Sony ZS-S50CP User manual

SERVICE MANUAL
PERSONAL AUDIO SYSTEM
SPECIFICATIONS
Ver. 1.1 2007.08
9-887-662-02
2007H05-1
© 2007.08
Sony Corporation
Personal Audio Division
Published by SonyTechno Create Corporation
Model Name Using Similar Optical Pick-up Block NEW
Optical Pick-up Block Type KSM-213CCP
ZS-S50CP
AEP Model
E Model
CD player section
System
Compact disc digital audio system
Laser diode properties
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.)
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
AM:
except Mexican model:
531 - 1 611 kHz (9 kHz step)
530 - 1 610 kHz (10 kHz step)
Mexican model:
530 - 1 710 kHz
IFFM: 10.7 MHz
AM: 450 kHz
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
General
Speaker
Full range: 10 cm dia., 6 Ω, cone type (2)
Input
AUDIO IN jack (stereo minijack): Minimum input level 245 mV
Outputs
Headphones jack (stereo minijack)
For 16 - 64 Ωimpedance headphones
Power output
4.5 W + 4.5 W (at 6 Ω, 10% harmonic distortion)
Power requirements
For player:
Mexican model: 120 V AC, 60 Hz
Singapore model: 230 - 240 V AC, 50 Hz
Other models: 230 V AC, 50 Hz
9 V DC, 6 R20 (size D) batteries
For remote control:
3 V DC, 2 R6 (sizeAA) batteries
Power consumption
AC 16 W
Battery life
For player:
FM Radio reception
Sony R20P: approx. 30 h
Sony alkaline LR20: approx. 60 h
CD playback
Sony R20P: approx. 8 h
Sony alkaline LR20: approx. 20 h
It is recommended that you use alkaline batteries.
Dimensions
Approx. 480 ×156 ×250 mm (w/h/d)
(incl. projecting parts)
Mass
Approx. 4.3 kg (incl. batteries)
Supplied accessories
AC power cord (1)
Remote control (1)
Design and specifications are subject to change without notice.

2
ZS-S50CP
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 0 OR DOTTED LINE
WITH MARK 0ON 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 MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan thosespecifiedhereinmay result inhazardous radiation
exposure.
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Cabinet (Lower) Assy...................................................... 7
3-3. Cabinet (Upper) Assy ...................................................... 8
3-4. CD Block ......................................................................... 8
3-5. Main Block Assy ............................................................. 9
3-6. MAIN Board, CD Block Assy......................................... 9
3-7. Speaker (10 cm) (SP101) (L-CH),
Speaker (10 cm) (SP201) (R-CH) ................................... 10
3-8. Belt .................................................................................. 10
3-9. Optical Pick-up Block (KSM-213CCP) .......................... 11
4. TEST MODE ............................................................... 12
5. ELECTRICAL ADJUSTMENTS .......................... 12
6. DIAGRAMS
6-1. Block Diagram – CD SERVO Section – ......................... 15
6-2. Block Diagram – TUNER Section – ............................... 16
6-3. Block Diagram – MAIN Section –.................................. 17
6-4. Block Diagram – POWER SUPPLY Section – ............... 18
6-5. Printed Wiring Boards – CD Section – ........................... 20
6-6. Schematic Diagram – CD Board – .................................. 21
6-7. Printed Wiring Board – TU Board –................................ 22
6-8. Schematic Diagram – TU Board – .................................. 23
6-9. Printed Wiring Boards – JACK Section – ....................... 24
6-10. Printed Wiring Board – MAIN Board – .......................... 25
6-11. Schematic Diagram – MAIN Section (1/2) – .................. 26
6-12. Schematic Diagram – MAIN Section (2/2) – .................. 27
6-13. Printed Wiring Board – LCD Board – ............................. 28
6-14. Printed Wiring Boards – KEY Section – ......................... 29
6-15. Schematic Diagram – PANEL Section –......................... 30
6-16. Printed Wiring Boards – POWER SUPPLY Section –.... 32
6-17. Schematic Diagram – POWER SUPPLY Section – ........ 33
7. EXPLODEDVIEWS
7-1. Overall Section ................................................................ 42
7-2. Cabinet (Lower) Section.................................................. 43
7-3. Cabinet (Upper) Section .................................................. 44
7-4. Cabinet (Front) Section ................................................... 45
7-5. Front Panel Assy.............................................................. 46
7-6. Main Block Section ......................................................... 47
7-7. Loading Mechanism Section ........................................... 48
7-8. CD Block ......................................................................... 49
8. ELECTRICAL PARTS LIST .................................. 50

3
ZS-S50CP
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down 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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
MODEL IDENTIFICATION
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

MODEL NO. ZS-S50CP
PERSONAL AUDIO SYSTEM
Mexican model: AC: 120 V 60 Hz 16 W
Singapore model: AC: 230 - 240 V
- 50 Hz 16
W
Other models: AC: 230 V - 50 Hz 16 W
– Model Number Label –

