Sony Ericsson CDX-M620 User Manual

CDX-M620/M670

SERVICE MANUAL

Ver 1.0 2001. 03

• The tuner and CD sections have no adjustments.

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (US MODEL)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

23.2 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 5% total harmonic distortion.

CD player section

Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz Wow and flutter Below measurable limit Laser Diode Properties (US model)

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 (US model)

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

AM (US model)

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

87.5 – 108.0 MHz (AEP, UK, E model)

72 dB (mono)

0.6% (stereo),

0.3% (mono)

FM/MW/LW COMPACT DISC PLAYER

US Model

CDX-M620/M670

AEP Model

UK Model

E Model

CDX-M670

Model Name Using Similar Mechanism CDX-M700R/M750 CD Drive Mechanism Type MG-383Z-121//K Optical Pick-up Name KSS-720A

MW/LW (AEP, UK, E model)

Tuning range MW: 531 – 1,602 kHz

LW: 153 – 279 kHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity MW: 30 µV

LW: 40 µV

Power amplifier section

Outputs Speaker outputs (sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 52 W × 4 (at 4 ohms)

General

Outputs Audio outputs (front/rear)

Subwoofer output (mono)

Power antenna relay

control lead (US model)

Power aerial relay

control lead (AEP, UK, E model)

Power amplifier control

lead

– Continued on next page –

FM/AM COMPACT DISC PLAYER

CDX-M620/M670

CDX-M670

9-873-505-11

Sony Corporation

Audio Entertainment Group General Engineering Dept.

CDX-M620/M670

Inputs Telephone ATT control

lead Illumination control lead BUS control input connector BUS audio input connector Antenna input connector (US model) Aerial input connector (AEP, UK, E model) AUX IN connector (US model)

T one controls Bass ±8 dB at 100 Hz

Treble ±8 dB at 10 Hz

Loudness +8 dB at 100 Hz

+2 dB at 10 Hz

Power requirements 12 V DC car battery

(negative earth)

Dimensions Approx. 178 × 50 × 182 mm

(w/h/d)

Mounting dimensions Approx. 182 × 53 × 160 mm

(w/h/d) Mass Approx. 1.5 kg Supplied accessories Parts for installation and

connections (1 set)

Front panel case (1)

Card remote commander

RM-X110 (US model)

RM-X111 (AEP, UK, E model)

Note

This unit cannot be connected to a digital preamplifier or an equalizer.

Design and specifications are subject to change without notice.

US model:

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

SERVICE NOTES

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.

AEP/UK model:

This label is located on the bottom of the chassis.

This label is located on the drive unit’s internal chassis.

When replacing the chassis (T) of mechanism deck which have the “CAUTION LABEL” attached, please be sure to put a new CAUTION LABEL (3-223-913-11) to the chassis (T).

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 P ARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

CDX-M620/M670

NOTE FOR THE OPENING OF THE FRONT PANEL

In this set, the front panel is lowered to below the bottom face when it is opened. When servicing the set, place it on a stand having a height of about 2 cm.

stand

TEST MODE

1. Turn on the power.

2. Push “4” on the card remote control for 2 sec.

3. Push “5” on the control for 2 sec.

4. Push “1” on the control for 2 sec. (The TEST MODE is entered.)

5. Push the “OPEN/CLOSE” switch on the control for 2 sec.

6. The front panel detouch position is set. (No display appears at this time.)

7. Turn off the power and disassemble the set.

1. GENERAL

........................................................................... 4

2. DISASSEMBLY

2-1. Front Panel Assy (Normal) ............................................... 16

2-2. Front Panel Assy (Inoperative) ......................................... 16

2-3. CD Mechanism Block, Flexible Board ............................. 16

2-4. Sub Panel (CD) Sub Assy ................................................. 17

2-5. Motor Block Assy, Cam (R) Assy ..................................... 17

2-6. Main Board ....................................................................... 18

2-7. Heat Sink ........................................................................... 18

2-8. Chassis (T) Sub Assy ........................................................ 19

2-9. Lever Section .................................................................... 19

2-10. Servo Board....................................................................... 20

2-11. Shaft Roller Assy............................................................... 20

2-12. Floating Block Assy ..........................................................21

2-13. Optical Pick-up Block ....................................................... 21

3. PHASE ALIGNMENT

3-1. Arm (A-L) Assy, Arm (B-L) Assy..................................... 22

3-2. Cam (L) ............................................................................. 22

