Sony CDX-GT250M User manual

1
Ver. 1.0 2006. 01
SERVICE MANUAL
E Model
CDX-GT250M
SPECIFICATIONS
• The tuner and CD sections have no adjustments.
Sony Corporation
eVehicle Division
Published by Sony Techno Create Corporation
9-887-070-01
2006A04-1
© 2006. 01
FM/AM COMPACT DISC PLAYER
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Tuner section
FM
Tuning range: 87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
FM tuning interval: 50 kHz/200 kHz switchable
Antenna terminal: External antenna connector
Intermediate frequency: 10.7 MHz/450 kHz
Usable sensitivity: 9 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 67 dB (stereo), 69 dB (mono)
Harmonic distortion at 1 kHz:
0.5 % (stereo), 0.3 % (mono)
Separation: 35 dB at 1 kHz
Frequency response: 30 – 15,000 Hz
AM
Tuning range: 531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
AM tuning interval: 9 kHz/10 kHz switchable
Antenna terminal: External antenna connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 µV
Power amplifier section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W ×4 (at 4 ohms)
– Continued on next page –
Model Name Using Similar Mechanism CDX-GT250S
CD Drive Mechanism Type MG-611WA-186//Q
Optical Pick-up Name KSS1000E
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2
CDX-GT250M
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.
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.
SERVICE NOTES
This label is located on the bottom of the chassis.
TEST DISCS
This set can playback CD-R and CD-ROM discs. The following
test discs should be used to check the capability:
CD-R test disc TCD-R082LMT (Part No. J-2502-063-1)
CD-RW test disc TCD-W082L (Part No. J-2502-063-2)
CAUTION
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.
This compact disc player is classified as a CLASS 1 LASER
product. The CLASS 1 LASER PRODUCT label is located on the
exterior.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
optical pick-up
semi-fixed resistor
General
Outputs: Audio outputs terminal (sub/rear switchable)
Power antenna relay control terminal
Power amplifier control terminal
Inputs: Telephone ATT control terminal
Remote controller input terminal
Antenna 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)
Power requirements: 12 V DC car battery (negative ground)
Dimensions: Approx. 178 ×50 ×179 mm (w/h/d)
Mounting dimensions: Approx. 182 ×53 ×161 mm (w/h/d)
Mass: Approx. 1.2 kg
Supplied accessories: Parts for installation and connections (1 set)
Card remote commander: RM-X151
Design and specifications are subject to change
without notice.
US and foreign patents licensed from Dolby
Laboratories.
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3
CDX-GT250M
zUNLEADED 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
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 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.
Soldering irons using a temperature regulator should be set to
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 flow)
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.
EXTENSION CABLE AND SERVICE POSITION
Whenrepairing orservicingthisset, connectthejig (extensioncable)
as shown below.
•Connect the MAIN board (CNP301) and the SERVO board (CN2)
with the extension cable (Part No. J-2502-076-1).
•CD playback
You can play CD-DA (also containing CD TEXT*), CD-R/CD-
RW (MP3/WMA files also containing Multi Session andATRAC
CD (ATRAC3 andATRAC3plus format).
Type of discs Label on the disc
CD-DA
MP3
WMA
ATRAC CD
*ACD TEXT disc is a CD-DA that includes information such as
disc, artist and track name.
SERVO BOAR
D
CN2
MAIN BOARD
CNP301 J-2502-076-1
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4
CDX-GT250M
TABLE OF CONTENTS
1. GENERAL
Location of controls and basic operations ............................... 5
Connections ............................................................................. 6
2. DISASSEMBLY
2-1. Sub Panel Assy.................................................................... 8
2-2. CD Mechanism Block ......................................................... 8
2-3. Main Board ......................................................................... 9
2-4. Chassis (T) Sub Assy .......................................................... 9
2-5. Roller Arm Assy ................................................................ 10
2-6. Chassis (OP) Assy ............................................................. 10
2-7. Optical Pick-up ................................................................. 11
2-8. SL Motor Assy (M902) ..................................................... 11
2-9. LE Motor Assy (M903)..................................................... 12
2-10. Servo Board....................................................................... 12
3. DIAGRAMS
3-1. Block Diagram – CD Section –......................................... 13
3-2. Block Diagram – Main Section –...................................... 14
3-3. Block Diagram – Display Section –.................................. 15
3-4. Circuit Boards Location .................................................... 16
3-5. Printed Wiring Boards – CD Mechanism Section – ......... 17
3-6. Schematic Diagram – CD Mechanism Section (1/2) – .....18
3-7. Schematic Diagram – CD Mechanism Section (2/2) – .....19
3-8. Printed Wiring Board – Main Section – ............................20
3-9. Schematic Diagram – Main Section (1/3) –...................... 21
3-10. Schematic Diagram – Main Section (2/3) – ...................... 22
3-11. Schematic Diagram – Main Section (3/3) – ...................... 23
3-12. Printed Wiring Board – Key Section –.............................. 24
3-13. Schematic Diagram – Key Section – ................................ 25
4. EXPLODED VIEWS
4-1. Main Section ..................................................................... 32
4-2. Front Panel Section ........................................................... 33
4-3. CD Mechanism Section (1) (MG-611WA-186//Q)........... 34
4-4. CD Mechanism Section (2) (MG-611WA-186//Q)........... 35
4-5. CD Mechanism Section (3) (MG-611WA-186//Q)........... 36
4-6. CD Mechanism Section (4) (MG-611WA-186//Q)........... 37
5. ELECTRICAL PARTS LIST ........................................ 38
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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5
CDX-GT250M
SECTION 1
GENERAL This section is extracted
from instruction manual.
