Sony XR-4950X Service Manual ▷ View online
SERVICE MANUAL
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
MG-25F-136
FM/AM CASSETTE CAR STEREO
AEP Model
SPECIFICATIONS
XR-4950X
Ver 1.0 2001.04
9-873-510-11
Sony Corporation
2001D0500-1
e Vehicle Company
C
2001.4
Shinagawa Tec Service Manual Production Group
General
Outputs
Audio output
Power aerial relay control
lead
Power amplifier control
lead
Telephone ATT control
lead
Power aerial relay control
lead
Power amplifier control
lead
Telephone ATT control
lead
Tone controls
Bass
±
9 dB at 100 Hz
Treble
±
9 dB at 10 kHz
Power requirements
12 V DC car battery
(negative earth)
(negative earth)
Dimensions
Approx. 178
×
50
×
183 mm
(w/h/d)
Mounting dimensions
Approx. 182
×
53
×
162 mm
(w/h/d)
Mass
Approx. 1.2 kg
Supplied accessories
Parts for installation and
connections (1 set)
Front panel case (1)
connections (1 set)
Front panel case (1)
Design and specifications are subject to change
without notice.
without notice.
Cassette player section
Tape track
4-track 2-channel stereo
Wow and flutter
0.08 % (WRMS)
Frequency response
30 – 18,000 Hz
Signal-to-noise ratio
58 dB
Tuner section
FM
Tuning range
87.5 – 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450kHz
Usable sensitivity
8 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
66 dB (stereo),
72 dB (mono)
72 dB (mono)
Harmonic distortion at 1 kHz
0.6 % (stereo),
0.3 % (mono)
0.3 % (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
AM
Tuning range
531 – 1,602 kHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450 kHz
Sensitivity
30
µ
V
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
(sure seal connectors)
Speaker impedance
4 – 8 ohms
Maximum power output 50 W
×
4 (at 4 ohms)
2
XR-4950X
TABLE OF CONTENTS
1.
GENERAL
Location of Controls .......................................................
3
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
7
2-2. Sub Panel Assy ................................................................
7
2-3. Mechanism Deck (MG-25F-136) ...................................
8
2-4. MAIN Board ...................................................................
8
2-5. Heat Sink (2P) .................................................................
9
3.
ASSEMBLY OF MECHANISM DECK
3-1. Assembly Flow ................................................................ 10
3-2. Housing ........................................................................... 11
3-3. Arm (Suction) ................................................................. 11
3-4. Lever (LDG-A)/(LDG-B) ............................................... 12
3-5. Gear (LDG-FT) ............................................................... 12
3-6. Guide (C) ......................................................................... 13
3-7. Mounting Position of Capstan/Reel Motor (M901) ....... 13
3-2. Housing ........................................................................... 11
3-3. Arm (Suction) ................................................................. 11
3-4. Lever (LDG-A)/(LDG-B) ............................................... 12
3-5. Gear (LDG-FT) ............................................................... 12
3-6. Guide (C) ......................................................................... 13
3-7. Mounting Position of Capstan/Reel Motor (M901) ....... 13
4.
MECHANICAL ADJUSTMENTS
....................... 14
5.
ELECTRICAL ADJUSTMENTS
Tape Deck Section .......................................................... 14
Tuner Section .................................................................. 14
Tuner Section .................................................................. 14
6.
DIAGRAMS
6-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
6-2. Printed Wiring Board – MAIN Board – ......................... 17
6-3. Schematic Diagram – MAIN Board (1/2) – ................... 18
6-4. Schematic Diagram – MAIN Board (2/2) – ................... 19
6-5. Printed Wiring Board – SUB Board – ............................ 20
6-6. Schematic Diagram – SUB Board – ............................... 20
6-7. Printed Wiring Board – KEY Board – ............................ 22
6-8. Schematic Diagram – KEY Board – .............................. 23
6-9. IC Pin Function Description ........................................... 24
6-3. Schematic Diagram – MAIN Board (1/2) – ................... 18
6-4. Schematic Diagram – MAIN Board (2/2) – ................... 19
6-5. Printed Wiring Board – SUB Board – ............................ 20
6-6. Schematic Diagram – SUB Board – ............................... 20
6-7. Printed Wiring Board – KEY Board – ............................ 22
6-8. Schematic Diagram – KEY Board – .............................. 23
6-9. IC Pin Function Description ........................................... 24
7.
