Sony CDX-GT23 Service Manual ▷ View online
CDX-GT23
CDX-GT23
17
17
SECTION 5
DIAGRAMS
1
ANT
SCL
SDA
SDA
CDMON
CDON
CDON
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
I2C BUS CONTROLLED POWER AMP/
MULTIPLE VOLTAGE REGULATOR
IC750
SYSTEM CONTROL
IC501 (1/2)
CN601
(REAR)
(FRONT)
BATT
6 CD-LCH
5 CD-RCH
5 CD-RCH
6
S-METER
7
TUN MUTE
39 VSM
5
QUALITY
9
RDS
38 QUALITY
8
MUTE CONDITION
53 TU ATTIN
56 DAVN
BU+3.3V
99 CDM ON
98 CD ON
93 Z MUTE
98 CD ON
93 Z MUTE
11
TU VDD(TU+5V)
4
L-CH
3
R-CH
BU+3.3V
10
VCC+8.3V
12 TUATT
13 NSMASK
CD ON
CDM ON
AUX AMP
IC901
CD R
4 TU-LCH
3 TU-RCH
3 TU-RCH
CD-RCH
TU-RCH
AUDIO+8.3V
AUDIO+8.3V
5
3
3
OUT FL+
OUT FL–
9
7
7
OUT RL+
OUT RL–
27
R-CH
ANT REM
37
AUDIO+8.3V
35
VP
20
VP1
6
VP2
B.UP+B
31
33
33
SERVO+3.3V
MECHA+6V
34
PANEL+B
16
MUTE
2 SDA
AUDIO+8.3V
BU+3.3V
SERVO+3.3V
MECHA+6V
PANEL+B
BU+3.3V
SERVO+3.3V
MECHA+6V
PANEL+B
4 SCL
SDA
SCL
SCL
16 BEEP
22 STB
25 DIAG
22 STB
25 DIAG
7
10
12
11
16
1
9
9
2
4
3
6
17
18
18
SCL
SDA
SCL
SDA
SCL
SDA
9
86
VOLATT
ATT
33
I2C CKO
34
I2C SIO
BUIN
12 IN FL
FL+
FL–
FL–
RL+
RL–
RL–
FR+
FR–
RR+
RR–
FR–
RR+
RR–
ANT-REM
ACC
MUTE
Q461
MUTE CONTROL
SWITCH
Q478,479
54
88
SYSRST
60
UNISCK
RESET
SYSRST
72
ACC IN
ACCESSORY CHECK
Q631
BATT
OVER VOLTAGE
CHECK
Q580
LOW VOLTAGE
CHECK
Q581,582
MUTE
Q441
15
TEST
D479
FU601
R-CH
11
12
12
OUT–RL
OUT–RR
R-CH
13
14
14
OUT–FL
OUT–FR
D512
D581
BATT
D580
DISPLAY
SECTION
A
BATT
TUNER
+5V REG
Q1
NOISE MASK
SWITCH
Q22
RDS+3.3V
SWITCH
Q51
RDS DEMODULATOR
IC51
15
E2P VDD
13
TU SCL
14
E2P SCL
17
E2P SDA
16
TU SDA
11 IN RL
73
TEST IN
8
DIAG
26
AMPSTB
5
BEEP
AUX
J901
10 AUX-LCH
7 AUX-RCH
AUX-RCH
AUX-RCH
CD-RCH
TU-RCH
ZMUTE
96 EJECT OK
EJECT OK
87 BUS ON
BUS ON
Z MUTE
SYS RST
MECHA+6V
BU+3.3V
BU+3.3V
SERVO+3.3V
BU IN
UNI SO
UNI SI
UNI CLK
DR+6V
BU+3.3V
A+3.3V
CDON
CDMON
ZMUTE
A ATT
A ATT
EJECT OK
EJECT OK
SYSRST
BU IN
BUS ON
BUS ON
UNISO
UNICLK
UNISI
D+3.3V
CD
MECHANISM
UNIT
(MG-101TA)
11
SCL
15
INTN
16 MPX
XTO
XTI
12
SDA
SCL
SDA
SDA
1
VDDA
7
VDDD
10
9
X51
8.664MHz
BUIN
UNISI
UNISO
UNISCK
A ATT
30
BATT
30 RDS ON
24 EEP SIO
25 EEP CKO
59
UNISO
58
UNISI
D511
D510
• Signal Path
• R-CH is omitted due to same as L-CH.
J
: CD PLAY
K
: FM
L
: AUX
f
:MW/LW
K
K
K
K
K
K
K
K
K
K
J
J
K
L
L
K
f
K
5-1. BLOCK DIAGRAM – MAIN Section –
(Page 18)
CDX-GT23
CDX-GT23
18
18
For Schematic Diagrams.
Note:
• All capacitors are in
• 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
Ω and
1
/
4
W or less unless otherwise
specifi ed.
• f :
internal
component.
•
C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
•
A : B+ Line.
•
B : B– Line.
•
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
(
)
:
MW/LW
<
> : CD PLAY
*
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J :
CD
PLAY
F :
FM
f :
MW/LW
L :
AUX
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.)
• Indication of transistor.
