Read Sony XR-C5120RA Service Manual online
MICROFILM
SERVICE MANUAL
FM/MW/LW CASSETTE CAR STEREO
AEP Model
UK Model
SPECIFICATIONS
XR-C5120RA
Model Name Using Similar Mechanism
XR-C5100R
Tape Transport Mechanism Type
MG-25G-136
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
Cassette type
TYPE II, IV
61 dB
TYPE I
58 dB
Tuner section
FM
Tuning range
87.5 – 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz
Usable sensitivity
9 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
68 dB (mono)
Harmonic distortion at 1 kHz
0.7 % (stereo),
0.4 % (mono)
0.4 % (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
LW: 153 – 281 kHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450 kHz
Sensitivity
MW: 30
µ
V
LW: 50
µ
V
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
(sure seal connectors)
Speaker impedance
4 – 8 ohms
Maximum power output 40 W
×
4 (at 4 ohms)
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
±
8 dB at 100 Hz
Treble
±
8 dB at 10 kHz
Power requirements
12 V DC car battery
(negative earth)
Dimensions
Approx. 188
×
58
×
181 mm
(w/h/d)
Mounting dimensions
Approx. 182
×
53
×
164 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.
2
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.
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.
TABLE OF CONTENTS
1.
GENERAL
Location of controls ........................................................
3
Resetting the unit ............................................................
3
Detaching the front panel ................................................
3
Setting the clock ..............................................................
3
2.
DISASSEMBLY
.........................................................
4
3.
ASSEMBLY OF MECHANISM DECK
...........
5
4.
MECHANICAL ADJUSTMENTS
.......................
8
5.
ELECTRICAL ADJUSTMENTS
.........................
8
6.
DIAGRAMS
6-1. Block Diagram – TUNER Section – .............................. 12
6-2. Block Diagram – TAPE/MAIN Section – ...................... 13
6-3. Block Diagram – DISPLAY/
6-2. Block Diagram – TAPE/MAIN Section – ...................... 13
6-3. Block Diagram – DISPLAY/
KEY CONTROL/BUS CONTROL/
POWER SUPPLY Section – ........................................... 14
POWER SUPPLY Section – ........................................... 14
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
6-5. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 16
6-6. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 17
6-7. Schematic Diagram – MAIN Board (1/2) – ................... 18
6-8. Schematic Diagram – MAIN Board (2/2) – ................... 19
6-9. Printed Wiring Board – KEY Board – ........................... 20
6-10. Schematic Diagram – KEY Board – ............................. 21
6-11. IC Pin Function Description ........................................... 24
6-8. Schematic Diagram – MAIN Board (2/2) – ................... 19
6-9. Printed Wiring Board – KEY Board – ........................... 20
6-10. Schematic Diagram – KEY Board – ............................. 21
6-11. IC Pin Function Description ........................................... 24
7.
EXPLODED VIEWS
................................................ 28
8.
ELECTRICAL PARTS LIST
............................... 31
3
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
3
Location of controls
Refer to the pages listed for details.
1 SEEK/AMS (seek/Automatic Music
Sensor/manual search) control
6, 8, 10, 13, 19
6, 8, 10, 13, 19
2 MODE (o)button
During tape playback:
Playback direction change 6
During radio reception:
BAND select 7, 8
During CD or MD playback:
CD/MD unit select 18
3 SOURCE (TAPE/TUNER/CD/MD) button
6, 7, 8, 11, 18
4 Dial (volume/bass/treble/left-right/rear-
front control) 5, 16
5 SOUND button 16
6 Display window
7 DSPL (display mode change) button
6, 8, 9, 18
8 Z (eject) button 6
9 PTY button
RDS Programme 13
0… PRESET/DISC button
During radio reception:
Preset stations select 8
During CD/MD playback:
Disc change 19
qa` AF/TA button
9, 10, 11, 12
qs“ RELEASE (front panel release) button
4, 21
qd Reset button (located on the front side
of the unit behind the front panel) 4
qf OFF button 4, 6
qg SHIFT button
PLAY MODE 7, 8, 10, 12, 19
SET UP 5, 13, 16, 18
SET UP 5, 13, 16, 18
qh POWER SELECT switch
(located on the bottom of the unit)
See “POWER SELECT switch” in the
Installation/Connections manual.
