Sony CDX-4240R User manual

SERVICE MANUAL
CDX-4240R/4250R
AEP Model
UK Model
Photo: CDX-4250R
Model Name Using Similar Mechanism | CDX-C570R/C580R
MG-363T-121
KSS-521A
CD Drive Mechanism Type
Optical Pick-up Name
CD player section
System
Signal-to-noise ratio
Frequency response
Wow and flutter
Tuner section
FM
Tuning range
Acrial terminal
Intermediate frequency
Usable sensitivity
Selectivity
Signal-to-noise ratio
Harmonic distortion at |
Separation
Frequency response
MW/LW
Tuning range
Aerial terminal
Intermediate frequency
Sensitivity
MICROFILM
Compact disc digital audio
system
90 dB
10 ~ 20,000 Hz
Below measurable limit
87.5 — 108.0 MHz
External aerial connector
10.7 MHz
12 dBr
75 dB at 400 kHz
65 dB (stereo),
68 dB (mono)
kHz
0.8% (stereo),
0.6% (mono)
35 dB at | kHz
30 — 15,000 Hz
MW: 531 — 1,602 kHz
LW: 153 - 281 kHz
External aerial connector
10.7 MHz / 450 kHz
MW: 30 LV
LW: 50 nV
SPECIFICATIONS
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4-8 ohms
Maximum power output 35 W x 4 (at 4 ohms)
General
Outputs Line output (1)
Power aerial relay control
lead
Power amplifier contro]
lead
Telephone ATT control
lead (CDX-4250R)
Bass +8 dB at 100 Hz
Treble +8 dB at 10 kHz
Tone controls
Power requirements 12 V DC car battery
(negative ground)
Dimensions Approx. 178 x 50 x 185 mm
(w/h/d)
Mounting dimension — Approx. 182 x 53 x 162 mm
(w/h/d)
Mass Approx. 1.2 kg
Supplied accessories Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without
notice.
FM/MW/LW COMPACT DISC PLAYER
SONY.

SERVICE NOTE
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
Notes on Chip Component Replacement
e Never reuse a disconnected chip component.
e Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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 pick-
up block. Therefore, when checking the laser diode emission, ob-
serve 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 pick-
up 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 pick-
up flexible board with a new one.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE
WITH MARK “4, 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 MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
NOTE FOR REPLACEMENT OF COMPLETE MAIN BOARD
The complete MAIN board (A-3294-577-A) of this set can be set to
address the specification for each destination by shorting or open-
ing one solder bridge of the MAIN board on the AEP and UK mod-
els and German models :
AEP and UK models : short
German model : open
The solder bridge below shold be opened when replacing the com-
plete MAIN board on the German model.
— main board (side B) —
Solder bridge
é

TABLE OF CONTENTS
1. GENERAL
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Setting the Clock ise. sveccosessieliieeacee eas eeriastjeeevur dae eteaseeerreeess 4
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2-2. Front Panel Assy
2-3. Sub Panel (1) ASSy .......ceceeeeeeeeeeeeeeeeeeeeeeeeseeseeeaeseneaeeaes 11
2-4. CD Mechanism BIOCK 000.0... ecccesceseeeeeeeeeeeeeceeeeeeeeeeeenee 11
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2-7. Chassis (T) Sub ASSy ...........:cccsccssccsscescececeseessscenesesceeeesaes 13
258, LGVERASSY i.e. tects acvcsecetstvas cvaecacedeannchcectosgseceeeenracdtsueahasaseneds 13
229.) Serve: Board. s2ecczecsl censteketsdeaeedebatedeblentesertvvontcentee tent adessente 14
2-10. Roller Assy
2-11. Chassis (OP) (O/S) ASSY ...ccceccecceseseseeseeseseeseteeeeseeerseeeenees 1S
2-12. Optical Pick-up BIOCK 0... ccc cseseesesenereeecseesseeseeeeeeees 15
3. ELECTRICAL ADJUSTMENTS
Tuner:Secuion sc Ales cessed Matas, ails 16
CD SectiOnis tiie. chiaicsnaciinrdiirardtaaad dra teeanautaaneeie 19
4. DIAGRAMS
4-1. IC Pin Description ..................
4-2. Block Diagram —CD Section—
4-3. Block Diagram —Tuner Section— 0.0.0... cece 25
4-4. Block Diagram —Display Section—
4-5. Circuit Boards Location ........cce cee eeeeeteeeeeneen
4-6. Printed Wiring Boards -CD Mechanism Section-............ 31
4-7. Schematic Diagram —CD Mechanism Section- ................ 33
4-8. Printed Wiring Board —Main Section-—
4-9. Schematic Diagram —Main Section (1/3)— oo... ese 39
4-10. Schematic Diagram —Main Section (2/3)= 0... cies reenes 41
4-11. Schematic Diagram —Main Section (3/3)— .......ececeeeees 43
4-12. Schematic Diagram —Display Section—.......... eee 45
4-13. Printed Wiring Board —Display Section— 0.0.0... 47
5. EXPLODED VIEWS
S-']. “(Chassis Section 'sed..s.5cs0 seg cede nde iaeeiaeta het anes 53
5-2. Front Panel Section .0.......cccccccceccsscceesecccesececseeeseesneeceeees 54
5-3. CD Mechanism Section (1) .......ccccecesceeseeeeseeeseeeteeenseees 55
5-4. CD Mechanism Section (2) .......ccceeeeececeseeeeeeeeteeeeneeeeseees 56
5-5. CD Mechanism Section (3) .........eccccecceceeceeeeeeeeeeeeteeeeaeees 57
6. ELECTRICAL PARTS LIST... ee 58
5