6
Location of controls and basic operations
Main unit
Card remote commander
RM-X151 Refer to the pages listed for details. The
corresponding buttons on the card remote
commander control the same functions as those
on the unit.
AOFF button
To power off; stop the source.
BVolume control dial/select button 9
To adjust volume (rotate); select setup items
(press and rotate).
CEQ3 (equalizer) button 9
To select an equalizer type (XPLOD,
VOCAL, CLUB, JAZZ, NEW AGE, ROCK,
CUSTOM or OFF).
DDisc slot
To insert the disc (label side up), playback
starts.
EDisplay window
FZ (eject) button
To eject the disc.
GSCRL (scroll) button 8
To scroll the display item.
HDSPL (display)/DIM (dimmer) button
4, 8
To change display items (press); change the
display brightness (press and hold).
IGP*
1
/ALBM*
2
–/+ buttons
To skip groups/albums (press); skip groups/
albums continuously (press and hold).
J(front panel release) button 4
OFF
DSPL SCRL
SEL SOURCE MODE
132
465
ATT
VOL
+
–
+
–
7
KSEEK –/+ buttons
CD:
To skip tracks (press); skip tracks
continuously (press, then press again within
about 1 second and hold); reverse/fast-
forward a track (press and hold).
Radio:
To tune in stations automatically (press); find
a station manually (press and hold).
LSOURCE button
To power on; change the source (Radio/CD/
AUX).
MBTM button 8
To start the BTM function (press and hold).
NMODE button 8
To select the radio band (FM/AM).
ORESET button (located behind the front
panel) 4
PFrequency select switch (located on
the bottom of the unit)
See “Frequency select switch” in the
supplied installation/connections manual.
QNumber buttons
CD:
(3): REP 8
(4): SHUF 8
(6): PAUSE
To pause playback. To cancel, press
again.
Radio:
To receive stored stations (press); store
stations (press and hold).
RSENS button
To improve weak reception: LOCAL/
MONO.
SReceptor for the card remote
commander
TAUX input jack 10
To connect a portable audio device.
The following buttons on the card remote
commander have also different buttons/functions
from the unit.
wa <(.)/,(>) buttons
To control CD/Radio, the same as (SEEK)
–/+ on the unit.
ws VOL (volume) +/– button
To adjust volume.
wd ATT (attenuate) button
To attenuate the sound. To cancel, press
again.
wf SEL (select) button
To select items.
wg M(+)/m(–) buttons
To control CD, the same as (GP/ALBM) –/+
on the unit.
wh Number buttons
To receive stored stations (press); store
sations (press and hold).
*1 When an ATRAC CD is played.
*2 When an MP3/WMA is played.
Note
If the unit is turned off and the display disappears, it
cannot be operated with the card remote commander
unless
(SOURCE) on the unit is pressed, or a disc is
inserted to activate the unit first.
Tip
For details on how to replace the battery, see
“Replacing the lithium battery of the card remote
commander” on page 12.
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6
CDX-GT250M
• CONNECTIONS
BUS
AUDIO
IN
L
R
Diagrama de conexión
1A una superficie metálica del automóvil
Conecte primero el cable de conexión a masa negro,
y después los cables amarillo y rojo de entrada de
alimentación.
2Al cable de control de la antena motorizada
o al cable de fuente de alimentación del
amplificador de señal de la antena
Notas
• Si no se dispone de antena motorizada ni de amplificador
de antena, o se utiliza una antena telescópica accionada
manualmente, no será necesario conectar este cable.
• Si el automóvil incorpora una antena de FM/AM en el
cristal trasero o lateral, consulte “Notas sobre los cables
de control y de fuente de alimentación”.
