DOWNLOAD Sony MDX-CA790X Service Manual ↓ Size: 3.6 MB | Pages: 52 in PDF or view online for FREE

Model
MDX-CA790X
Pages
52
Size
3.6 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
mdx-ca790x.pdf
Date

Sony MDX-CA790X Service Manual ▷ View online

SERVICE MANUAL
FM/MW/LW MINIDISC PLAYER
AEP Model
UK Model
SPECIFICATIONS
MDX-CA790X
Ver 1.0  2003.03
9-877-086-01
Sony Corporation
2003C0500-1
e Vehicle Company
C
 2003.03
Published by Sony Engineering Corporation
U.S. and foreign patents licensed from Dolby Laboratories.
Model Name Using Similar Mechanism
NEW
Base Mechanism Type
MG-165A-138
Optical Pick-up Name
KMS-242E
MD Player section
Signal-to-noise ratio
90 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Tuner section
FM
Tuning range
87.5 – 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450 kHz
Usable sensitivity
9 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
67 dB (stereo), 
69 dB (mono)
Harmonic distortion at 1 kHz
0.5 % (stereo),
0.3 % (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Aerial terminal
External aerial connector
Intermediate frequency
10.7 MHz/450 kHz
Sensitivity
MW: 30 
µV
LW: 40 
µV
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 outputs (front)
Audio outputs (rear)
Power aerial relay control 
terminal
Power amplifier control 
terminal
Inputs
Telephone ATT control 
terminal
Remote controller input 
terminal
BUS control input terminal 
BUS audio input terminal 
Tone controls
Low 
±10 dB at 60 Hz 
(XPLOD) 
Mid 
±10 dB at 1 kHz 
(XPLOD)
High 
±10 dB at 10 kHz 
(XPLOD)
Power requirements
12 V DC car battery 
(negative earth)
Dimensions
Approx. 178 
×  50 ×  180 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
Front panel case (1)
Note
This unit cannot be connected to a digital preamplifier 
or an equalizer which is Sony BUS system compatible.
Design and specifications are subject to change 
without notice.
2
MDX-CA790X
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
1.
SERVICING  NOTES
...............................................
3
2.
GENERAL
Location of Controls .......................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
8
3-2. Sub Panel Assy ................................................................
9
3-3. Mechanism Deck (MG-165A-138) ................................
9
3-4. MAIN Board ................................................................... 10
3-5. SERVO Board ................................................................. 10
3-6. MD Cover Assy ............................................................... 11
3-7. Float Block ...................................................................... 11
3-8. Lever (LE23) Assy .......................................................... 12
3-9. Holder Assy ..................................................................... 12
3-10. Chucking Arm Assy ........................................................ 13
3-11. Optical Pick-up (KMS-242E) ......................................... 13
3-12. SL Motor Assy (Sled) (M902),
SP Motor Assy (Spindle) (M901) ................................... 14
4.
ELECTRICAL  ADJUSTMENTS
Test Mode ........................................................................ 15
MD Section ..................................................................... 15
Tuner Section .................................................................. 15
5.
DIAGRAMS
................................................................. 16
5-1. Block Diagram – SERVO Section – ............................... 20
5-2. Block Diagram – MAIN Section – ................................. 21
5-3. Block Diagram – PANEL/BUS CONTROL/
POWER SUPPLY Section – ........................................... 22
5-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
5-5. Schematic Diagram – SERVO Section (1/2) – ............... 24
5-6. Schematic Diagram – SERVO Section (2/2) – ............... 25
5-7. Printed Wiring Boards – SERVO Section – ................... 26
5-8. Printed Wiring Boards – MAIN Section – ..................... 27
5-9. Schematic Diagram – MAIN Section (1/3) – ................. 28
5-10. Schematic Diagram – MAIN Section (2/3) – ................. 29
5-11. Schematic Diagram – MAIN Section (3/3) – ................. 30
5-12. Printed Wiring Board – SUB Section – .......................... 31
5-13. Schematic Diagram – SUB Section – ............................. 31
5-14. Printed Wiring Board – KEY Section – ......................... 32
5-15. Schematic Diagram – KEY Section – ............................ 33
