98

5-4. CD Mechanism Section (1) ............................................... 99

5-5. CD Mechanism Section (2) ............................................. 100

5-6. CD Mechanism Section (3) ............................................. 101

6. ELECTRICAL PARTS LIST ...................................... 102

2. DISASSEMBLY

2-1. Cover (Upper) ................................................................... 35

2-2. Front Panel Assy ............................................................... 35

2-3. Cords ................................................................................. 36

2-4. Rear Panel ......................................................................... 36

2-5. MD Assy ........................................................................... 37

2-6. Audio Board ...................................................................... 37

2-7. Bracket (MD) .................................................................... 38

2-8. Motor Block ...................................................................... 38

2-9. Base Panel Assy ................................................................ 39

2-10. Sub Panel Assy.................................................................. 39

2-11. Chassis (Front) Assy ......................................................... 40

2-12. Main Board ....................................................................... 40

2-13. Chassis (T) Sub Assy ........................................................ 41

2-14. Lever Assy......................................................................... 41

2-15. Servo Board....................................................................... 42

2-16. Roller Assy........................................................................ 42

2-17. Chassis (OP) (O/S) Assy ................................................... 43

2-18. Optical Pick-up Block ....................................................... 43

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SECTION 1

GENERAL

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