Sony CDX-R88 User manual

SERVICE MANUAL
HIDE-AWAY UNIT
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
11 watts per channel minimum continuous average power into
4 ohms, both channels driven from 30-20,000 Hz with no more
than 1% total harmonic distortion.
OTHER SPECIFICATIONS
Power amplifier section (inside of the hide-
away unit)
Outputs 2 Line outputs
Inputs Auxiliary inputs
Maximum power output
25 watts per channel at
4 ohms
Bass +8 dB (100 kHz)
Treble +8 dB (10 kHz)
Tone controls
CD player section
System
system
Laser Diode Properties
Material: GaAlAs
Wavelength: 780 nm
Emission Duration:
Continuous
Laser output power:
Less than 44.6 p.W*
*This output is the value
measured at a distance of
about 200 mm from the
objective lens surface on the
Optical Pick-up Block.
MICROFILM
Compact disc digital audio
US Model
Canadian Model
AEP Model
E Model
CDX-R88:
US Model
CDX-R66:
Frequency response :
5- 20,000 Hz+3 dB
Harmonic distortion
0.008% (1 kHz)
Dynamic range 90 dB
Signal to noise ratio
85 dB
Wow and flutter
General
Below measurable limit
Power requirements
Current drain
12 V DC car battery
(negative ground)
800 mA (CD playback)
2 A (during disc loading or
eject)
Operating temperature
Dimensions
Weight
— 10°C-50°C (15°F - 120°F)
CD player:
Approx. 178 x 50 x 144 mm
(w/h/d) (71% x 2 x 5% in.)
Hide-away unit:
Approx. 178 x 30 x 180 mm
(w/h/d)
(71% x 11516 x 714 in.)
including projecting. parts
and controls
Approx. 2.5 kg (5 Ib 8 oz)
incl. hide-away unit
— Continued on page 2 —
FM/AM
COMPACT
DISC
PLAYER
SON
Y.

CDX-R88/R66
Tuner section (inside of the hide-away unit)
FM tuner section AM tuner section
Tuning range
{
87.9 — 107.9 MHz {US,
Canadian models}
87.5 — 108 MHz {AEP,
E models)
§31- 1,620 kHz (at 9 KHz)
530 - 1,620 kHz (at 10 kHz;
adjustable with the model
only for E model}
Antenna terminal
FM/AM external
antenna connector
67 dB (stereo)
intermediate frequency J 10.7 MHz 450 KHz
Pern Usable sensitivity {| 11.2 dBf (1.0 x.V/75 ohms)
Sensitivity — 28 Vv
bs | at 50 dB quieting 16.4 dBf (1.8 .V/75 ohms)
Selectivity 75 dB at +400 kHz —
Signal-to-noise ratio 70-08 (monaural 55 dB
t
Harmonic distortion at 1 kHz
0.2% (monaural)
0.3% (stereo)
0.3%
Stereo separation
40 dB
[ Frequency response
| 20H2- 15,000 Hz +3.dB
FEATURES
eA DIN sized mobile CD player and a
hide-away unit in which FM/AM tuner,
power amplifier ana power supply
section are combined.
¢ Fader-control to adjust the volume of
the front and rear speaker for
4-speaker system.
¢ Auxiliary inputs to connect an optional
cassette car stereo.
© Quick recovery from sound skipping.
Even if strong vibration may cause
sound skipping, the player can
relocate the point where the play was
interrupted.
¢Maximum power output of 25 watts
per channel.
CAUTION
Use of controls or adjustments or performance
of procedures other than those specified herein
may result in hazardous radiation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
A 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
UNE MARQUE A SUR LES DIAGRAMMES SCHE-
MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES
POUR LA SECURITE DE FONCTIONNEMENT. NE REM-
PLACER CES COMPOSANTS QUE PAR DES PIECES
SONY DONT LES NUMEROS SONT DONNES DANS CE
MANUEL OU DANS LES SUPPLEMENTS PUBLIES PAR
SONY.
TABLE OF CONTENTS
Section Title Page
Specifications .................00000. 1
POatures. cic cad in ke oe wok he ate da bed te e 2
Servicing Note ............ 0000 eee 3
Précautions’ +... 3-086 sce ce gm es 3
Installation and Connections. ............. 4
Location and Function of Controls ......... 6
How to Set the Clock .................. 8
Memory Preset Tuning.................. 9
1. DISASSEMBLY
]-1. Removal ...........000 cece cues 10
2. ELECTRICAL ADJUSTMENTS
HIDE-AWAY SECTION ................ 15
FM Discriminator Alignment ........... 15
FM Auto-scan Stop Level Adjustment ..... 16
AM Auto-scan Stop Level Adjustment ..... 16
FM Stereo Separation Adjustment ........ 17
CD PLAYER SECTION ................ 18
PLL Free Run Frequency Adjustment ..... 18
Focus Offset Adjustment .............. 19
Tracking Offset Adjustment ............ 19
Tracking Gain Adjustment
(rough adjustment) .................. 20
Focus Gain Adjustment
(rough adjustment) .................. 21
Semiconductor Lead Layouts ............. 22
3. DIAGRAMS
3-1. Mounting Diagram
— Hide-away Section— ............. 23
3-2. Schematic Diagram
— Hide-away Section— ............. 26
3-3. Mounting Diagram
— CD Player Section— ............. 31
3-4. Schematic Diagram
— CD Player Section— ..........,.. 35
4. EXPLODED VIEWS AND
PARTS LIST ................,.4. 41
5. ELECTRICAL PARTS LIST........-. 48
Trouble Checks . 2... 0600.04 cee ee 56

