DOWNLOAD Sony CDX-V4800 Service Manual ↓ Size: 6.7 MB | Pages: 48 in PDF or view online for FREE

2

COMPONENTS  IDENTIFIED  BY  MARK  0  OR  DOTTED  LINE
WITH  MARK  0  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.

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,
observe from more than 30 cm away from the objective lens.

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.

If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical pick-
up block.

optical pick-up

semi-fixed resistor

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

TEST DISCS
Please use the following test discs for the check on the voltage and
the waveforms of the CD section.

YDES-18 (Part No. 3-702-101-01)
PATD-012 (Part No. 4-225-203-01)

This label is located on the bottom of the chassis.

General
Outputs

Audio outputs terminal
(front, sub/rear switchable)
Video output terminal
Power aerial relay control terminal
Power amplifier control terminal

Inputs

Parking break control terminal
Aerial input terminal
AUX input jack (stereo mini jack)

Tone controls

Low: 

±10 dB at 60 Hz (XPLOD)

Mid: 

±10 dB at 1 kHz (XPLOD)

High: 

±10 dB at 10 kHz (XPLOD)

Power requirements

12 V DC car battery (negative earth)

Dimensions

Approx. 178 

× 50 × 179 mm (w/h/d)

Mounting dimensions

Approx. 182 

× 53 × 161 mm (w/h/d)

Mass

Approx. 1.2 kg

Supplied accessories

Parts for installation and connections (1 set)
Card remote commander RM-X158

3

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.)

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 viscous (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.

Notes on CD-Rs (recordable CDs)/CD-RWs (rewritable
CDs)
This unit can play the following discs:

Type of discs

Label on the disc

Audio CD

MP3 files

• Some CD-Rs/CD-RWs (depending on the equipment used for

its recording or the condition of the disc) may not play on this
unit.

• You cannot play a CD-R/CD-RW that is not finalized*.
• You can play MP3 files recorded on CD-ROMs, CD-Rs, and

CD-RWs.

• A CD-R/CD-RW to which a session can be added can be played.

* A process necessary for a recorded CD-R/CD-RW disc to be

played on the audio CD player.

Notes on Video CDs
This unit can play the following discs:

Type of discs

Label on the disc

Video CD

VCD

A compact disc that contains moving pictures.
The picture data uses the MPEG 1 format (Video CD), worldwide
standards of digital compression technology.
Video CDs also contain compact audio data.
Sounds outside the range of human hearing are compressed while
the sounds we can hear are not compressed.

4

Location of Controls ........................................................

5

Connections .....................................................................

5

2-1.

Sub Panel Assy ................................................................

9

2-2.

CD Mechanism Block .....................................................

9

2-3.

Main Board ...................................................................... 10

2-4.

Chassis (T) Sub Assy ....................................................... 10

2-5.

Roller Arm Assy .............................................................. 11

2-6.

Chassis (OP) Assy ........................................................... 11

2-7.

Optical Pick-up ................................................................ 12

2-8.

SL Motor Assy (M902) ................................................... 12

2-9.

LE Motor Assy (M903) ................................................... 13

2-10. Servo Board ..................................................................... 13

3-1.

Block Diagram –CD Section– ......................................... 15

3-2.

Block Diagram –Main Section– ...................................... 16

3-3.

Block Diagram –Key Section– ........................................ 17

3-4.

Circuit Boards Location .................................................. 17

3-5.

Printed Wiring Boards –CD Mechanism Section– .......... 19

3-6.

Schematic Diagram –CD Mechanism Section (1/2)– ..... 20

3-7.

Schematic Diagram –CD Mechanism Section (2/2)– ..... 21

3-8.

Printed Wiring Boards –Main Section– ........................... 22

3-9.

Schematic Diagram –Main Section (1/3)– ...................... 23

3-10. Schematic Diagram –Main Section (2/3)– ...................... 24
3-11. Schematic Diagram –Main Section (3/3)– ...................... 25
3-12. Printed Wiring Boards –Key Section– ............................. 26
3-13. Schematic Diagram –Key Section– ................................. 27

4-1.

Main Section .................................................................... 34

4-2.

Front Panel Section ......................................................... 35

4-3.

CD Mechanism Section (1) ............................................. 36

4-4.

CD Mechanism Section (2) ............................................. 37

4-5.

CD Mechanism Section (3) ............................................. 38

4-6.

CD Mechanism Section (4) ............................................. 39

.................................. 40

5

This section is extracted
from instruction manual.

Refer to the pages listed for details. The 
corresponding buttons on the card remote 
commander control the same functions as those 
on the unit.

A OFF button

To power off; stop the source.

B Volume control dial/select button  10

To adjust volume (rotate); select items 
(press).

C EQ3 (equalizer) button  10

To select an equalizer type (XPLOD, 
VOCAL, CLUB, JAZZ, NEW AGE, ROCK, 
CUSTOM or OFF).

D Disc slot

To insert the disc (label side up), playback 
starts.

E Display window

F Z (eject) button

To eject the disc.

G SCRL (scroll) button  8

To scroll the display item.

H DSPL (display) button  4, 8

To change display items.

I ALBUM* +/– buttons

To skip albums (press); skip albums 
continuously (press and hold).

J

 (front panel release) button  4

CDX-V4800

qs

wa

wh

1

7

ws

wd

8

wg

wf

wl

wj

wk

qf

K SEEK –/+ buttons

CD/VCD:
To skip tracks (press); skip tracks 
continuously (press, then press again within 
about 1 second and hold); reverse/fast-
forward a track (press and hold).
Radio:
To tune in stations automatically (press); find 
a station manually (press and hold).

L SOURCE button

To power on; change the source (Radio/CD/
VCD/AUX).

M BTM button  9

To start the BTM function (press and hold).

N MODE button  9

To select the radio band (FM/MW/SW).

O RESET button (located behind the front 

panel)   4

P Frequency select switch (located on the 

bottom of the unit) 
See  F requency select switch   in the 
supplied installation/connections manual.

Q Number buttons

CD:
(1): REP  8
(2): SHUF  8
(3): SLOW  8
(4): AUDIO  9
(5): OSD  11
(6): PAUSE
To pause playback. To cancel, press again. 
Radio:
To receive stored stations (press); store 
stations (press and hold).

R SENS button

To improve weak reception: LOCAL/
MONO.

S Receptor for the card remote 

T AUX input jack  12

To connect a portable audio device.

The following buttons on the card remote 
commander have also different buttons/functions 
from the unit.

wa PBC button  9

ws ENTER button 9

wd < (.)/, (>) buttons

To control CD/VCD/Radio, the same as 
(SEEK) —/

+ on the unit.

wf VOL (volume) +/– button

To adjust volume.

wg ATT (attenuate) button

To attenuate the sound. To cancel, press 
again.

wh SEL (select) button

The same as the select button on the unit.

wj O (return) button  9

wk M (+)/m (–) buttons

To control CD, the same as (ALBUM) +/— 

on 

the unit.

wl Number buttons

To receive stored stations (press); store 
sations (press and hold).

* When an MP3 is played.

Note
If the unit is turned off and the display disappears, it 
cannot be operated with the card remote commander 
unless (SOURCE) on the unit is pressed, or a disc is 
inserted to activate the unit first.

Tip
For details on how to replace the battery, see 
“Replacing the lithium battery of the card remote 
commander” on page 14.

* AUDIO OUT SUB/REAR

(2-B)

•
•

Notes (2-B)
•  Be sure to connect the earth lead before connecting the 

amplifi er.

•  If you connect an optional power amplifi er and do not use the 

built-in amplifi er, the beep sound will be deactivated.