3A AMP REMOTE IN de un amplificador de
potencia opcional
Esta conexión es sólo para amplificadores.La conexión de
cualquier otro sistema puede dañar la unidad.
4Al terminal de alimentación de + 12 V que
recibe energía en la posición de accesorio
del interruptor de la llave de encendido
Notas
• Si no hay posición de accesorio, conéctelo al terminal de
alimentación (batería) de + 12 V que recibe energía sin
interrupción.
Asegúrese de conectar primero el cable de conexión a
masa negro a una superficie metálica del automóvil.
• Si el automóvil incorpora una antena de FM/AM en el
cristal trasero o lateral, consulte “Notas sobre los cables
de control y de fuente de alimentación”.
5Al terminal de alimentación de + 12 V que
recibe energía sin interrupción
Asegúrese de conectar primero el cable de conexión a masa
negro a una superficie metálica del automóvil.
Notas sobre los cables de control y de fuente de
alimentación
• El cable de control de la antena motorizada (azul) suministrará
cc de + 12 V cuando conecte la alimentación del sintonizador.
• Si el automóvil dispone de una antena de FM/AM incorporada
en el cristal trasero o lateral, conecte el cable de control de
antena motorizada (azul) o el cable de entrada de alimentación
auxiliar (rojo) al terminal de alimentación del amplificador de
antena existente.Para obtener más información, consulte a su
distribuidor.
• Con esta unidad no es posible utilizar una antena motorizada
sin caja de relé.
Conexión para protección de la memoria
Si conecta el cable de entrada de alimentación amarillo, el
circuito de la memoria recibirá siempre alimentación, aunque
apague el interruptor de encendido.
Notas sobre la conexión de los altavoces
• Antes de conectar los altavoces, desconecte la alimentación
de la unidad.
• Utilice altavoces con una impedancia de 4 a 8  con la
capacidad de potencia adecuada para evitar que se dañen.
• No conecte los terminales de altavoz al chasis del automóvil,
ni conecte los terminales del altavoz derecho con los del
izquierdo.
• No conecte el cable de conexión a masa de esta unidad al
terminal negativo (–) del altavoz.
• No intente conectar los altavoces en paralelo.
• Conecte solamente altavoces pasivos. Si conecta altavoces
activos (con amplificadores incorporados) a los terminales de
altavoz, puede dañar la unidad.
• Para evitar fallos de funcionamiento, no utilice los cables de
altavoz incorporados instalados en el automóvil si su unidad
comparte un cable negativo común (–) para los altavoces
derecho e izquierdo.
• No conecte los cables de altavoz de la unidad entre sí.
Nota sobre la conexión
Si el altavoz y el amplificador no están conectados
correctamente, aparecerá “FAILURE” en la pantalla. Si es así,
compruebe la conexión de ambos dispositivos.
*
1
RCA pin cord (not supplied)
*
2
AUDIO OUT can be switched to SUB
or REAR.
For details, see the supplied
Operating Instructions.
*
1
Cable con terminales RCA
(no suministrado)
*
2
AUDIO OUT (Salida de audio) puede
cambiarse a SUB (Secundaria) o REAR
(Posterior).Para obtener información,
consulte el manual de instrucciones
suministrado.
*
1
*
2
AMP REM
Max. supply current 0.3 A
Corriente máx. de alimentación de 0,3 A
Fuse (10 A)
Fusible (10 A)
Blue/white striped
Con rayas azules y blancas
from car aerial
desde la antena del automóvil
Red
Rojo
Yellow
Amarillo
White
Blanco
Green
Verde
Purple
Morado
White/black striped
Con rayas blancas y negras
Grey/black striped
Con rayas grises y negras
Green/black striped
Con rayas verdes y negras
Grey
Gris
Left
Izquierdo
Right
Derecho
Left
Izquierdo
Right
Derecho
ANT REM
Black
Negro
Blue
Azul
Max. supply current 0.1 A
Corriente máx. de alimentación de 0,1 A
Purple/black striped
Con rayas Moradas y negras
*
1
2
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7
CDX-GT250M
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
2-1. SUB PANEL ASSY
(Page 8)
2-2. CD MECHANISM BLOCK
(Page 8)
SET
2-3. MAIN BOARD
(Page 9) 2-4. CHASSIS (T) SUB ASSY
(Page 9)
2-5. ROLLER ARM ASSY
(Page 10)
2-6. CHASSIS (OP) ASSY
(Page 10)
2-8. SL MOTOR ASSY (M902)
(Page 11)
2-10. SERVO BOARD
(Page 12)
2-7. OPTICAL PICK-UP
(Page 11) 2-9. LE MOTOR ASSY (M903)
(Page 12)
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8
CDX-GT250M
2-2. CD MECHANISM BLOCK
Note : Follow the disassembly procedure in the numerical order given.
