Sony ZS-D50 Service Manual
ZS-D50
SERVICE MANUAL
Ver 1.0 1999.01
TAPE Model Name Using Similar Mechanism NEW
Section T ape Transport Mechanism Type MF-ZSD50
CD
Section
AEP Model
UK Model
Tourist Model
Model Name Using Similar Mechanism ZS-M7
MD Mechanism Type CDM-2411AAA
Optical Pick-up Type DAX-11A
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 +1 / –1 dB
Wow and flutter
Below measurable limit
Radio section
Frequency range
FM 87.5 - 108 MHz
MW 531 - 1,602 kHz
LW 153 - 279 kHz
IF FM : 10.7 MHz
MW / LW : 450 kHz
Aerials FM : Telescopic aerial
MW / LW : Built-in ferrite bar aerial
SPECIFICATIONS
Cassette-corder Section
Recording System
4-track 2 channel stereo
Fast winding time
Approx. 130 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., 3 ohms, cone type x 2
Input
LINE IN jack (stereo minijack)
Minimum input level 250 mV
Outputs
Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
LINE OUT jack (stereo minijack)
Rated output level 250 mV at load impedance 47 kilohms
OPTICAL DIGITAL OUT (CD) (optical output connector)
Wavelength : 630 - 690 nm
Maximum power outputs
4.5 W + 4.5 W
– Continued on page 2 –
PERSONAL AUDIO SYSTEM
MICROFILM
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 commander :
3 V DC, 2 R6 (size AA) batteries
Power consumption
AC 27 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. 3h
Dimensions (incl. projecting parts)
Approx. 435 x 223 x 160 mm (w / h / d)
(17 1/4 x 8 7/8 x 6 1/8 inches)
Mass (incl. batteries)
approx. 4.3 kg (9 lb. 7 oz)
Supplied accessories
AC power cord (1)
Remote commander (1)
Plug adaptor (1) (UK)
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”, “Cabinet Sub ASSY, Front” ............ 6
3-2. Inlet Board, Power Board ........................................... 7
3-3. Battery (R) Board, Battery (L) Board......................... 7
3-4. Cabinet (Upper) ASSY ............................................... 7
3-5. Switch (1) Board......................................................... 8
3-6. Mechanism Deck ........................................................ 8
3-7. Line Board .................................................................. 8
3-8. Tuner Board ................................................................ 8
3-9. CD Block ASSY ......................................................... 9
3-10. Headphone Board ..................................................... 9
3-11. Switch (2) Board, LCD Board, Lamp Board.......... 10
3-12. Main Board, CD/System Board.............................. 10
3-13. CD Block Section ....................................................11
3-14. TC RF Board, Head Relay Board,
Belt (FR/BR), Motor (M691)..................................11
3-15. Tray ASSY, CD ....................................................... 12
3-16. Loading Board ........................................................ 12
3-17. Optical Pick-up Block, Pick-up Relay Board ......... 12
4. TEST MODE................................................................ 13
5. ADJUSTMENTS
5-1. Mechanical Adjustmens............................................ 14
5-2. Electrical Adjustments.............................................. 14
6. DIAGRAMS
6-1. Explanation of IC Terminals..................................... 18
6-2. Block Diagrams (Tape, Main Section) ..................... 20
6-3. Block Diagrams (Tuner, CD Section)....................... 23
6-4. Printed Wiring Boards (Main Section) ..................... 27
6-5. Schematic Diagram (Main Section) ......................... 31
6-6. Printed Wiring Boards (CD/System Section) ........... 36
6-7. Schematic Diagram (CD/System Section) ............... 41
6-8. Printed Wiring Boards (Tuner Section) .................... 46
6-9. Schematic Diagram (Tuner Section) ........................ 48
7. EXPLODED VIEWS
7-1. Rear Cabinet Section ................................................ 56
7-2. Front Cabinet Section ............................................... 57
7-3. CD Block Section ..................................................... 58
7-4. Mechanism Deck Section -1 ..................................... 59
7-5. Mechanism Deck Section -2 ..................................... 60
7-6. CD Section................................................................ 61
7-7. Optical Pick-up Section ............................................ 62
8. ELECTRICAL PARTS LIST................................... 63
– 2 –
SECTION 1
SER VICE NOTE
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
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
PART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
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 lid for CD.
