DOWNLOAD Sony CDX-M770 Service Manual ↓ Size: 8.59 MB | Pages: 80 in PDF or view online for FREE

Model
CDX-M770
Pages
80
Size
8.59 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-m770.pdf
Date

Sony CDX-M770 Service Manual ▷ View online

1
Ver 1.1  2003. 10
Model Name Using Similar Mechanism
CDX-M700R/M750
CD Drive Mechanism Type
MG-383V-121//K
Optical Pick-up Name
KSS-720A
SERVICE MANUAL
US Model
AEP Model
UK Model
E Model
CDX-M770
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS (US MODEL)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23.2 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 5% total harmonic distortion.
CD player section
Signal-to-noise ratio
90 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Laser Diode Properties (US model)
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 (US model)
87.5 – 108.0 MHz (AEP, UK, E model)
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 (US model)
Tuning range
530 – 1,710 kHz
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
30 µV
SPECIFICATIONS
MW/LW (AEP, UK, E model)
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 52 W 
× 4 (at 4 ohms)
General
Outputs
Audio outputs (front/rear)
Subwoofer output (mono)
Power antenna relay
control lead (US model)
Power aerial relay
control lead (AEP, UK, E model)
Power amplifier control
lead
FM/AM COMPACT DISC PLAYER
US Model
FM/MW/LW COMPACT DISC PLAYER
AEP, UK, E Model
– Continued on next page –
Sony Corporation
e Vehicle Company
Published by Sony Engineering Corporation
9-873-504-12
2003J04-1
© 2003. 10
2
optical pick-up block
semi-fixed resistor
SERVICE NOTES
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.
Inputs
Telephone ATT control
lead
Illumination control lead
BUS control input connector
BUS audio input connector
Antenna input connector (US model)
Aerial input connector (AEP, UK, E model)
AUX IN connector
Power requirements
12 V DC car battery
(negative ground)
Dimensions
Approx. 178 
×
 50 
×
 182 mm
(7 
1/8
 
×
 2 
×
 7 
1/4
 
in.)
(w/h/d)
Mounting dimensions
Approx. 182 
×
 53 
×
 160 mm
(7 
1/4
 
×
 2 
1/8
 
×
 6 
3/8
 
in.)
(w/h/d)
Mass
Approx. 1.5 kg (2 lb. 10 oz.)
Supplied accessories
Parts for installation and
connections (1 set)
Front panel case (1)
Card remote commander
RM-X110 (US model)
RM-X111 (AEP, UK, E model)
Rotary commander
RM-X5S
Note
This unit cannot be connected to a digital preamplifier or an equalizer.
Design and specifications are subject to change without
notice.
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.
US model:
AEP/UK model:
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).
CDX-M770
3
stand
TABLE OF CONTENTS
1. GENERAL
........................................................................... 4
2. DISASSEMBLY
2-1.   Front Panel Assy (Normal) ............................................... 16
2-2.   Front Panel Assy (Inoperative) ......................................... 16
2-3.   CD Mechanism Block, Flexible Board ............................. 16
2-4.   Sub Panel (CD) Sub Assy ................................................. 17
2-5.   Motor Block Assy, Cam (R) Assy ..................................... 17
2-6.   Main Board ....................................................................... 18
2-7.   Heat Sink ........................................................................... 18
2-8.   Chassis (T) Sub Assy ........................................................ 19
2-9.   Lever Section .................................................................... 19
2-10. Servo Board ....................................................................... 20
2-11. Shaft Roller Assy ............................................................... 20
2-12. Floating Block Assy .......................................................... 21
2-13. Optical Pick-up Block ....................................................... 21
3. PHASE ALIGNMENT
3-1.   Arm (A-L) Assy, Arm (B-L) Assy ..................................... 22
3-2.   Cam (L) ............................................................................. 22
3-3.   Motor Block ...................................................................... 23
3-4.   Alignment between Arm (A-L) Assy
    and Arm (B-L) Assy .......................................................... 23
3-5.   Arm (A-R) Assy, Arm (B-R) Assy .................................... 24
3-6.   Cam (R) ............................................................................. 24
4. DIAGRAMS
4-1.   IC Pin Descriptions ........................................................... 25
4-2.   Circuit Boards Location .................................................... 35
4-3.   Block Diagram –CD Section– ........................................... 36
4-4.   Block Diagram –Tuner Section– ....................................... 37
4-5.   Block Diagram –Display Section– .................................... 38
4-6.   Printed Wiring Boards –CD Mechanism Section– ............ 40
4-7.   Schematic Diagram –CD Mechanism Section (1/2)– ....... 42
4-8.   Schematic Diagram –CD Mechanism Section (2/2)– ....... 43
4-9.   Printed Wiring Boards –Main Section– ............................ 44
4-10. Schematic Diagram –Main Section (1/4)– ........................ 46
4-11. Schematic Diagram –Main Section (2/4)– ........................ 47
4-12. Schematic Diagram –Main Section (3/4)– ........................ 48
4-13. Schematic Diagram –Main Section (4/4)– ........................ 49
4-14. Printed Wiring Board –Sub (CD) Section– ....................... 50
4-15. Schematic Diagram –Sub (CD) Section– .......................... 51
4-16. Printed Wiring Board –Key Section– ................................ 52
4-17. Schematic Diagram –Key Section– .................................. 53
4-18. Printed Wiring Board –Display Section– .......................... 54
4-19. Schematic Diagram –Display Section– ............................. 55
5. EXPLODED VIEWS
5-1.   Chassis Section ................................................................. 58
5-2.   Cam Section ...................................................................... 59
5-3.   Main Board Section .......................................................... 60
5-4.   Front Panel (Key) Assy Section ........................................ 61
5-5.   Front Panel (Dspl) Assy Section ....................................... 62
5-6.   CD Mechanism Section (1) ............................................... 63
5-7.   CD Mechanism Section (2) ............................................... 64
5-8.   CD Mechanism Section (3) ............................................... 65
6. ELECTRICAL PARTS LIST
........................................ 66
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.
TEST MODE
1. Turn on the power.
2. Push “4” on the card remote control for 2 sec.
3. Push “5” on the control for 2 sec.
4. Push “1” on the control for 2 sec.
(The TEST MODE is entered.)
5. Push the “OPEN/CLOSE” switch on the control for 2 sec.
6. The front panel detouch position is set.
(No display appears at this time.)
7. Turn off the power and disassemble the set.
CDX-M770
4
CDX-M770
SECTION 1
GENERAL
This section is extracted
from instruction manual.
US MODEL
AEP, UK, E MODEL
Page of 80
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Sony CDX-M770 Service Manual ▷ Download

  • DOWNLOAD Sony CDX-M770 Service Manual ↓ Size: 8.59 MB | Pages: 80 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CDX-M770 in PDF for free, which will help you to disassemble, recover, fix and repair Sony CDX-M770 Car Audio. Information contained in Sony CDX-M770 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.