2-1. SUB PANEL ASSY
2 two claw
s
3 two claws
4 sub panel assy
1 two screws
(+PTT 2.6
× 6)
6 bracket (CD)
7 CD mechanism block
4 CNP301
3
1 screw
(+PTT 2.6 × 6
)
2 screw
(+PTT 2.6 × 6)
5 two screws
(+PTT 2.6 × 4)
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9
CDX-GT250M
2-4. CHASSIS (T) SUB ASSY
2-3. MAIN BOARD
3 MAIN board
2 two screws
(+PTT 2.6
× 8)
1 three screws
(+BTT 2.6
× 5)
5 SENSOR board
6 chassis (T) sub assy
4 claw
3 claw
1 two screws
(+P 1.7
× 2.2)
2 two screws
(+P 1.7
× 2.2)
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10
CDX-GT250M
2-5. ROLLER ARM ASSY
2-6. CHASSIS (OP) ASSY
3 washer
4 gear (RA1)
5 roller arm assy
1 spring (RAL-B)
2 spring (RAR-B)
4 washer
0 coil spring (damper)
9 two coil springs (damper)
qa chassis (OP) assy
5 gear (LE1)
lever (D)
slider (R)
6
7
8
3 tension spring (KF60)
1 optical pick-up (16 core
)
(CN1)
2 Remove the six solderings.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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11
CDX-GT250M
2-7. OPTICAL PICK-UP
2-8. SL MOTOR ASSY (M902)
1 tension coil spring (CHKG
)
2 chucking arm sub assy
4 rack (SL)
5 claw
6 main shaft
7 optical pick-up
3 screw
(+B 1.4 × 5)
1 screw
(+P 1.4 × 1.8
)
2 SL motor assy (M902)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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12
CDX-GT250M
2-9. LE MOTOR ASSY (M903)
2-10. SERVO BOARD
2 washer
4
qd
3
gear (LE1)
7 leaf spring (LE)
5
lever (D)
bracket (LEM-N)
slider (R)
6 screw
(+P 1.7
× 2.2)
8 screw
(+M 1.7
× 2.5)
qa screw
(+M 1.7
× 2.5)
qf two toothed lock screws
(+M 1.4
)
qs screw
(+M 1.7
× 2.5)
9 bearing (LEB-N)
0 gear (LE) assy
qg LE motor assy
(M903)
1 Remove the two solderings.
5 claw
6 SERVO board
4 screw
1 Remove the eight solderings.
2 Remove the three solderings.
3 optical pick-up (16 core)
(CN1)
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13 13
CDX-GT250M
CDX-GT250M
3-1. BLOCK DIAGRAM — CD SECTION —
SECTION 3
DIAGRAMS
89
RFO
RF AMP,DIGITAL SERVO,
DIGITAL SIGNAL PROCESSOR
IC2
83
RFEQO
3
RFRP
6
TEI
81 RFI
82 RFRPI
2RFZI
7TEZI
9F0O
PD1
PD2
E
F
I-V AMP
PD LD
DETECTOR
88 AGCI
94
96
95
97
100
98
TNI
FPI1
FNI1
FPI2
FNI2
TPI
91 LDO 92
MDI
(FOCUS)
(TRACKING)
2-AXIS DEVICE
OPTICAL
PICK-UP BLOCK
(KSS1000E)
• Signal Path
: CD PLAY
LASER DIODE
M
M
M
18
17
VO3–
VO3+
14
13
VO1+
VO1–
12
11 VO2–
VO2+
10
9
VOL+
VOL–
FWD
REV
1
28
OPIN4– 26
OPOUT4 25
10 TRO
OPIN3– 23
OPOUT3 22
12 FMO
OPOUT1 4
13 DMO
OPOUT2 7
MUTE 21
16
15
VO4–
VO4+
M903
(LOADING)
M901
(SPINDLE)
M902
(SLED)
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING
MOTOR DRIVE
IC1
51
PIO3
48
PIO0
36
MSTBY
58
ZDET
37
/RST
43
/CCE
42
BUCK
41
BUS3
CD-L MAIN
SECTION
A
30
LO
27
RO R-CH
27 DEC SSTBY
15 CD ZDET
14 CD XRST
13 CD XCCE
53 MEC_SELFSW
45 MEC_INSW
42 MEC_LIMIT
12 CD BUCK
11 CD BUS3
40
BUS2 10 CD BUS2
39
BUS1 8CD BUS1
38
BUS0 7CD BUS0
81 X1
80 X0
MEC LOAD
43
DRVON
6
MEC EJECT
44
CD
SYSTEM CONTROL
IC3
+1.5V REG
IC6
SYSTEM CONTROL
IC501 (1/3)
37 DEC XMUTE
30 DEC INT
SW2
(SELF)
46 MEC_DSW
SW1
(DOWN)
SW3
(DISC IN)
SW4
(LIMIT)
56
UNISI
25
RXD
57
UNISO
58
UNICKI
50
BUS ON
51
BU IN
75
RSTX
61
EJECT OK
67
MECON CHK
1
CDON
1500MV
63
MECON
64
CDON
66
ZMUTE
60
A ATT
26
TXD
PD1
E
F
LD
MON OUT
FCS+
FCS–
TRK+
TRK–
PD2
AUTOMATIC
POWER
CONTROL
Q21
+1.5V ON/OFF
SWITCH
Q2,3
• R-ch is omitted due to same as L-ch.
