Sony MEX-BT2900 / MEX-BT2950 Service Manual ▷ View online
SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
MEX-BT2900/BT2950
SPECIFICATIONS
AUDIO SYSTEM
9-893-038-02
2011D05-1
©
2011.04
US Model
Canadian Model
AEP Model
UK Model
MEX-BT2900
E Model
MEX-BT2950
Ver. 1.1 2011.04
Model Name Using Similar Mechanism
CDX-GT250MP/GT300MP
Mechanism Type
MG-101X-188//Q
Optical Pick-up Name
DAX-25A
Photo: MEX-BT2900
Tuner section (BT2900: US and Canadian models)
FM
Tuning range: 87.5 – 107.9 MHz
Antenna (aerial) terminal:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 μV
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
Wireless Communication
Communication System:
Bluetooth Standard version 2.1 + EDR
Output:
Bluetooth Standard Power Class 2 (Max. +4 dBm)
Maximum communication range:
Line of sight approx. 10 m (33 ft)*
1
Frequency band:
2.4 GHz band (2.4000 – 2.4835 GHz)
Modulation method: FHSS
Compatible Bluetooth Profiles*
Compatible Bluetooth Profiles*
2
:
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio Video Remote Control Profile) 1.3
HFP (Handsfree Profile) 1.5
PBAP (Phone Book Access Profile)
OPP (Object Push Profile)
AVRCP (Audio Video Remote Control Profile) 1.3
HFP (Handsfree Profile) 1.5
PBAP (Phone Book Access Profile)
OPP (Object Push Profile)
FOR UNITED STATES CUSTOMERS. NOT
APPLICABLE IN CANADA, INCLUDING
IN THE PROVINCE OF QUEBEC.
APPLICABLE IN CANADA, INCLUDING
IN THE PROVINCE OF QUEBEC.
POUR LES CONSOMMATEURS AUX
ÉTATS-UNIS. NON APPLICABLE AU
CANADA, Y COMPRIS LA PROVINCE DE
QUÉBEC.
ÉTATS-UNIS. NON APPLICABLE AU
CANADA, Y COMPRIS LA PROVINCE DE
QUÉBEC.
CEA2006 Standard
Power Output: 17 Watts RMS
4 Ohms < 1% THD+N
SN Ratio: 80 dBA
(reference: 1 Watt into 4 Ohms)
Power Output: 17 Watts RMS
4 Ohms < 1% THD+N
SN Ratio: 80 dBA
(reference: 1 Watt into 4 Ohms)
AUDIO POWER SPECIFICATIONS
(BT2900: US and Canadian models only)
4 at
*1 The actual range will vary depending on factors
such as obstacles between devices, magnetic
fields around a microwave oven, static electricity,
reception sensitivity, antenna’s performance,
operating system, software application, etc.
fields around a microwave oven, static electricity,
reception sensitivity, antenna’s performance,
operating system, software application, etc.
*2 Bluetooth standard profiles indicate the purpose of
Bluetooth communication between devices.
Power amplifier section
Output: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W
× 4 (at 4 ohms)
General
Outputs:
Audio outputs terminal (front, rear/sub switchable)
(BT2900: US and Canadian models/BT2950)
Audio outputs terminal (rear/sub switchable)
(BT2900: AEP and UK models)
Power antenna (aerial) relay control terminal
Power amplifier control terminal
(BT2900: US and Canadian models/BT2950)
Audio outputs terminal (rear/sub switchable)
(BT2900: AEP and UK models)
Power antenna (aerial) relay control terminal
Power amplifier control terminal
Inputs:
BUS control input terminal
BUS audio input terminal
(BT2900: US and Canadian models)
(BT2900: US and Canadian models)
Telephone ATT control terminal
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
Telephone ATT control terminal
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 car 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:
Card remote commander: RM-X304
(BT2900: US and Canadian models/BT2950)
Parts for installation and connections (1 set)
(BT2900: US and Canadian models/BT2950)
Parts for installation and connections (1 set)
Design and specifications are subject to change
without notice.
without notice.
Tuner section (BT2900: AEP and UK models)
FM
Tuning range: 87.5 – 108.0 MHz
Antenna (aerial) terminal:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
MW/LW
Tuning range:
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: MW: 26 μV, LW: 45 μV
Sensitivity: MW: 26 μV, LW: 45 μV
Tuner section (BT2950)
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:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
MW
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)
MW tuning step: 9 kHz/10 kHz switchable
Antenna (aerial) terminal:
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 μV
Sensitivity: 26 μV
SW
Tuning range:
SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 kHz)
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 kHz)
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 30 μV
Sensitivity: 30 μV
MEX-BT2900/BT2950
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
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.
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.
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.
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.
• US and Canadian models:
CAUTION
The use of optical instruments with this
product will increase eye hazard.
CAUTION
The use of optical instruments with this
product will increase eye hazard.
The Bluetooth word mark and logos are owned
by the Bluetooth SIG, Inc. and any use of such
marks by Sony Corporation is under license.
Other trademarks and trade names are those of
their respective owners.
by the Bluetooth SIG, Inc. and any use of such
marks by Sony Corporation is under license.
Other trademarks and trade names are those of
their respective owners.