3-3. Motor Block ...................................................................... 23

3-4. Alignment between Arm (A-L) Assy

and Arm (B-L) Assy .......................................................... 23

3-5. Arm (A-R) Assy, Arm (B-R) Assy .................................... 24

3-6. Cam (R) .............................................................................24

4. DIAGRAMS

4-1. IC Pin Descriptions ........................................................... 25

4-2. Circuit Boards Location .................................................... 33

4-3. Block Diagram –CD Section–........................................... 34

4-4. Block Diagram –Tuner Section–....................................... 35

4-5. Block Diagram –Display Section–.................................... 36

4-6. Printed Wiring Boards –CD Mechanism Section–............ 38

4-7. Schematic Diagram –CD Mechanism Section (1/2)– ....... 40

4-8. Schematic Diagram –CD Mechanism Section (2/2)– ....... 41

4-9. Printed Wiring Boards –Main Section– ............................ 42

4-10. Schematic Diagram –Main Section (1/4)– ........................44

4-11. Schematic Diagram –Main Section (2/4)– ........................ 45

4-12. Schematic Diagram –Main Section (3/4)– ........................46

4-13. Schematic Diagram –Main Section (4/4)– ........................47

4-14. Printed Wiring Board –Sub (CD) Section– .......................48

4-15. Schematic Diagram –Sub (CD) Section–.......................... 49

4-16. Printed Wiring Board –Key Section–................................ 50

4-17. Schematic Diagram –Key Section– .................................. 51

4-18. Printed Wiring Board –Display Section– ..........................52

4-19. Schematic Diagram –Display Section–............................. 53

5. EXPLODED VIEWS

5-1. Chassis Section ................................................................. 56

5-2. Cam Section ...................................................................... 57

5-3. Main Board Section .......................................................... 58

5-4. Front Panel (Key) Assy Section ........................................ 59

5-5. Front Panel (Dspl) Assy Section .......................................60

5-6. CD Mechanism Section (1) ............................................... 61

5-7. CD Mechanism Section (2) ............................................... 62

5-8. CD Mechanism Section (3) ............................................... 63

6. ELECTRICAL PARTS LIST ........................................ 64

CDX-M620/M670

US MODEL

SECTION 1

GENERAL

This section is extracted from instruction manual.

AEP, UK, E MODEL

US, AEP, UK, E MODEL

CDX-M620/M670

US MODEL

AEP, UK, E MODEL

CDX-M620/M670

US, AEP, UK, E MODEL

CDX-M620/M670

US MODEL Connection

CDX-M620/M670

AEP, UK, E MODEL Connection

CDX-M620/M670

15 15

CDX-M620/M670

SECTION 2

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

Front Panel Assy (Normal)

CD Mechanism Block, Front Panel (KEY) Assy

Front Panel Assy (Inoperative)

Sub Panel (CD) Sub Assy Motor Block Assy, Cam (R) Assy

Chassis (T) Sub Assy

Lever Section

Servo Board

Shaft Roller Assy Floating Block Assy

Optical Pick-up Block

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

2-1. FRONT PANEL ASSY (NORMAL)

Main Board

Heat Sink

2-2. FRONT PANEL ASSY (INOPERATIVE)

screw (panel)

front panel (DSPL) assy

flexible board

front panel (key) assy

(Take care not to pull the

flexible board excessively)

screw (panel)

Turn on the power and open the front panel.

screw (panel)

front panel (DSPL) assy

flexible board

front panel (key) assy (Take care not to pull the flexible board excessively)

stand

screw (panel)

2-3. CD MECHANISM BLOCK, FRONT PANEL (KEY) ASSY

bracket (CD)

CD mechanism block

PTT 2.6x4

PTT 2.6x6

CN401

front panel (key) assy

PTT 2.6x6

PTT 2.6x4

tension spring (flexible)

cover (flexible)

slider (flexible)

CN604

slider (flexible)

flexible board

Note: When installing

the flexible board, make the board slack

as illustrated.

1616

2-4. SUB PANEL (CD) SUB ASSY

PTT 2.6x6

claw

CN603

CDX-M620/M670

sub panel (CD) sub assy

2-5. MOTOR BLOCK ASSY, CAM (R) ASSY

Note : Install the motor block assy and cam (R) assy in this roder.

