Sony ZSD-55 Service manual

ZS-D55

SERVICE MANUAL

Ver 1.0 2000.07

TAPE Model Name Using Similar Mechanism NEW
Section T ape Transport Mechanism Type MF-ZSD55

CD
Section

AEP Model

UK Model

Tourist Model

Model Name Using Similar Mechanism ZS-D50
MD Mechanism Type CDM-2411AAA
Optical Pick-up Type DAX-01A2

CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW (This output is the value measured
at a distance of about 200 mm from the objective lens surface on the
optical pick-up block with 7 mm aperture.)

Spindle speed

200 r/min (rpm) to 500 r/min (rpm) (CLV)

Number of channels

2

Frequency response

20 - 20 000 Hz +0.5/–1.2 dB

Wow and flutter

Below measurable limit

Radio section

Frequency range

FM : 87.5 - 108 MHz
MW : 531 - 1602 kHz
LM : 153 - 279 kHz

IF

FM : 10.7 MHz
MW/LW : 450 kHz

Aerials

FM : Telescopic aerial
MW/LW : Built-in ferrite bar aeraial

SPECIFICATIONS

Cassette-corder section

Recording system

4-track 2 channel stereo

Fast winding time

Approx. 112 s (sec.) with Sony cassette C-60

Frequency response

TYPE I (normal): 50 - 15 000 Hz

General

Speaker

Full range: 8 cm (3 1⁄4 in.) dia., 12 Ω,
cone type x 2

Input

LINE IN jack (stereo minijack)
Minimum input level 138 mV

Outputs

Headphones jack (stereo minijack)

For 8 - 32 Ω impedance headphones

LINE OUT jack (stereo minijack)

Rated output level 138 mV at load impedance
47 kΩ

OPTICAL DIGITAL OUT (CD) (optical output connector)

Wavelength: 630 - 690 nm

Maximum power output

5 W + 5 W

– Continued on page 2 –

PERSONAL AUDIO SYSTEM

Power requirements

For personal audio system:
230V AC, 50 Hz
12 V DC, 8 R20 (size D) batteries

For memory back-up:
6 V DC, 4 R6 (size AA) batteries

For remote control:
3 V DC, 2 R6 (size AA) batteries

Power consumption

AC 20 W

Battery life

For personal audio system

FM recording

Sony R20P: approx. 6 h
Sony alkaline LR20: approx. 12 h

Tape playback

Sony R20P: approx. 3 h
Sony alkaline LR20: approx. 6 h

CD playback

Sony R20P: approx. 1.5 h
Sony alkaline LR20: approx. 3 h

Dimensions (incl. projecting parts)
Approx. 486 x 244 x 177 mm (w/h/d)

(17 1⁄10 x 9 3⁄5 x 6 9⁄10 inches)

Mass (incl. batteries)

Approx. 6.2 kg (13 lb. 11 oz)

Supplied accessories

Mainns Lead (1)
Remote control (1)

Design and specifications are subject to change without notice.

TABLE OF CONTENTS

Specifications ........................................................................... 1

1. SERVICE NOTE........................................................... 3

2. GENERAL ...................................................................... 4

3. DISASSEMBLY

3-1. Cabinet Rear ASSY, Cabinet Front ASSY ................ 6

3-2. Power Board, P/T In Board, P/T Out Board,

BATT S Board........................................................... 7

3-3. Tuner Board .............................................................. 7

3-4. Jack Board................................................................. 7

3-5. Audio Board .............................................................. 8

3-6. CD Board .................................................................. 8

3-7. TC Board................................................................... 9

3-8. Cabinet Top ASSY .................................................... 9

3-9. H/P Board ................................................................ 10

3-10.TC/M Board ............................................................ 10

3-11.MD Block ASSY......................................................11

3-12.TC LED (L) Board, TC LED (R) Board,

TC Key Board .......................................................... 11

3-13.TC RF Board, Head Relay Board, Belt FR,

Belt BR, Capstan/Reel Motor (M691) .................... 12

3-14.CD Chassis ASSY ................................................... 12

3-15. CD Block Section ................................................... 13

3-16. Loading Board ........................................................ 13

3-17. “Tray ASSY, CD” ................................................... 14

3-18. Optical Pick-up Block, Pick-up Relay Board ......... 14

3-19. Panel DECO ASSY ................................................ 15

3-20.Control Board, JOG LED1 Board,

JOG LED2 Board.................................................... 15

3-21. Key Board............................................................... 16

