Sony WXC-5000 Service manual

WX-C5000

SERVICE MANUAL

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol ; are trademarks of Dolby Laboratories Licensing Corporation.

CD Section

TC Section

E Model

Model Name Using Similar Mechanism WX-C55 CD Drive Mechanism Type MG-378X-121 Optical Pick-up Name KSS-521A Model Name Using Similar Mechanism WX-C55 Tape Transport Mechanism Type MG-25E-136

CD player section

Signal-to-noise ratio 94 dB Frequency response 5 – 20,000 Hz Wow and flutter Below measurable limit

Cassette player section

Tape track 4-track 2-channel stereo Wow and flutter 0.08 % (WRMS) Frequency response 30 – 20,000 Hz Signal-to-noise ratio

Cassette type Dolby B NR Dolby NR off

TYPE II, IV 67 dB 58 dB TYPE I 64 dB 55 dB

SPECIFICATIONS

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) Aerial terminal External aerial connector Intermediate frequency 10.7 MHz Usable sensitivity 9 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),

68 dB (mono) Harmonic distortion at 1 kHz

0.7% (stereo),

0.4% (mono) Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz

– Continued on next page –

CHANGER CONTROL AUDIO MASTER

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) Aerial terminal External aerial connector Intermediate frequency 10.71 MHz/450 kHz Sensitivity 30 µV

Power amplifier section

Outputs Speaker outputs

(sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 45 W × 4 (at 4 ohms)

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.

General

Outputs Audio outputs (2)

Power aerial relay

control lead

Power amplifier control

lead Intputs Telephone ATT control

lead

Illumination control lead

Bus audio input connector

Bus control input Power requirements 12 V DC car battery

(negative ground) Dimensions Approx. 178 × 100 × 181 mm

(w/h/d) Mounting dimension Approx. 178 × 100 × 160 mm

(w/h/d) Mass Approx. 2.2 kg Supplied accessories Parts for installation and

connections (1 set)

Dummy cover (1)

Design and specifications are subject to change without notice.

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.

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.

TABLE OF CONTENTS

1. GENERAL

Location of Controls............................................................... 4

Getting Started........................................................................ 4

CD Player ............................................................................... 4

Cassette Player ....................................................................... 5

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

Other Functions ...................................................................... 5

CD/MD Unit ........................................................................... 6

Additional Information ........................................................... 7

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

2. DISASSEMBLY

2-1. Cover ................................................................................ 10

2-2. Front Panel Assy .............................................................. 10

2-3. CD Mechanism Block ...................................................... 11

2-4. TR Board, Heat Sink ........................................................ 11

2-5. CD Board ......................................................................... 12

2-6. Chassis (U) ....................................................................... 12

2-7. Tape Mechanism Block .................................................... 13

2-8. Main Board ...................................................................... 13

2-9. Chassis (TM) Assy ........................................................... 14

2-10. Sensor Board .................................................................... 14

2-11. Servo Board...................................................................... 15

2-12. Roller Assy....................................................................... 15

2-13. Chassis (OP) (O/S) Assy .................................................. 16

2-14. Optical Pick-up Block ...................................................... 16

3. ASSEMBLY OF MECHANISM DECK

3-1. Housing ............................................................................ 17

3-2. Arm (Suction)................................................................... 17

3-3. Lever (LDG-A)/(LDG-B) ................................................ 18

3-4. Gear (Loading FT) ........................................................... 18

3-5. Guide (C).......................................................................... 19

3-6. Capstan/Reel Motor (M904) ............................................ 19

4. MECHANICAL ADJUSTMENTS.............................. 20

5. ELECTRICAL ADJUSTMENTS

Tape Section ......................................................................... 21

Tuner Section........................................................................ 21

CD Section ........................................................................... 24

6. DIAGRAMS

6-1. IC Pin Descriptions .......................................................... 25

6-2. Block Diagram –CD Section–.......................................... 29

6-3. Block Diagram –Tape Section– ....................................... 30

6-4. Block Diagram –Main Section–....................................... 31

6-5. Circuit Boards Location ................................................... 32

