XR-CA440H - Sony Car Audio Service Manual (repair manual)

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

FM tuning interval:
50 kHz/200 kHz switchable
87.5 – 108.0 MHz
(at 50 kHz step)
87.5 – 107.9 MHz
(at 200 kHz step)

Aerial terminal

External aerial 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

MW tuning interval:
9 kHz/10 kHz switchable
531 – 1,602 kHz
(at 9 kHz step)
530 – 1,710 kHz
(at 10 kHz step)

Sensitivity

30 

µ

V

Tuning range

SW tuning interval:
SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 
kHz)

Aerial terminal

External aerial connector

Intermediate frequency

10.7 MHz/450 kHz

Sensitivity

40 

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
Power aerial relay control 
lead
Power amplifier control lead

Inputs

BUS control input terminal
BUS audio input terminal 
Aerial input terminal

Tone controls

Bass 

±

9 dB at 100 Hz

Treble 

±

9 dB at 10 kHz

Power requirements

12 V DC car battery 
(negative earth)

Dimensions

Approx. 178 

×

 50 

×

 178 

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)
Front panel case (1)

Note
This unit cannot be connected to a digital preamplifier 
or an equalizer.

Design and specifications are subject to change 
without notice.

TYPE II, IV

61 dB

TYPE I

58 dB

E Model

2002J0500-1

C

 2002.10

Model Name Using Similar Mechanism

XR-CA440X

Tape Transport Mechanism Type

MG-25F-136

2

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

3

Setting the Clock .............................................................

3

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

4

2-2. Collar ...............................................................................

4

2-3. Cover ...............................................................................

5

2-4. Mechanism Deck (MG-25F-136) ...................................

5

2-5. MAIN Board ...................................................................

6

2-6. Heat Sink .........................................................................

6

3-1. Assembly Flow ................................................................

7

3-2. Housing ...........................................................................

8

3-3. Arm (Suction) .................................................................

8

3-4. Lever (LDG-A)/(LDG-B) ...............................................

9

3-5. Gear (LDG-FT) ...............................................................

9

3-6. Guide (C) ......................................................................... 10
3-7. Mounting Position of Capstan/Reel Motor (M901) ....... 10

....................... 11

Tape Deck Section .......................................................... 11
Tuner Section .................................................................. 11

6-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 13

6-2. Printed Wiring Board – MAIN Board – ......................... 14
6-3. Schematic Diagram – MAIN Board (1/3) – ................... 15
6-4. Schematic Diagram – MAIN Board (2/3) – ................... 16
6-5. Schematic Diagram – MAIN Board (3/3) – ................... 17
6-6. Printed Wiring Board – KEY Board – ............................ 18
6-7. Schematic Diagram – KEY Board – .............................. 19
6-8. IC Pin Function Description ........................................... 21

7-1. Chassis Section ............................................................... 24
7-2. Front Panel Section ......................................................... 25
7-3. MAIN Board Section ...................................................... 26
7-4. Mechanism Deck Section (MG-25F-136) ...................... 27

............................... 28

• 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 Frequency select switch (located on 

the bottom of the unit)
See “Frequency select switch” in the 
Installation/Connections manual.

p BTM/MTL (Best Tuning Memory/Metal) 

button  9

q DSPL (display mode change) button
r 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.

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

SET

2-4. MECHANISM DECK (MG-25F-136)

(Page 5)

2-2. COLLAR

(Page 4)

2-3. COVER

(Page 5)

FRONT PANEL SECTION

(Note 3)

The process described in      can be performed in any order.

Without completing the process described in      , the next process can not be performed.

Illustration of disassembly is omitted.

2-5. MAIN BOARD

(Page 6)

2-6. HEAT SINK

(Page 6)

• This set can be disassembled in the order shown below.

 Follow the disassembly procedure in the numerical order given.

2

A

B

3

Remove the bracket 
in the direction of arrow 

A

.

4

Remove the bracket 
in the direction of arrow 

B

.

5

collar

1

screw
(K5 

×

 8)

1

screw
(K5 

×

 8)