24
23
X2
16.9344MHz
X1
12MHz
XI
XO
DISPLAY
SECTION
C
MAIN
SECTION
B
EJECT OK SW
UNI SI
UNI SO
ATT
UNI CLK
BUS ON
B/U CHECK
SYS RST
89
CD ON
VOUT
98
CDM ON
99
Z MUTE
MECHA+6V
93
68
CDON CHK
15 VDD
3
CE
D+3.3V
+1.5V
+1.5V
BU+3.3V
(Page 14)
(Page 14)
(Page 15)
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6 3
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0 9 9
2
8 9
4 2
9 8
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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1414
CDX-GT250M
CDX-GT250M
3-2. BLOCK DIAGRAM — MAIN SECTION —
(Page 13)
(Page 13)
1ANT 7TU LCH
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
IC2-BUS
CONTROLLED
POWER AMP/
MULTIPLE
VOLTAGE
REGULATOR
IC750
SYSTEM CONTROL
IC501 (2/3)
CN601
6TU RCH
R-CH (FRONT)
R-CH (REAR)
BATT
9CD LCH
8CD RCH
5AUX LCH
3AUX RCH
R-CH
4
3
10
VCC
11
TU VDD
15
E2P VDD
13
TU-SCL
14
TU-SDA
6
S-METER
7
TU MUTE
16
E2P SCL
17
E2P SDA
39 VSM
AUDIO+8.3V
TU+5V
BU+3.3V
12 TU ATT
25 EEP CKO
24 EEP SIO
8
MUTE CONDITION
5
QUALITY
53 TU ATT IN
38 QUALITY
L-CH
R-CH
CD-L
J901
AUX
BUFFER
IC901
AUX
R-CH
R-CH
17
18
OUT SUB-L
OUT SUB-R R-CH
L
R
5
3
OUT FL+
OUT FL–
9
7
OUT RL+
OUT RL–
29
27
AMP-REM
R-CH
ANT-REM
BATT
30
37
AUDIO8.3V
B.UP+B
31
33
SERVO3.3V
MECHA6V
34
PANEL+B
TU+5V
25
24
OUT FR
OUT RR
29
MUTE
2SDA
AUDIO+8.3V
BU+3.3V
6
VP2
20
VP1
35
VP
SERVO+3.3V
MECHA+6V
PANEL+B
4SCL
SDA
SCL
16 BEEP
22 STB
25 DIAG
AUDIO+8.3V
15
7
10
12
11
16
1
9
2
4
3
5
6
30
31
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
33
I2C CKO
34
I2C SIO
9
VOL ATT
86
ATT
5
BEEP
26
AMP STB
8
DIAG
54
BU IN
73
UNISI
58
UNISO
59
UNISCK
60
BUS ON
87
UNI SI
UNI SO
UNI CLK
BUS ON
B/U CHECK
ATT
TEST IN
12 IN FL FL+
FL–
RL+
RL–
FR+
FR–
RR+
RR–
AMP-REM
ANT-REM
ACC
TEST
23
OUT FL
11 IN RL
22
OUT RL
MUTE
Q441
MUTE
Q481
AUDIO OUT
REAR
J330
MUTE DRIVE
Q478,479
BATT
72
ACC IN
BATTERY CHECK
Q580-582
ACCESSORY
CHECK
Q631
TU+5V REG
Q1
MUTE
Q461
D479
D511
D580,581
FU601
CD
SECTION
A
CD
SECTION
B
D512
R-CH
• Signal Path
• R-CH is omitted due to same as L-CH.