2. Press CD ^ 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
SECTION 2
GENERAL
1 Tape operation buttons
r/P (REC/REC P AUSE)
0, ) (FF/REW, AMS)
p (STOP)
9, ( (PLAY)
2 Cassette lid
3 6 PUSH OPEN/CLOSE
4 DIR MODE button
5 COUNTER RESET button
FRONT PANEL: TIMER/COM section
6 EDIT button
7 CANCEL button
8 6 CD OPEN/CLOSE button
9 CD tray
!º CD operation buttons
=, + (AMS/SEARCH)
^ (PLAY/PAUSE)
p (STOP)
!¡ Radio operation buttons
RADIO BAND
PRESET +, –
!™ AUTO PRESET button
!£ MODE MONO/ST ISS button
!¢ STANDBY button
!∞ SLEEP button
!§ OPR/BATT indicator
!¶ OPERATE button
!• Remote control receiver
!ª Display window
@º DISPLAY button
@¡ VOL +, –
@™ SOUND button
@£ MEGA BASS button
@¢ ENTER/MEMORY CHECK button
@∞ MD(LINE) button
@§ Speaker
@¶ 2 (Headphones) jack (stereo mini jack)
@• TUNING TIME SET +, – button
@ª TIMER button
#º CLOCK button
– 4 –
REAR PANEL
#¡ Battery compartment
#™ FM telescopic antenna
#£ LINE IN jack
#¢ LINE OUT jack
#∞ OPTICAL DIGITAL OUT(CD) jack
#§ AC IN ⁄ jack
#¶ OPTICAL DIGITAL OUT(CD) jack cover socket
Remote commander
1
2
3
4
5
6
7
8
9
!º
!¡
1 FUNCTION button
Each time you pressed, the function changes in the order
CD – Tape – Radio – Line – CD
2 6 CD OPEN/CLOSE button
3 Number buttons
4 MODE button
5 Radio operation buttons
TUNE +, – button
BAND
6 CD operation buttons
=, + (AMS/SEARCH)
( (PLAY)
P (PAUSE)
p (STOP)
7 Tape operation buttons
p (STOP)
9, ( (PLAY)
r/P (REC/REC P AUSE)
0, ) (FF/REW, AMS)
8 OPERATE button (AC only)
Active only when you use the set with AC power source.
9 MEGA BASS button
!º VOL +, – button
!¡ SOUND button
• • •
– 5 –
SECTION 3
DISASSEMBLY
r
The equipment can be remo ved using the f ollo wing pr ocedure .
< MAIN BLOCK SECTION >
Set
Cabinet, Rear
Cabinet sub
ASSY, Front
Inlet board, Power board Battery (R) board, Battery (L) board
Cabinet (Upper) ASSY Switch (1) board Mechanism deck
Line board
Tuner board
CD block ASSY
Headphone board
Main board
CD block section
< MECHANISM DECK SECTION >
Mechanism deck
TC RF board, Head relay board, Belt (FR/BR), Motor (M691)
< CD BLOCK SECTION >
Tray ASSY, CD
Optical pick-up block, Pick-up relay board
CD block section
Loading board
Note : Follow the disassembly procedure in the numerical order given.
<MAIN BLOCK SECTION>
3-1. “CABINET, REAR”, “CABINET SUB ASSY, FRONT”
Cabinet sub ASSY, Front
Telescopic antenna
Switch (2) board, LCD board, Lamp board
CD/System board
4
Screws (+BV 3X12)
4
Screws (+BV 3X12)
Lid, Battery case
Handle
2
1
3
4
Screws (+BV 3X12)
5
Cabinet, Rear
– 6 –
3-2. INLET BOARD, POWER BOARD
e
)
1
Screws (+BV 3X10)
Power board
3
Screws
(+BV 3X10)
Inlet board
3-3. BATTERY (R) BOARD, BATTERY (L) BOARD
1
Claw
2
4
Cabinet, Rear
Battery (L) board
4
3
Bracket (2), Yok
Battery (R) board
3-4. CABINET (UPPER) ASSY
2
Cabinet (Upper) ASSY
2
Cabinet, Rear
1
Screws (+BV 3X10
Cabinet sub ASSY, Front
– 7 –
3-5. SWITCH (1) BOARD 3-6. MECHANISM DECK
Y
)
t
)
Switch (1) board
2
3-7. LINE BOARD
3
1
Screws (+BV 3X8)
Claw
Cabinet (Upper) ASS
1
Screws
(+BV 3X10)
Stopper, Wiring
2
Cabinet (Upper) ASSY
Damper
Mechanism deck
1
Screw
(+BV 3X10
Plate, Upper
1
Screws
(+BV 3X10)
3-8. TUNER BOARD
Line board
2
Bracket, Tuner
1
3
Cabinet sub ASSY, Fron
Claw
2
5
Screws (+BV 3X10)
Tuner board
Cabinet sub ASSY, Front
4
Screws (+BV 3X10
1
Wire, Parallel (FFC) (10 core)
(Main board : CN305)
– 8 –
3-9. CD BLOCK ASSY
)
Cabinet sub ASSY, Front
Headphone board
1
Screw (+BV 3X10)
2
2
Wire, Parallel (FFC) (30 core)
(CD/System board : CN801)
CD block ASSY
4
3
Screws (+BV 3X10)
1
Wire, Parallel (FFC) (13 core
(CD/System board : CN803)
3
Screws (+BV 3X10)
Cabinet sub ASSY, Front
3-10. HEADPHONE BOARD
– 9 –
3-11. SWITCH (2) BOARD, LCD BOARD, LAMP BOARD
)
Lamp board
Remove solder
6
Bracket, CD button
Bracket (2), CD
2
7
LCD board
LCD board
5
Switch (2) board
3
Screws (+P 2.6X6)
4
1
Screws (+BV 3X10)
Screws (+BVTP 2.6X10
3-12. MAIN BOARD, CD/SYSTEM BOARD
6
Screw (+BV 3X10)
5
Wire, Parallel (FFC) (21 core)
Bracket, CD
CD block section