EXPLODED VIEWS
7-1. General Section ............................................................... 26
7-2. Front Panel Section ......................................................... 27
7-3. Mechanism Deck Section (MG-25F-136) ...................... 28
7-2. Front Panel Section ......................................................... 27
7-3. Mechanism Deck Section (MG-25F-136) ...................... 28
8.
ELECTRICAL PARTS LIST
............................... 29
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• 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
XR-4950X
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
4
Location of controls
Refer to the pages listed for details.
1 MENU button
6, 8, 9, 10, 11, 14
2 Volume control dial
3 SOURCE (TUNER/TAPE) button
3 SOURCE (TUNER/TAPE) button
6, 7, 9, 10
4 PRST +/– (cursor up/down) buttons
6, 8, 9, 10, 11, 14
During radio reception:
During radio reception:
Preset stations select 10
5 MODE (o) button 7, 8, 9, 10
During tape playback:
Playback direction change 7
During radio reception:
BAND select 9, 10
6 Display window
7 Z (eject) button (located on the front side
7 Z (eject) button (located on the front side
of the unit behind the front panel) 7
8 OPEN button 5, 7, 15
9 D-BASS button 14
q; SOUND button 13
qa OFF button* 5, 6, 7
9 D-BASS button 14
q; SOUND button 13
qa OFF button* 5, 6, 7
qs Reset button (located on the front side
of the unit behind the front panel) 5
qd SEEK/AMS –/+ (cursor left/right) buttons
6, 7, 8, 9, 10, 11, 13, 14
Seek 10
Automatic Music Sensor 7
Manual search 10
Automatic Music Sensor 7
Manual search 10
qf ENTER button
6, 8, 9, 10, 11, 14
qg Number buttons
During radio reception:
Preset number select 9, 10
During tape playback:
(1)
REP 8
* Warning when installing in a car
without ACC (accessory) position on
the ignition key switch
Be sure to press (OFF) on the unit for two
seconds to turn off the clock display after
turning off the engine.
When you press (OFF) only momentarily,
the clock display does not turn off and this
causes battery wear.
the ignition key switch
Be sure to press (OFF) on the unit for two
seconds to turn off the clock display after
turning off the engine.
When you press (OFF) only momentarily,
the clock display does not turn off and this
causes battery wear.
SOURCE
MODE
OFF
ENTER
MENU
SOUND
1
2
3
4
5
6
-SEEK/AMS
REP
OPEN
D-BASS
XR-4950X
4
XR-4950X
Installation
Precautions
•
If you mount other Sony equipment with this unit, it is better to mount this unit in the lower position.
•
There must be a distance of at least 15 cm between the cassette slot of the unit and shift lever in order to insert a
cassette easily. Choose the installation location carefully so the unit does not interfere with gear shifting and
other driving operations.
other driving operations.
•
Choose the installation location carefully so that the unit will not interfere with normal driving.
•
Avoid installing the unit in areas subject to dust, dirt, excessive vibration, or high temperatures, such as in
direct sunlight or near heater ducts.
•
Use only the supplied mounting hardware for a safe and secure installation.
Mounting angle adjustment
Adjust the mounting angle to less than 20°.
Note
To prevent malfunction, install only with the supplied screws
To prevent malfunction, install only with the supplied screws
4.
Mounting example
Installation in the dashboard
Mounting the unit in a Japanese car
You may not be able to install this unit in some makes of Japanese cars. In such a case, consult your Sony dealer.