: CD PLAY
: FM
: AUX
: AM
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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15 15
CDX-GT250M
CDX-GT250M
3-3. BLOCK DIAGRAM — DISPLAY SECTION —
(Page 13)
KEY ACKNOWLEDGE
SWITCH
Q664
X502
32.678kHz
79
80 82
83
41
28
29
27
40
52
76
77
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVER
IC901
KEYIN0
CLK
CE
LCD SO
2
DIMMER
1
BACK LIGHT
LCD CKO
LCD CE
KEYIN1
31 RE-IN0
32 RE-IN1
KEY ACK
XKEY ON
3AREASEL0
7NOSE DET
88 SYS RST
RESET
2 1
XIN
XOUT
OSC IN
OSC OUT
X501
18.432MHz
S702
RESET
63
64
62
COM4
COM1
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
D503
D510
5
|
50
•
55
51
|
54
|
S1
S48
|
CL
DI
CE
64
SIRCS IR
LED904,906–908,
911–919,941–944,951
LSW901–903,909,910,920
LCD BACK LIGHT
LED DRIVE
Q932
LED932
PANEL+B
REMOTE CONTROL
SIGNAL REVEIVER
IC971
2OUT
BU+3.3V
SYS RST
()
KEY MATRIX
RESET
IC602
LSW901–903,909,910,920
S904,906–908,911–919
(VOLUME)
PUSH DIAL SELECT
RE901
ROTARY
ENCODER
VDD VOUT
LCD BACK
LIGHT
CD
SECTION C
S502
FREQUENCY
SELECTOR
()
BU+3.3V
10K
9K
DIMMER
LED DRIVE
Q931
•
60
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6 3
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2
8 9
4 2
9 8
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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1616
CDX-GT250M
CDX-GT250M
• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
•All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
•All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
For printed wiring boards.
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•a: Through hole.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•A: B+ Line.
•B: B– Line.
•H: adjustment for repair.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
•CD mechanism (1/2) and (2/2) sections
no mark : CD PLAY
•Main (1/3), (2/3), (3/3) and Key sections
no mark : FM
(): AM/MW/LW
<>:CD PLAY
∗: Impossible to measure
•Voltagesaretaken withaVOM (Inputimpedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•Circled numbers refer to waveforms.
•Signal path.
J: CD PLAY
F: FM
f: AM
L: AUX
Caution:
Pattern face side: Parts onthepatternfaceside seenfromthe
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
• WAVEFORMS
— SERVO BOARD — (CD PLAY)
— MAIN BOARD —
3-4. CIRCUIT BOARDS LOCATION
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.
Q
C
These are omitted
EB
EThese are omitted CB
CThese are omitted BE
MAIN board
KEY board
SENSOR board SERVO board
tuner uni
t
(TU1)
1 IC2 5(FEI)
Approx.
1Vp-p
0 V
0.6 Vp-p
16.9344 MHz
Approx. 100 mVp-p
50 mV/DIV, 5 msec/DIV
0.5 V/DIV, 0.5 µ sec/DIV
2 IC2 6(TEI)
200 mV/DIV, 5 msec/DIV
6 IC2 oh (FPI2),
0.5 V/DIV, 0.5 µ sec/DIV
Approx. 400 mVp-p
3 IC2 wd (XI)
0.2 V/DIV, 0.2 µ sec/DIV
7 IC3 ia (X1)
0.5 V/DIV, 0.2 µ sec/DIV
1.1 Vp-p
12 MHz
4 IC2 ia (RFI)
0.5 V/DIV, 0.5 µ sec/DIV
5 IC2 of (FNI2),og (FNI1)
1.5 Vp-p
oj (FPI1)
1.5 Vp-p
0 V
0.7 Vp-p
32.768 MHz
1 IC501 i; (XIN)
0.8 Vp-p
18.432 MHz
2 IC501 is (OSC IN)
0.2 V/DIV, 0.1 µ sec/DIV
0.5 V/DIV, 0.1
µ sec/DIV
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3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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17 17
CDX-GT250M
CDX-GT250M
3-5. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 16 for Circuit Boards Location. : Uses unleaded solder.
