Sony CDXC-7050-X Service manual

CDX-C7000X/C7050X

SERVICE MANUAL

Ver 1.1 2000. 08

Photo: CDX-C7050X

• The tuner and CD sections have no adjustments.

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

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.

Other Specifications CD player section

System Compact disc digital audio

Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz 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 87.5 – 107.9 MHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz/450 kHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 66 dB (stereo),

Harmonic distortion at 1 kHz

Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz

Tuning range 530 – 1,710 kHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 µV

system

72 dB (mono)

0.6% (stereo),

0.3% (mono)

US Model

Model Name Using Similar Mechanism CDX-C5050X/C5055 CD Drive Mechanism Type MG-383Z-121//K Optical Pick-up Name KSS-720A

Power amplifier section

Outputs Speaker outputs

(sure seal connectors)

Speaker impedance 4 – 8 ohms Maximum power output 50 W × 4 (at 4 ohms)

General

Outputs Audio outputs

Power antenna relay control lead Power amplifier control lead Telephone ATT control lead

Tone controls Bass ±9 dB at 100 Hz

Treble ±9 dB at 10 kHz

Power requirements 12 V DC car battery

(negative ground)

Dimensions Approx. 178 × 50 × 183 mm

(7 1/8 × 2 × 7 1/4 in.) (w/h/d)

Mounting dimensions Approx. 182 × 53 × 162 mm

(7 1/4 × 2 1/8 × 6 1/2 in.)

(w/h/d) Mass Approx. 1.2 kg (2 lb. 10 oz.) Supplied accessories Parts for installation and

connections (1 set)

Front panel case (1)

Card remote commander RM-X91

Design and specifications are subject to change without notice.

FM/AM COMPACT DISC PLAYER

Ver 1.1 2000. 08

SERVICE NOTES

CAUTION

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

If the optical pick-up block is defective, please replace the whole optical pick-up block. Never turn the semi-fixed resistor located at the side of optical pick-up block.

optical pick-up bloc

semi-fixed resistor

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 Chip Component Replacement

• Never reuse a disconnected chip component.

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

aged by heat.

TABLE OF CONTENTS

1. GENERAL

Location of controls................................................................. 3

Getting Started......................................................................... 3

Setting the clock ...................................................................... 3

CD Player CD/MD Unit (optional) ......................................... 4

Radio ....................................................................................... 5

Other Functions ....................................................................... 6

TV/Video (optional) ................................................................ 7

Connections ............................................................................. 8

2. DISASSEMBLY

2-1. Sub Panel (CD) Assy.........................................................10

2-2. CD Mechanism Block ....................................................... 10

2-3. Main Board ....................................................................... 11

2-4. Heat Sink ...........................................................................11

2-5. Chassis (T) Sub Assy ........................................................ 12

2-6. Lever Section..................................................................... 12

2-7. Servo Board....................................................................... 13

2-8. Shaft Roller Assy .............................................................. 13

2-9. Floating Block Assy .......................................................... 14

2-10. Optical Pick-up Block ....................................................... 14

3. DIAGRAMS

3-1. IC Pin Descriptions ........................................................... 15

3-2. Block Diagram –CD Section–........................................... 21

3-3. Block Diagram –Tuner Section–....................................... 22

3-4. Block Diagram –Display Section–.................................... 23

3-5. Circuit Boards Location .................................................... 23

3-6. Printed Wiring Boards –CD Mechanism Section–............ 24

3-7. Schematic Diagram –CD Mechanism Section (1/2)– ....... 26

3-8. Schematic Diagram –CD Mechanism Section (2/2)– ....... 27

3-9. Schematic Diagram –Main Section (1/2)– ........................ 28

3-10. Schematic Diagram –Main Section (2/2)– ........................ 29

3-11. Printed Wiring Board –Main Section– .............................. 30

3-12. Printed Wiring Board –Relay Section– ............................. 31

3-13. Schematic Diagram –Relay Section–................................ 32

3-14. Schematic Diagram –Display Section–............................. 33

3-15. Printed Wiring Board –Display Section– .......................... 34

3-16. IC Block Diagrams............................................................ 35

4. EXPLODED VIEWS

4-1. Chassis Section ................................................................. 38

4-2. Front Panel Section ........................................................... 39

4-3. CD Mechanism Section (1) ............................................... 40

4-4. CD Mechanism Section (2) ............................................... 41

4-5. CD Mechanism Section (3) ............................................... 42

5. ELECTRICAL PARTS LIST ........................................ 43

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

SECTION 1

GENERAL

This section is extracted from instruction manual (CDX-C7050X).

