Sony CDX-M20 Service Manual ▷ View online
SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
CDX-M20
SPECIFICATIONS
9-893-373-01
2011L33-1
©
2011.12
US Model
Canadian Model
Ver. 1.0 2011.12
Model Name Using Similar Mechanism
CDX-GT360MP
Mechanism Type
MG-101X-188
Optical Pick-up Name
DAX-25A
FM/AM COMPACT DISC PLAYER
• The Tuner and CD sections have no adjustments.
Tuner section
FM
Tuning range:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 108.0 MHz (at 100 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
87.5 – 108.0 MHz (at 100 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
FM tuning step:
50 kHz/100 kHz/200 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Usable sensitivity: 8 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 80 dB (stereo)
Separation: 50 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
Usable sensitivity: 8 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 80 dB (stereo)
Separation: 50 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range:
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
530 – 1,710 kHz (at 10 kHz step)
AM tuning step: 9 kHz/10 kHz switchable
Antenna (aerial) terminal:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency:
9,124.5 kHz or 9,115.5 kHz/4.5 kHz
(at 9 kHz step)
9,115 kHz or 9,125 kHz/5 kHz
(at 10 kHz step)
(at 9 kHz step)
9,115 kHz or 9,125 kHz/5 kHz
(at 10 kHz step)
Sensitivity: 26 μV
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Power amplifier section
Output: Speaker outputs
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
General
Outputs:
Audio outputs terminal (rear/sub switchable)
Power antenna (aerial)/Power amplifier control
terminal (REM OUT)
Power antenna (aerial)/Power amplifier control
terminal (REM OUT)
Inputs:
SiriusXM input terminal
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
Tone controls:
Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
Power requirements: 12 V DC boat battery
(negative ground (earth))
Dimensions: Approx. 178 × 50 × 179 mm
(7
1
/
8
× 2 × 7
1
/
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 11 oz)
Supplied accessories*:
Supplied accessories*:
Remote commander: RM-X201
Parts for installation and connections (1 set)
Parts for installation and connections (1 set)
Design and specifications are subject to change
without notice.
without notice.
CEA2006 Standard
Power Output: 17 Watts RMS 4 at
4 Ohms < 1% THD+N
SN Ratio: 80 dBA
(reference: 1 Watt into 4 Ohms)
Power Output: 17 Watts RMS 4 at
4 Ohms < 1% THD+N
SN Ratio: 80 dBA
(reference: 1 Watt into 4 Ohms)
AUDIO POWER SPECIFICATIONS
CDX-M20
2
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.
aged by heat.
FLEXIBLE CIRCUIT BOARD REPAIRING
•
•
Keep the temperature of soldering iron around 270 °C during
repairing.
repairing.
•
Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
circuit board (within 3 times).
•
Be careful not to apply force on the conductor when soldering
or unsoldering.
or unsoldering.
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
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.
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous radia-
tion exposure.
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous radia-
tion exposure.
SiriusXM subscriptions and Connect
Tuner are sold separately.
www.siriusxm.com.
Sirius, XM and all related marks and logos
are trademarks of Sirius XM Radio Inc.
and its subsidiaries. All other marks and
logos are the property of their respective
owners. All rights reserved.
Tuner are sold separately.
www.siriusxm.com.
Sirius, XM and all related marks and logos
are trademarks of Sirius XM Radio Inc.
and its subsidiaries. All other marks and
logos are the property of their respective
owners. All rights reserved.
Windows Media is either a registered
trademark or trademark of Microsoft
Corporation in the United States and/or
other countries.
trademark or trademark of Microsoft
Corporation in the United States and/or
other countries.
This product contains technology subject
to certain intellectual property rights of
Microsoft. Use or distribution of this
technology outside of this product is
prohibited without the appropriate
license(s) from Microsoft.
to certain intellectual property rights of
Microsoft. Use or distribution of this
technology outside of this product is
prohibited without the appropriate
license(s) from Microsoft.
MPEG Layer-3 audio coding technology
and patents licensed from Fraunhofer IIS
and Thomson.
and patents licensed from Fraunhofer IIS
and Thomson.
CAUTION
The use of optical instruments with this
product will increase eye hazard.
The use of optical instruments with this
product will increase eye hazard.
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 FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
CDX-M20
3
1.