4
ZS-S50CP SECTION 2
GENERAL This section is extracted from
instruction manual.
Basic Operations
*VOLUME +
Ȱ
and à
ȫ
on the unit have a tactile dot.
Before using the unit
To turn on/o the power
Press POWER
ȩ
.
To adjust the volume
Press VOLUME +, –
Ȱ
.
To listen through headphones
Connect the headphones to the (headphones) jack ȸ.
To select the sound characteristic
Press SOUND
Ȳ
repeatedly to select the audio emphasis
you want.
Choose To get
Powerful, clean sounds, emphasizing low and
high range audio
Light, bright sounds emphasizing high and
middle range audio
Percussive sounds, emphasizing bass audio
The presence of vocals, stressing middle
range audio
The whole dynamic range for music such as
classical music
To reinforce the bass sound
Press MEGA BASS
ȱ
to display “MEGA BASS” in the
display.
To return to normal sound, press MEGA BASS
ȱ
to
disappear from the display.
Playing a CD/MP3 disc
1 Press CD
ȳ
on the unit.
“CD” appears in the display.
2 Press ì
ȶ
on the unit, and place a disc with the
label side up on the CD tray.
To close the CD tray, press ì
ȶ
on the unit.
3 Press
àȫ
on the unit.
e unit plays all the tracks/MP3 les once.
When you place MP3 discs, “MP3” appears in the
display aer the unit reads the le information.
Audio CD
Track number Playing time
MP3 disc
MP3 le number After the song title is displayed,
the playing time* will appear.
*If the playing time is more than 100 minutes, it appears “--:--” in
the display.
To Press
Pause playback
êȫ . To resume play, press it again.
Stop playback
Ąȫ .
Go to the next track/
MP3 file
ßˎÑ ( Ñ on the remote) ȯ .
Go back to the
previous track/MP3
file
ùˎÃ ( Ã on the remote) ȯ .
Select a folder on an
MP3 disc /PRESET + ( + on the remote)
ȯ
to go forward and /PRESET – (
– on the remote)
ȯ
to go backward.
Locate a point while
listening to the sound
ßˎÑ (forward) or ùˎÃ
(backward) ȯ while playing and hold it
until you find the point. (On the remote,
use
ß or ùȯ )
Locate a point while
observing the display
ßˎÑ (forward) or ùˎÃ
(backward) ȯ in pause and hold it until
you find the point. (On the remote, use
ß or ùȯ )
Remove the CD
ìȶ .
On the remote
To se lect CD function, press FUNCTION
Ⱥ
repeatedly
to select “CD” in the display.
Tips
ˎ
Playback starts from the track/MP3 le you last stopped playing
(Resume play). During stop, the track/MP3 le number to be played
is displayed.
ˎ
To cancel the resume play (to start play from the beginning of the
rst track/MP3 le), press
Ąȫ
while the CD is stopped. When
you open the CD tray or turn o the unit, the resume play is also
canceled.
Notes
ˎ
When pressing
ȯ
(ß
ˎ
Ñ,ù
ˎ
Ã,j,) on the unit, press
the marking at the part near the outer edge.
ˎ
You cannot locate a specic track if “SHUF” or “PGM” is lit in the
display. Press
Ąȫ
, and then press MODE
Ȯ
repeatedly until
“SHUF” and “PGM” disappears from the display.
Example of folder structure and playing order
e playing order of the folders and les is as follows:
Folder
MP3 le
Notes on MP3 discs
ˎ
When the disc is inserted, the unit reads all the les on that disc.
During this time, “READING” is displayed. If there are many folders
or non-MP3 les on the disc, it may take a long time for play to
begin or for the next MP3 le to start play.
We recommend that you do not save unnecessary folders or les
other than MP3 ones in the disc to be used for MP3 listening.
ˎ
A folder that does not include an MP3 le is skipped.
ˎ
Maximum number of les: 255
Maximum number of folders: 150 (including the root folder)
Maximum number of folders and les in total: 300
Maximum directory levels: 8
ˎ
Folder names and le names can be displayed with up to 32
characters including quotation marks.
ˎ
e characters A - Z, 0 - 9, and _ can be displayed on this unit.
Other characters are displayed as “_”.
ˎ
is unit conforms to Version 1.0, 1.1, 2.2, 2.3 and 2.4 of the ID3 tag
format. When the le has the ID3 tag information, “song title”, “artist
name” and “album name” can be displayed. If the le does not have
the ID3 tag information, “NO TITLE” appears instead of song title,
“NO ARTIST” appears instead of artist name and “NO ALBUM”
appears instead of album name. e ID3 tag information can be
displayed with up to 30 characters.
ˎ
e characters may not be displayed correctly according to the
character code.
ˎ
When naming, be sure to add the le extension “mp3” to the le
name.
ˎ
If you put the extension “mp3” to a le other than an MP3 le, the
unit cannot recognize the le properly and will generate random
noise that could damage your speakers.
ˎ
e le name does not correspond to the ID3 tag.
Listening to the radio
To listen to FM or AM
1 Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit
(RADIO
ˎ
BAND
ȴ
on the remote) repeatedly to
select FM or AM.
2 Hold down TUNE + or –
ȯ
until the frequency digits
begin to change in the display.
e unit automatically scans the radio frequencies and
stops when it nds a clear station.
If you cannot tune in a station, press TUNE + or –
ȯ
repeatedly to change the frequency step by step.
When an FM stereo broadcast is received, “ST”
appears.
Tip
If the FM broadcast is noisy, press MODE
Ȯ
until “MONO” appears
in the display and the radio will play in monaural.
Changing the AM tuning interval
If you need to change the AM tuning interval, do the
following:
1 Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit
until “AM” is displayed.
2 Press ENTER
ȯ
on the unit for 2 seconds.
3 Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit for
2 seconds.
“9K STEP” or “10K STEP” ashes.
4 Press TUNE + or – on the unit to select“9K STEP” for
9 kHz interval or “10K STEP” for 10 kHz interval.
5 Press ENTER
ȯ
on the unit.
Aer changing the tuning interval, you need to reset your
preset AM radio stations.
Changing the AM tuning interval
(except Mexican model)
I
f
you nee
d
to c
h
ange t
h
e AM tuning interva
l
,
d
o t
h
e
following:
1Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit
until “AM” is displayed.
2Press ENTER
ȯ
on the unit for 2 seconds.
3Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit for
2 seconds.
“9K STEP” or “10K STEP” ashes.
4Press TUNE + or – on the unit to select“9K STEP” for
9 kHz interval or “10K STEP” for 10 kHz interval.
5Press ENTER
ȯ
on the unit.
Aer changing the tuning interval, you need to reset your
preset AM radio stations.