See “POWER SELECT switch” in the
Installation/Connections manual.
qj Number buttons 8, 10, 12
qk D-BASS control 17
D-BASS
AF/TA
PTY
DSPL
DISC
PRESET
+
–
Z
OFF
1
2
3
SOURCE
MODE
SEEK / AMS
RELEASE
SOUND
OFF
SHIFT
SET UP
PLAY MODE
5
6
4
3
2
1
4
Attaching the front panel
Attach part
of the front panel to part
of
the unit as illustrated and push the left side
into position until it clicks.
into position until it clicks.
Notes
• Be sure not to attach the front panel upside
• Be sure not to attach the front panel upside
down.
• Do not press the front panel too hard against the
unit when attaching it.
• Do not press too hard or put excessive pressure
on the display window of the front panel.
• Do not expose the front panel to direct sunlight
or heat sources such as hot air ducts, and do not
leave it in a humid place. Never leave it on the
dashboard of a car parked in direct sunlight or
where there may be a considerable rise in
temperature.
leave it in a humid place. Never leave it on the
dashboard of a car parked in direct sunlight or
where there may be a considerable rise in
temperature.
Caution alarm
If you turn the ignition key switch to the OFF
position without removing the front panel, the
caution alarm will beep for a few seconds
(only when the POWER SELECT switch on the
bottom of the unit is set to the A position).
If you connect an optional power amplifier and
do not use the built-in amplifier, the beep
sound will be deactivated.
position without removing the front panel, the
caution alarm will beep for a few seconds
(only when the POWER SELECT switch on the
bottom of the unit is set to the A position).
If you connect an optional power amplifier and
do not use the built-in amplifier, the beep
sound will be deactivated.
Getting Started
Resetting the unit
Before operating the unit for the first time or
after replacing the car battery, you must reset
the unit.
Remove the front panel and press the reset
button with a pointed object, such as a
ballpoint pen.
after replacing the car battery, you must reset
the unit.
Remove the front panel and press the reset
button with a pointed object, such as a
ballpoint pen.
Note
Pressing the reset button will erase the clock
setting and some memorized functions.
Pressing the reset button will erase the clock
setting and some memorized functions.
Detaching the front panel
You can detach the front panel of this unit to
protect the unit from being stolen.
protect the unit from being stolen.
1
Press (OFF).
2
Press (RELEASE), then slide the front
panel a little to the left, and pull it off
towards you.
panel a little to the left, and pull it off
towards you.
Notes
• Be sure not to drop the panel when detaching it
• Be sure not to drop the panel when detaching it
from the unit.
• If you detach the panel while the unit is still
turned on, the power will turn off automatically
to prevent the speakers from being damaged.
to prevent the speakers from being damaged.
• When carrying the front panel with you, use the
supplied front panel case.
Reset button
(OFF)
(RELEASE)
5
Setting the clock
The clock uses a 24-hour digital indication.
Example: To set the clock to 10:08
1
Press (SHIFT), then press (2) (SET UP)
repeatedly until “CLOCK” appears.
repeatedly until “CLOCK” appears.
1
Press (4) (t).
The hour indication flashes.
2
Set the hour.
3
Press (4) (t).
The minute indication flashes.
4
Set the minute.
to go forward
to go backward
to go forward
to go backward
2
Press (SHIFT).
The clock starts.
3
Press (SHIFT).
After the clock setting is complete, the
display returns to normal playback mode.
After the clock setting is complete, the
display returns to normal playback mode.
Note
If the POWER SELECT switch on the bottom of the
unit is set to the B position, turn the power on
first, then set the clock.
If the POWER SELECT switch on the bottom of the
unit is set to the B position, turn the power on
first, then set the clock.
4
SUB PANEL, MECHANISM DECK (MG-25G-136)
MAIN BOARD, HEAT SINK
Note:
Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
1
three screws
(PTT2.6
(PTT2.6
×
8)
2
sub panel
3
connector
(CN302)
(CN302)
5
screw
(PTT2.6
(PTT2.6
×
6)
6
mechanism deck
(MG-25G-136)
(MG-25G-136)
4
flexible flat cable
(CN301)
(CN301)
1
three screws
(PTT2.6
(PTT2.6
×
8)
3
two ground point
screws
screws
5
three screws
(PTT2.6
(PTT2.6
×
8)
6
three screws
(PTT2.6
(PTT2.6
×
12)
1
screw
(PTT2.6
(PTT2.6
×
8)
5
two screws
(PTT2.6
(PTT2.6
×
8)
7
heat sink
2
rubber cap (25)
1
two screws
(PTT2.6
(PTT2.6
×
8)
4
main board