SECTION 1
GENERAL
This section is extracted
from instruction manual.
Notes
* Be sure not to drop the panel when detaching it
from the unit.
+ if you detach the panel while the unit is stiff
turned on, the power wil! turn aff automatically
to prevent the speakers from being damaged.
+ When carrying the front panel with you, use the
supplied front panel case.
Location of controls
Resetting the unit
Before operating the unit for the first time or
after replacing the car battery, you must reset
the unit.
Remove the front panel and press the reset
button with a pointed object, such as a
ballpoint pen.
Attaching the front panel
Attach part @ of the front panel to part © of
the unit as illustrated and push until it clicks.
SS
A =
Reset button
Notes
* Pressing the reset button will erase the clock
setting and some memorised functions. mn Notes |
+ When you connect the power supply cord to tl vy 7
unit or reset the unit, wait for about 10 seconds ee awe not ta attach the front panel upside
before you insert a disc. Hf you insert a disc within. D9 not press the front panel too hard against the
Refer to the pages for details.
By 4 eject) button 7
Sensor/manual search) contrat 8, 10, 12, AF/TA button 12, 13, 14
SEEK/AMS (seek/Automatic Music
15, 22, 24 these 10 seconds, the unit will not be reset, and unit when attaching It.
MODE (band/unit select) button 9, 10, it] RELEASE (front panel release) button you will have to press the reset button again. * Do not ress too hard or put excessive pressure.
20, 23 " on the display window of the front panel.
‘ 21 i * Do not expose the front panel to direct suntight
SOURCE (source sefect) button 7, 9, 10, Reset burton (located on the front side: pememnmnenmnmanemmmnpummnunmmnnms of Heat sources such 2s hot air ducts, and do not
14, 20, 23 of the unit behind the front panel) 5 . leave it in a humid place. Never leave it on the
eof) 7 {ER OFF button 5,7 Detach Ing the front panel dashboard of a car parked in direct sunlight or
HX Dial (volume/bass/treble/left-right’ z where there may be a considerable rise in
front-rear) 6, 18, 23 1 ip cp SETTLE e You can detach the front panel of this unit to temperature.
SOUND button 18 A DE 9, 10, 11, 24, protect the unit from being stolen.
[Bl
DsPt
(display
mode
change)
button
REP
9,
22
ae
asco
moe
tia
ancniuatel
7, 8, 11, 20, 21, 23, 24 eine nae 16, 19, 21 ress EF). position without removing the front panel, the
Display window
El CDx-casson/c4as4or:
PTY/UST button
CDX-4250R/4Z40R/4250RV:
PTY button
Disc Memo 23
List-up 24
RDS Programme 15
Setting the clock
The clock uses a 24-hour digital indication.
Example: To set the clock to 10:08
1 Press GHIFT), then press ( (SET UP)
repeatedly until “CLOCK” appears.
SET py orK
Ciuek
@ Press @ (—).
SEF san
wt
The hour indication flashes.
© Set the hour.
to go backward
to go forward
© Press @ (—).
SEF anes
‘The minute indication flashes.
@ Set the minute.
Hi During radio reception:
Number buttons 10, 13, 14
During CD/MD playback:
Direct disc selection buttons 22
D-BASS control 20
The illustration of the front panel in this manual is
of the COX-C4SSORIC4840R.
2 Press CGHETD.
The clock starts.
3 Press GHED.
After the clock setting is complete, the
display retums to normal playback mode.
2 Press (RELEASE), then slide the front
panel a little to the left, and pull It off
towards you.
SS
ps
4
Seat
Listening to a CD
Insert a CD.
Playback starts automatically.
Labelled side up
y,
Ifa CD is already inserted, press GOURCE)
repeatedly until “CD” appears to start
playback.
CD indkation
Track number
Elapsed playing time
Note
To play back an 8 cm CD, use the optional Sony
compact disc single adapter (CSA-8).
To Press
Stop playback 4 or GFF)
Eject the CD PS
caution alarm will beep for a few seconds,
Tf you connect an optional power amplifier and
do not use the built-in amplifier, the beep
sound will be deactivated.
Changing the display item
CDX-C4850R/C4840R:
Each time you press during CD or CD
TEXT disc playback, the item changes as
follows:
Track number!
Elapsed playback time
Disc name*'/Artist name*?
Track name*'
Clock
+1 if you inserted a non-CD TEXT disc, “NO NAME™
appears in the display.
*2 if you play a CD TEXT disc, the artist name
appears in the display after the disc name. (Only
for CD TEXT discs with the artist name.)
CDX-4250R/4240R/4250RV:
Each time you press during CD
playback, the item changes as follows:
Track number/Elapsed playing time — Clock
After you select the desired item, the display
will automatically change to the Motion
Display mode after a few seconds.
In the Motion Display mode, all the above
items are scrolled in the display one by one in
order.
Tip
The Motion Display mode can be turned off. (See
“Changing the sound and display settings” on
page 79).

10
Automatically scroiling a disc name
— Auto Scroll {COX-C4850R/C4840R only)
If the disc name, artist name, or track name on
a CD TEXT disc exceeds 8 characters and the
Auto Scroll function is on, information
automatically scrolls across the display as
follows:
© The disc name appears when the disc has
changed {il the disc name is selected).
* The track name appears when the track has
changed (if the track name is selected).
Tf you press to change the display
item, the disc or track name of the CD TEXT
disc is scrolled automatically whether you set
the function on or off.
1 During playback, press GHIED.
2 Press @ (SET UP) repeatedly until
“A.SCRL" appears,
3 press @ (+) to select “A.SCRL-ON.”
A Press GHFD.
To cancel Auto Scroll, select “A.SCRL-OFF” in
step 3 above.
Note
For some CD TEXT discs with very many characters,
the foliowing cases may happen:
— Some of the characters are not displayed
— Auto Scroll does not work.
Tip
To manually stroll the long name of a CD TEXT disc
after activating the Auto Scroff function, press
SHED, thea & (-—) {manual scrolt).
a
Memorising only the
desired stations
You can preset up to 20 FM stations (10 each
for FM1 and 2), up to 10 MW stations, and up
to 10 LW stations in the order of your choice.
1 Press SOURCE) repeatedly to select the
tuner,
2 Press repeatedly to select the
band.
3 Push the SEEK/AMS control up or down
to tune in the station that you want to
store on the number button.
4 Press and hold the desired number
button (@ to GO>) until “MEM”
appears.
‘The number button indication appears in
the display,
Note
Hf you try to store another station on the same
number button, the previously stored station will
be erased.
Locating a specific track
— Automatic Music Sensor (AMS)
During playback, push the SEEK/AMS
control up or down and release for each
track you want to skip.
To locate succeeding tracks 7, oo
To iacate preceding tracks AN
Locating a specific point in a track
— Manual Search
During playback, push the SEEK/AMS.
control up or down and hold. Release
when you have found the desired point.
To search forward 7,
So
To search backward AS
Note
"LULL" or" 211 1” appears in the
display, that means you have reached the
beginning or the end of the disc and you cannot
go any further.
ATER TILE PEELE EAL ENTE
Receiving the memorised
stations
1 Press GOURTE) repeatedly to select the
tuner,
2 Press repeatediy to select the
band.
3 Press the number button (@ to Gd) on
which the desired station is stored.
if you cannot tune in a preset
station
Push and release the SEEX/AMS control
up or down to search for the station
(automatic tuning).
Scanning stops when the unit receives a
station. Push the SEEK/ AMS control up or
down repeatedly until the desired station is
received.
Nate
if the automatic tuning stops too frequently, press
GEM, then press G) (PLAY MODE) repeatedly
until “LOCAL” (local seek mode) is displayed. Then
aress C4) (—+) to select “LOCAL-ON.” Press GHIFTD.
Only the stations with relatively strong signals will
be tuned in.
Tip
if you know the frequency of the station you want
to listen to push the SEEKIAMS contro! up or down
and hold until the desired frequency appears
(manuat tuning).
Playing a CD in various
modes
You can play CDs in various modes:
«REP (Repeat Play) repeats the current track.
*SHUF (Shuffte Play) plays ail the tracks in
random order.
Playing tracks repeatedly
— Repeat Play
1 During ptayback, press GHIED.
Every time you press GGHIFT), only the
items you can select light up.
2 Press @ (REP) repeatedly until "REP-1”
appears.
3
Repeat Play starts.
3 Press GHFD.
To retum to normal playback mode, select
“REP-OFE” in step 2 above.
Playing tracks in random order
— Shuffle Play
1 During playback, press GGHIFT).
2 Press ® (SHUF) repeatedly until “SHUF-
1” appears.
Shuffle Play starts.
3 press GHFT.
To retum to normal playback mode, select
“SHUF-OFF” in step 2 above.
lf FM stereo reception is poor
-— Monaural Made
1 During radio reception, press GHFT),
then press G) (PLAY MODE) repeatedly
until “MONO” appears.
2 Press @ (—+) repeatedly until “MONO-
ON” appears.
The sound improves, but becomes
monaural (“ST” disappears).
3 Press GHET.
To return to normal playback mode, select
“MONO-OFF” in step 2 above.
Changing the display item
Each time you press COSEL), the item changes
as follows:
Frequency + Clock
After you select the desired item, the display
will automatically change to the Motion
Display mode after a few seconds.
In the Motion Display mode, al! the above
items are scrolled in the display one by one in
order.
Tip
The Motion Display mode can be turned off. (See
“Changing the sound and display settings“ on
page 19).
Memorising stations
automatically
— Best Tuning Memory (BTM)
The unit selects the stations with the strongest
signals and memorises them in the order of
their frequencies. You can store up to 10
stations on each band (FM1, FM2, MW, and
Lw).
Caution
When tuning in stations while driving, use
Best Tuning Memory to prevent accidents.
1 Press repeatedly to select the
tuner.
Each time you press (SOURCE), the source
changes as follows:
fi: TUNER———> CD ~——-» ee
* if the corresponding optional equipment is not
connected, this item will not appear.
(CDX-C4850RIC4840R only)
2 Press repeatedly to select the
band.
Each time you press (ODE), the band
changes as follows:
a FM1——> FM2——> MW—> ea)
3 Press GHD, then press @D (PLAY
MODE} repeatedly until "B.T.M" appears.
4 Press @ (—+).
The unit stores stations in the order of their
frequencies on the number buttons.
A beep sounds when the seiting is stored.
5 press GaFD.
Notes
* The unit does not store stations with weak
Signals. If only 2 few stations can be received,
some number buttons will retain their former
setting.
+ When a number is indicated in the display, the
unit starts storing stations from the one currently
displayed.
* Ha CD is not in the unit, only the tuner band
appears even if you press SOURCE).
Overview of the RDS
function
Radio Data System (RDS) is a broadcasting
service that allows FM stations to send
additional digital information along with the
regular radio programme signal. Your car
stereo offers you a variety of services. Here are
just a few: retuning the same progranine
automatically, listening to traffic
announcements, and locating a station by
programme type.
Notes
* Depending an the country or region, not all of
the RDS functions are available.
* RDS may not work properly if the signal strength
4s weak or if the station you are tuned to (s not
transmitting ROS data.
SE NL
Displaying the station
name
The name of the current station lights up in the
display.
Select an FM station (page 9).
When you tune in an FM station that
transmits RDS data, the station name
appears in the display.
Note
The “*" indication means that an ROS station is
being received.
Changing the displayed item
Each time you press COSPD), the item changes
as follows:
Frequency (Station Name) -— Clock
After you select the desired item, the display
will automatically change to the Motion
Display mode after a few seconds.
In the Motion Display mode, all the above
items are scrolled in the display one by one in
order.
continue to next page —*
N