For phase alignment between cams (L) and (R), see page 22 and 24.

PTT 2.6x6

motor block assy

PTT 2.6x6

PTT 2.6 x6

cam (R) assy

claw

Note: Install the cam (R) assy wit the cam fully rotated in the direction of the arrow A.

CN602

CDX-M620/M670

2-6. MAIN BOARD

PTT 2.6x6

ground point

MAIN board

PTT 2.6x6

ground point

PTT 2.6x

2-7. HEAT SINK

PTT 2.6x6

heat sink

PTT 2.6x

PTT 2.6x6

PTT 2.6x10

2-8. CHASSIS (T) SUB ASSY

Unsolder the

lead wires.

P 2x3

black red

white

CDX-M620/M670

P 2x3

chassis (T) sub assy

2-9. LEVER SECTION

lever (R)

tension spring (LR)

lever (L)

guide (disc)

special screw

DISC IN SW board

claws

CDX-M620/M670

2-10. SERVO BOARD

special screws

Removal the solders.

P 2x3

loading motor assy

CN3

special screws

SERVO board

CN2

2-11. SHAFT ROLLER ASSY

retaing ring (RA)

shaft retainer (roller)

retaing ring (RA)

arm

washer

Fig. 1

shaft roller assy

arm (roller)

washer

arm

shaft retainer (roller)

tension spring (RA)

2-12. FLOATING BLOCK ASSY

compression spring (FL)

tension spring (KF1)

floating block assy

compression spring (FL)

Fit lever (D) in the

direction of the arrow.

CDX-M620/M670

Turn loading ring in the

direction of the arrow.

damper (T)

2-13. OPTICAL PICK-UP BLOCK

P 2x3

sled motor assy

shaft (feed) assy

P 2x3

damper (T)

spring (feed), plate

optical pick-up block

PICK-UP flexible boar

CDX-M620/M670

)

3-1. ARM (A-L) ASSY, ARM (B-L) ASSY

arm (A-L) assy

SECTION 3

PHASE ALIGNMENT

stop ring 1.5, type-E

arm (B-L) ass

3-2. CAM (L)

1 Move the arm (B-L) assy in the direction of the

arrow A and the arm (A-L) assy in the direction of the arrow B fully (full open state).

2 Align the hole (large) on the cam (L) with part C and

install the cam.

4 Turn the cam (L) clockwise and counterclockwise to

verify that both the arms are operated.

line

hole(large)

bracket (L) assy

stop ring 1.5, type-E

cam (L

arm (B-L) assy

arm (A-L) assy

3-3. MOTOR BLOCK

)

1 Turn the cam (L) and position the cam so that part A

does not touch the SWITCH board SW900.

SWITCH board

PTT 2.6x6

SW1001

SW1002

PTT 2.6x6

motor block

PTT 2.6x6

CDX-M620/M670

3-4. ALIGNMENT BETWEEN ARM (A-L) ASSY AND ARM (B-L) ASSY

1 Input 9V DC to the motor terminal until the cam (L)

stops rotating. Take care to avoid overload of the motor.

2 Verify that the arm (A-L) assy and arm (B-L) assy

are positioned as shown below (full open).

cam (L

motor

arm (B-L) assy

arm (A-L) assy

DC 9

GND

CDX-M620/M670

3-5. ARM (A-R) ASSY, ARM (B-R) ASSY

stop ring 1.5, type-E

arm (B-R) assy

arm (A-R) assy

stop ring 1.5, type-E

3-6. CAM (R)

1 Move the arm (B-R) assy in the direction of the

arrow A and the arm (A-R) assy in the direction of the arrow B fully (full open state).

2 Align the hole (large) on the cam (R) with part C and

install the cam.

4 Turn the cam (R) clockwise and counterclockwise to

verify that both the arms are operated.

line

hole(large)

bracket (R) ass

stop ring 1.5, type-E

cam (R)

arm (B-R) assy

damper, oil

screw (P 2x4)

arm (A-R) assy

+ 54 hidden pages

Sony Ericsson CDX-M620 User Manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

Front Panel Assy (Normal)

CD Mechanism Block, Front Panel (KEY) Assy

Front Panel Assy (Inoperative)

sub panel (CD) sub assy

MAIN board

heat sink

chassis (T) sub assy

SERVO board

shaft roller assy

floating block assy

optical pick-up block

PHASE ALIGNMENT

motor block

cam (R)