5
ZS-S50CP
Using the display
Yo u c a n check information about the CD using the
display.
Checking the information of an audio CD
To check the total track number and playing
time of the CD
Press Ą
ȫ
to stop the CD playback.
Total track number
Total playing time
Checking the information of an MP3 disc
To check the total folder number and total le
number on the CD
Press Ą
ȫ
while the CD is stopped, and you can check
them in the display.
Total le number Total folder number
To check le information
Press DISPLAY
Ȭ
on the unit while playing an MP3
disc. e display changes as follows:
e current le number and playing time
Ô

e song title ( )

e artist name ( )

e album name ( )
Playing tracks/MP3 les repeatedly
(Repeat Play)
You can play tracks/MP3 les repeatedly in normal,
Shue or Program play modes.
1Press CD
ȳ
.
“CD” appears in the display.
2Proceed as follows.
To repeat Do this
A single
track/MP3
file
1PressREPEAT
ȭ
until “ 1” appears.
2Press
Ã
ˎ
ù
or
ß
ˎ
Ñ
(
Ã
or
Ñ
on the
remote)
ȯ
to select the track/MP3 le that you
want to repeat.
3Press
à
ȫ
.
All tracks/
MP3 files on
the CD
1PressREPEAT
ȭ
until “ ” appears.
2Press
à
ȫ
.
A selected
folder (MP3
disc only)
1Press MODE
Ȯ
until “ ” appears, and then
press REPEAT
ȭ
until “ ” appears.
2Select the folder by pressing /PRESET + or –
(+ or – on the remote)
ȯ
.
3Press
à
ȫ
.
Tracks/MP3
files in
random
order
1Select Shue Play (see “Playing tracks/MP3 les
in random order”).
2PressREPEAT
ȭ
until “SHUF” and
“” appear.
3Press
à
ȫ
.
Files in a
selected
folder in
random
order (MP3
disc only)
1Start Folder Shue Play (see “Playing tracks/
MP3 les in random order”).
2PressREPEAT
ȭ
on the unit until “ ”,
“SHUF” and “ ” appear.
3Press
à
ȫ
.
Programed
tracks/MP3
files
1Program tracks/MP3 les (see “Creating your
own program”).
2PressREPEAT
ȭ
until “ ” and “PGM” appear.
3Press
à
ȫ
.
On the remote
To se lect the CD function, press FUNCTION
Ⱥ
repeatedly until “CD” appears in the display.
To cancel Repeat Play
Press REPEAT
ȭ
until “ ” disappears from the display.
Other Operations
Playing tracks/MP3 les in random
order
(Shue Play)
You can play tracks/MP3 les in random order. When
playing an MP3 disc, you can also play MP3 les in a
selected folder in random order (Folder Shue Play).
1Press CD
ȳ
.
“CD” appears in the display.
2Press MODE
Ȯ
until “SHUF”appears in the display.
When you select Folder Shue Play (MP3 disc only),
press MODE
Ȯ
on the unit until “ ” and “SHUF”
appear in the display. en press /PRESET + or
–
ȯ
on the unit to select a folder you want.
3Press à
ȫ
on the unit to start Shue Play.
On the remote
To se lect the CD function, press FUNCTION Ⱥ
repeatedly until “CD” appears in the display.
To cancel Shue Play
Stop playing rst. en press MODE
Ȯ
repeatedly until
“SHUF” disappears from the display.
Tips
ˎDuring Shue Play, you cannot select the previous track/MP3 le by
pressing
ù
ˎ
Ã
(
Ã
on the remote)
ȯ
.
ˎe resume function does not work during Shue Play.
Creating your own program
(Program Play)
You can arrange the playing order of up to 20 tracks on
a CD.
1Press CD
ȳ
.
“CD” appears in the display.
2Press MODE
Ȯ
repeatedly until“PGM” ashes in the
display.
3Press
ù
ˎ
Ã
or
ß
ˎ
Ñ
(
Ã
or
Ñ
on the
remote)
ȯ
then press ENTER
ȯ
for the track/MP3
les you want to program in the order you want.
For MP3 les, press /PRESET + or –
ȯ
rst and
then press ENTER
ȯ
.
Audio CD (Program Play)
Programed track number
Playing order
MP3 disc (Program Play)
Programed track number Playing order
4Press à
ȫ
to start Program Play.
On the remote
To se lect the CD function, press CD
ȳ
.
To cancel Program Play
Stop playing rst. en press MODE
Ȯ
repeatedly until
“PGM” disappears from the display.
To delete the last track of the program
Press CLEAR
Ȼ
on the remote while the player is
stopped.
To check the order of tracks before play
Press ENTER
ȯ
.