Tip
The Motion Display made can be turned off. (See
“Changing the sound and display settings” on
page 19).
Note
“NO NAME™ appears if the received station does
not transmit RDS data.
A RE SS ARNT EIS
Retuning the same
programme automatically
— Alternative Frequencies (AF)
The Alternative Frequencies (AF) function
automatically selects and retunes the station
with the strongest signal in a network. By
using this function, you can continuously
listen to the same programme during a long-
distance drive without having to retune the
station manually.
(py)
\
Sy)
1 Setect an FM station (page 9).
2 Press CAFITA) repeatedly until “AF-ON”
appears.
The unit starts searching for an alternative
station with a stronger signal in the same
network,
Note
When there is no alternative station in the area
and you do not need to search for an alternative
Station, turn the AF function off by pressing
repeatedly until “AF TA-OFF” appears.
12
To cancel the current traftic
announcement
Press GFITA) or GQOURCE).
To cancel all traffic announcements, turn off
the function by pressing CAF/TA) until
“AF TA-OFF” appears.
Presetting the volume of traffic
announcements
You can preset the volume level of the traffic
announcements beforehand so you,won’t miss
the announcement. When a traffic
announcement starts, the volume will be
automatically adjusted to the preset level.
1 Select the desired volume level.
2 Press GAFFE) for two seconds.
“TA” appears and the setting is stored.
Receiving emergency
announcements
Tfan emergency announcement comes in while
you are listening to the radio, the programme
will be automatically switched to it. If you are
listening to a source other than the radio, the
emergency announcements will be heard if
you set AF or TA to on. The unit will then
automatically switch to these announcements
no matter which source you are listening to at
the time.
14
Changing the displayed item
Each time you press CAF/TA), the item changes
as follows:
‘a TA-ON ————-> AF TA-ON®
AF-ON <————_ AF TA-OFF are
* Select this to turn on both the AF and TA
functions.
Notes
* When “NO AF” and the station name flash
alternately, it means that the unit cannot find an
alternative station in the network.
* Hf the station name starts flashing after selecting
2 station with the AF function on, this indicates
that 20 alternative frequency }s available. Push
the SEEK/AMS control up or down while the
Station name is flashing (within eight seconds).
The unit starts searching for another frequency
with the same Pi (Programme identification) data
("PI SEEK” appears and no sound is heard). if the
unit cannot find another frequency, “NO Pi”
appears, and the unit returns to the previously
selected frequency.
Listening to a regional programme
The “REG-ON” (regional on} function lets you
stay tuned toa regional programme without
being switched to another regional station.
{Note that you must tum the AF function on.)
The unit is factory preset to “REG-ON,” but if
you want to turn off the function, do the
following.
1 During radio reception, press GHFT),
then press G) (PLAY MODE) repeatedly
until “REG” appears.
2 Press @ {—) repeatedly until "REG-OFF”
appears.
3 Press GHD.
Note that selecting “REG-OFF” might cause
the unit to switch to another regional
station within the same network.
To return to regional on, select “REG-ON” in
‘step 2 above.
Note
This function does not work in the United
Kingdom and in some other areas.
Presetting the RDS
stations with the AF and
TA data
When you preset RDS stations, the unit stores
each station’s data as well as its frequency, $0
you don’t have to turn on the AF or TA
function every time you tune in the preset
station. You can select a different setting (AF,
TA, or both) for individual preset stations, or
the same setting for all preset stations.
Presetting the same setting for all
preset stations
1 Select an FM band (page 9).
2 Press repeatedly to select either
“AF-ON”, “TA-ON“ or “AF TA-ON* {for
both AF and TA functions).
Note that selecting “ AF TA-OFF” stores not
only RDS stations, but also non-RDS
stations.
3 Press GHIFT), then press @ (PLAY
MODE) repeatedly until “BTM” appears.
4 Press @ (—) until “B.T.M” flashes.
5 Press GHET).
Presetting different settings for
each preset station
1 Select an FM band, and tune in the
desired station (page 10).
2 Press CAFITA) repeatedty to select either
“AF-ON*, “TA-ON™ or “AF TA-ON™ (for
both AF and TA functions).
3 Press the desired number button until
“MEM” appears.
Repeat from step 1 to preset other stations.
Tip
ff you want to change the preset AF andior TA
setting after you tune in the preset station, you
¢an do so by turning the AF or TA function on or
off.
Local link function
(United Kingdom only)
‘The Local Link function lets you select other
local stations in the area, even if they are not
stored on your number buttons.
‘1 Press a number button that has a local
station stored on it.
2 within five seconds, press the number
button of the local station again.
3 Repeat this procedure until the desired
locat station ts received.
NOTTS A IS EIDE EES AE TT ET
Locating a station by
programme type
You can locate the station you want by
selecting one of the programme types shown
below.
Programme types Display
News NEWS
Current Affairs AFFAIRS:
Information INFO
Spons : SPORT
Education EDUCATE
Drama ; DRAMA
Giture SSCL RED
Science SCIENCE
Varied VARIED
Popular Music POP M
Rock Music ROCK M
Easy Listening EASY M ny
Light Classical LIGHT M
Ciassical CLASSICS
Other Music Type OTHER M
Weather ——=~=S=~=S*”*~C*wWEACTHER
Finance : FINANCE
Children’s programmes CHILDREN
Social Affairs SOCIAL A
Religion. RELIGION
Phonefa_ PHONE IN,
Travel TRAVEL
Leisure 7 LEISURE
Jazz Music JAZZ
Country Music COUNTRY
National Music NATION M.
OLDIES
FOLK M
DOCUMENT
NONE
Note
You cannot use this function in some countries
where no PTY (Programme Type selection) data is
available.
aR a a
Listening to traffic
announcements
The Traffic Announcement (TA) and Traffic
Programme {TP) data let you automatically
tune in an FM station that is broadcasting
traffic announcements even if you are listening
to other programme sources.
Press CAF/TA) repeatedly until “TA-ON”
or “AF TA-ON” appears.
The unit starts searching for traffic
information stations. “TP” appears in the
display when the unit finds a station
broadcasting traffic announcements.
When the traffic announcement starts,
“TA” flashes. The flashing stops when the
traffic announcement is over.
Tip
if the traffic announcement starts while you are
listening to another programme source, the unt
automatically switches to the announcement and
goes back to the original source when the
announcement is over.
Notes
« “NO TP” Hashes far five seconds if the received
Station does not broadcast traffic
announcements. Then, the unit starts searching
for a station that broadcasts it.
* When “EON” appears with “TP” in the display,
the current station makes use of broadcast traffic
announcement af other stations in the same
network,
1
1 Press CPYVAIST) during FM reception
until “PTY” appears.
PY
INFO
The current programme type name appears
if the station is transmitting the PTY data.
".+~+-" appears if the received station is
not an RDS station, or if the RDS data has
not been received.
2 Press TYE repeatedly until the
desised programme type appears,
The programme types appear in the order
shawn in the above table. Note that you
cannot select “NONE” (Not specified) for
Searching.
PTF
SPORT
3 Push the SEEK/AMS control up or down.
The unit starts searching for a station
broadcasting the selected programme type.
When the unit finds the programme, the
programme type appears again for five
seconds.
“NO" and the programme type appear
alternately for five seconds if the unit
cannot find the programme type. It then
returns to the previous selected station.
3
15

