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Ver 1.3 2001. 09
Model Name Using Similar Mechanism
CDX-C5000R
CD Drive Mechanism Type
MG-383Z-121//Q
Optical Pick-up Name
KSS-720A
SERVICE MANUAL
US Model
Canadian Model
CDX-CA850X/CA860X
AEP Model
UK Model
CDX-CA850
CDX-CA850/CA850X/CA860X
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, Canadian 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, Canadian model)
87.5 ­ 108.0 MHz (AEP, UK 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, Canadian model)
Tuning range
530 ­ 1,710 kHz (US, Canadian model)
Antenna terminal
External Antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
30 µV
MW/LW (AEP, UK 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
SPECIFICATIONS
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
Power amplifier control lead
Inputs
Telephone ATT control lead
Illumination control lead
Bus control input connector
Bus audio input connector
Remote controller input connector
Antenna input connector
Tone controls
Bass ±10 dB at 62 Hz (US, Canadian model)
Bass ±8 dB at 100 Hz (AEP, UK model)
Treble ±10 dB at 16 kHz (US, Canadian model)
Treble ±8 dB at 10 kHz (AEP, UK model)
Loudness
+8 dB at 100 Hz
+2 dB at 10 kHz
Power requirements
12 V DC car battery
(negative ground)
Photo: CDX-CA850X
· The tuner and CD sections have no adjustments.
Sony Corporation
e Vehicle Company
Shinagawa Tec Service Manual Production Group
9-870-291-14
2001I0400-1
© 2001. 9
­ Continued on next page ­
FM/MW/LW COMPACT DISC PLAYER
CDX-CA850
FM/AM COMPACT DISC PLAYER
CDX-CA850X/CA860X


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CDX-CA850/CA850X/CA860X
SERVICE NOTES
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
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.
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 × 177 mm
(7 1/8
× 2 × 7 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. 1.3 kg
(2 lb. 10 oz.)
Supplied accessories
Parts for installation and connections (1 set)
Front panel case (1)
Rotary commander
RM-X5S
Card remote commander
RM-X112 (CDX-CA850X/CA860X)
RM-X113 (CDX-CA850)
Note
This unit cannot be connected to a digital preamplifier or an equalizer.
Design and specifications are subject to change without
notice.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 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.
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.
· 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.U) 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.U).
optical pick-up block
semi-fixed resistor
· US, Canadian model


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TABLE OF CONTENTS
1. GENERAL ........................................................................... 4
2. DISASSEMBLY
2-1. Sub Panel Assy .................................................................. 10
2-2. CD Mechanism Block ....................................................... 10
2-3. Main Board ....................................................................... 10
2-4. Heat Sink ........................................................................... 11
2-5. Chassis (T) Assy ................................................................ 11
2-6. Lever Section ..................................................................... 12
2-7. Servo Board ....................................................................... 12
2-8. Arm Roller Assy ................................................................ 13
2-9. Chassis (OP) Assy ............................................................. 13
2-10. Optical Pick-up Block ....................................................... 14
3. DIAGRAMS
3-1. IC Pin Descriptions ........................................................... 15
3-2. Block Diagram ­CD Section­ ........................................... 23
3-3. Block Diagram ­Tuner Section­ ....................................... 24
3-4. Block Diagram ­Display Section­ .................................... 25
3-5. Circuit Boards Location .................................................... 26
3-6. Printed Wiring Boards ­CD Mechanism Section­ ............ 28
3-7. Schematic Diagram ­CD Mechanism Section (1/2)­ ....... 30
3-8. Schematic Diagram ­CD Mechanism Section (2/2)­ ....... 31
3-9. Printed Wiring Boards ­Main Section­ ............................ 32
3-10. Schematic Diagram ­Main Section (1/4)­ ........................ 34
3-11. Schematic Diagram ­Main Section (2/4)­ ........................ 35
3-12. Schematic Diagram ­Main Section (3/4)­ ........................ 36
3-13. Schematic Diagram ­Main Section (4/4)­ ........................ 37
3-14. Printed Wiring Board ­Sub (CD) Section­ ....................... 38
3-15. Schematic Diagram ­Sub (CD) Section­ .......................... 39
3-16. Printed Wiring Board ­Key Section­ ................................ 40
3-17. Schematic Diagram ­Key Section­ ................................... 41
4. EXPLODED VIEWS
4-1. Chassis Section ................................................................. 46
4-2. Front panel Section ........................................................... 47
4-3. CD Mechanism Section (1) ............................................... 48
4-4. CD Mechanism Section (2) ............................................... 49
4-5. CD Mechanism Section (3) ............................................... 50
5. ELECTRICAL PARTS LIST ........................................ 51
CDX-CA850/CA850X/CA860X
Ver 1.1 2001. 04


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CDX-CA850/CA850X/CA860X
SECTION 1
GENERAL
This section is extracted from AEP,
UK model's instruction manual.


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CDX-CA850/CA850X/CA860X