Every time you press the button, the track number
appears in the programed order.
To change the current program
Press Ą
ȫ
once if the CD is stopped and twice if the
CD is playing. e current program will be erased.
en create a new program following the programing
procedure.
Tips
ˎIf you try to program 21 tracks/MP3 les or more, “FULL” will
appear in the display.
ˎYou can play the same program again, since the program is saved
until you open the CD tray or turn o the power of the unit.
ˎe resume function does not work during Program Play.
Presetting radio stations
You can store radio stations into the unit’s memory. You
can preset up to 30 radio stations, 20 for FM and 10 for
AM in any order.
1Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit to
select the band.
2Hold down RADIO BAND
ˎ
AUTO PRESET
ȴ
on the
unit for 2 seconds until“AUTO” ashes in the display.
3Press ENTER
ȯ
while “AUTO” ashes in the display.
e stations are stored in memory from the lower
frequencies to the higher ones.
If a station cannot be preset automatically
You n eed to preset a station with a weak signal manually.
1Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit to
select the band.
2Tune in a station you want.
3Hold down ENTER
ȯ
on the unit for 2 seconds until
the preset number ashes in the display.
4Press /PRESET + or –
ȯ
on the unit until the
preset number you want for the station ashes in
the display.
5Press ENTER
ȯ
on the unit.
e new station replaces the old one.
On the remote
1Press RADIO
ˎ
BAND
ȴ
repeatedly until the band
you want appears in the display.
2Tune in a station you want.
3Hold down ENTER
ȯ
for 2 seconds until the preset
number ashes in the display.
4Press PRESET + or –
ȯ
until the preset number you
want for the station ashes in the display.
5Press ENTER
ȯ
.
e new station replaces the old one.
Tip
e preset radio stations remain in memory even if you unplug the
AC power cord or remove the batteries.
Playing preset radio stations
1Press RADIO BAND
ˎ
AUTO PRESET
ȴ
on the unit
(RADIO
ˎ
BAND
ȴ
on the remote) to select the band.
2Press /PRESET + or –
ȯ
on the unit (PRESET + or
–
ȯ
on the remote) to tune in the stored station.
Falling asleep to music
1Play the music source you want.
2Press SLEEP
ȹ
on the unit to display“SLEEP”.
3Press SLEEP
ȹ
on the unit to select the minutes
until the unit goes o automatically.
Each time you press the button, the indication changes
as follows:
“AUTO*” “60MIN” “30MIN” “20MIN” 
“10MIN” “OFF”.
*When you select “AUTO”, the CD stops playing in 90 minutes at
most and the unit goes o automatically. When you are listening
to the radio, the radio goes o in 90 minutes.
If 4 seconds have passed aer you pressed SLEEP
ȹ
,
the minutes in the display are entered.
When the preset time has passed, the unit goes o
automatically.
To cancel the sleep function
Press POWER
ȩ
to turn o the power.
Tip
e display’s backlight goes o while sleeping time is active.
Connecting optional component
You can enjoy the sound from a PC, TV, VCR, portable
digital music player, etc. through the speakers of this unit.
Be sure to turn o the power of each component before
making any connections.
For details, refer to the instruction manual of the
component to be connected.
1Connect the AUDIO IN jack ȷon the unit to the
line output jack of the portable digital music player
or other components using an audio connecting
cable* (not supplied).
*For a PC: use a cable which lls the connector of your PC.
For a TV or VCR: use a cable with a stereo-mini plug on one
end and two phono plugs on the other end.
For a portable digital music player: use a cable with a stereo-
mini plug on both ends.
2Turn the unit and the connected component on.
3Press AUDIO IN ȵand start playing sound on the
connected component.
e sound from the connected component is output
from the speakers.