EE LP Es PT IE
Setting the clock
automatically
The CT (Clock Time) data fram the RDS
transmission sets the clock automatically.
1 During radio reception, press GHD,
then press ( (SET UP) repeatedly until
“CT™ appears.
SET
ta =
CTOFF
2 Press @ (—) repeatedly until “CT-ON“
Appears.
The clock is set
SET
CTON
3 Press CGHIED to return to the normal
display.
To cancel the CT function
Select "CT-OFF” in step 2 above.
Notes
* The CT function may not work even though an
ROS station is being received.
© There might bea difference between the time
set by the CT function and the actua/ time.
16
Other operations
Rotate the VOL control to
adjust the volume.
Press to
turn off
unit,
Press 10 adjust the
volume and sound menu,
Press (SD to display the
memorised names,
Changing the operative direction
The operative direction of controls is factory-
set as shown below.
To decrease
If you need to mount the rotary commander on
the right hand side of the steering column, you
can reverse the operative direction.
Press (SOUND) for two seconds while
pushing the VOL control.
Tip
You can also change the operative direction of
these controls with the unit (page 19).
18
You can also contro! this unit with an optional
rotary commander.
Labelling the rotary
commander
Depending on how you mount the rotary
commander, attach the appropriate label as
shown in the illustration below.
ARE PPE ON LP
Adjusting the sound
characteristics
You can adjust the bass, treble, balance, and
fader.
You can store the bass and treble levels
independently for each source.
1 Select the item you want to adjust by
Pressing repeatedly.
VOL (volume) —> BAS (bass) —>
TRE (treble) —+ BAL (left-right) -+
FAD (front-rear)
2 Adjust the selected item by rotating the
dial.
Adjust within three seconds after selecting.
the item. (After three seconds, the dial
function reverts to volume control.)
IER AE IE EEE TS
Attenuating the sound
Press (AT) on the optional rotary
commander,
“ATI-ON” flashes momentarily.
To restore the previous volume level, press
GED again.
Tip
The unit decreases the volume automatically when
a2 telephone call comes in (Telephone ATT
function). {COX-C48S50R/4250R/4250RV only)
a ee
Using the rotary
commander
The rotary commander works by pressing
buttons and/or rotating controls.
CDX-CAB50R/C4840R only:
You can also control optional CD or MD units
with the rotary commander.
By pressing buttons
Each time you press GGOURCED, the
source changes as follows:
TUNER —+ CD — MD*
¢ if the corresponding optional equipment is
not connected, this item will not appear.
(COX-C48SORICA840R only)
Pressing changes the operation
in the following ways:
*Tuner, FM1—+ FM2 —» MW—> LW
*COunit CD1—-CO2-+...
*MOunit MD1—+MD2—+..,
Changing the sound and
display settings
The following items can be set
* CLOCK (page 6).
© CT (Clock Time) (page 16).
* D.INFO (Dual Information) - to display the
clock and the play mode at the same time
(ON) or to display the information
alternately (OFF).
* AMBER/GREEN - to change the illumination
colour to amber or green. (CDX-C4850R/
C4840R/4250R only)
¢ DIM (Dimmer)-to change the brightness of
the display. (CDX-C4850R/C4840R/4250R/
4240R only)
— Select “ON” to dim the display.
* BEEP - to turn on or off the beeps.
RM (Rotary Commander) - to change the
operative direction of the controls of the
rotary commander.
— Select “NORM” to use the rotary
commander as the factory-set position.
— Select “REV” when you mount the rotary
commander on the right side of the
steering column.
*M.DSPL (Motion Display) - to turn the
motion display on or off.
+ A.SCRL (Auto Scroll) (page 8, 21).
(CDX-C4850R/C4840R only)
Note
if you connect an optional power amplifier and do
Not use the buit-in amplifier, the beep sound will
be disabled.
By rotating the control
{the SEEK/AMS control)
Rotate the control momentarily and
release it to:
* Locate a specific track on a disc. Rotate
and hold the control until you locate the
specific point in a track, then release it to
start playback.
¢Tune in stations automatically. Rotate and
hold the control to find a specific station.
By pushing in and rotating the
control (the PRESET/DISC contro})
Push in and rotate the control to:
« Receive the stations memorised on the
number buttons.
# Change the disc. (CDX-C4850R/C4840R
only)
1 Press GHIET).
2 Press @ (SET UP) repeatedly until the
desired item appears.
Each time you press (@) (SET UP), the item
changes as follows:
CLOCK -» CT —» D.INFO* ~-» AMBER/GREEN ~+
DIM ~» BEEP —» RM ~« M.OSPL —+ A.SCRL*
* When no CD or MD is playing, this item wil
not appear.
Note
The displayed item will differ depending on
the source.
3 press ) (—) to select the desired
setting (Example: ON or OFF).
4 Press GHFD.
After the mode setting is complete, the
display returns to normal playback mode.
7
19