5-16. IC Pin Function Description ........................................... 34
6.
EXPLODED  VIEWS
6-1. Chassis Section ............................................................... 41
6-2. Front Panel Section ......................................................... 42
6-3. Mechanism Deck Section-1 (MG-165A-138) ................ 43
6-4. Mechanism Deck Section-2 (MG-165A-138) ................ 44
6-5. Mechanism Deck Section-3 (MG-165A-138) ................ 45
7.
ELECTRICAL  PARTS  LIST
............................... 46
TABLE  OF  CONTENTS
This label is located on the bottom of the
chassis.
This product is classified as a 
CLASS 1 LASER PRODUCT.
CAUTION
INVISIBLE
DO NOT STARE INTO BEAM OR
VIEW DIRECTLY  WITH OPTICAL INSTRUMENTS
LASER RADIATION WHEN OPEN
This label is located on the drive unit’s internal
chassis. (Refer to below figure)
Caution label
– Upper view –
During service do not take the Optical Pick-up Block apart and do
not adjust the APC circuit. If there is a breakdown in the APC
circuit (including laser diode), replace the entire Optical Pick-up
Block (including SERVO board).
3
MDX-CA790X
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.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
 Never look into the laser diode emission from right avove when
checking it for adustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
(KMS-242E).
 The laser diode in the optical pick-up block may suffer electro-
static break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform mea-
sures against electrostatic break-down sufficiently before the op-
eration. The flexible board is easily damaged and should be
handled with care.
laser-tap
OPTICAL PICK-UP FLEXIBLE BOARD
SERVICE  POSITION
In checking the key board and main board, prepare two jigs
(connection cable J-2502-011-1 and
connection cable for F/P to main J-2502-071-1).
sub board
(CN801)
mechanism deck
main board (CNP500)
servo board
(CN5)
key board
(CN900)
connect jig
(connection cable 
for F/P to main J-2502-071-1)
to the key board (CN900) and
sub board (CN801).
connect jig
(connection cable J-2502-011-1)
to the main board (CNP500) and 
servo board (CN5).
sub panel
assy
SECTION  1
SERVICING  NOTES
4
MDX-CA790X
4
Location of controls
a
SOURCE (Power on/Radio/CD
*
1
/MD) 
button
Selecting the source
b
SEL (select) button
Selecting items.
c
Volume +/– button
d
Display window
e
SEEK +/– button
To skip tracks, fast-forward, reverse a track, 
tune in stations automatically, find a station 
manually.
f
DSPL (display mode change) button
g
OPEN button
h
DSO button
i
ATT (attenuate) button
j
MODE button
Changing the operation
k
AF button
l
SENS/BTM button
m
Number buttons 
Radio: 
Storing the desired station on each number 
button.
MD/CD*
1
:
(1)
: DISC –
*
1
(2)
: DISC +
*
1
(3)
: REP
(4)
: SHUF
(5)
: GP
*
2
/ALBM
*
3
(6)
: GP
*
2
/ALBM
*
3
+
n
PTY (programme type) /LIST
*
1
 button 
o
RESET button 
(located on the front side of 
the unit, behind the front panel)
p
TA button
q Z
 (eject) button 
(located on the front side 
of the unit, behind the front panel)
r
OFF (Stop/Power off) button
*
4
s
Receptor for the card remote 
commander
t
EQ3 button
*1 When an optional MD/CD unit is connected.
*2 Available only when an MD containing 
groups is inserted in this unit.
*3 Available only when an optional CD unit with 
the MP3 file control function is connected.
*4
Warning when installing in a car without 
an ACC (accessory) position on the 
ignition switch
After turning off the ignition, be sure to press 
and hold 
(OFF)
 on the unit until the display 
disappears
.
Otherwise, the display does not turn off and 
this causes battery drain.
LIST
DISC
GP/ALBM
AF
SENS
BTM
REP
SHUF
SEL
AT
T
MODE
SO
UR
CE
PTY
TA
1
2
3
4
5
6
OFF
OPE
N
DSO
EQ3
SEEK
DS
PL
SECTION  2
GENERAL
This section is extracted from
instruction manual.
2
A
B
AUDIO OUT REAR
BUS AUDIO IN
BUS CONTROL IN
BUS AUDIO IN
BUS CONTROL IN
Source selector*
Signalquellenwähler*
Sélecteur de source*
Selettore di fonte*
Geluidsbronkiezer*
XA-C30
not supplied
nicht mitgeliefert
non fourni
non in dotazione
niet bijgeleverd
AUDIO OUT FRONT
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Sony MDX-CA790X Service Manual ▷ Download

  • DOWNLOAD Sony MDX-CA790X Service Manual ↓ Size: 3.6 MB | Pages: 52 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony MDX-CA790X in PDF for free, which will help you to disassemble, recover, fix and repair Sony MDX-CA790X Car Audio. Information contained in Sony MDX-CA790X Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.