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Model Name Using Similar Mechanism
NEW
CD Drive Mechanism Type
MG-383V-121//K
Optical Pick-up Name
KSS-720A
SERVICE MANUAL
US Model
Canadian Model
CDX-M750
AEP Model
UK Model
CDX-M700R
CDX-M700R/M750
Photo: CDX-M750
· The tuner and CD sections have no adjustments.
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
system
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)
87.5 ­ 108.0 MHz (CDX-M700R)
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),
72 dB (mono)
Harmonic distortion at 1 kHz
0.6% (stereo),
0.3% (mono)
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
SPECIFICATIONS
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)
FM/AM COMPACT DISC PLAYER
CDX-M750
FM/MW/LW COMPACT DISC PLAYER
CDX-M700R
­ Continued on next page ­
Ver 1.2 2001. 03
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
9-870-134-12
2001C0400-1
© 2001. 3


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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 PUBLISHED BY SONY.
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.
Ver 1.1 2000. 08
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 pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
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.
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 block
semi-fixed resistor
US, Canadian model:
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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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
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
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.
Part No.
Model
3-046-061-0s
TYPE1
3-046-062-0s
TYPE2
3-047-828-0s
TYPE3
­ MODEL NUMBER LABEL ­
FM/MW/LW COMPACT DISC PLAYER
Part No.
MODEL No. CDX-M700R


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SECTION 1
GENERAL
This section is extracted
from instruction manual.
CDX-M700R
CDX-M750


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Ver 1.2 2001. 03
(CDX-M700R)