Connections
Fi ea
Cautions
© This unit is designed for negative earth 12 VDC
operation only.
* Be careful not to pinch any wires between a
screw and the body of the car or this unit or
between any moving parts such as the seat
railing, etc.
Connect the power connecting cord @ to the
unit and speakers before connecting it to the
auxiliary power connector.
*Run all earth wires to a common earth point.
¢ Connect the yellow cord to a free car circuit
rated higher than the unit's fuse rating. If you
connect this unit in combination with other
stereo components, the car circuit they are
connected to must be rated than the sum
of the individual components’ fuse rating. If
there are no car circuits rated as high as the
unit's fuse rating, connect the unit directly to the
battery. If no car circuits are available for
connecting this unit, connect the unit to a car
circuit rated higher than the unit’s fuse rating in
such a way that if the unit blows its fuse, no
other circuits will be cut off.
Connecting this unit may cause some car battery
wear when your car has no ACC (accessory)
position on the ignition key switch.
In this case, please consult your nearest Sony
dealer.
ES RE EE
Notes of connection example
Notes on the control leads
© The power aerial controf lead (blue) supplies +12 V
DC when you activate the AF (Alternative
Frequency) or the TA (Traffic Announcement)
* A power aerial without a relay box cannot be used
with this unit.
Waming
if you have a power serial without a relay box,
connecting this unit with the supplied power
connecting cord @ may damage the aerial.
Memory hold connection
When the w power input lead is connected,
power will always be supplied to the memory circult
even when the ignition switch Is turned off,
Notes on speaker connection
* Before connecting the speakers, turn the unit off.
«© Use speakers with an impedance of 4 to 8 ohms, and
with adequate power handling capacities.
Otherwise, the speakers may be damaged.
* Do not connect the terminais of the speaker system
to the car chassis, and do not connect the terminals
of the right speaker with those of the left speaker,
© Do not attempt to connect the speakers in paraiiel,
+ Do not connect any active speakers (with built-in
amplifiers} to the speaker terminals of the unit.
Doing so may damage the active speakers. Be sure
to connect passive speakers to these terminals.
Conexiones
Precauciones
¢ Esta unidad ha sido disefiada para alimentarse
con 12 VCC, tivo a masa, solamente.
oT cuidado de no atrapar ningun cable entre
algun tornillo y la carroceria del automévil o
esta unidad o entre las partes mdviles, como por
ejemplo los railes de! asiento, etc.
* Conecte el cable de conexién de alimentacién ©
a ia unidad y fos altavoces antes de conectarlo al
conector de alimentacién auxiliar.
« Conecte todos los conductores de puesta a
masa a un punto comin.
* Conecte el cable amarillo a un circuito libre del
automévil de nominal superior a la det
fusible de la unidad. Si conecta esta unidad en
combinacién con otros com; estéreo, la
potencia nominal dei circuito de! automévil a los
que dichos componentes estén conectados debe
ser superior a la sume de la potencia nominal
del fusible de los com Si no existen
circuitos de automévil de potencia nominal tan
alta como fa del fusible de la unidad, conecte
ésta directamente a la baterfa. Si no hay circuitos
de automévil disponibles para conectar esta
unidad, conecte la misma a un circuito de
automdvil de nominal superior a la del
fusible de la unidad de forma que no se
desactiven otros circuitos si el fusible de dicha
unidad se funde.
* La conexién de esta unidad puede producir
cierta descarga de la bateria si el automévil no
dispone de posicién ACC (accesorios) en el
interruptor de la Ilave de encendido.
En este caso, consulte con el proveedor Sony
més proximo.
RE
Notas de ejemplo de conexiones
Notas sobre conductores de contro!
* El conductor de control (azul) de la antena
motorizada suministra + 12 V CC af activar la funci6n
AF (frecuencias aiternativas) o TA (anuncies de
tréfico).
* Can esta unidad no podrd utilizarse una antena
motorizada sin caja de reiés.
Advertencia
Si dispone de una antena motorizada sin dispositive
de reié, la conexidn de esta unidad con ef cable de
conexidn de alimentacién © suministrado puede
dafiar la antens.
Conexién para proteccién de la memoria
Si conecta ef conductor de entrada amarillo, ei circuito
de fa memoria recibiré siempre alimentacién, incluso
aunque ponga ia Have de encendido en fa posicion de
desactivacién,
Notas sobre fa conexiin de los altavoces
* Antes de conectar los altavaces, desconecte /a
afimentacién de fa unided.
* Utilice altavoces con una impedancia de 4a
8 ohmios, y con la potencia méxima sdmisible
adecuada, ya que de fo contrario podria daflarios.
© No conecte fos terminales del sistema de altavoces a!
chasis del sutomdvil, ni los del aftavoz Izquierdo a
fos det derecho.
* No intente conectar los altavoces en paralelo.
* No conecte altavoces activos (con amplificadores
incorporados) a los terminaies de altavoces de le
unidad. Si Ip hiciese, podria dafiar tales altevoces.
Por fo tanto, cerddrese de conectar aitevoces pasivos
2 estos terminales.
Ligagoes
Peo eS ie NEN
Cuidado
* Este apareiho foi concebido para funcionar
somente com corrente continua de 12 V com
negativo A massa.
*Tenha cuidade para que os fios ndo fiquem
entalados entre os parafusos e a carrocaria do
automével ou a cab do apareiho nem entre as
Poses smisveis, por exemplo, 08 calhas doe
etc.
© Ligue 0 cabo de alimentacdo de corrente @ a0
apareiho e aos alifalantes antes de o ligar a0
conector de corrente auxiliar.
¢ Ligue todos os cabos de massa num ponto de
massa comum.
¢ Ligue o cabo amarelo a um circuito eléctrico
livre do automével, cuja poténcia nominal seja
superior a dos fusiveis do aparetho. Se ligar este
aparelho em série com outros componentes
estéreo, a poténcia nominal do circuito eléctrico
do automével onde os ligar tem de ser superior
& soma das poténcia nominal dos fusiveis de
todos os individuais. Se ndo
houver nenhum circuito eléctrico do automével
com uma poténcia nominal téo elevada como a
dos fusfveis do apareiho, ligue-o directamente &
bateria. Se nio estiver dis nenhum
Circuito eléctrico do automével para ligacfo
deste apareiho, ligue-o a um circuito eléctrico do
automdvel com uma poténcia nominal superior
’ dos fusiveis do apareiho, de tal modo que, se o
aparelho rebentar os fusiveis respectivos,
nenhum outro circuito seja cortado.
+ A ligacho deste aparetho prover
le scape apie aac le i do
automédvel nic tiver a posicho ACC (acesedrios).
Nesse caso, entre em contacto com o agente da
Sony mais préximo.
Notas sobre o exemplo de
ligagdo
Notes sobre os fios de controlo
* 0 filo de control da antena eldctrica (azul) fornece
+12 V CC quando activar as funcdes AF (frequéncia
alternativa) ou TA (informacées de transito).
© Nido pode utilizar uma antena eléctrica sem caixa de
reié com este aparetho.
Atengéo
Se @ antens eléctrica néo tiver uma caixa de reid, 0
facto de ligar este aparetho com a cabo de
alimentacdéo @ fornecido, pode provocar danos ne
antena,
Ugecho pere alimentacfo continua da memécia
Quando o fio amerelo de entrada de alimentacéo for
ligado, os circuitos de memdria ficaréo com
alimentacso continua, mesmo se a chave de ignicso
estiver desligada.
Notas sobre a ligacho dos sitifalantes
© Antes de ot abe altifalantes, desligue 0 apareiho.
* Utilize altifalentes com impedéncia de 4 8 8 ohm, e
com capacidade edmissivel de poténcia adequada.
Caso contrario, os attifalentes poderéo sofrer
avarias.
* Néo ligue os terminais do sistema de altifalantes a0
chassis do automdvel, ¢ nSo Hgue os terminais do
altifalante direito aos terminais do altifalante
esquerdo.
* N3o tente ligar os altifelantes em pareleto.
+ N&o ligue nenhum sistema de altifalantes actives
{com ampltficadores dos) aos terminals dos
altifaiantes do aparetho. Caso 0 faca, poderé avariar
0 sistema de aitifaiantes activos. Portento, nfo se
esqueca de ligar altifelantes passivos a estes
terminais,
Anslutning
Sakerhetsforeskrifter
© Denna bilstereo dr endast avsedd for anslutning
till ett negative jordat, 12 V bilbatteri.
+ Var noga med att ings kablar klims mellan
nagon skruv eller att de blir kldmda meilan
rorliga delar som Lex. bilsatet.
¢ Anslut strémkabein @ till enheten och
innan du ansluter den till den yttre
stromanslutning.
¢ Dra samtliga jordiedningar till en och samma
Jordningspunkt.
¢ Anslut den gula kabein till en ledig bilkrets med
peli ales atreag =
andra
siereckoe ter maste den bilkrets de
kop ha ett hOgre amperetal in summan
ay de wakikis delattas ampeevirde. Om et
inte finns ndgra bilkretsar med en sh hig
amperetal som enhetens ska du ansiuta enheten
direkt till batteriet. Om inga dilkretsar finns for
anslutning till enheten ska du ansiuta enheten
till en bilkrets med ett hOgre amperetal An
enhetens, s4 att inga andra kretsar stings av om
enhetens sakring brinner av.
Nar du anstuter den har enheten kan det hinda
att bilbatteriet tar slut snabbare om bilens
tindlds saknar det speciella liget for tillbehor,
Acc.
1 84 fall bor du ta kontakt med din nirmaste
Sony-dterforsAljare.
ES TE
Att observera angdende
anslutningsexemplen
Att observers angéende de olika styrkablame
* Motorantennens styrkabel (bia) feder + 12 volts
likstrom nér mottagning av alternative frekvenser
AF eller mottagning av trafikmeddelanden TA
aktiverats,
© En motorantenn utan styrreladosa kan inte ansiutas
til denne bilstereo.
Varning
Om du har en motorantenn utan relédosa kan
antennen skadas om du ansiuter enheten med den
medfoijande strémkabein @.
Anstutning fée minnesstéd
Nér du anslutit den gula, ingdende stromkabein
forsérfs minneskretsen med strom hela tiden, dven nar
tandldset sias ifran.
Att observera angdende hégtelamas anslutning
© Sid av bibtereon innan du anstuter hégtalarna.
* Ansiut endast hdgtalere med en impedans melian 4
och 8 ofm och med titlrécklig
effekthanteringskapacitet for att skydda hégtalarna
sot skador.
© Anslut inte ndgot av hdgtalaruttagen till bilens
chassi. Anstut inte hetler uttagen p4 héger hégtalare
til uttagen pd vinster hdgtalare.
+ Anstut inte hdgtalarna paraitellt.
¢ Ansiut inte aktiva hégtalare (med inbyggda slutsteg)
til bustereons hdégtalaruttag, efteriom de kan skada
Ge aktiva hOgtalama. Var noga med att bara ansiuta
passive hégtalare tii dessa uttag.