HD Radio
TM
is a proprietary trademark of
iBiquity Digital Corp.
The “SAT Radio Ready”
logo indicates that this
product will control a satellite
radio tuner module (sold
logo indicates that this
product will control a satellite
radio tuner module (sold
separately). Please see your nearest authorized
Sony dealer for details on the satellite radio
tuner module.
“SAT Radio,” “SAT Radio Ready,” the SAT
Radio and SAT Radio Ready logos and all
related marks are trademarks of Sirius XM
Radio Inc. and XM Satellite Radio Inc.
Sony dealer for details on the satellite radio
tuner module.
“SAT Radio,” “SAT Radio Ready,” the SAT
Radio and SAT Radio Ready logos and all
related marks are trademarks of Sirius XM
Radio Inc. and XM Satellite Radio Inc.
Windows Media is either a registered trademark
or trademark of Microsoft Corporation in the
United States and/or other countries.
or trademark of Microsoft Corporation in the
United States and/or other countries.
This product is protected by certain intellectual
property rights of Microsoft Corporation. Use or
distribution of such technology outside of this
product is prohibited without a license from
Microsoft or an authorized Microsoft subsidiary.
property rights of Microsoft Corporation. Use or
distribution of such technology outside of this
product is prohibited without a license from
Microsoft or an authorized Microsoft subsidiary.
MPEG Layer-3 audio coding technology and
patents licensed from Fraunhofer IIS and Thomson.
patents licensed from Fraunhofer IIS and Thomson.
x Except US and Canadian models:
This label is located on the bottom of the
chassis.
chassis.
MEX-BT2900/BT2950
3
1.
SERVICING NOTES
............................................. 3
2. GENERAL
..................................................................
7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 13
3-2. Cover ............................................................................... 13
3-3. CD Mechanism Deck (MG-101X-188//Q) ..................... 14
3-4.
3-2. Cover ............................................................................... 13
3-3. CD Mechanism Deck (MG-101X-188//Q) ..................... 14
3-4.
ANTENNA Board ........................................................... 14
3-5. MAIN Board (with BT Board) ....................................... 15
3-6. SERVO Board ................................................................. 15
3-7. Chassis (T) Sub Assy ...................................................... 16
3-8. Roller Arm Assy .............................................................. 16
3-9.
3-6. SERVO Board ................................................................. 15
3-7. Chassis (T) Sub Assy ...................................................... 16
3-8. Roller Arm Assy .............................................................. 16
3-9.
Chassis (OP) Assy ........................................................... 17
3-10. Chucking Arm Sub Assy ................................................. 17
3-11. Sled Motor Assy .............................................................. 18
3-12. Optical Pick-up Section .................................................. 19
3-13. Optical Pick-up ............................................................... 19
3-11. Sled Motor Assy .............................................................. 18
3-12. Optical Pick-up Section .................................................. 19
3-13. Optical Pick-up ............................................................... 19
4.
TEST MODE
............................................................ 20
5. DIAGRAMS
5-1. Printed Wiring Boards - MAIN Section - ....................... 22
5-2. Schematic Diagram - MAIN Section (1/3) - ................... 23
5-3. Schematic Diagram - MAIN Section (2/3) - ................... 24
5-4. Schematic Diagram - MAIN Section (3/3) - ................... 25
5-5. Printed Wiring Board - KEY Board -.............................. 26
5-6. Schematic Diagram - KEY Board - ................................ 27
5-2. Schematic Diagram - MAIN Section (1/3) - ................... 23
5-3. Schematic Diagram - MAIN Section (2/3) - ................... 24
5-4. Schematic Diagram - MAIN Section (3/3) - ................... 25
5-5. Printed Wiring Board - KEY Board -.............................. 26
5-6. Schematic Diagram - KEY Board - ................................ 27
6.
EXPLODED VIEWS
6-1. Main Section ................................................................... 32
6-2. Front Panel Section ......................................................... 33
6-3. CD Mechanism Section (MG-101X-188//Q) ................. 34
6-2. Front Panel Section ......................................................... 33
6-3. CD Mechanism Section (MG-101X-188//Q) ................. 34
7.
ELECTRICAL PARTS LIST
.............................. 35
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
MEX-BT2900/BT2950
4
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.
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.
EXTENSION CABLE AND SERVICE POSITION
When repairing or servicing this set, connect the jig (extension
cable) as shown below.
When repairing or servicing this set, connect the jig (extension
cable) as shown below.
• Connect the MAIN board (CN701) and the SERVO board
(CN401) with the extension cable (Part No. J-2502-076-1).
SERVO boadd
(CN401)
(CN401)
MAIN board
(CN701)
(CN701)
extension cable
(Part No. J-2502-076-1)
(Part No. J-2502-076-1)
NOTE FOR REPLACEMENT OF THE BT BOARD
When repairing, the complete BT board should be replaced since
any parts in the BT board cannot be repaired.
When repairing, the complete BT board should be replaced since
any parts in the BT board cannot be repaired.
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 SWITCH BOARD
When SWITCH board is defective, exchange the MECHANICAL
BLOCK ASSY (X).
When SWITCH board is defective, exchange the MECHANICAL
BLOCK ASSY (X).