Sony CDX-M700R Service manual
CDX-M700R/M750
SERVICE MANUAL
Ver 1.1 2000. 08
Photo: CDX-M750
• The tuner and CD sections have no adjustments.
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (CDX-M750)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
19 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 1% total harmonic distortion.
Other Specifications
CD player section
System Compact disc digital audio
Signal-to-noise ratio 90 dB
Frequency response 10 – 20,000 Hz
Wow and flutter Below measurable limit
Laser Diode Properties (CDX-M750)
Material GaAlAs
Wavelength 780 nm
Emission Duration Continuous
Laser output power Less than 44.6 µW*
* This output is the value measured at a distance
of 200 mm from the objective lens surface on the
Optical Pick-up Block.
Tuner section
FM
Tuning range 87.5 – 107.9 MHz (CDX-M750)
Antenna terminal External antenna 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),
Harmonic distortion at 1 kHz
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
AM (CDX-M750)
Tuning range 530 – 1,710 kHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
system
87.5 – 108.0 MHz (CDX-M700R)
72 dB (mono)
0.6% (stereo),
0.3% (mono)
FM/MW/LW COMPACT DISC PLAYER
US Model
CDX-M750
AEP Model
UK Model
CDX-M700R
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-383V-121//K
Optical Pick-up Name KSS-720A
MW/LW (CDX-M700R)
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
Speaker impedance 4 – 8 ohms
Maximum power output 50 W × 4 (at 4 ohms)
General
Outputs Audio outputs (3)
Power antenna relay
control lead (CDX-M750)
Power aerial relay
control lead (CDX-M700R)
Power amplifier control
lead
Inputs Telephone ATT control
lead
Illumination control lead
Power requirements 12 V DC car battery
(negative ground)
– Continued on next page –
FM/AM COMPACT DISC PLAYER
CDX-M750
CDX-M700R
1
Ver 1.1 2000. 08
k
Dimensions Approx. 178 × 50 × 182 mm
(7 1/8 × 2 × 7 1/4 in.)
(w/h/d)
Mounting dimensions Approx. 182 × 53 × 163 mm
(7 1/4 × 2 1/8 × 6 1/2 in.)
(w/h/d)
Mass Approx. 1.5 kg (3 lb. 1 oz.)
Supplied accessories Card remote commander
RM-X92 (CDX-M750)
RM-X95 (CDX-M700R)
Parts for installation and
connections (1 set)
Design and specifications are subject to change without
notice.
SERVICE NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
US model:
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
optical pick-up bloc
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.
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
P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
semi-fixed resistor
AEP/UK model:
This product is classified as a CLASS 1 LASER PRODUCT.
This label is located on the bottom of the
chassis.
This label is located on the drive unit's internal
chassis.
When replacing the chassis (T) of mechanism deck which have
the “CAUTION LABEL” attached, please be sure to put a new
CAUTION LABEL (3-223-913-11) to the chassis (T).
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Ver 1.1 2000. 08
NOTE FOR THE OPENING OF THE FRONT PANEL
In this set, the front panel is lowered to below the bottom face when
it is opened.
When servicing the set, place it on a stand having a height of about
2 cm.
stand
MODEL IDENTIFICATION
CDX-M700R have 3 type models.
– MODEL NUMBER LABEL –
MODEL No. CDX-M700R
FM/MW/LW COMPACT DISC PLAYER
TABLE OF CONTENTS
1. GENERAL
Location of controls................................................................. 4
Getting Started......................................................................... 5
Setting the clock ...................................................................... 5
CD Player CD/MD Unit .......................................................... 6
Radio ....................................................................................... 7
RDS ......................................................................................... 9
DAB....................................................................................... 10
DSP........................................................................................ 11
Other Functions ..................................................................... 12
TV/Video ...............................................................................14
Connections ........................................................................... 15
2. DISASSEMBLY
2-1. Front Panel Assy (Normal)................................................ 22
2-2. Front Panel Assy (Inoperative).......................................... 22
2-3. CD Mechanism Block, Flexible Board ............................. 23
2-4. Sub Panel (CD) Sub Assy ................................................. 23
2-5. Motor Block Assy, Cam (R) Assy ..................................... 24
2-6. Main Board ....................................................................... 24
2-7. Heat Sink ...........................................................................25
2-8. Chassis (T) Sub Assy ........................................................ 25
2-9. Lever Section..................................................................... 26
2-10. Servo Board....................................................................... 26
2-11. Shaft Roller Assy .............................................................. 27
2-12. Floating Block Assy .......................................................... 27
2-13. Optical Pick-up Block ....................................................... 28
Part No. Model
3-046-061-0s TYPE1
3-046-062-0s TYPE2
3-047-828-0s TYPE3
Part No.