SERVICING NOTES
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 poten-
tial 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.
CDX-R88/R66__
Flexible Circuit Board Repairing
1. Keep the temperature of the soldering iron at
270° + 10°C during repairing.
You can maintain the temperature of the
soldering iron around 270°C by using the ther-
mal controller as illustrated on the right.
2. Do not touch the soldering iron more than 4
seconds or 3 times on the same conductor of
the circuit board.
3. Do not apply force on the conductor when
soldering or unsoldering.
Tip of soldering iron
good
i>
wrong
eo
ams
=
PRECAUTIONS
¢ Before operating the unit for the first
time or after replacing the battery,
press the reset button with a pencil,
etc., then start operating the unit.
if your car was parked in direct
sunlight and there was a considerable
rise in temperature inside the car,
allow the unit to cool off before
operating.
*If no power is being supplied to the
unit, check the connections first. If
everything is in order, check the fuse.
*!f no sound comes from the speakers
of a 2-speaker system, set the FADER
control to the center position.
*When transporting the unit, keep the
unit horizontal.
Notes on moisture condensation
On a rainy day or in a very damp area,
moisture may condense on the lenses
inside the unit.
Should this occur, the unit will not
operate. In this case, remove the disc
and wait for about an hour unti! the
moisture evaporates.
NOTES ON COMPACT DISCS
Handle the disc by its edge, and to
keep the disc clean, do not touch the
rainbow colored surface.
This way
Do not stick paper or tape on the
labeled surface.
Not this way
Se
Do not expose the disc to direct
sunlight or heat sources such as hot air
ducts, or leave it in a car parked in the
direct sunlight where there can be a
considerable rise in the temperature.
(% =
WY)
Not this way
Before playing, clean the disc with an
optional cleaning cloth.
Wipe the disc in the direction of the
arrows.
Do not use solvents such as benzine,
thinner, commercially available cleaners
or antistatic spray intended for analog
discs.

CDX-R88/R66
| INSTALLATION AND CONNECTIONS |
MOUNTING HARDWARE
Supplied with the CD player CDX-R88
i
£
®
eee
®O ® ®D
yy &
xf x2 xt
xt
Supplied with the stereo cassette player XK-8
® mC) ‘2
®
@5 x 20 O
x4
«4
INSTALLATION
PRECAUTIONS
* Choose the mounting location carefully so that the unit will not interfere with the normal
driving functions of the driver.
* Avoid installing the unit where it would be subject to high temperatures, such as from direct
sunlight or from hot air from the heater, or where it would be subject to dust, dirt or
excessive vibration.
¢ Use only the supplied mounting hardware for a safe and secure installation.
MOUNTING EXAMPLE
Installation in the dashboard
Use the mounting hardware supplied with the CDX-R88/R66 for
mounting the CD player only
Choose the way ‘A! or 'B
installation under the dashboard
using the mounting hardware
supplied with the CDX-R88/R66.
For CDX-R88/R66 only
Transit screw
Be sure to remove the transit screw from
the top of the unit. Retain the screw for
future transportation as illustrated below.
¥
@
— Retain the
S__ screw here. os
SSS Le
Bw 2 TJ OL
Pa
Screwdriver
For XK-8 only
Mount the XK-8 with an angle less than 30°
from the horizontal level.
Mounting exampie
Mounting angle adjustment
To keep balance of the internal anti-shock
mechanism, adjust the mounting angle of
the CD player according to that of the
mounting position.
¢ If the mounting angle is less than 20°
from the horizontal, no ajustment is
necessary.
elf it is between 20° and 40°, turn the
selector (see illustration) clockwise until it
stops.
7 0° 20°
Mounting Gj —20° 40°
angie selector KS
Lb,
Mounting
WA angle
5G
To return the selector to the original *
position, turn it counterclockwise while
pressing it with a screwdriver
Front speaker
XK-8 of a graphic equatizer
(under dashboard)
|
CD player of CDX-R88 =, ----——
{in dashboard) Sere
=|
Hide-away unit of CDX R68
(under seat)
Rear
| | speaker
Front speaker
player XK-8.
Use the mounting hardware supplied with the stereo cassette
1 2
CD player
of CDX-R88/R66
Bend these claws, if necessary.
Dashboard
TO LATCH THE PART @)
CDX R88 or
aD COX-R66
(
This prevents your car stereo set from being stolen.
Detach it when operating the unit.
CORD ATTACHMENT
Hide-away unit of
COX R88 or
Attach the
part © to
secure the unit
Ww
cio
To remove, push in the clips and pull it out.
1 Mark the locations of the holes on the bottom of the dashboard using th part @ as a
template.
2 Drill 3mm (1% in) bolt holes.
3 secure the pieces of part @) which are broken off to the bottom of the dishfboard.*
4
Secure
the
unit
to
part
™
*If the dashboard or the firewall is thin or made of plastic or a similar material. Secuy the unit with parts
©; and (©. tf it is made of metal plate, ©) are not necessary.
Notes
* Be sure to use the supplied bolts (0) for mounting part @ on the unit. Long, folts will
damage the unit.
* Be careful not to damage wiring or equipment on the other side of the firera) I.
—4—