(Page 20)
Ref. No. Location
• Semiconductor
Location
IC1 G-2
IC2 B-11
IC3 D-2
IC6 D-2
Q2 C-1
Q3 C-2
Q21 B-4
1
A
B
C
D
E
F
G
H
234567891011 12 13 14
X1
X2
SW3
SW2
1-689-230-
FMA4
FMA6
FMA3
FMA5
TP67
TP68
TP70
TP69
TP47
TP48
TP45
TP46
IC6
R43
R35
C16
C70
C14
C29
C30
C68
C133
R10
C132
R16
R14
R15
C17
C72
R20
R5
R6
R26
R147
Q3
R8
R133
R132
Q21
SW1
C66
C67
C48
C10
R27
R17
R81
C46
R33
R44
R23
R22
R58
R9
R62
R61
IC3
R2
R60
C7
R87
R86
R85
R144
R82
R141
R79
R25
R78
R77
R97
R98
R34
FB3
R55
FB2
C56
R24
Q2
IC1
C13
C80
C69
FB4
C18
R12
C71
C55
C54
R7
C31
C24
C15
R30
TP4
TP3
TP5
TP64
FMB3
FMB4
TP11
TP10
TP1
TP6
TP7
TP8
TP9
TP75
TP76
TP77
TP78 TP79
TP80
TP81
TP82
TP83
TP85
TP90
TP89
TP88
TP91
TP92
TP95
TP97
TP99
TP2
FMB5
IC2
TP86
TP87
TP84
TP98
TP14 TP15
TP65
TP61
TP62
TP51
TP71
TP72
TP74
TP63
TP28
TP22
TP21
TP96
TP42
TP43
TP44
TP29
TP34
TP35
TP30
TP12
TP24
TP25
TP31
TP13
TP38
TP41
TP49
TP50
TP53
TP32
TP33
TP36
TP37
TP39
TP52
BP60
TP23
TP26
TP27
BP10
R37
R36
R31
R32
R65
C40
C50
C23
R64
C60
R39
R63
X2
R54
C47
R53
R38
C43
R42
R52
C36
R28
CN2
R96
R41
C20
R84
R40
R83
R80
R75
R74
R69
R70
R73
R72
R71
R67
R68
C22
R57
C26
R21
C39
C62
C58
R13
CN1
R11
C11
C12
C53
C52
C49
C45
C44
C42
C41
C33
C32
C25
C19
R1
R18
R19
R29
C51
X1
16
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7
6 3
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0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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1818
CDX-GT250M
CDX-GT250M
(Page 19)
3-6. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 16 for Waveforms.
R14 R15
IC6
R132
R133
C10
TP21
TP22
TP28
TP29 TP30
TP42
TP45
TP46
C39
R41
R40
R39
R38 R27
R25
R26
R24
R23
R22
TP33
TP32
TP37
TP36
R58
TP39
TP38
TP47
TP48
TP41
TP35
TP34
R42
TP50
TP49
TP23
TP24
TP25
TP26
TP27
TP52
TP31
R7
R10
R17
R18
C14
TP51
R57
R55
TP53
IC2
C12
C13
C17
C56
C54
C24
C55
C51
C50
C53
C47
C49
C46
C22
C20
R28
FB2
FB3
C31
C30
R36
R30
C42
C41
C72
C60
C43
C58
R29 R19
C132
C80
C133
C26
C25 C32
C33
R33
R31
R32
R34
C36
TP43
TP44
C29
C23
C40 R37
Q2
Q3
C15 R43
C44R44
C45
R53
R52
R54
C18
C48
C52
C19
R13
R12 C16
R16
R11
C11
FB4
CN1
X2
Q21
R35
R20
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7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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19 19
CDX-GT250M
CDX-GT250M
• Refer to page 16 for Waveforms.
• Refer to page 26 for IC Block Diagrams.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/2) — • Refer to page 28 for IC Pin Descriptions of IC3.
(Page 23)
(Page 18)
IC B/D
R73
R72
R71
R83
TP67
TP68
TP69
TP72
TP63
TP64
TP65
R85
R77
R68
R67
R69
R60
R61
R62
R79
R80
R81
R82
R84
R70
TP15
TP14
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP71
TP61
TP62
R64
R65
R21
TP12
TP13
R141
R147
TP74
TP75
TP76
TP77
TP78
TP79
TP80
TP81
TP82
TP83
TP84
TP85
TP86
TP87
TP88
TP89
TP90
TP91
TP92
TP97
TP98
TP99
BP60
BP10
C69
C70
C68 C66
C62
C71
SW3
SW2
SW4
SW1
M901
M902
M903
C7
IC1
R96
R74
R87
TP70
R75
R97
R98
R8
R5
R6
R2
R1
C67
CN2
R78
X1
R86
R144
IC3
R9
R63
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7
6 3
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0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

2020
CDX-GT250M
CDX-GT250M
(Page 24)
3-8. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 16 for Circuit Boards Location. : Uses unleaded solder.