ZS-S50CP
6
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. CABINET (LOWER)
ASSY
(Page 7)
3-5. MAIN BLOCK ASSY
(Page 9)
3-3. CABINET (UPPER) ASSY
(Page 8) 3-4. CD BLOCK
(Page 8)
3-6. MAIN BOARD,
CD BLOCK ASSY
(Page 9)
3-8. BELT
(Page 10)
3-7. SPEAKER (10 cm) (SP101) (L-CH),
SPEAKER (10 cm) (SP201) (R-CH)
(Page 10)
3-9. OPTICAL PICK-UP BLOCK
(KSM-213CCP)
(Page 11)

ZS-S50CP
7
Note: Follow the disassembly procedure in the numerical order given.
3-2. CABINET (LOWER) ASSY
2 three screws
(B2.6)
3 Release two hooks.
4 battery case lid
1
5 six screws
(B2.6)
8 foot (felt)
6
9
cabinet (lower) assy
7 connector
(CN901)
5 six screws
(B2.6)
Turn the set.
8 foot (felt)

ZS-S50CP
8
3-3. CABINET (UPPER) ASSY
3-4. CD BLOCK
6
7
flexible flat cable (4 core)
(CNP810)
8 cabinet (upper) assy
3 two screws
(B2.6)
1 screw
(M3)
2 telescopic antenna
(ANT1)
5 screw
(P2.6
× 10)
5 screw
(P2.6
× 10)
4 screw
(B2.6)
4 screw
(B2.6)
5 insulator
6 CD block
5 insulator
4
2
two floating screws
2 floating screw
3 two springs
(insulator)
3 two springs (insulator)
2 two floating screws
5 insulator
5 insulator
1 flexible flat cable
(21 core) (CNP201
)

ZS-S50CP
9
3-5. MAIN BLOCK ASSY
3-6. MAIN BOARD, CD BLOCK ASSY
3 connector
(CN902)
4 connector
(CN310)
5 screw
(B2.6)
0 main block ass
y
6
5
screw
(B2.6)
7 flexible flat cable (11 core)
(CNP802)
8 flexible flat cable (11 core)
(CNP806)
9 flexible flat cable (7 core)
(CNP807)
2 connector
(CN306)
1 connector
(CN309)
1 flexible flat cable (14 core)
(with sield (FFC): AEP, Italian, East European,
Russian models)
(MAIN board: CNP803, CD board: CNP201)
3 screw (B2.6)
3 two screws (B2.6)
8 two screws (B2.6)
0 three screws (B2.6)
qa IC BA5417 (IC305)
qa IC BA5417 (IC304)
qa transistor 2SD2394-F
9 three solders
6 four
solders
qs heat sink assy
3 two screws (B2.6)
7 shield plate
(main PWB)
5 four sheets (1)
qg three screws (B3)
qd MAIN board
qf panel (CD)
qh chassis block
qj CD block assy
2 flexible flat cable (5 core)
(MAIN board: CNP805, MOTOR board:CN001)
4

ZS-S50CP
10
3-7. SPEAKER (10 cm) (SP101) (L-CH), SPEAKER (10 cm) (SP201) (R-CH)
3-8. BELT
5 four screws
(B3)
4 Remove two solders.
4 Remove two solders.
5 four screws
(B3)
6 speaker (10 cm)
(SP101) (L-CH)
6 speaker (10 cm)
(SP201) (R-CH)
1 six screws
(B2.6)
1 six screws
(B2.6)
2 speaker box (L) section
2 speaker box (R) section
3 connector
(CN311)
4 belt
2 claw
2 claw
3 tray (AU)
1
belt
position of belt

ZS-S50CP
11
3-9. OPTICAL PICK-UP BLOCK (KSM-213CCP)
1 Remove four solders.
5 Remove four solders.
6 detection switch (limit)
(S201)
2 flexible flat cable (16 core)
(CN301)
7 CD board
4 optical pick-up block
(KSM-213CCP)
3 screw
(BVTT2
× 6)

