CDX-C6750, CDX-C7500 - Sony Car Audio Service Manual (repair manual)

Model
CDX-C6750 CDX-C7500
Pages
54
Size
5.09 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-c6750-cdx-c7500.pdf
Date

View Sony CDX-C6750 / CDX-C7500 Service Manual online

– 1 –
Model Name Using Similar Mechanism
CDX-C5750/C5850
CD Drive Mechanism Type
MG-363T-121
Optical Pick-up Name
KSS-521A
SERVICE MANUAL
US Model
Canadian Model
CDX-C6750
E Model
CDX-C7500
CDX-C6750/C7500
FM/AM COMPACT DISC PLAYER
AUDIO POWER SPECIFICATIONS (US, Canadian Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
17 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
Material
GaAlAs
Wavelength
780 nm
Emission Duration
Continuous
Laser output power
Less than 44.6 
µ
W*
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
US, Canadian model:
87.5 – 107.9 MHz
E model:
FM tuning interval:
50 kHz/200 kHz switchable
87.5 – 108.0 MHz
(at 50 kHz step)
87.5 – 107.9 MHz
(at 200 kHz step)
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz
Usable sensitivity
12 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),
0.5% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
SPECIFICATIONS
Photo: CDX-C6750
AM
Tuning range
US, Canadian model:
530 – 1,710 kHz
E model:
AM tuning interval:
9 kHz/10 kHz switchable
531 – 1,602 kHz
(at 9 kHz step)
530 – 1,710 kHz
(at 10 kHz step)
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
30 
µ
V
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
Speaker impedance
4 – 8 ohms
Maximum power output 40 W 
×
 4 (at 4 ohms)
– Continued on next page –
MICROFILM
– 2 –
TABLE OF CONTENTS
1. GENERAL
Location of controls ................................................................ 3
Getting Started ........................................................................ 3
Setting the clock ..................................................................... 3
CD Player ................................................................................ 3
Radio ....................................................................................... 4
Other Functions ...................................................................... 5
CD/MD Unit ........................................................................... 6
TV/Video ................................................................................ 7
Connections ............................................................................ 9
2. DISASSEMBLY
2-1. Cover ................................................................................. 11
2-2. Front Panel Assy ............................................................... 11
2-3. Sub Panel Assy .................................................................. 12
2-4. CD Mechanism Block ....................................................... 12
2-5. Main Board ....................................................................... 13
2-6. Heat Sink ........................................................................... 13
2-7. Chassis (T) Sub Assy ........................................................ 14
2-8. Lever Assy ......................................................................... 14
2-9. Servo Board ....................................................................... 15
2-10. Roller Assy ........................................................................ 15
2-11. Chassis (OP) (O/S) Assy ................................................... 16
2-12. Optical Pick-up Block ....................................................... 16
3. ELECTRICAL ADJUSTMENTS
Tuner Section ........................................................................ 17
CD Section ............................................................................ 19
4. DIAGRAMS
4-1. IC Pin Description ............................................................. 20
4-2. Block Diagram –CD Section– ........................................... 23
4-3. Block Diagram –Main Section– ........................................ 25
4-4. Circuit Boards Location .................................................... 27
4-5. Printed Wiring Boards –CD Mechanism Section– ........... 29
4-6. Schematic Diagram –CD Mechanism Section– ................ 31
4-7. Printed Wiring Board –Main Section– .............................. 33
4-8. Schematic Diagram –Main Section (1/2)– ........................ 37
4-9. Schematic Diagram –Main Section (2/2)– ........................ 39
4-10. Printed Wiring Board –Display Section– .......................... 41
4-11. Schematic Diagram –Display Section– ............................. 43
4-12. Printed Wiring Board –Relay Section– ............................. 45
4-13. Schematic Diagram –Relay Section– ................................ 47
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 52
5-2. Front Panel Section ........................................................... 53
5-3. CD Mechanism Section (1) ............................................... 54
5-4. CD Mechanism Section (2) ............................................... 55
5-5. CD Mechanism Section (3) ............................................... 56
6. ELECTRICAL PARTS LIST
........................................ 57
SERVICE NOTE
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
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.
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, observe
from more than 30 cm away from the objective lens.
NOTES ON PICK-UP FLEXIBLE BOARD
The pick-up flexible board in this set is secured to the optical pick-up
with an adhesive tape. Once the tape is removed, an adhering force
becomes weak, and it cannot be reused.
Therefore, if the optical pick-up is replaced, replace also the pick-up
flexible board with a new one.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
!
  OR  DOTTED  LINE
WITH  MARK  
!
  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.
General
Outputs
Line outputs (2)
Power antenna relay
control lead
Power amplifier control
lead
Telephone ATT control
lead
Tone controls
Bass 
±
8 dB at 100 Hz
Treble 
±
8 dB at 10 kHz
Power requirements
12 V DC car battery
(negative ground)
Dimensions
Approx. 178 
×
 50 
×
 185 mm
(7 
1/8
 
×
 2 
×
 7 
3/8
 
in.)
(w/h/d)
Mounting dimensions
Approx. 182 
×
 53 
×
 162 mm
(7 
1/4
 
×
 2 
1/8
 
×
 6 
1/2
 
in.)
(w/h/d)
Mass
Approx. 1.2 kg (2 lb. 10 oz.)
Supplied accessories
Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without
notice.
ATTENTION AU COMPOSANT AYANT RAPPORT
 À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 
!
 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE  DES PIÈCES
SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES
SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL
OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 3 –
SECTION 1
GENERAL
This section is extracted from
CDX-C6750’s instruction manual.
– 4 –

Download Sony CDX-C6750 / CDX-C7500 Service Manual (Repair Manual)

Here you can view online and download Sony CDX-C6750 / CDX-C7500 Service Manual in PDF. CDX-C6750 / CDX-C7500 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CDX-C6750 / CDX-C7500 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.