3-22. BATT Board ........................................................... 16

4. TEST MODE................................................................ 17

5. ADJUSTMENTS

5-1. Mechanical Adjustmens............................................ 18

5-2. Electrical Adjustments.............................................. 19

6. DIAGRAMS

6-1. Explanation of IC Terminals................................... 22

6-2. Block Diagrams (Tape, Main Section) ................... 24

6-3. Block Diagrams (Tuner, CD Section) .................... 27

6-4. Printed Wiring Boards (Main Section)................... 31

6-5. Schematic Diagram (Main Section) ....................... 35

6-6. Schematic Diagram (CD Section) .......................... 39

6-7. Printed Wiring Boards (CD Section)...................... 43

6-8. Printed Wiring Boards (Contorl Section) ............... 45

6-9. Schematic Diagram (Control Section).................... 47

6-10. Printed Wiring Boards (Tuner Section) .................. 51

6-11. Schematic Diagram (Tuner Section) ...................... 52

7. EXPLODED VIEWS

7-1. Rear Cabinet Section ................................................ 60

7-2. Front Cabinet Section ............................................... 61

7-3. CD Block Section ..................................................... 62

7-4. Top Cabinet Section.................................................. 63

7-5. Mechanism Deck Section (1/2) ................................ 64

7-6. Mechanism Deck Section (2/2) ............................... 65

7-7. CD Section................................................................ 66

7-8. Optical Pick-up Section ............................................ 67

8. ELECTRICAL PARTS LIST................................... 68

– 2 –

SECTION 1

SERVICE NOTE

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 more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

1. Close the tray for CD.

2. Press CD u button.

3. Confirm the laser diode emission while observing the objecting
lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.

CAUTION DURING WHEN MOUNTING THE PULLEY
FOR THE LOADING MOTOR

Make the following adjustment when mounting the loading motor
(part number : 1-698-999-11) and motor pulley (part number : 2­627-174-01) of the CD section.

Specification : A = 0.9 to 1.1mm

– 3 –

LOCATION AND FUNCTION OF CONTROLS

FRONT PANEL : CD/RADIO/TAPE section

qf
qd

qs
qa

0

SECTION 2

GENERAL

12 34

5

6
7

8
9

1 Tape operation buttons

z/X (REC/REC P AUSE)
m, M (FF/REW, AMS)
x (STOP)
b, B (PLAY)

2 Cassette lid
3 Z PUSH OPEN/CLOSE

FRONT PANEL: TIMER/COM section

e;

wl

wk
wj

wh

4 COUNTER RESET button
5 DIR MODE button
6 JOG dial
7 Z CD OPEN/CLOSE button
8 Radio operation buttons

Tune – m, M +

9 CD tray

qgqh qj qk qlw;wa

0 AUTO PRESET button
qa CANCEL button
qs CD DUB button
qd CD operation buttons

u (PLA Y/PAUSE)
x (STOP)

qf BAND button

ws
wd

wf
wg

qg STANDBY button
qh OPR/BATT indicator
qj Display window
qk DISPLAY button
ql Remote control receiver
w; CLOCK button
wa VOL +, – buttons
ws MEGA BASS button

wd MODE buttion
wf ENTER MEM button
wg TIMER button
wh SLEEP button
wj MD(LINE) button
wk SOUND button
wl POWER button
e; i (Headphones) jack (stereo mini jack)

– 4 –

REAR PANEL

ea es ed ef eg eh ej

ea LINE OUT jack
es LINE IN jack
ed OPTICAL DIGITAL OUT(CD) jack
ef OPTICAL DIGITAL OUT(CD) jack cover socket
eg FM telescopic antenna
eh AC IN - jack
ej Battery compartment

Remote commander

1

2

3

4

5

6

7

8

9
0

qa

1 FUNCTION button

Each time you pressed, the function changes in the order
CD – Tape – Radio – Line – CD

2 Z CD OPEN/CLOSE button
3 Number buttons
4 MODE button
5 Radio operation buttons

TUNE +, – button
BAND

6 CD operation buttons

., > (AMS/SEARCH)
N (PLAY)
X (P AUSE)
x (STOP)

7 Tape operation buttons

x (STOP)
b, B (PLAY)
z/X (REC/REC PAUSE)
m, M (FF/REW, AMS)

8 POWER button (AC only)

Active only when you use the set with AC power source.

