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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/450 kHz

Usable sensitivity

8 dBf

Selectivity

75 dB at 400 kHz

Signal-to-noise ratio

66 dB (stereo), 
72 dB (mono)

Harmonic distortion at 1 kHz

0.6 % (stereo),
0.3 % (mono)

Separation

35 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

30 

µ

V

Outputs

Speaker outputs 
(sure seal connectors)

Speaker impedance

4 – 8 ohms

Maximum power output

52 W 

×

 4 (at 4 ohms)

Outputs

Audio outputs (front/rear)
Power aerial relay control 
terminal
Power amplifier control 
terminal

Inputs

Telephone ATT control 
terminal
BUS control input terminal
BUS audio input terminal
Remote controller input 
terminal
Aerial input terminal

Tone controls

Bass 

±

8 dB at 100 Hz

Treble 

±

8 dB at 10 kHz

Loudness

+8 dB at 100 Hz
+2 dB at 10 kHz

Power requirements

12 V DC car battery 
(negative earth)

Dimensions

Approx. 178 

×

 50 

×

 177 

mm (w/h/d)

Mounting dimensions

Approx. 182 

×

 53 

×

 161 

mm (w/h/d)

Mass

Approx. 1.2 kg

Supplied accessories

Card remote commander (1)
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

67 dB

61 dB

TYPE I

64 dB

58 dB

E model:

Soudi Arabia, Taiwan models:

87.5 – 108.0 MHz

E model:

531 – 1,602 kHz

Soudi Arabia, Taiwan models:

E model:

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

Soudi Arabia, Taiwan models:

E Model

2003A0500-1

C

 2003.01

Model Name Using Similar Mechanism

XR-CA440X

Tape Transport Mechanism Type

MG-25F-136

2

• 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.

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

3

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

8

2-2. Sub Panel Assy ................................................................

8

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

9

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

9

2-5. Heat Sink (2P) ................................................................. 10

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

....................... 15

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

6-1. Block Diagram – TUNER/TAPE Section – ................... 17
6-2. Block Diagram – MAIN Section – ................................. 18
6-3. Block Diagram – DISPLAY/KEY CONTROL/BUS

CONTROL/POWER SUPPLY Section – ....................... 19

6-4. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 20

6-5. Printed Wiring Board – MAIN Board – ......................... 21
6-6. Schematic Diagram – MAIN Board (1/3) – ................... 22
6-7. Schematic Diagram – MAIN Board (2/3) – ................... 23
6-8. Schematic Diagram – MAIN Board (3/3) – ................... 24
6-9. Printed Wiring Board – SUB Board – ............................ 25
6-10. Schematic Diagram – SUB Board – ............................... 25
6-11. Printed Wiring Board – KEY Board – ............................ 26
6-12. Schematic Diagram – KEY Board – .............................. 27
6-13. IC Pin Function Description ........................................... 30

7-1. Chassis Section ............................................................... 33
7-2. Front Panel Section ......................................................... 34
7-3. MAIN Board Section ...................................................... 35
7-4. Mechanism Deck Section (MG-25F-136) ...................... 36

............................... 37

3

Refer to the pages listed for details.

a

16

b

o

To change the operation.

c

d

e

f Z

(located on the front side 

of the unit, behind the front panel)

  9

g

To change the menus.

h

LIST button  12, 19, 20

i

OPEN button  7, 9

j

*

 7, 9

k

RESET button 

(located on the front side of 

the unit, behind the front panel)

  7

l

To select the source.

m

SCRL (scroll) button  18

n

See “Frequency select switch” in the 
Installation/Connections manual.

o

p

SOUND button  14

q

To enter a setting.

r

EQ7 button  16

*

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.

s

To receive preset stations, change the disc*

1

, 

skip albums*

2

, and select a menu.

*1

When an optional CD/MD unit is connected.

*2

Available only when optional CD unit with the 
MP3 file control function is connected.

t

To skip tracks, fast-forward, reverse a track, 
tune in stations automatically, find a station 
manually, and select a setting.

a

b

(1)

(2)

To store stations, receive stored stations.

c

d

e

f

<

,

g

h

i

j

k

o

l

m

M

m

n

o

Note
If the unit is turned off by pressing 

(OFF)

 for 

2 seconds, it cannot be operated with the card remote 
commander unless 

(SOURCE)

 on the unit is pressed, 

or a cassette tape is inserted to activate the unit first.

Tip
See “Replacing the lithium battery” on page 22 for 
details on how to replace the batteries.

(SEEK)

(–): to select 

leftwards/

.

(SEEK)

(+): to select 

rightwards/

>

(DISC/PRESET)

(+): to select upwards

In menu mode, the currently selectable button(s) of 
these four are indicated with a “ 

M

” in the display.

(DISC/PRESET)

(–): to select downwards

This section is extracted from
instruction manual.

4

•

This unit is designed for negative earth 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 

 and 

 power input leads

only after all other leads have been connected.

•

• Be sure to insulate any loose unconnected

wires with electrical tape for safety.

• 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

2

• Be sure to connect the earth cord before

• If you connect an optional power amplifier and do

2

1

2

• It is not necessary to connect this lead if there is

• When your car has a built-in FM/MW/SW aerial

3

4

5

• If there is no accessory position, connect to the

• When your car has a built-in FM/MW/SW aerial

6

• The power aerial control lead (blue) supplies +12 V

• When your car has built-in FM/MW/SW aerial in the

• A power aerial without relay box cannot be used

• Before connecting the speakers, turn the unit off.
• Use speakers with an impedance of 4 to 8 ohms, and

• Do not connect the speaker terminals to the car

• Do not connect the earth lead of this unit to the

• Do not attempt to connect the speakers in parallel.
• Connect only passive speakers. Connecting active

• To avoid a malfunction, do not use the built-in

• Do not connect the unit’s speaker cords to each

*

*

3