4
max. size
5
5
×
8 mm
мaкc. paзмep
5 x 8 мм
to dashboard/center console
к пpибоpной пaнeли/цeнтpaльной
к пpибоpной пaнeли/цeнтpaльной
конcоли
to dashboard/center console
к пpибоpной пaнeли/цeнтpaльной
к пpибоpной пaнeли/цeнтpaльной
конcоли
4
max. size
5
5
×
8 mm
мaкc. paзмep
5 x 8 мм
Bracket
Кpонштeйн
Кpонштeйн
Bracket
Кpонштeйн
Кpонштeйн
Bracket
Кpон
Кpон
How to detach and attach the front panel
Before installing the unit, detach the front panel.
A To detach
Before detaching the front panel, be sure to press (OFF). Press (OPEN), then slide the front panel to the right
side, and pull out the left side.
side, and pull out the left side.
B To attach
Place the hole
A in the front panel onto the spindle B on the unit as illustrated, then push the left side in.
Установка
Меры предосторожности
• Если Вы устанавливаете эту магнитолу вместе с другой аппаратурой Sony в cтойкy, магнитолу лучше
поместить внизу.
• Расстояние между щелью кассетоприемника магнитолы и рычагом переключения передач автомобиля
должно составлять не менее 15 сантиметров, чтобы можно было легко вставлять кассету. Место для
установки магнитолы выбирайте тщательно, с тем чтобы она не мешала переключению передач и
выполнению иных операций по управлению автомобилем.
• Место для установки магнитолы выбирайте тщательно, чтобы она не мешала нормальному управлению
автомобилем.
• Не устанавливайте магнитолу там, где она будет подвержена воздействию пыли, грязи, чрезмерной
вибрации или высоких температур, например в местах, попадающих под прямые солнечные лучи или
находящихся вблизи вентиляционных решеток обогревателей.
• В целях обеспечения надежной и безопасной установки используйте лишь входящие в комплект
монтажные детали.
Допустимый угол установки
Установите магнитолу под углом не более 20°.
Пpимeчaниe
Для пpeдотвpaщeния нeпpaвильной paботы ycтaновкa должнa выполнятьcя только c иcпользовaниeм
Для пpeдотвpaщeния нeпpaвильной paботы ycтaновкa должнa выполнятьcя только c иcпользовaниeм
пpилaгaeмыx винтов 4.
Уcтaновкa aппapaтa в aвтомобилe японcкого пpоизводcтвa
B нeкотоpыx aвтомобиляx японcкого пpоизводcтвa этот aппapaт ycтaновить нeвозможно. B этом cлyчae
обpaтитecь к cвоeмy дилepy Sony.
Порядок снятия и установки передней панели
Перед установкой магнитолы снимите с нее переднюю панель.
A
Снятие панели
Прежде чем снимать переднюю панель, обязательно отключите магнитолу, нажав клавишу (OFF). Затем
нажмите (OPEN), сдвиньте переднюю панель вправо и, потянув за левую часть панели, снимите ее.
B
Установка панели
Сначала присоедините часть A передней панели к части B магнитолы, как это показано на
иллюстрации, а затем вдвиньте в паз левую часть панели до легкого щелчка.
TOYOTA
NISSAN
15
cm
A
B
c
1
2
3
Bend these claws
outward for a tight fit, if
necessary.
При необходимости
outward for a tight fit, if
necessary.
При необходимости
отогните эти
зажимные зубчики для
обеспечения более
плотной фиксации.
6
4
4
5
5 4
4
182 m
m
53 m
m
1
1
Existing parts supplied with your car
Дeтaли, вxодящиe в комплeкт
Дeтaли, вxодящиe в комплeкт
aвтомобиля
Bracket
Кpонштeйн
Кpонштeйн
Fire wall
Огнеупорная
Огнеупорная
перегородка
Dashboard
Приборная доска
Приборная доска
4
max. size
5
5
×
8 mm
мaкc. paзмep
5 x 8 мм
4
max. size
5
5
×
8 mm
мaкc. paзмep
5 x 8 мм
5
Existing parts supplied with your car
Дeтaли, вxодящиe в комплeкт
Дeтaли, вxодящиe в комплeкт
aвтомобиля
2
3
Пpимep ycтaновки
Установка магнитолы в приборной доске