CDX-V7800X - Sony Car Audio Service Manual (repair manual)

cdx-v7800x service manual
Model
CDX-V7800X
Pages
59
Size
6.79 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-v7800x.pdf
Date

Read Sony CDX-V7800X Service Manual online

1
Model Name Using Similar Mechanism
NEW
CD Drive Mechanism Type
MG-383K-121//K
Optical Pick-up Name
KSS-720A
SERVICE MANUAL
E Model
Tourist Model
CDX-V7800X
FM/AM MULTI MEDIA PLAYER
• The tuner and CD sections have no adjustments.
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
Signal format system
PAL/NTSC
Tuner section
FM
Tuning range
FM tuning interval:
50 kHz/200 kHz
switchable
87.5 – 108 MHz
(at 50 kHz step)
87.5 – 107.9 MHz
(at 200 kHz step)
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
65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.7% (stereo),
0.4% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
AM
Tuning range
AM tuning interval:
9 kHz/10 kHz switchable
531 – 1,602 kHz
(at 9 kHz step)
530 – 1,710 kHz
(at 10 kHz step)
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
30 µV
SPECIFICATIONS
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
Video output
Power aerial relay control
lead
Power amplifier control
lead
Input
Telephone ATT control
lead
Parking break 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 × 183 mm
(w/h/d)
Mounting dimensions
Approx. 182 
× 53 × 162 mm
(w/h/d)
Mass
Approx. 1.2 kg
Supplied accessories
Parts for installation and
connections (1 set)
Front panel case (1)
Card remote commander RM-X200
Design and specifications are subject to change without
notice.
Ver 1.
2
  2001.0
7
9-870-201-1
3
2001
G
0400-1
© 2001.
7
Sony Corporation
e Vehicle Company
Shinagawa Tec Service Manual Production Group
2
TABLE OF CONTENTS
1. GENERAL
About Discs ............................................................................. 3
Location of Controls ................................................................ 3
Getting Started ......................................................................... 3
CD ........................................................................................... 4
Video CD/Super VCD ............................................................. 5
Radio ....................................................................................... 6
Other Functions ....................................................................... 6
MP3 File Instruction ................................................................ 7
Connections ............................................................................. 9
2. DISASSEMBLY
2-1.   Sub Panel (CD) Assy ......................................................... 10
2-2.   CD Mechanism Block ....................................................... 10
2-3.   Main Board ....................................................................... 11
2-4.   Heat Sink ........................................................................... 11
2-5.   Chassis (T) Sub Assy ........................................................ 12
2-6.   Lever Section ..................................................................... 12
2-7.   Servo Board ....................................................................... 13
2-8.   Shaft Roller Assy .............................................................. 13
2-9.   Floating Block Assy .......................................................... 14
2-10. Optical Pick-up Block ....................................................... 14
3. DIAGRAMS
3-1.   IC Pin Descriptions ........................................................... 15
3-2.   Block Diagram –Tuner Section– ....................................... 23
3-3.   Block Diagram –CD Section– ........................................... 24
3-4.   Block Diagram –MPEG Section– ..................................... 25
3-5.   Block Diagram –Display Section– .................................... 26
3-6.   Circuit Boards Location .................................................... 26
3-7.   Printed Wiring Board –CD Mechanism Section– ............. 28
3-8.   Schematic Diagram –CD Mechanism Section (1/3)– ....... 30
3-9.   Schematic Diagram –CD Mechanism Section (2/3)– ....... 31
3-10. Schematic Diagram –CD Mechanism Section (3/3)– ....... 32
3-11. Schematic Diagram –Main Section (1/2)– ........................ 33
3-12. Schematic Diagram –Main Section (2/2)– ........................ 34
3-13. Printed Wiring Board –Main Section– .............................. 35
3-14. Schematic Diagram –Relay Section– ................................ 36
3-15. Printed Wiring Board –Relay Section– ............................. 37
3-16. Printed Wiring Board –Display Section– .......................... 38
3-17. Schematic Diagram –Display Section– ............................. 39
4. EXPLODED VIEWS
4-1.   Chassis Section ................................................................. 42
4-2.   Front Panel Section ........................................................... 43
4-3.   CD Mechanism Section (1) ............................................... 44
4-4.   CD Mechanism Section (2) ............................................... 45
4-5.   CD Mechanism Section (3) ............................................... 46
5. ELECTRICAL PARTS LIST
........................................ 47
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.
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.
3
SECTION 1
GENERAL
This section extracted
from instruction manual.
4
Page of 59
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Download Sony CDX-V7800X Service Manual (Repair Manual)

Here you can read online and download Sony CDX-V7800X Service Manual in PDF. CDX-V7800X service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CDX-V7800X Car Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.