SERVICING NOTES
............................................. 3
2. GENERAL
.................................................................. 5
3. DISASSEMBLY
3-1. Disassembly
Flow
........................................................... 7
3-2. Cover ............................................................................... 7
3-3. Sub Panel Complete Assy ............................................... 8
3-4. CD Mechanism Deck (MG-101X-188) .......................... 8
3-5. MAIN
3-3. Sub Panel Complete Assy ............................................... 8
3-4. CD Mechanism Deck (MG-101X-188) .......................... 8
3-5. MAIN
Board
................................................................... 9
3-6. SERVO
Board
................................................................. 9
3-7. Chassis (T) Sub Assy ...................................................... 10
3-8. Roller
3-8. Roller
Arm
Assy
.............................................................. 10
3-9. Chassis
(OP)
Assy
........................................................... 11
3-10. Chucking Arm Sub Assy ................................................. 11
3-11. Sled Motor Assy
3-11. Sled Motor Assy
.............................................................. 12
3-12. Optical Pick-up Section .................................................. 13
3-13. Optical Pick-up ............................................................... 13
3-13. Optical Pick-up ............................................................... 13
4. DIAGRAMS
4-1. Printed Wiring Boards - MAIN Section - ....................... 16
4-2. Schematic Diagram - MAIN Section (1/3) - ................... 17
4-3. Schematic Diagram - MAIN Section (2/3) - ................... 18
4-4. Schematic Diagram - MAIN Section (3/3) - ................... 19
4-5. Printed Wiring Board - KEY Board -.............................. 20
4-6. Schematic Diagram - KEY Board - ................................ 21
4-2. Schematic Diagram - MAIN Section (1/3) - ................... 17
4-3. Schematic Diagram - MAIN Section (2/3) - ................... 18
4-4. Schematic Diagram - MAIN Section (3/3) - ................... 19
4-5. Printed Wiring Board - KEY Board -.............................. 20
4-6. Schematic Diagram - KEY Board - ................................ 21
5.
EXPLODED VIEWS
5-1. Main
Section
................................................................... 24
5-2. Front Panel Section ......................................................... 25
5-3. CD Mechanism Section (MG-101X-188) ....................... 26
5-3. CD Mechanism Section (MG-101X-188) ....................... 26
6.
ELECTRICAL PARTS LIST
.............................. 27
Accessories are given in the last of the electrical parts list.
TABLE OF CONTENTS
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The fl exible board is easily damaged and should be handled with
care.
static break-down because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The fl exible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fi xed resistor located at the side of optical
pick-up block.
optical pick-up block.
Never turn the semi-fi xed resistor located at the side of optical
pick-up block.
optical pick-up
semi-fixed resistor
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
CDX-M20
4
NOTE FOR REPLACEMENT OF THE AUX JACK (J901)
To replace the AUX jack requires alignment.
1. Insert the AUX jack into the front panel.
2. Place the KEY board on the front panel and align the terminals
To replace the AUX jack requires alignment.
1. Insert the AUX jack into the front panel.
2. Place the KEY board on the front panel and align the terminals
of the AUX jack with the holes in the KEY board.
3. Solder three terminals of the jack.
TEST DISCS
Use following TEST DISC when this set confi rms the operation
and checks it.
Use following TEST DISC when this set confi rms the operation
and checks it.
Part No.
Description
3-702-101-01
YEDS-18 (for CD)
4-225-203-01
PATD-012 (for CD)
NOTE FOR THE 15-PIN CONNECTOR (CN901)
Do not use alcohol to clean the 15-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
Do not use alcohol to clean the 15-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
NOTE FOR REPLACEMENT OF THE SERVO BOARD
When repairing, the complete SERVO board should be replaced
since any parts in the SERVO board cannot be repaired.
When repairing, the complete SERVO board should be replaced
since any parts in the SERVO board cannot be repaired.
NOTE FOR REPLACEMENT OF THE SENSOR BOARD
When SENSOR board is defective, exchange the MECHANICAL
BLOCK ASSY (X).
When SENSOR board is defective, exchange the MECHANICAL
BLOCK ASSY (X).
EXTENSION CABLE AND SERVICE POSITION
When repairing or servicing this unit, connect the jig cable (exten-
sion cable (CD mecha)) as shown below.
When repairing or servicing this unit, connect the jig cable (exten-
sion cable (CD mecha)) as shown below.
• Connect the MAIN board (CN701) and the SERVO board
(CN401) with the jig cable.
Jig cable:
Part No.
Part No.
Description
A-1818-424-A
EXTENSION CABLE (CD MECHA)
SERVO board
(CN401)
(CN401)
MAIN board
(CN701)
(CN701)
extention cable (CD mecha)
KEY board
front panel
AUX jack