12
ZS-S50CP SECTION 4
TEST MODE
COLD RESET
Procedure:
1. In the power on status, press three buttons of [ENTER], x,
[POWER] simultaneously.
2. The set is reset and display “RESET”, then becomes standby
status.
PANEL TEST MODE
Procedure:
1. In the standby mode or power on status, press three buttons of
[ENTER], [SLEEP], [DISPLAY] simultaneously.
2. When enter this mode, it turns on all segments of the liquid
crystal display.
3. In this mode, it displays as follows.
[BAND] button : Date/Version display
[AUDIO IN] button: Destination display
4. To exit from this mode, press three buttons of [ENTER],
[SLEEP], [DISPLAY] simultaneously.
CHANGE OF THE AM TUNING INTERVAL
(except Mexican model)
Procedure:
1. Press the [POWER] button to turn the power on.
2. Press the [BAND] button to select “AM”.
3. Press the [ENTER] button for 2 seconds, and then press the
[BAND] button for 2 seconds, “9K STEP” or “10K STEP” is
displayed on the liquid crystal display.
4. The AM tuning interval is selected by pressing the [TUNE +]/
[TUNE ---] button,and itis fixedby pressing the[ENTER] button.
SECTION 5
ELECTRICAL ADJUSTMENTS
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the [POWER] button to turn the power ON and press the
[CD] button to set the “CD” function.
3. Set disc (YEDS-18) on the tray and press the Nbutton to
playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
Checking Location:
+
–
CD board
TP121 (RFI)
TP124 (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level:
1.2
± 0.3 Vp-p
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101

13
ZS-S50CP
TUNER SECTION 0 dB=1 µV
[AM]
Setting:
Function: RADIO
Band: AM
[FM]
Setting:
Function: RADIO
Band: FM
•Repeat the procedures in each adjustment several times, and
the trackingadjustments shouldbe finally done bythe trimmer
capacitors.
•Remove FM antenna in FM adjustment.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
32 Ω
JACK (HP) Board
i jack (J301)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level meter
0.01 µ F
TU board
TP (GND)
TU board
TP (ANT)
set
32 Ω
JACK (HP) Board
i jack (J301)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
TU board
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 450 kHz
(): except Mexican model
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 530 kHz (531 kHz) 1.0 ±0.3 V
Confirmation 1,710 kHz (1,611 kHz) 5.2 ±0.8 V (4.8 ±0.6 V)
(): except Mexican model
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3 620 kHz (621 kHz)
CT3 1,400 kHz (1,404 kHz)
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2 10.7 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 108 MHz 3.0 ±0.3 V
Confirmation 87.5 MHz 1.3 ±0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 87.5 MHz
CT1 108 MHz
Adjustment and Connecting Locations: TU board (see page 14)

14
ZS-S50CP
Adjustment and Connecting Location:
L4
AM Frequency Coverage Adjustment
L2
FM Frequency Coverage Adjustment
AM Tracking Adjustment
CT3
L3
FM Tracking Adjustment
T1 AM IF Adjustment
T2 FM IF Adjustment
L1
CT1
–TU Board (Component Side) –
TP
(VT)
TP
(GND)
TP
(ANT)
–TU Board (Conductor Side) –

ZS-S50CP
1515
ZS-S50CP
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SERVO Section –
(Page 17)
SYSTEM CONTROLLER
IC803 (1/3)
CD-MP3 PROCESSOR
IC101
MUTE
2-AXIS
DEVICE
(TRACKING)(FOCUS)
95
89
A
CD
+3.3V
DETECTOR
FNi1 (A)
RFo
97 FPi1 (B)
88
2
AGCi
3RFRP RFZI
76TEi TEZi
83RFEQo 81 RFi
82 RFRPi
30LO
27RO
38BUS0
R-CH
94 FNi2 (C)
96 FPi2 (D)
100 TNi (E)
98 TPi (F)
91 LDo 92MDi
2 VO1+
1 VO1–
13 DMo
AUTOMATIC
POWER CONTROL
Q301
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213CCP)
B
C
D
E
F
12 FMo
10 TRo
9 FOo
20 IO0 (/HSO)
I-V AMP
M401
(SPINDLE)
M402
(SLED)
12 VO2–
11 VO2+
18 VO3+
17 VO3–
26 VO4+
27
7
IN4’ 24
IN3’ 20
IN2’ 9
IN1 3
BIAS 23
84 VRo
VO4–
M
M
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
S201
(LIMIT)
CD
+3.3V
24
XO
23
XI
X102
16.9344MHz
69 MMUTE
LOADING
MOTOR DRIVE
IC601
O-TRY-CLS 89
O-TRY-OPN
I-TRY-OPN
I-TRY-CLS
90
92
91
M
A
CD-L
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
VCC
A
B
C
D
E
F
LD
PD
SP+
VC
SP–
SL+
SL–
T+
T–
F+
F–
58 BUS0
39BUS1 59 BUS1
40BUS2 (SO) 60 BUS2
66 BUCK
41BUS3 (SI) 61 BUS3
42BUCK (CLK)
67 CCEN
43XCCE
54SBSY
48PIO0 68 REQ
57 SBSY
37XRST 70 MP3/CD-RST
S001
DISC TRAY
OPEN/CLOSE DETECT
OPEN
CLOSE
M001
(LOADING)