*' Note for the aerial connecting
if your car aerial is an SO
{international Organization for
Connection example
Ejemplo de conexiones
H a Standardization) type, use the
Exemplo de ligagdes supplied adapter @ to connect it.
Anslutningsexempel First connect the car aerial to the
supplied adapter, then connect it fo
the aerial jack of the master unit.
REMOTE IN
Rotary commander RM-X4S (not supplied)
Mando rotativo RM-X4$ (no suministrada)
Comando rotativo AM-X45S (ndo fornecido)
Vridkontroll RM-X45 (medféljer inte)
Fuse (10 A)
Fusible (10 A}
Fusivel (10 A)
Sakring (10 A)
to the interface cable of # car telehone
(CDX-42S50R/4250RV only) Sky blue
al cable de interfaz de un teléfono para automdvil Azul celeste
(S6lo CDX-4250R/4250AV) Azul celeste
ao cabo de interface do telefone para automével arr Ljusbla
(S6 para os modelos CDX-4250R/4250RV) =
till biltelefonens grinssnittskabei
{Endast COX-4250R/4250RV)
*? WARNING
Auxiliary power connectors may vary depending on the car. Be sure to check the power connection
diagram sheet supplied with the unit. Improper connections may damage your car. If the supplied
power connecting cord can not be used with your car, consult your nearest Sony dealer.
*7 ADVERTENCIA
Los conectores de alimentacién auxiliar pueden varias en funcién del automavil, Asegurese de
consultar ef diagrama de conexién de alimentacion suministrado con la unidad. Las conexiones
incorrectas pueden dafiar el automdvil. Si no es posible utilizar con el automdvil el cable de conexion
de alimentacién suministrado, pongase en contacto con el proveedor Sony mas préximo.
*1 ADVERTENCIA
Os conectores de corrente auxiliares podem variar de carro para carro. N&o se esqueca de verificar o
diagrama de ligac3a de corrente fornecido com o apareiho. As ligagées mai executadas podem
danificar o seu carro. Se ndo puder utilizar o cabo de alimentacgdo fornecida com © seu carro, contacte
9 agente Sony da sua zona,
“VARNING
Typen av yttre strémansiutning varierar fran bil til bil. Kontroliera strémanstutningsschemat som
medfSljer enheten s4 att du ansluter pa rit satt. Felaktig anslutning kan skada bilen. Kontakta
n&rmaste Sony-dterférsiljare om den medfdijande stromakabeln inte passar till din bil.
from the car's power connector
del conector de alimentacién del automovil
a partir do conector de alimentacao do automével
fran bilens strémansiutning
switched power supply
suministro conmutado de alimentacién
alimentecdo de corrente comutada
switchad strémférsirjning
continuous power supply
Suministro de alimentacién continua
atimentagéo de corrente continua
kontinuerlig stromférsdrjning
power aerial contro!
control de antena motorizada
antena eléctrica
strom till antennstyrning
switched illumination power supply
{COX-4240R/4250R only)
fuente de alimentacion de
ituminacion conmutada
(Solo CDX-4240R/4250R)
fonte de alimentacao comutads para
Huminacho (56 para os modelos
CDX-4240R/4250R)
switchad strémférsdrjning tilt
belysning (Endast COX-4240R/4250R)
Positions 1, 2 and 3 do not have pins.
Las posiciones 1, 2 y 3 no disponen de pines.
AS posicdes 1, 2 e 3 ndo tém pinos.
Pasitionerna 1, 2 och 3 saknar stift.
*' Nota sobre la conexién de ja antena
Sila antena def automdvil es del
tipo {SO (international Organization
for Standardization), empiee e/
adaptador suministrado @ para
conectaria.
En primer lugar, conecte ia antena
del automdvil ai adaptador
suministrado y, a continuacian, a ja
toma de antena de /a unidad
*t Nota referente 2 ligacéo da antena
Se a antena do automdvel for uma
antena de tipo ISO {international
Organization for Standardization),
utilize o adaptador fornecido @
para fazer a ligacdo respectiva,
Ligue primeiro a antena do
automdével a0 adaptador fornecida
e depois 2 ficha tipo jack de antena
do sistema principal,
*! Angdende antennanslutning
Om matorantennen ar av iSO-typ
(international Organization for
Standardization), anvander du
medtiljande adapter @ for att
ansluta den.
Anslut forst antennen till
medfdljande adapter och darefter
tit antennuttaget pa huvudenheten.
principal.
LINE OUT REAR
Cable con cla
Blue/white striped
Con raya azul/blanca
Azul com listras brancas
81a/vit-randig
Max. supply current 0.3 A
Corriente max. de alimentacién de 0,3 A
Corrente maxima de 0,3 A
Maximal strémstyrka 0,3 A
Speaker, Rear, Right
Aitavoz, Parte posterior, Derecho
Altifalante, Parte de tras, Direito
Hégtalare, Bakre, Higer
RCA pin cord {not supplied)
Cabo de terminais RCA (ndo fornecido)
Kabel med RCA-kontakter (medfdljer inte}
AMP REM
Speaker, Rear, Right
Altavoz, Parte posterior, Derecho
Altifalante, Porte de tras, Direito
Hégtalare, Bakre, Hger
Speaker, Front, Right
Altavoz, Parte frontal, Derecho
Altifatante, Parte da frente, Direito
Hégtalare, Frimre, Héger
Speaker, Front, Right
Altavoz, Parte frontal, Derecho
Altifalante, Parte da frente, Direito
Hégtatare, Framre, Héger
from car aerial*'
de la antena del automévil*"
da antena do automodvel**
tran bilantenn*'
RCA (no suministrado)
To connect to AMP REMOTE IN of the optional power
amplifier,
This connection is only for amplifiers. Connecting any other
system may damage the unit.
Para conectar a AMP REMOTE IN dei amplificador de
potencia opcional,
Esta conexidn es sdlo para amplificadores, La conexidn de
cualquier otro sistema puede dafar la unidad,
Para ligacéo a AMP REMOTE IN do amplificador de poténcda
adicional.
Esta ligagdo destina-se apenas aos amplificadores. A ligagso
de qualquer outro sistema pode provocar avarias no
aparetha.
Anslata till AMP REMOTE IN pa den valtria
effekttOrstarkaren.
Denna anslutning galler endast for hégtalare. Om du
ansluter ndgot annat system kan enheten skadas.
from the car's speaker connector
del conector de altavox del automdvil
a partir do conector do altifalante do automével
fran bilens hégtalaransiutning
Speaker, Front, Lett
Altavoz, Parte frontal, Izquierdo
Ahtifalante, Parte da frente, Esquerdo
Hégtalare, Frimre, Vinster
Speaker, Front, Left
Altavoz, Parte frontal, Izquierdo
Altifatante, Parte da frente, Esquerdo
Hégtalare, Framre, Vanster
Speaker, Rear, Left
Altavoz, Parte posterior, Izquierdo
Altifalante, Parte de tras, Esquerdo.
Hégtalare, Bakre, Vanster
Spenker, Rear, Left
Aitavaz, Parte posterior, tzquierdo
Altifalante, Parte de tras, Esquerdo
Hégtalare, Bekre, Vinster
Negative polarity positions 2, 4, 6, and & have striped cords.
Las posiciones de pofaridad negativa 2, 4, 6 y 8 tienen cables con raya.
As posicées 2, 4, 6 e 8 (polaridade negativa) tém cabos as riscas.
De negativa poipositionerna 2, 4, 6 och 8 har randiga kablar.

SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. COVER
2-2. FRONT PANEL ASSY
ke. Sx.
Ge
D button (release)
S40

2-3. SUB PANEL (1) ASSY
sub panel (1) assy << Za
™~
i
PTT 2.6x6
2-4. CD MECHANISM BLOCK
@ PTT 2.6x6
PTT 2.6x6
© bracket (M/D <
aca ee ae PTT 2.6x6
© CD mechanism block wee
OX “a PTT 2.6x6
e
{
cy
x
S4hS

2-5. MAIN BOARD
MAIN board ground point screws
(PTT 2.6x6)
Sy,
ground point screw
(PTT 2.6x6)
PTT 2.6x8
PTT 2.6x8
PTT 2.6x8
2-6. HEAT SINK
heat sink
PTT 2.6x8
) ae 2.6x12
P
TT 2.6x8
2405

2-7. CHASSIS (T) SUB ASSY
we chassis (T) sub assy
O P 2x3 Sat |
ca : G—0 P20
2-8. LEVER ASSY
guide (disc)
9 lever (AR) assy
| l tension spring (LR)
Ste
. lever (L) assy
| be
PS 2x4
| | ee
a << ° DISC IN SW board
a | aN
© claws
me be

2-9. SERVO BOARD
SERVO board
2-10. ROLLER ASSY
¢ When installing, take note of the positions
arm (roller) and washers. (Fig. 1)
washer arm washer washers arm
Fig. 1
© PS.2x3 roller assy
X
arm (roller)
© LOAD SW board
pa
tension
spring
(RA)
qa

2-11. CHASSIS (OP) (0/S) ASSY
DB chassis (OP) (O/S) assy
>
(3) ion spring (FL S ! |
compression spring (| I Sg
@ tension spring (angle) wr 4,
4 compression spring (FL)
S
tension spring (KR1)
B Fit lever (D) in the
direction of the arrow.
© Turn loading ring in the
direction of the arrow.
© damper n—Q ° O—e Ganyper(?)
2-12. OPTICAL PICK-UP BLOCK
S optical pick-up block