9 MEGA BASS button
0 VOL +, – button
qa SOUND button

• • •

– 5 –

SECTION 3

4

DISASSEMBLY

z

The equipment can be remo ved using the f ollo wing pr ocedure .

< MAIN SECTION >

Cabinet Rear ASSY Power board, P/T in board, P/T out board, BATT S board

Set

Cabinet Front ASSY
BATT L board

< CD BLOCK SECTION >

CD block section

Note : Follo w the disassemb ly pr ocedure in the n umerical or der given.

“ Tray ASSY, CD ”
Loading board

<MAIN SECTION>

3-1. CABINET REAR ASSY, CABINET FRONT ASSY

Tuner board
Jack board

Audio board

Cabinet Top ASSY

CD chassis ASSY

Optical pick-up block, Pick-up relay board

CD board
TC board

Control board, JOG LED1 board, JOG LED2 board Key board

H/P board
TC/M board
MD block ASSY

TC key board, TC LED (L) board, TC LED (R) board
TC RF board, Head relay board, Belt FR, Belt BR, Motor (M691)

CD block section

Panel DECO ASSY

Cabinet front ASSY

Handle

3

Screws

+BVTP 3

5

4

×

14

2

Screws

+BVTP 3

1

×

10

3

Screws

+BVTP 3 × 1

Cabinet rear ASSY

– 6 –

3-2. POWER BOARD, P/T IN BOARD, P/T OUT BOARD , BATT S BOARD

Jack board

2

1

Claws

Cabinet front ASSY

Power board

2

1

Screws

+BVTP 3

×

10

4

3

7

5

6

Claw

P/T OUT board

3-3. TUNER BOARD

Tuner board

2

P/T IN board

BATT S board

Cabinet rear ASSY

3-4. JACK BOARD

1

Claws

Cabinet front ASSY

– 7 –

3-5. AUDIO BOARD

0

1

CNP310

1

CNP308

2

Wire parallel (FFC) (11core)

2

Wire parallel (FFC) (13core)

1

CNP305

4

1

1

CNP309

3

+BVTP 3

1

CNP311

CNP304

Screws

×

10

Audio board

3-6. CD BOARD

Cabinet front ASSY

1

Wire parallel (FFC) (21core)

1

Wire parallel (FFC) (13core)

4

2

Screws

+BVTP 3

CD board

3

CN701

×

1

Cabinet front ASSY

– 8 –

3

CN713

3-7. TC BOARD

0

0

2

TC board

1

Screws

+BVTP 3 × 1

3-8. CABINET TOP ASSY

Cabinet front ASSY

Cabinet top ASSY

3

Claws

4

2

1

CNP807

Screws

+BVTP 3

×

1

Cabinet front ASSY

– 9 –

3-9. H/P BOARD

0

Cabinet front ASSY

2

1

Screw

+BVTP 3 × 10

H/P board

3-10. TC/M BOARD

1

CNP808

3

Cabinet top ASSY

TC/M board

2

Screw

+BVTP 3 × 1

– 10 –

3-11. MD BLOCK ASSY

0

Y

Cabinet top

3

2

Screw

+BVTP 3

×

10

1

Screws

+B 3

3-12. TC LED (L) BOARD, TC LED (R) BOARD, TC KEY BOARD

MD block ASSY

2

Screws

+BVTP 3

×

8

×

1

Cabinet top ASS

3

Remove solder

TC key board

5

Screws

+P 2.6

1

Screws

+BVTP 3

Deck (B), bracket

6

4

×

8

3

2

×

10

TC LED (L) board

TC LED (R) board

Deck (A), bracket

4

2

Remove solder

5

Screws

+P 2.6

1

Screws

+BVTP 3

×

8

×

10

– 11 –

4

3-13. TC RF BOARD, HEAD RELAY BOARD, BELT FR, BELT BR, CAPSTAN/REEL MOTOR (M691)