ZS-S50CP
1616
ZS-S50CP
6-2. BLOCK DIAGRAM – TUNER Section –
(Page 17)
(Page 17)
R COUNT
2
24
4 7
20 21
FM
RF AMP
FM
MIX
FM
OSC
FM IF
AMP
IF
BUFFER
AF
BUFFER
AF
AMP MPX MUTE
STEREO/
MONO,
FM/AM
AM IF
AMP
FM
DET
AM
DET
6
FM
RF-IN
22 AM
RF AMP
AM
MIX
AM
RF-IN
MIX-OUT
OSC
-OUT
CF2
FM/AM PLL
IC2
CF4
FM
RF-OUT
10
QUAD
FM
IF-IN 12
15
11
L-OUT
MPX
-IN
R-OUT
13
AM
IF-IN
LPF1/BAND
AM OSC FM OSC
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
FM FREQUENCY
COVERAGE
CT1, L1
FM TRACKING
CT3, L3
AM TRACKING
T1
AM IFT
LOW-PASS
FILTER
LOW-PASS
FILTER
• SIGNAL PATH
: FM
: AM
X1
75kHz
CT3
L1
FM RF
XOUT
XIN
AM IN
IF IN
ST-IND
LP-OUT
LP-IN
FM IN
20
19
111218
MW/LW
6
CT1
D1
L4
AM OSC
L2
FM OSC
LEVEL
DET
ST
IND
14
LPF2/MO-ST
AM
OSC BUFFER
BUFFER
SWALLOW
COUNTER
UNIVERSAL
COUNTER
CCB
INTERFACE
REFERENCE
DIVIDER
UNLOCK
DETECT
12 BIT
PROGRAMMABLE
DIVIDER
PHASE
DETECTOR/
CHARGE PUMP
SHIFT REGISTER & LATCH
1/2
MUTING
Q801
BAND
DI
CL
CE
DO
DET
-OUT
ANT1
FM TELESCOPIC
ANTENNA
PD
IF-OUT ST-IND
2
3
1
4
10 9
BAND
7
MO/ST
13817 16
17 18
16
19
D2
VT B+
D3
(1/2)
D3
(2/2)
AM IF
• R-ch is omitted due to same as L-ch.
R DATA
R CLOCK
R CE
R-CH
C
R MUTING
RA-L B
T2
FM IFT
FM IF
L3
AM FERRITE-ROD
ANTENNA
R DATA, R CLOCK, R CE,
R COUNT, R MUTING
AM FREQUENCY
COVERAGE

ZS-S50CP
1717
ZS-S50CP
6-3. BLOCK DIAGRAM – MAIN Section –
(Page 15)
AUDIO IN
R-CH
J302
CD-L
A
RA-L
B
8
5
7
22
DATA
21
CLK
VOL-DATA
33
VOL-CLK
34
A-MUTE
48
L-OUT
INPUT SELECTOR,
ELECTRICAL VOLUME
IC302
: FM
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: AUDIO IN
4L1-IN
L-IGOUT
L-VOLIN
L2-IN
L4-IN
9
MUTING
Q102
R-CH
BASS-ON
53
27
R-CH
SP101
(L-CH)
i
SP201
(R-CH)
J301
MEGA BASS
CONTROL
Q101
+
POWER AMP
IC304
POWER AMP
IC305
R-CH
WAKE UP
SWITCH
Q806
32 – 136 – 33
1 – 4 5 – 12,
14 – 25, 27 – 38
TU-DATA
97
CLKSFT-FM
SEG1 – SEG32
COM1 – COM4
44 – 46
I-KEY0 – I-KEY2
S401 – 405,
S407 – 422
SEG1 – SEG32
COM1 – COM4
86 I-WAKEUP 47
CLKSFT-AM
85
TU-CLK
98
TU-CE
96
TU-COUNT
99
TU-BMUTE
R DATA
R DATA, R CLOCK, R CE,
R COUNT, R MUTING
R CLOCK
R CE
R COUNT
R MUTING 100
SYSTEM CONTROLLER
IC803 (2/3)
SHIFT CLOCK
Q802, 803
LCD401
LIQUID
CRYSTAL
DISPLAY
LCD DRIVER
IC402
C
SI
47
SCK
48
CSB
46
INHB
44
RSTB
45
LCD-SO 19
LCD-SCK 20
LCD-CSB 14
LCD-INHB 12
LCD-RSTB 13
83
82
X802
5.53MHz
X1
X0
LED DRIVE
Q402
O-BK-LIGHT 1
RESET SIGNAL
GENERATOR
IC802
XRESETSYS +3.3V 77
D402, 403
(LCD BACK LIGHT)
I-RMC 64
D404
SW +9V OPR/BATT
REMOTE CONTROL
RECEIVER
IC401
EEPROM
IC805 ROM-SCL
22
ROM-SDA
21
(Page 16)
(Page 16)