(Page 17)
1
A
B
C
D
E
F
G
H
I
J
234567891011 12 13 14
S702
RESET
J330
AUDIO OUT
REAR0
LR
J1
(ANTENNA)
9K
10K
FREQUENCY
SELECT
X501
Q478
Q479
Q582
C502
R508
R509
R513
R514
C504
C508
C507
R510
R511
R512
Q664
R517
R528
C413
R405
R406
R407
R409
R408
D1
C6
R2
R3
C501
R503
R582
D580
R609
D609
R632
R634
R633
Q631
R636
Q580
R521
R522
R585
R584
D581
R583
R532
R531
JC753
C343
R674
R671
R672
R534
R756
C755
R752
C7
R479
D479
C770
C769
R1
R536
R535
C404
C405
C756
Q1
R537
FMB3
FMB4
C509
R504
R505 R673
L1
R540
R541
IC401
C510
C512
C513
C514
C516
R544
R507
R545
R546
JC681
R471
R472
Q471
R481
R482
Q481
R461 R451
C763
D719 D503
R4
R5
R518
R557
R558
R563
C617
C618
C764
C765
C751
C750
C602
R568
C12
C13
R410
R411
R301
R302
C306
C308
C309
C310
FB603
FB605
FB604
C771
FB1
FB309
FB303
FB307
FB308
JC527
C484 C474
JC754
JC755
R533
D512
IC602
D510
D511
R431
Q431
R432
R441
Q441
R442
FB302
FB304
C312
R561
R565
R567
R529
R570
R12
R13
C519
R502
Q461
Q451
R462
R452
JC1
FB310
FB305
R401
JC533
R601
D502 R519
JC504
L301
C442
C432
C452 C462
C774C775
R575
R577
R566
L501
R542
R543
R547
R556
R578
E
JC756
R539
FB501
FB606
R675
R676
R677
R679
R681
D617
R661
R662
R663
R664
JC501
R757
Q581
R506
R550
R691
R692
IC901
R901
R902
R903
R904
R905
R906
R907
R910
C901
C902
C905
R911
JC795
C917
C918
D903
R912
R913
R914
C776
C410
C411
C435
C455
C465
C445
IC501
FB410
FB411
JW10
JW11
JW12
JW13
JW29
JW101
R631
JW104
JW105
C431
C461 C451
C401
S702
C301
C302
C601
TU1
X502
C758
C441
D757
D759
D760
YEL
D601
C631
JW9
D758
C754
D754
C407
C406
JW1
JW2
JW95
JW96
JW97
C305
JW91
JW115
C471
C481
JW131
JW132
D755
D756
C753
C479
C412
C4
C5
C511
C503
D761
D762
S502
JW3
JW109
JW144
JW145
JW146
L601
CNP301
JW142
JW143
JW93
JW16
JW14
JW17
JW56
JW50
CN601
FU601
YEL
JW120
JW22
JW118
C622
C623
JW18
JW82
JW75
JW149
JW45
X501
JW6
JW8
JW137
JW7
JW30
JW99
JW28
JW117
JW62
JW100
JW66
JW20
JW44
JW88
JW42
JW5
D753
D752
D751
IC750
JW139
JW26
JW71
JW76
JW80
JW108
JW54
JW89
JW103
JW69
JW40
JW67
JW68
JW74
JW133
JW154
JW155
JW70
JW83
JW121
JW122
JW21
JW164
JW148
JW15
JW24
JW23
JW25
JW153
JW106
JW156
JW32
JW31
JW49
JW48
JW51
JW52
JW127
JW119
JW65
JW87
JW58
JW63
JW163
JW140
JW160
JW161
JW162
JW81
JW129
JW130
JW150
JW72
JW124
JW166
JW167
JW123
JW165
JW168
JW94
JW169
JW111
JW39
JW92
JW138
JW27
CN701
C903
JW90
1-868-117-
21
(21)
D704
Ref. No. Location
• Semiconductor Location
D1 F-3
D479 E-6
D502 I-7
D503 I-5
D510 H-8
D511 F-6
D512 H-8
D580 F-11
D581 F-11
D601 C-10
D609 D-8
D617 C-9
D719 I-4
D751 D-7
D752 D-7
D753 D-7
D754 D-7
D755 C-5
D756 C-6
D757 C-6
D758 C-6
D759 D-8
D760 D-8
D761 C-9
D762 D-9
D903 I-3
IC51 H-2
IC401 E-3
IC501 H-6
IC602 I-9
IC750 B-6
IC901 H-2
Q1 F-2
Q431 B-4
Q441 B-4
Q451 C-4
Q461 D-4
Q471 B-3
Q478 E-6
Q479 E-5
Q481 C-3
Q580 F-11
Q581 I-10
Q582 I-10
Q631 H-10
Q664 I-7
Ref. No. Location
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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