XR-CA420N — Sony Car Audio Service Manual (repair manual)

Model
XR-CA420N
Pages
31
Size
2.78 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
xr-ca420n.pdf
Date

View Sony XR-CA420N Service Manual online

SERVICE MANUAL
FM/MW/SW CASSETTE CAR STEREO
E Model
SPECIFICATIONS
XR-CA420N
Ver. 1.1  2006.03
Model Name Using Similar Mechanism
XR-CA420
Tape Transport Mechanism Type
MG-25F-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
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
63 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
MW
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 
µV
SW
Tuning range
SW tuning interval:
SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575
kHz)
Sensitivity
40 
µV
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450 kHz
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
Speaker impedance
4 – 8 ohms
Maximum power output 50 W 
× 4 (at 4 ohms)
General
Outputs
Audio output
Power aerial relay control
lead
Power amplifier 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)
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)
Design and specifications are subject to change
without notice.
9-873-619-02
Sony Corporation
2006C05-1
eVehicle Division
© 2006.03
Published by Sony Techno Create Corporation
2
XR-CA420N
TABLE  OF  CONTENTS
1.
GENERAL
Location of Controls .......................................................
3
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
4
2-2. Cover ...............................................................................
4
2-3. Mechanism Deck (MG-25F-136) ...................................
5
2-4. MAIN Board ...................................................................
5
2-5. Heat Sink .........................................................................
6
3.
ASSEMBLY  OF  MECHANISM  DECK
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
4.
MECHANICAL  ADJUSTMENTS
....................... 11
5.
ELECTRICAL  ADJUSTMENTS
Tape Deck Section .......................................................... 11
Tuner Section .................................................................. 11
6.
DIAGRAMS
6-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 12
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 ........................................... 20
7.
EXPLODED  VIEWS
7-1. Chassis Section ............................................................... 22
7-2. Front Panel Section ......................................................... 23
7-3. Mechanism Deck Section (MG-25F-136) ...................... 24
8.
ELECTRICAL  PARTS  LIST
............................... 25
Notes on chip component replacement
• Never reuse a disconnected chip component.
• 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-CA420N
SECTION  1
GENERAL
This section is extracted from in-
struction manual for XR-CA420.
5
Location of controls
RELEASE
SEL
MODE
SRC
OFF
D
D-BASS
MBP
6
5
4
3
2
1
BTM
DSPL
DISC
REP
SHUF
BL SKIP
ATA
MTL
ATT
SEEK
AMS
SENS
SOURCE
Refer to the pages listed for details.
Volume +/– button  7, 10
MODE (o) button
During tape playback:
Playback direction change  7, 8
During radio reception:
BAND select  9
During CD/MD playback:
CD/MD unit select  12
SRC (SOURCE) (TUNER/TAPE/CD/MD)
button  7, 9, 12
SEL (select) button  7, 10, 11, 12, 13
Display window
MBP (My Best sound Position) button
12
D (D-BASS) button  11
8 Z (eject) button  7
RELEASE (front panel release) button
6, 15
q; ATT (attenuate) button  10
qa SENS button  10
qs RESET button (located on the front side
of the unit behind the front panel)  6
qd Frequency select switch
(located on the bottom of the unit)
See “Frequency select switch” in the
Installation/Connections manual.
qf Number buttons  8, 9, 11, 13, 14
During radio reception:
Preset number select  9
During tape playback:
(3)
REP  8
(5)
BL SKIP  8
(6)
ATA  8
During CD/MD playback:
(1)
DISC –  13
(2)
DISC +  13
(3)
REP  14
(4)
SHUF  14
qg BTM/MTL (
Best Tuning Memory/Metal
)
button  8, 9
qh DSPL (display mode change) button
7, 12, 13
qj OFF button*  6, 7
qk SEEK/AMS +/– button  8, 9, 10, 13
Seek  10
Automatic Music Sensor  8, 13
Manual search  13
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) momentarily, the
clock display does not turn off and this
causes battery wear.
XR-CA420N
4
SECTION  2
DISASSEMBLY
SET
2-3. MECHANISM DECK (MG-25F-136)
(Page 5)
2-2. COVER
(Page 4)
FRONT PANEL SECTION
(Note 3)
Note 1:
The process described in      can be performed in any order.
Note 2:
Without completing the process described in      , the next process can not be performed.
Note 3:
Illustration of disassembly is omitted.
2-4. MAIN BOARD
(Page 5)
2-5. HEAT SINK
(Page 6)
• This set can be disassembled in the order shown below.
2-1.
DISASSEMBLY  FLOW
Note:
 Follow the disassembly procedure in the numerical order given.
2-2.
COVER
1
screw 
(PTT2.6 
×
 5)
2
cover
Page of 31
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Here you can view online or download Sony XR-CA420N Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony XR-CA420N Car Audio. Information contained in Sony XR-CA420N service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).