ZS-S50CP
1818
ZS-S50CP
6-4. BLOCK DIAGRAM – POWER SUPPLY Section –
BATCHK-M 41
+6.2V
REGULATOR
Q907
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
6PCS. 9V
CD +3.3V
D805
REG +6.2V
AMP B+
SW +9V
+3.3V
REGULATOR
Q913
CD POWER
ON/OFF SWITCH
Q909, 910
SYS +3.3V
+3.3V
REGULATOR
IC801
SYSTEM CONTROLLER
IC803 (3/3)
I-AC/DC 55
CD-ON 54
REG3V-CHK 39
MAIN POWER
ON/OFF SWITCH
Q905
O-PCONT 56
B+ SWITCH
Q904, 906
B+ SWITCH
Q814, 815
LCD +3.3V B+ SWITCH
Q807, 812
REG6V-CHK 38
BATCHK-H 43
LCD-VDDON 3
RMC +3.3V B+ SWITCH
Q808, 809
D917
VT B+
D913
VOL B+
D914
RECT
D901 – 904
T901
POWER
TRANSFORMER
J901
AC IN
F902
AC POWER
SUPPLY DETECT
Q804
BATTERY
VOLTAGE DETECT
Q810, 811. 816
B+ SWITCH
Q915
CD +1.5V
+1.5V
REGULATOR
IC201

ZS-S50CP
1919
ZS-S50CP
TERMNAL (A) board
TERMNAL (B) board
KEY (TOP-L) board
KEY (TOP-R) board
TU board
LCD board
MAIN board
MOTOR board
CD board
PANEL (TOP) board
JACK (AU IN) board
JACK (HP) board
POWER board
•A: B+ Line.
•H: adjustment for repair.
•Power voltageis dc4.5V andfedwithregurated dcpower
supply from pin 1and 4of KH905 on the TERMINAL
(A) board, and power voltage is dc 9 V and fed with
regurated dc power supply from pin 3and 4of KH905
on the TERMINAL (A) board.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark :CD PLAY
– TU Board –
no mark : FM
():AM
– Other Boards –
no mark : FM
():CD PLAY
•Voltagesare takenwith aVOM(Inputimpedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Waveform are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•Circled numbers refer to waveform.
•Signal path.
F: FM
f: AM
J: CD PLAY
i: AUDIO IN
•Abbreviation
EE : East European model
IT : Italian model
MX : Mexican model
RU : Russian model
SP : Singapore model
TH :Thai model
•Note for PrintedWiring Boards and Schematic Diagrams
Note on Schematic Diagram:
•All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
•All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•W: indicates side identified with part number.
•f: internal component.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•Circuit Boards Location
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.
Caution:
Pattern face side: Partsonthepatternfaceside seenfrom
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
•Indication of transistor
C
BThese are omitted. E
Q
Ver. 1.1

ZS-S50CP
2020
ZS-S50CP
6-5. PRINTED WIRING BOARDS – CD Section – : Uses unleaded solder.•See Page 19 for Circuit Boards Location.
(Page 25)
(Page 25)
R150
R149
R148
R108
R154
R153
C148
C110
C109
C301
C303
C302
C104
R110
C116
C404
R203
R204
R205
R206
R207
R208
R209
R210
R219
R223
R222
R147 R221
R218
R146 R145
C150
R113
C403
R202
C151
C108
C105
C147
C146
C145
C152
C118
C117
C144
C101
C125
CN201
C143
C120
R144
R157
C142
C141 C140
C100
C107
R408
R156
C124
C127
C126
CN301
R101
C119
C102
R415
R414
C103
R405
C113
R102
R402
R105
R106 C132
C138
C137
R135
R134
R136
R130
R128
R129
R143
R139
C136
R120
R114
C153
C112
R125
R126
C149
C139
R127
R118
R140
R151
C122
C123
R220
R104
S201
R155
C128
C106
C201
R304
R302
C309
C205
C207
C307
R303
C133
R111
R112
C115
R211
Q301
R301
C204
C202
C206
C306
R212
C401
C130
X102
C405
IC201
IC401
IC101
R201
R142
CN001
S001
CD BOARD (COMPONENT SIDE)
CD BOARD (CONDUCTOR SIDE)
3
1
4
5
17 814
28 22 21 15
TP124
(VC)
TP121
(RFI)
125
26
50
5175
76
100
1
21
G
MAIN
BOARD
CNP803
161
1-872-135-
11
(11)
1-872-135-
11
(11)
OPTICAL PICK-UP BLOCK
(KSM-213CCP)
A
B
C
D
E
F
G
12 3 4 567 8 9
E
(LIMIT)
M401
(SPINDLE)
M402
(SLED)
M
M
1-866-548-
21
(21)
MOTOR BOARD
K
MAIN BOARD
CNP805
DISC TRAY
OPEN/CLOSE
DETECT
OPEN T CLOSE
M
M001
(LOADING)