TC RF board

8

Screws

3

7

Belt BR

5

Belt BR

6

Belt FR

Belt FR

4

Screw

Head relay board

1

Screws

2

Remove solder

3-14. CD CHASSIS ASSY

CD chassis ASSY

9

Capstan/reel motor (M691)

3

1

CNP301

MD block ASSY

2

Screws

+BVTP 3

×

1

Cabinet front ASSY

– 12 –

3-15. CD BLOCK SECTION

1

Screws

+BVTP 3

×

10

2

Chassis CD

< CD BLOCK SECTION >

3-16. LOADING BOARD

CD block section

1 Screws (+BV 3X10)

Loading board

2

CD block section

– 13 –

3-17. “ TRAY ASSY, CD ”

)

d

1 Screws
(+BV 3X10)

Cover (L), Side

Tray ASSY, CD

Slider (L)

Lid, CD

3 Screws (+BV 3X10)

Plate (L), Side

Loading chassis

2

4

6

5 Wire, Parallel (FFC) (21 core)

(CD board : CN711)

Slider (R)

4

3 Screws

(+BV 3X10)

Cover (R), Side

Plate (R), Side

2

1 Screws

(+BV 3X10

3-18. OPTICAL PICK-UP BLOCK, PICK-UP RELAY BOARD

2

Optical pick-up block

6

3

5

Claw

5

Tray (Top), CD

4 Wire, Parallel
(FFC) (21 core)

Pick-up relay boar

Claw

Tray (Bottom), CD

1 Screws (+B 2.6X8)

– 14 –

3-19. PANEL DECO ASSY

5

r

3

1

Screws

+P 2.6 × 10

2

Screws

+P 2 ×

Panel DECO ASSY

Cabinet front

3-20. CONTROL BOARD, JOG LED 1 BOARD, JOG LED 2 BOARD

Control board

2

CNP806

JPG LED 1 board

2

CNP805

5

Remove solder

6

Claw

7

4

7

3

+P 2.6 × 8

Screws

5

6

JPG LED 2 board

Remove solde

Claw

1

Dial JOG

Panel DECO sub ASSY

– 15 –

3-21. KEY BOARD

8

2

1

Screws

+P 2.6

Key board

×

3-22. BATT L BOARD

4

5

Panel DECO sub ASSY

2

1

Cabinet rear ASSY

Cover, wire

1

BATT L board

3

Screws

+PTPWH 3

×

10

Lid, Battery case

– 16 –

CD SECTION

7

606

5

4

e

1. Entering CD test mode

Connect power supply cord or insert dry batteries, short Test
point (TEST-1) on the key board. (You need a moment for the
short) (Power button is possible with both of ON or OFF to en­ter test mode).
The LCD display changes as in the diagram and the unit goes
into test mode.

SECTION 4

TEST MODE

z

RF LEVEL and jitter check

Test mode PLAY status

Connection Point : CD board (Conductor side)

[CD BOARD] (Conductor side)

TP(RF)

TP (RF)

oscilloscop

(AC range)

cd

MEGA BASS

h

When you press the u key , the CD rotates and when you press
theu key again, the CD plays (the track servo comes on) (but
no sound is issued).
Pressing the u key starts automatic adjustment and the value
changes, but ignore this value.

[KEY BOARD] (Conductor side)

R603

R60

R60

1

JW610

S618

R602

CN806

4

x

JW609

R

E C B

606

D602

x

Q603

JW

R60

TEST-1

D603

BAND

TEST-1

SHORT : TEST MODE
OPEN : NORMAL MODE

11

1-678-260-

(11)

PGM

JW741

(VC)

IC701

Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.7 – 1.1Vp-p.

VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns

RF level:

0.7–1.1 Vp-p

2. Exiting test mode

With the unit in test mode, when you press the POWER button
to OFF, power is off and test mode ends.

– 17 –