6-6. Printed Wiring Boards –CD Mechanism Section–........... 33

6-7. Schematic Diagram –CD Mechanism Section (1/2)– ...... 34

6-8. Schematic Diagram –CD Mechanism Section (2/2)– ...... 35

6-9. Printed Wiring Board –TR Section– ................................ 36

6-10. Schematic Diagram –TR Section– ................................... 36

6-11. Printed Wiring Board –CD Section–................................ 36

6-12. Schematic Diagram –CD Section–................................... 37

6-13. Printed Wiring Board –Main Section– ............................. 38

6-14. Schematic Diagram –Main Section (1/4)– ....................... 40

6-15. Schematic Diagram –Main Section (2/4)– ....................... 41

6-16. Schematic Diagram –Main Section (3/4)– ....................... 42

6-17. Schematic Diagram –Main Section (4/4)– ....................... 43

6-18. Printed Wiring Board –Control Section– ......................... 44

6-19. Schematic Diagram –Control Section– ............................ 46

6-20. Printed Wiring Board –Jog Section–................................ 47

6-21. Schematic Diagram –Jog Section–................................... 47

7. EXPLODED VIEWS

7-1. Cover Section ................................................................... 53

7-2. Front Panel Section .......................................................... 54

7-3. Chassis Section ................................................................ 55

7-4. Tape Mechanism Section ................................................. 56

7-5. CD Mechanism Section (1) .............................................. 57

7-6. CD Mechanism Section (2) .............................................. 58

7-7. CD Mechanism Section (3) .............................................. 59

8. ELECTRICAL PARTS LIST ................................... 60

SECTION 1

GENERAL

This section extracted from instruction manual.

56789

SECTION 2

DISASSEMBLY

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

2-1. COVER

2 claws

1 PTT 2.6x5

3 cover

2-2. FRONT PANEL ASSY

1 PTT 2.6x5

3 claw

8 front panel assy

7 CN501

5 CN801

4 claw

6 CN500

2 PTT 2.6x5

2-3. CD MECHANISM BLOCK

5 bracket (CD)

4 PTT 2.6x5

3 CD mechanism block

2 CN802

1 PTT 2.6x5

2-4. TR BOARD, HEAT SINK

4 CN901

9 heat sink

8 PTT 2.6x12

3 TR board

5 PTT 2.6x12

7 PTT 2.6x12

6 PTT 2.6x12

1 PTT 2.6x10

2 cover (D/D converter)

2-5. CD BOARD

ground point screw

(PTT2.6x6)

3 ground point screw (PTT2.6x6)

1 CN803

2 CN402

5 CD board

6 insulating sheet (U)

2-6. CHASSIS (U)

4 chassis (U)

2 PTT 2.6x5

1 PTT 2.6x5

3 PTT 2.6x5

2-7. TAPE MECHANISM BLOCK

5 tape mechanism block

3 CN600

2 PTT 2.6x5

4 CN300

1 PTT 2.6x5

2-8. MAIN BOARD

ground point screw

(PTT2.6x6)

ground point screw

(PTT2.6x6)

3 MAIN board

4 insulating sheet (L)

2-9. CHASSIS (TM) ASSY

1 P 2x3

6 chassis (TM) assy

2 P 2x3

3 P 2x3

4 claw

5 CN4

2-10. SENSOR BOARD

1 claw

3 guide (DISC M)

2 claw

4 PS 2x3

5 SENSOR board

2-11. SERVO BOARD

loading motor assy

Removal the

two solders.

P 2x3

wires

CN3

PS 2x5

CN2

SERVO board

2-12. ROLLER ASSY

• When installing, take note of the positions arm (roller) and washers. (Fig. 1)

6 retaining ring (roller)

3 compression spring (RA-L)

8 PS 2x3

9 LOAD board

7 roller assy

4 washer

retaining ring (roller)

arm (roller)

5 arm (roller)

2 compression spring (RA-R)

arm (roller)

washer washer

Fig. 1

1 tension spring (RA-E)

2-13. CHASSIS (OP) (O/S) ASSY

8 compression spring (FL)

1 tension spring (KF8)

5 Turn loading ring in the

direction of the arrow.

6 chassis (OP) (O/S) assy

7 compression spring (FL)

4 Fit lever (D) in the

direction of the arrow.

2 damper (T)

2-14. OPTICAL PICK-UP BLOCK

1 P 2x3

2 sled motor assy

3 damper (T)

3 optical pick-up block

SECTION 3

ASSEMBLY OF MECHANISM DECK

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

3-1. HOUSING

4 Fit claw on B part.

3 Put the housing

under A part.

housing

5 Fit projection on C part.

2 Install the hanger onto

two claws of the housing.

7 Holder the hanger by bending the claw.

1 Install the catcher to the hanger.

hanger

6 Fit projection on D part.

C part

8 Hold the hanger by

bending the claw.

D part

3-2. ARM (SUCTION)

projection

A part

B part

2 Move the arm (suction) in the arrow

Direction and fit on projection.

1 Fit the arm (suction) on the shaft.

3-3. LEVER (LDG-A) / (LDG-B)

shaft A

1 Fit the lever (LDG-A) on

shafts A to C and install it.