45678910

SECTION 2

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

2-1. SUB PANEL (CD) ASSY

4 two claws

6 sub panel (CD) assy

2 PTT 2.6x6

2-2. CD MECHANISM BLOCK

5 CD mechanism block

2 PTT 2.6x6

3 claw

5 CNP800

1 PTT 2.6x6

7 bracket (CD)

6 PTT 2.6x6

4 CNP701

1 PTT 2.6x

7 heat sink

1 PTT 2.6x8

2 PTT 2.6x8

4 PTT 2.6x8

5 PTT 2.6x8

3 PTT 2.6x12

6 PTT 2.6x8

2-3. MAIN BOARD

5 PTT 2.6x6

6 MAIN board

4 PTT 2.6x6

3 PTT 2.6x

2 PTT 2.6x8

1 PTT 2.6x8

2-4. HEAT SINK

2-5. CHASSIS (T) SUB ASSY

2 P 2x3

3 P 2x3

1 Unsolder the

lead wires.

2-6. LEVER SECTION

4 chassis (T) sub assy

black red

white

4 claws

5 guide (disc)

6 lever (R)

3 tension spring (LR)

7 lever (L)

1 screw

2 DISC IN SW board

2-7. SERVO BOARD

7 PS 2x4

6 PS 2x4

3 Removal the solders.

4 P 2x3

5 loading motor assy

2-8. SHAFT ROLLER ASSY

• When installing, take note of the positions

arm (roller) and washers. (Fig. 1)

2 CN2

1 CN3

8 SERVO board

3 retaing ring (RA)

4 shaft retainer

shaft retainer

retaing ring (RA)

arm

washer

5 shaft roller assy

2 arm (roller)

Fig. 1

washer

arm

shaft retaine

1 tension spring (RA)

2-9. FLOATING BLOCK ASSY

7 compression spring (FL)

1 tension spring (KF1)

6 floating block assy

8 compression spring (FL)

4 Fit lever (D) in the

direction of the arrow.

5 Turn loading ring in the direction of the arrow.

3 damper (T)

2-10. OPTICAL PICK-UP BLOCK

1 P 2x3

2 sled motor assy

2 damper (T)

3 optical pick-up block

SECTION 3

DIAGRAMS

3-1. IC PIN DESCRIPTIONS

• IC501 CXD2598Q (DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)

Pin No. Pin Name I/O Pin Description

1 DVDD — Digital power supply pin 2 DVSS — Digital ground 3 SOUT O Servo brock serial data output (Not used.) 4 SOCK O Servo brock serial data read clock output (Not used.) 5 XOLT O Servo brock serial data latch output (Not used.) 6 SQSO O Sub Q 80 bit, PCM peak and level data output. CD TEXT data output 7 SQCK I Clock input from SQSO read output. 8 SCSY I Fixed at “L”.