Cabinet sub ASSY, Front
Main board
4
7
CD/System board
3
1
Wire, Parallel (FFC) (12 core)
2
Wire, Parallel (FFC) (20 core)
6
Screws (+BV 3X10)
Screws (+BV 3X10)
– 10 –
3-13. CD BLOCK SECTION
d
Bracket, CD
1
Wire (Flat type) (21core)
CD block section
3
2
Screws (+BV 3X10)
<MECHANISM DECK SECTION>
3-14. TC RF BOARD, HEAD RELAY BOARD, BELT (FR/BR), MOTOR (M691)
6
Belt FR
Main board
CD/System boar
TC RF board
1
Screws
2
Remove solder
8
Screws
3
9
Motor (M691)
5
7
Belt BR
4
Screw
Head relay board
– 11 –
<CD BLOCK SECTION>
)
d
3-15. TRAY ASSY, CD
1
Screws
(+BV 3X10)
Cover (L), Side
3
Screws (+BV 3X10)
2
4
Plate (L), Side
Loading chassis
Plate (R), Side
Tray ASSY, CD
3-16. LOADING BOARD
1
Screws (+BV 3X10)
Slider (L)
Lid, CD
6
5
Wire, Parallel (FFC) (21 core)
(CD/System board : CN701)
Slider (R)
3-17. OPTICAL PICK-UP BLOCK, PICK-UP RELAY BOARD
4
3
Screws
(+BV 3X10)
Cover (R), Side
2
Tray (Top), CD
1
Screws
(+BV 3X10
Loading board
CD block section
2
Optical pick-up block
Claw
– 12 –
5
2
6
3
5
1
Screws (+B 2.6X8)
4
Wire, Parallel
(FFC) (21 core)
Pick-up relay boar
Claw
Tray (Bottom), CD
SECTION 4
TEST MODE
CD SECTION
1. Entering CD test mode
With the OPERATE button OFF, short JW801 and JW802 on
the LCD board. (You need a moment for the short.)
The LCD display changes as in the diagram and the unit goes
into test mode.
cd
MEGA BASS
Í
When you press the ^ key, the CD rotates and when you press
the ^ key again, the CD plays (the track servo comes on)(but
no sound is issued).
Pressing the ^ key starts automatic adjustment and the value
changes, but this value is not a problem.
[LCD BOARD] (Conductor side)
ALL
SOUND
3. RF LEVEL and jitter check
Test mode PLAY status
Connection P oint : CD/System board (Conductor side)
oscilloscope
(AC range)
TP (RFO)
TP (VC)
CD TEST MODE
SHORT : TEST MODE
OPEN : NORMAL MODE
2. Exiting test mode
With the unit in test mode, when you press the OPERATE button to OFF, test mode ends.
Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.55 – 0.85Vp-p.
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
RF level:
0.55–0.85 Vp-p
– 13 –
SECTION 5
ADJUSTMENTS
4. TRAVERSE SIGNAL check
Connection P oint : CD/System board (Conductor side)
oscilloscope
(AC range)
TP (TO)
TP (VC)
Press the FF or FR from 3.
Check to see that the traverse signal level is between 200 to
400mVp-p.
0V
Note:
Extend the sweep time
for easier view.
A
200 – 400mVp-p
B
0V
5-1. MECHANICAL ADJUSTMENTS
TAPE RECORDER SECTION
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback/erase head pinch roller
rubber belts capstan
2. Demagnetize the record/playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.
Torque Measurement
Torque Torque Meter Meter Reading
Forward CQ-102C
Forward
Back Tension (0.028 to 0.083 oz • inch)
Reverse CQ-102RC
Reverse
Back Tension (0.028 to 0.083 oz • inch)
FF/REW CQ-201B
CQ-102C
CQ-102RC
T ape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
A
B
REV CQ-403A
36 to 61 g • cm
(0.5 to 0.84 oz • inch)
2 to 6 g • cm
36 to 61 g • cm
(0.5 to 0.84 oz • inch)
2 to 6 g • cm
61 to 143 g • cm
(0.85 to 1.98 oz • inch)
more than 100g
(more than 3.53 oz)
more than 100g
(more than 3.53 oz)
A = B
5. RELEASE THE TEST MODE
After completed with adjustment, press the OPERA TE button to
release the test mode.
5-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION 0dB = 0.775V
1. The adjustnemts should be performed in the order in the service
manual. (As a general rule playback circuit adjustment should
be completed beforeming recording circuit adjustment.)
2. The adjustments should be performed for bothe L-CH and RCH unless otherwise indicated.
Standard Intput Level
Input terminal LINE IN
source impedance 10kΩ
input signal level 0.5V (–3.8dB)
Standard Output Level
Output terminal LINE OUT
load impedance 47kΩ
output signal level 0.5V (–3.8dB)
Test T ape
Type Signal Used for
P-4-A100 10kHz, –10dB Azimuth Adjustment
WS-48B 3kHz, 0dB Tape Speed Adjustment
– 14 –
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