3-4. GEAR (LOADING FT)

shaft B

shaft C

shaft A

shaft B

3 type-E stop ring 2.0

2 Fit the lever (LDG-B) on

shafts A and B and install it.

hole

4 Align hole in the gear (LDG-D)

with hole the lever (LDG-A).

2 tension spring (LD-2)

gear (LDG-D)

lever (LDG-A)

gear (LDG-FB)

5 gear (loading FT)

2 tension spring (LD-1)

6 polyethylene washer

3 Move the lever (LDG-B)

in the arrow direction.

3-5. GUIDE (C)

2 guide (C)

1 claws

3-6. CAPSTAN / REEL MOTOR (M904)

3 belt (25)

2 precision screws P 2x3

1 main motor assy

(CAPSTAN/REEL) (M904)

30°

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

1. Wipe the following components with an absorbent cotton cloth moistened with alcohol before adjustment :

PB head Pinch roller Idler Rubber belt Capstan

2. Demagnetize the PB head using a head demagnetizer.

3. Be careful not to use a magnetized screwdriver.

4. After the adjustment is completed, lock the adjustment parts using screws.

5. Unless otherwise specified, make adjustments at the specified voltage (14.4 V).

Torque Measurement

Mode Torque Meter Meter Reading

2.95 – 6.37 mN • m

FWD (30 – 65 g • cm)

CQ-102C FWD Back T ension

REV (30 – 65 g • cm)

CQ-102RC REV Back T ension

FF, REW CQ-201B (60 – 200 g • cm)

(0.42 – 0.90 oz • inch)

0.05 – 0.44 mN • m (0.5 – 4.5 g • cm)

(0.01 – 0.06 oz • inch)

2.95 – 6.37 mN • m

(0.42 – 0.90 oz • inch)

0.05 – 0.44 mN • m (0.5 – 4.5 g • cm)

(0.01 – 0.06 oz • inch)

5.89 – 19.61 mN • m

(0.83 – 2.78 oz • inch)

TEST MODE

This set have the test mode function. In the test mode, FM Auto Scan/Stop Level and AM Auto Scan/Stop Le vel adjustments can be performed easier than it in ordinary procedure.

1. Turn ON the regulated power supply to ACC and BATT terminals is “OFF” position (display 1:00).

2. Push the preset 4 button.

3. Push the preset 5 button.

4. Press the preset 1 button for more than two seconds.

5. Then the display and LED on the front panel indicates all lights, the test mode is set.

1. Push the OFF button.

T ape T ension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403A

REV CQ-403R

882.60 mN

(more than 90 g)

(more than 3.17 oz)

See the adjustment location from on page 23 for the adjustment.

TAPE SECTION

0 dB = 0.775 V

Tape Speed Adjustment

Procedure :

1. Put the set into the FWD PB mode.

test tape WS-48A (3 kHz, 0 dB)

set

AUDIO OUT REAR

frequency counter

10 kΩ

TUNER SECTION

0 dB = 1 µV

Cautions during repair

When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.

Note on Adjustment

The adjustments of tuner section, should be performed according to the following sequence.

1. FM Auto Scan/Stop Level Adjustment

2. FM Stereo Separation Adjustment

3. AM Auto Scan/Stop Level Adjustment

FM Auto Scan/Stop Level Adjustment

Setting :

SOURCE button : FM FREQUENCY SELECT switch : FM 200k

Specification : Constant speed

Frequency counter

3,010 to 3,030 Hz

Adjustment Location : Capstan motor internal volume

(See page 23)

DOLBY Level Adjustment

Setting :

Preset 3 (SHUF/;) button : Light down mark ;

(DOLBY OFF)

test tape P-4-D400 (400 Hz, 0 dB)

set

main board TP-L TP-R

level meter

Procedure :

1. Put the set into the FWD PB mode.

2. Adjust RV100 (L-CH) and RV200 (R-CH) on main board so that level meter reading is – 6 ± 0.5 dB (0.37 to 0.41 V).

Adjustment Location : See page 23.

FM RF signal

generator

antenna

0.01 µF

Carrier frequency : 97.9 MHz Output level : 22 dB (12.6 µV) Mode : mono Modulation : 1 kHz, 22.5 kHz deviation (30%)

terminal

Procedure :

1. Set to the test mode.

2. Push the SOURCE button and set to FM. Display

SHUF1

3. Push the preset 3 button. Display

PRESET

SHUF1

set

4. Adjust with the volume RV2 on TU1 so that the “FM”

indication turns to “2” indication on the display window. But, in case of already indicated “2”, turn the RV2 so that put out light “2” indication and adjustment.

Display

PRESET

SHUF1

Adjustment Location : See page 23.

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