9 SBSO O Serial output of sub-P to W. (Not used.) 10 EXCK I Clock input from SBSO read output. (Fixed at “L”) 11 XRST I System reset (“L”: Reset) 12 STSM I System mute input (Fixed at “L”) 13 DATA I Serial data input from CPU. 14 XLAT I Latch input from CPU. Latch serial data at the falling edge. 15 CLOK I Serial data transfer clock input from CPU. 16 SENS O SENS output for CPU. 17 SCLK I Clock input from SENS serial data read. 18 ATSK I/O Input/output for anti-shock. 19 WFCK O WFCK (Write Flame Clock) output (Not used.) 20 XUGF O XUGF output (Not used.) 21 XPCK O XPCK output (Not used.) 22 GFS O GFS output 23 C2PO O C2PO output (Not used.) 24 SCOR O “H” output at either detection, sub code sync S0 or S1. 25 C4M O 4.2336 MHz output (Not used.) 26 WDCK O Word clock output f=2Fs (Not used.) 27 COUT I/O Track number count signal input/output (Not used.) 28 MIRR I/O Mirror signal input/output (Not used.) 29 DVSS — Digital ground 30 DVDD — Digital power supply pin 31 DFCT I/O Diffect signal input/output (Not used.) 32 FOK I/O Focus OK signal input/output 33 PWM1 I External control input of spindle motor. 34 LOCK I/O Lock signal input/output 35 MDP O Servo control output of spindle motor. 36 SSTP I Disc most inner track detection signal input 37 FSTIO I/O 2/3 frequency division input/output of pins ih and ij. (Not used.) 38 SFDR O Sled drive output 39 SRDR O Sled drive output 40 TFDR O Tracking drive output 41 TRDR O Tracking drive output 42 FFDR O Focus drive output 43 FRDR O Focus drive output 44 DVDD — Digital power supply pin 45 DVSS — Digital ground 46 TEST I Test pin (Fixed at “L”.) 47 TES1 I Test pin (Fixed at “L”.) 48 XTSL I X’tal select input (“L”: 16.9344 MHz, “H”: 33.8688 MHz) 49 VC I Center voltage input 50 FE I Focus error signal input 51 SE I Sled error signal input

Pin No. Pin Name I/O Pin Description

52 TE I Tracking error signal input 53 CE I Center servo analog input 54 RFDC I RF signal input 55 ADIO O Test pin (Not used.) 56 AVSSO — Analog ground 57 IGEN I Constant current input from OP amplifier. 58 AVDDO — Analog ground 59 ASYO O EFM full-swing output (“L”: VSS, “H”: VDD) 60 ASYI I Asymmetry comparate voltage input 61 RFAC I EFM signal input 62 AVSS3 — Analog ground 63 CLTV I VCO control voltage input from master. 64 FILO O Filter output for master PLL (slave=digital PLL) 65 FILI I Filter input from master PLL. 66 PCO O Charge pump output for master PLL. 67 AVDD3 — Analog power supply pin 68 BIAS I Asymmetry circuit constant current input 69 VCTL I VCO2 control input from wideband EFM PLL. (Not used.) 70 V16M O VCO2 oscillator output for wideband EFM PLL. (Not used.) 71 VPCO O Charge pump output for wideband EFM PLL. (Not used.) 72 DVSS — Digital ground 73 MD2 I Digital out ON/OFF control input (“L”: OFF, “H”: ON) 74 DOUT O Digital out output 75 ASYE I Asymmetry circuit ON/OFF input (“L”: OFF, “H”: ON) 76 DVDD — Digital power supply pin 77 LRCK O D/A interface LR clock output (f=Fs) 78 LRCKI I D/A interface LR clock input 79 PCMD O D/A interface serial data output (2’s COMP, MSB fast) 80 PCMD I D/A interface serial data input (2’s COMP, MSB fast) 81 BCK O D/A interface bit clock output 82 BCKI I D/A interface bit clock input 83 EMPH O Emphasis ON/OFF signal output 84 EMPHI I Emphasis ON/OFF signal input (“H”: ON, “L”: OFF) 85 XVDD — Power supply for master clock. 86 XTAI I X’tal oscillator input from master clock (16.9344 MHz). 87 XTAO O X’tal oscillator output for master clock (16.9344 MHz). 88 XVSS — Ground pin for master clock. 89 AVDD1 — Analog power supply pin 90 AOUT1 O Lch analog output 91 AIN1 I Lch OPAMP input 92 LOUT1 O Lch LINE output 93 AVSS1 — Analog ground 94 AVSS2 — Analog ground 95 LOUT2 O Rch LINE output 96 AIN2 I Rch OPAMP input 97 AOUT2 O Rch analog output 98 AVDD2 — Analog power supply pin 99 RMUT O Rch “0” detect Flug (Not used.)

100 LMUT O Lch “0” detect Flug (Not used.)

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