3. PHASE ALIGNMENT
3-1. Arm (A-L) Assy, Arm (B-L) Assy..................................... 29
3-2. Cam (L) ............................................................................. 29
3-3. Motor Block ...................................................................... 30
3-4. Alignment between Arm (A-L) Assy
and Arm (B-L) Assy .......................................................... 30
3-5. Arm (A-R) Assy, Arm (B-R) Assy .................................... 31
3-6. Cam (R) ............................................................................. 31
4. DIAGRAMS
4-1. IC Pin Descriptions ........................................................... 32
4-2. Block Diagram –CD Section–........................................... 42
4-3. Block Diagram –Tuner Section–....................................... 43
4-4. Block Diagram –Display Section–.................................... 44
4-5. Circuit Boards Location .................................................... 45
4-6. Printed Wiring Boards –CD Mechanism Section–............ 46
4-7. Schematic Diagram –CD Mechanism Section (1/2)– ....... 48
4-8. Schematic Diagram –CD Mechanism Section (2/2)– ....... 49
4-9. Printed Wiring Boards –Main Section– ............................ 50
4-10. Schematic Diagram –Main Section (1/4)– ........................ 52
4-11. Schematic Diagram –Main Section (2/4)– ........................ 53
4-12. Schematic Diagram –Main Section (3/4)– ........................ 54
4-13. Schematic Diagram –Main Section (4/4)– ........................ 55
4-14. Printed Wiring Board –Sub Section– ................................ 56
4-15. Schematic Diagram –Sub Section– ................................... 57
4-16. Printed Wiring Board –Display Section– .......................... 58
4-17. Schematic Diagram –Display Section–............................. 59
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 62
5-2. Front Panel Section ........................................................... 63
5-3. CD Mechanism Section (1) ............................................... 64
5-4. CD Mechanism Section (2) ............................................... 65
5-5. CD Mechanism Section (3) ............................................... 66
6. ELECTRICAL PARTS LIST ........................................ 67
3
CDX-M700R
SECTION 1
GENERAL
This section is extracted
from instruction manual.
CDX-M750
4
567
CDX-M700R
CDX-M7509CDX-M700R
8
CDX-M700R
10
111213
CDX-M75015CDX-M700R
14
161718
CDX-M750
19
202122
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. FRONT PANEL ASSY (NORMAL)
1 Turn on the power and open the front panel.
3 screw (panel)
4 front panel assy
(Take care not to
pull the flexible
board excessively.)
2-2. FRONT PANEL ASSY (INOPERATIVE)
8 Lift the motor block assy
slightly to make a play.
5 PTT 2.6x6
2 screw (panel)
stand
2 screw (panel)
flexible board
6 PTT 2.6x6
3 PTT 2.6x6
4 PTT 2.6x6
9
0 front panel assy
(Take care not to pull the
flexible board excessively.)
7 Lift the cam (R) assy
slightly to make a play.
1 screw (panel)
flexible board
2-3. CD MECHANISM BLOCK, FLEXIBLE BOARD
5 CD mechanism block
3 PTT 2.6x4
7 bracket (CD)
6 PTT 2.6x6
8 cover (flexible)
0 flexible board
9 CNP802
Note: When installing
the flexible board,
make the board slack
as illustrated.
1 PTT 2.6x6
2-4. SUB PANEL (CD) SUB ASSY
4 claw
3 PTT 2.6x6
2 PTT 2.6x4
4 CNP701
1 CNP805
6 sub panel (CD) sub assy
5 claw
2 PTT 2.6 x6
23
2-5. MOTOR BLOCK ASSY, CAM (R) ASSY
8
Note : Install the motor block assy and cam (R) assy in this roder.
For phase alignment between cams (L) and (R), see page 29 and 31.
5 motor block assy
3 CNP902
4 PTT 2.6x6
1 PTT 2.6x6
2 cam (R) assy
Note: Install the cam (R) assy with
the cam fully rotated in the
direction of the arrow A.
A
2-6. MAIN BOARD
6 MAIN board
5 PTT 2.6x6
ground point
4 PTT 2.6x6
ground point
1 PTT 2.6x8
3 PTT 2.6x
2 PTT 2.6x8
24
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