CDX-R88/R66
CONNECTIONS
CONNECTION
DIAGRAM
According to the unit you have, select the appropriate connection from the following three
CAUTION examples.
This unit is designed for negative ground 12 V DC operation only. (Example 1} A detailed diagram of this example is shown below
© Before making connections, disconnect the ground terminal of the car battery to avoid short CDX-R88 or CDX-REG
circuits. micas)
* Connect the red power input lead only after all other leads are connected. And be sure to ‘Sleraaaaeaane ir ideceay Fraai
connect it to the Positive 12 V power terminal. It will be energized when the ignition key is player XK-8, etc. CD player inate speaker
set to the accessory position.
© Run all ground wires to a common ground point. Feseeniacomn a nn
* Notes for the CD player only: Be sure to press the reset button after connection is
completed.
Graphic Sub
Notes on speaker connection Wooler
* Use speakers with an impedance of 4 to 8 ohms, and with adequate power handling * Combined with a tuner and a power amplifier
Capacities. Otherwise, the speakers may be damaged.
* Do not connect the © terminals of the speaker system to the car chassis, and do not (Exampie 2)
connect the right speaker with that of the left speaker. CDX-R88 or CDX-R66
*Do not attempt to connect the speakers in parallel.
Front
On power antenna connection (for CD player only) speaker
Connect the power antenna retay contro} jead to the power antenna relay box.
To raise the antenna, press the TUNER button of the CD player to turn on the radio or insert a
disc.
To retract the antenna, press the TUNER again to turn the radio off or press the & button to Rear
remove the disc. speaker
Note: A power antenna without relay control box cannot be used with this unit.
Memory hold connection (for CD player only)
When the yellow power input lead is connected as shown below, power will be always { i aaa
supplied to the memory circuit, even when the ignition key is switched off. Gideawa
CD player ae y Speaker
Diagram of example
4- or 2-speaker connection with the CD player and a cassette car stereo
ted (red, white striped): power input jead
yellow: power input lead Rear speaker
orange (orange, white striped): lighting lead
blue (blue, white striped): power amplifier contro! lead
black: ground wire
gray: remote control lead
Front speaker
Rear
speaker
CD
player
CDX R88 or CDX REE
ACC SW
fed, white
striped
Car antenna
Power amplifier
Front speaker
yellow
to meta! point of a car
Hide away unit
CDX-R88 or CDX REE
orange.
white
striped
L.
PY Fuse (1 A)
gO
to the lighting contro! lead
to the ® 12 V power terminal
orange, white striped which is energized in the
Fuse accessory position of the
ignition key
to power antenna
relay control box
Fuse (6.3 A)
1) Connecting cord supplied with the power amplitier

CDX-R88/R66
LOCATION AND FUNCTION OF CONTROLS
(1) BAS (bass) control
Slide towards + to increase the bass
response and towards — to decrease
it.
(2) TRE (treble) control
Slide towards + to increase the
treble response and towards — to
decrease it.
[3] Dise insertion slot
(4]LOCAL button and indicator
{(5] & (eject) button
For improved reception
¢ To receive a weak FM station, press MONO.
(The indicator on the button illuminates.) The
FM stereo broadcast is received in monaural,
but the noise may be reduced.
© To receive very strong FM/AM station or to
receive an AM station at night, press LOCAL.
(The indicator on the button illuminates.)
When a compact disc is inserted during reception
The radio is turned off.
(6) Fader control
Turn upwards to decrease the volume
of the rear speakers or downwards to
decrease the volume of the front
speakers.
Power switch/VOL (volume)/PULL
BAL (balance) control
Depress to turn on the unit. Press
again to turn off.
Turn clockwise for more volume.
While pulling out the control, turn it
to acjust the balance of the right and
left channels.
(8] MONO button and indicator
[9] “<q BE /SEEK buttons
Used for lacating the beginning of a
desired selection or for automatic
tuning
Display during radio reception
Each time the DISPLAY button is pressed, the
display indication will be changed as follows.
Current time
Receiving frequency
8g. i0

