XR-CA430X - Sony Car Audio Service Manual (repair manual)

US Model

Canadian Model

2003A0500-1

C

 2003.01

Model Name Using Similar Mechanism

XR-CA400

Tape Transport Mechanism Type

MG-25F-136

Tape track

4-track 2-channel stereo

Wow and flutter

0.08 % (WRMS)

Frequency response

30 – 18,000 Hz

Signal-to-noise ratio

Tuning range

87.5 – 107.9 MHz

Antenna terminal

External antenna connector

Intermediate frequency

10.7 MHz

Usable sensitivity

11 dBf

Selectivity

75 dB at 400 kHz

Signal-to-noise ratio

65 dB (stereo), 
68 dB (mono)

Harmonic distortion at 1 kHz

0.7 % (stereo),
0.5 % (mono)

Separation

33 dB at 1 kHz

Frequency response

30 – 15,000 Hz

Tuning range

530 – 1,710 kHz

Antenna terminal

External antenna connector

Intermediate frequency

10.7 MHz/450 kHz

Sensitivity

30 

µ

V

Outputs

Speaker outputs 
(sure seal connectors)

Speaker impedance

4 – 8 ohms

Maximum power output 50 W 

×

 4 (at 4 ohms)

Outputs

Audio outputs (1)
Power antenna relay control 
terminal
Power amplifier control 
terminal

Inputs

BUS control input terminal
BUS audio input terminal 
Antenna input terminal

Tone controls

Bass 

±

10 dB at 20 Hz

Treble 

±

10 dB at 20 kHz

Power requirements

12 V DC car battery 
(negative ground)

Dimensions

Approx. 178 

×

 50 

×

 178 

mm (7

1

/

8

 

×

 2 

×

 7

1

/

8

 in.) 

(w/h/d)

Mounting dimensions

Approx. 182 

×

 53 

×

 161 

mm (7

1

/

4

 

×

 2

1

/

8

 

×

 6

3

/

8

 in.) 

(w/h/d)

Mass

Approx. 1.2 kg (2 lb 10 oz)

Supplied accessories

Parts for installation and 
connections (1 set)
Front panel case (1)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION  

23 watts per channel minimum continuous average power into 4 ohms,
4 channels driven from 20 Hz to 20 kHz with no more than 5% total harmonic distortion.

TYPE II, IV

61 dB

TYPE I

58 dB

2

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

3

Setting the clock ..............................................................

3

Installation/Connections .................................................

4

2-1. Disassembly Flow ...........................................................

8

2-2. Cover ...............................................................................

8

2-3. Mechanism Deck (MG-25F-136) ...................................

9

2-4. MAIN Board ...................................................................

9

2-5. Heat Sink ......................................................................... 10

3-1. Assembly Flow ................................................................ 11
3-2. Housing ........................................................................... 12
3-3. Arm (Suction) ................................................................. 12
3-4. Lever (LDG-A)/(LDG-B) ............................................... 13
3-5. Gear (LDG-FT) ............................................................... 13
3-6. Guide (C) ......................................................................... 14
3-7. Mounting Position of Capstan/Reel Motor (M901) ....... 14

....................... 15

Tape Deck Section .......................................................... 15
Tuner Section .................................................................. 15

6-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 15

6-2. Printed Wiring Board – MAIN Board – ......................... 16
6-3. Schematic Diagram – MAIN Board (1/3) – ................... 17
6-4. Schematic Diagram – MAIN Board (2/3) – ................... 18
6-5. Schematic Diagram – MAIN Board (3/3) – ................... 19
6-6. Printed Wiring Board – KEY Board – ............................ 20
6-7. Schematic Diagram – KEY Board – .............................. 21
6-8. IC Pin Function Description ........................................... 24

7-1. Chassis Section ............................................................... 27
7-2. Front Panel Section ......................................................... 28
7-3. Main Board Section ........................................................ 29
7-4. Mechanism Deck Section (MG-25F-136) ...................... 30

............................... 31

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

3

This section is extracted from
instruction manual.

Refer to the pages listed for details.

a SOURCE (Power on/Tape/Radio/CD/

b MODE (

o) button 

Selecting the source.

c VOL +/– button
d ATT (attenuate) button
e Display window
f

Z (eject) button  8

g SEEK/AMS button

Tape: 
Fast-forwarding, reversing a tape. 
Radio:
Tuning in stations automatically. 
Finding a station manually. 
CD (MP3 files)/MD: 
Skipping tracks.

h MBP (My Best sound Position) button  

12

i D-BASS button 12
j RELEASE (front panel release) button
k SEL (select) button

Selecting items.

l RESET button (located on the front side of 

the unit, behind the front panel)

6

m SENS button 

Storing the stations with the strongest 
signals.

n Number buttons 

Tape: 
(3): REP (Repeat) 

(5): BL SKIP (Blank Skip) 

(6): ATA (Automatic Tuner Activation)
Radio: 
Storing the desired station on each number 
button.
CD (MP3 files)/MD: 
(1): DISC – 

(2): DISC + 

(3): REP (Repeat) 

(4): SHUF (Shuffle) 
MP3 files: 
(5): ALBM – 

(6): ALBM +

o BTM/MTL (Best Tuning Memory/Metal) 

9

p DSPL (display mode change) button
q OFF (Stop/Power off) button*

*

Warning when installing in a car without 
an ACC (accessory) position on the 
ignition switch
After turning off the ignition, be sure to press 

(OFF) on the unit for 2 seconds to turn off 
the clock display.
Otherwise, the clock display does not turn off 
and this causes battery drain.

XR-CA430X

DISC

REP

SHUF BL SKIP/ ALBM

-

+/ATA MTL

–

+

The clock uses a 12-hour digital indication.

Example: To set the clock to 10:08

(DSPL) for 2 seconds.

The hour indication flashes.
1Press either side of (VOL) to set the 

2Press (SEL).

The minute indication flashes.

3Press either side of (VOL) to set the 

(DSPL).

The clock starts. 

After the clock setting is completed, the 
display returns to normal play mode.

4

*

*

• This unit is designed for negative ground 12 V

DC operation only.

• Do not get the wires under a screw, or caught

in moving parts (e.g., seat railing).

• Before making connections, turn the car

ignition off to avoid short circuits.

• Connect the yellow and red power input leads

only after all other leads have been connected.

• Run all ground wires to a common ground

• Be sure to insulate any loose unconnected

wires with electrical tape for safety.

Notes on the power supply cord (yellow)
• When connecting this unit in combination with

other stereo components, the connected car
circuit’s rating must be higher than the sum of
each component’s fuse.

• When no car circuits are rated high enough,

connect the unit directly to the battery.

1)

The numbers in the list are keyed to those in the
instructions.

Handle the bracket 

1 carefully to avoid injuring

your fingers.

2)

Notes (

2-A)

Tip (

2-B-  )

3)

1

To a metal surface of the car
First connect the black ground lead, then
connect the yellow and red power input
leads.

2

To the power antenna control lead or power
supply lead of antenna booster amplifier
Notes
• It is not necessary to connect this lead if

3

To AMP REMOTE IN of an optional power
amplifier
This connection is only for amplifiers.
Connecting any other system may damage
the unit.

4

To the +12 V power terminal which is
energized in the accessory position of the
ignition key switch
Notes
• If there is no accessory position, connect to

5

To the +12 V power terminal which is
energised at all times
Be sure to connect the black ground to it
first.

1