SECTION 3
ELECTRICAL ADJUSTMENTS
TUNER SECTION 0dB=1,uV
Cautions during repair
When the tuner unit is defective, replace it by a new one
because its internal block is difficult to repair.
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and MW Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the “OFF” mode.
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 indicates all lights, the test mode is set.
<Release the Test Mode>
1. Push the |OFF] button.
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. FM RDS S-Meter Adjustment
4. MW Auto Scan/Stop Level Adjustment
FM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
FM PF signal
generator
antenna
terminal
0.01 uF ma
CD
Carrier frequency : 98.00 MHz
Output level : 22 dB (12.6 pV)
Mode mono
Modulation 11 kHz, 22.5 kHz deviation (30%)
Procedure :
1. Set to the test mode.
2. Push the [SOURCE |button and set to FM.
Display
E M Un a ee
GA
3. Push the preset [3] button.
Display
2 M SHUF
_t CICITATA
_! —I ILI LI
4. Adjust with the volume RV2 on TU601 so that the “FM”
indication turns to “FMO” indication on the display window.
But, in case of already indicated “FMO”, turn the RV2 so that
put out light “O” indication and adjustment.
Display
Adjustment Location : See page 18.
eee fee
ae De ee Ce ee SOR CRS)

FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
FM FF signal
generator
antenna
level
meter
terminal
Carrier frequency : 98.00 MHz LINE OUT REAR
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation imain: 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
19 kHz pilot : 7.5 kHz deviation (10%)
Procedure :
FM stereo
signal generator
output channel
L-CH
Level meter
reading (dB)
Level meter
connection
L-CH ®
Adjust RV4 on TU60!
for nimum reading.
R-CH L-CH
©
Adjust RV4 on TU601
for minimum reading.
L-CH stereo separation : ® —
R-CH stereo separation : © - ©
The separations of both channels should be equal.
Specification : Separation more than 28 dB
Adjustment Location : See page 18.
FM RDS S-Meter Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
FM PF signal
generator
antenna
terminal
0.01 uF
=:
Carrier frequency : 98.00 MHz
Output level 135 dB (56.2 uV)
Mode : mono
Modulation : no modulation
Procedure :
1. Set to the test mode. (See page 16.)
2. Push the [SOURCE | button and set to FM.
Display
us CICA
Add
HW
3. Push the preset [10] button.
4. Adjust RV80! so that the display indication is “16.0”.
Display
Specification : Display indication : 15.8 to 16.2
Adjustment Location : See page 18.
a47'=

MW Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch : OFF
SOURCE — MODE button : MW
AM RFF signal
generator
AM dummy
antenna (50 Q)
antenna
terminal
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level : 33 dB (44.7 nV)
Procedure :
1. Set to the test mode. (See page 16.)
2. Push the |SOURCE | button.
3. Push the |MODE| button and set to MW.
Display
4. Push the preset |3| button.
Display
5. Adjust with the volume RVI on TU601 so that the “MW”
indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0O”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Mod vl "oO rac
2 a
Adjustment Location : tuner unit (TU601)
Adjustment Location : tuner unit (TU601)
TU601 ————-+|
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV2———-+-*C) a
FM AUTO SCAN/
STOP LEVEL ADJ D |
RV801
FM RDS
S-METER ADJ
RV4
FM STEREO
SEPARATION ADJ
(NARROW)
pt
ae
oy]
48

CD SECTION
Note:
1. CD Block basically constructed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 MQ impedance.
4. Clean an objective lens by an applicator with neutral detergent
when the signal level is low than specified value with the following
checks.
Focus Bias Adjustment
Setting: This adjustment is performed with the set placed
horizontally.
oscilloscope
SERVO board
ee [Fu]
TP (RF) «—___-_—___o+
TP (RF. GND) «<———_—!o--
Procedure:
1. Connect an oscilloscope between TP (RF) and TP (RF. GND)
on the SERVO board.
Connect the power supply.
Push the RESET] button (S900) on the MAIN board.
Insert the disc (YEDS-18) and playback.
Adjust RV 1 so that the oscilloscope waveform is clear and check
RF signal level is correct or not.
Note: Clear RF signal waveform means that the sharp “= ” can be
clearly distinguished at the center of the waveform.
12 SoD
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
FF signal waveform
WV iY
VA
AA
AAA?
A
SORRY
level: 1.0 — 1.5 Vp-p
XXX
OAK
XXK
AX)
YHA
¢ When observing the eye pattern, set the oscilloscope to AC range
and raise the vertical sensitivity so that it may be easily seen.
Adjustment Location: servo board
Focus Gain Adjustment (Coarse adjustment)
This adjustment is not required unless the following parts are replaced:
¢ Optical pick-up
« RV4
Procedure:
1. Set RV4 to the standard position. (mechanical center)
2. Check whether operation noise (while noise type) caused by
the 2-axis device (lens section of the optical pick-up) is
abnormally loud.
If the operation noise is too loud, turn RV4 slightly counter-
clockwise.
¢ If the gain is too low:
Focus does not function and no music is selected.
¢ If the gain is too high:
Noise caused by scratches and dust is heard and the operation
becomes unstable.
Adjustment Location: servo board
Adjustment Location: servo board (component side)
FOCUS GAIN ADJ
RV4
°
TP
(RF. GND)
RVI
FOCUS BIAS ADJ
4G

SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
¢ (C801 MBS0574APMT-G-199-BND (SYSTEM CONTROL)
Pin Name Pin Description
LD ON Laser ON/OFF control output
FOK Focus OK signal detection input
XLAT25 CD signal processing latch output
DATA25 CD signal serial data output
XRST Reset output to CD signal processor IC.
GFS GFS signal detection input
NIL Not used. (Connect to ground in this set.)
VCC Power supply pin (+5 V)
NIL Not used. (Open)
FLS SI/NOSEI Front panel attachment detection input
LCD SO/FLS SO LCD serial data output
LCD CKO LCD serial clock output
BEEP BEEP output
NIL Not used. (Open)
SQSI Sub Q data input
NIL Not used. (Connect to ground in this set.)
SQ CKO Sub Q read clock output
UNI SI BUS system serial interface input (Not used in this set.)
UNI SO BUS system serial interface output (Not used in this set.)
BUS system serial clock input/output (Not used in this set.)
Track jump No. count input
Remote commander input
CD-TEXT data input (Not used in this set.)
Not used. (Connect to ground in this set.)
TXT CKO
CLOK25 CD signal processing serial clock output
SYSRST System reset output (Not used in this set.)
DEEMPH De-emphasis output
AMP ATT Power amplifier attenuator control output
T
MD ON CD mechanism power control output
VSS Ground
Cc Power stabilization capacitor pin
CD ON CD power control output
‘BUS ON BUS ON control output (Not used in this set.)
NIL Power control output of A/D conversion.
DVCC VREF input of D/A converter.
DVSS Ground of D/A converter.
NIL Not used. (Open)
ANGLE LCD view angle alignment output (Not used in this set.)
AVCC Analog power supply pin (+5 V)
AVRH VREF + input of A/D converter.
AVRL VREF — input of A/D converter.
AVSS Analog ground
KEY INO - 2 Key input 0 - 2
RC INO Rotary commander input 0
QUALITY Noise detection input
NIL Not used. (Connect to ground in this set.)
MPDH Tuner multi path input
S-METER S-meter voltage detection input
Vcc Power supply pin (+5 V)
NS MASK Noise detection output