\
CDX-R88/R66 |
(i0}Reset button
Press this button with a pencil or
similar object after battery
replacement or when no button or
control functions.
{1} MANU (manual)/search buttons
Used for manual tuning , for CD
search operation , or for setting
the clock
{12 Band indicators
(13] Display window
(4) STEREO indicator
15] DISPLAY button
Press repeatedly to change the
display information.
Display during play
Each time the DISPLAY button is pressed, the
display indication will change as follows.
Elapsed
playing time
of the of the
selection selection Current time
Track number
The unit will automatically enter the stop mode
when...
* the TUNER button is pressed during disc play.
* the car ignition key is turned off during play
and the next time, after more than 15 seconds
have passed, the key is set to IGN (ignition) or
ACC (accessory) position.
(t§}PLAY/STOP button and indicator
( mw)
f7) TUNER button
fis} BAND button
(3] Preset buttons
Press to memorize the frequency or
to receive a preset station.
(20) MEM (memory)/‘» button
Used for locating the beginning of
the disc, for memorizing the tuned
station, or for setting the clock
Important
Since the CD system offers a wide dynamic
range, the peaks of the high level inputs are
recorded with high fidelity, and the noise level is
very low. Do not turn up the volume while
listening to a portion with no audio signals or
very low level inputs. If you do, the speakers may
be damaged when a peak level portion is played.
To stop searching
Release the button.
The desired point will be found by observing the
display window or monitoring the high-speed
sound (only during play).
Keeping the »» button pressed
The time counter displays “- -” when you have
passed the end of the disc. To return to a normal
display, press e<@ Or <q button.

CDX-R88/R66 |
HOW TO SET THE CLOCK
Power. switch MEM/ lL»
Hour Minute
Before setting the clock To set hour digits
¢ Turn on the car ignition key. While pressing MEM/t», press —.
Depress the power switch.
¢ Make sure that no disc is inserted. To set minute digits
¢ Make sure that the tuner is turned off. | While pressing MEM/‘», press +.
Using -— and + buttors
Each time the button is pressed, the digits
increase by one. To change the digits quickly,
keep it pressed. Release it where you want to
stop.
When - is pressed continuously
After 12, the indication returns to 1.

| " CDX-R88/R66
MEMORY PRESET TUNING
Once a station is memorized, single button operation allows you to tune in
that station easily.
TO PRESET A STATION
1 Tune in a desired station using automatic or manual tuning .
2 Press MEM.
3
Press
the
desired
preset
button
while
the
displayed
frequency
indication
is
flickering.
The
frequency
is
memorized.
4
Repeat
steps
1
to
3
to
preset
all
the
desired
stations.
For
each
preset
button,
one
FM1,
one
FM2
and
one
AM
station
can
be
memorized
in
the
desired
order.
TO RECEIVE A MEMORIZED STATION
1 Select the desired band.
2 Press the desired preset button.
Note
The frequency indication on the display stops
flickering in about 5 seconds. If this happens, the
preset operatian cannot be made. To preset the
station, press the MEM button again.
When a new frequency of the same band is
memorized
The previous memorized frequency will be erased.
ON AM TUNING INTERVAL (E model only)
The interval is factory-set according To change the AM tuning interval
to the AM frequency allocation of (adjustable only with E model)
your country. 1 Disconnect the yellow power input
lead, and make sure that nothing
9 kHz area | European, Asian, African is displayed on the display
and Ocean countries window.
North, Central and Set the AM tuning interval selector
South America located at the bottom of the CD
| 10 kHz area
player to the proper position. Use
a ball-point pen or a similar object.
If, however, AM frequency allocation
might be different from that shown
in the list, change the AM tuning
interval.

CDX-R88/R66
SECTION 1
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
1-1. REMOVAL
LID (UPPER/LOWER) AND FRONT PANEL @ transport screw
Assemble the TRE/BAS volumes and @
knobs matching in the arrow direction.
TRE/BAS volume | _® @ PTT2.6x4
© cover
fupper)
spacer (A)
Ke
@ VOL knob
front panel
8 cover @ = Remove the claw
(lower) by pushing in the
arrow direction.
CHASSIS
earth read O Psv2.6x8 @ PTT26x4
blind panel
chassis
© 9772.6 <4 eermaa
a)
wyP 2 7 ‘Z