5-2. BLOCK DIAGRAM – DISPLAY Section –
(Page 17)
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
RESET
MAIN
SECTION
A
83
82
41
27
28
28
40
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVE
IC901
KEYIN0
DI
CL
CL
LCD CE
LCD SO
LCD CKO
KEYIN1
31 RE–IN0
32 RE–IN1
32 RE–IN1
52 KEYACK
76 AD ON
77 RESET
OSCOUT
OSCIN
X501
18.432MHz
48
46
47
CE
BU+3.3V
KEY MATRIX
LSW901–912,
S901–904
80
79
XOUT
XIN
X502
32.768kHz
7
NOSE SW
(VOLUME)
PUSH SELECT
RE901
ROTARY
ENCODER
RESET
IC602
LCD901
LIQUID CRYSTAL
DISPLAY PANEL
PANEL+B
LED931,941,943–945,
LSW901–912
KEY
ACKNOWLEDGE
SWITCH
Q664
D503
29
C
B
These are omitted.
E
Q
C E
B
These are omitted.
These are omitted.
C B
E
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
• Waveforms
– MAIN Board –
– MAIN Board –
1.1 Vp-p
8.664 MHz
0.7 Vp-p
32.768 kHz
0.8 Vp-p
18.432 MHz
0.2 V/DIV, 10
μsec/DIV
0.5 V/DIV, 0.1
μsec/DIV
0.2 V/DIV, 0.1
μsec/DIV
IC51 (XTI)
IC501 J (XIN)
IC501 JE (OSC IN)
CDX-GT23
CDX-GT23
19
19
(Page 23)
5-3. PRINTED WIRING BOARD – MAIN Section –
•
: Uses unleaded solder.
D1
E-2
D479
E-6
D503
G-8
D510
G-8
D511
F-6
D512
H-8
D580
F-10
D581
E-10
D601
C-9
D609
C-8
D617
B-8
D719
H-4
D751
B-6
D752
B-6
D753
B-6
D754
B-6
D755
C-6
D756
C-6
D757
C-7
D758
C-6
D760
C-7
D762
C-8
D903
H-2
IC51
G-2
IC401
D-3
IC501
G-6
IC602
H-8
IC750
B-5
IC901
G-2
Q1
E-2
Q22
D-2
Q51
F-2
Q431
B-3
Q441
B-3
Q451
C-4
Q461
C-4
Q478
E-5
Q479
E-5
Q580
E-10
Q581
H-9
Q582
H-9
Q631
G-9
Q664
H-6
Ref. No. Location
• Semiconductor Location
Ref. No. Location
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
IC602
IC901
IC51
IC401
IC50
1
IC750
1-871-015-
41
Q478
Q479
Q582
R508
R509
R513
R514
R514
C504
FB501
C508
C507
C507
R510
R511 R512
Q664
R517
R524
R525
R527
R527
R528
C413
R406
R407
R409
R408
D1
C6
R2
R3
C2
C1
Q22
R29
C501
R503
R582
D580
R609
D609
R632
R634
R633
R633
Q631
R636
Q580
R521
R522
R585
R584
D581
R58
3
R532
R531
JC753
C343
R674
R671
R672
R534
R756
C755
R752
C7
R479 D479
C770
R1
R536
R535
C404
C405
C405
C756
R537
FMB3
FMB4
C509
R504
R505
R673
L1
R540
R541
C510
C512
C513
C514
C516
R544
C53
C54
C55
C56
C57
C58
C59
C60
C60
C62
R51
R52
R52
R53
R54
R55
R56
R57
R58
JC681
R550
R461
R451
C763
D719
R4
R5
R6
R7
R8
R9
R556
R518
R557
R563
R551
C617
C764
C765
C751
C750
C602
C12
C13
C13
R59
Q51
R60
R61
R301
R302
C306
C308
C309
C310
FB605
FB604
C771
R573
FB1
FB309
FB305
FB303
FB307
FB308
JC527
JC754
JC755
R533
D512
D510
D511
R431
Q431
R432
R441
Q441
R442
FB302
FB304
C312
L51
R561
R565
R567
R570
R12
R13
C519
R502
Q461
Q451
R462
R452
FB310
R401
JC533
R601
R519
D503
JC504
L301
C774
C775
R575
R577
R566
L501
R542
R543
R547
R578
R539
FB606
R675
R676
R677
R679
R681
D617
R661
R662
R663
R664
JC501
R757
Q581
R506
R691
R692
R901
R902
R903
R904
R905
R906
R907
R910
C901
C902
C905
R911
JC795
C917
C918
D903
R912
R913
R914
C776
R694
C435
C455
C465
C445
C442
C432
C452
C462
C462
C769
C522
C523
R402
R403
R403
R559
C63
C64
C422
C423
JC625
JC796
R635
JC20
Q1
FMB5
FMB6
C720
FB20
R631
C601
TU1
X51
X502
D757
D760
D601
D754
D75
5
D756
D762
L601
CNP301
CN601
X501
D753
D752
D75
1
CN701
J561
JW63
JW62
JW44
JW119
JW174
JW75
JW86
JW68
JW139
JW154
JW155
JW168
JW6
7
JW156
JW60
JW89
JW150
JW72
JW124
JW91
JW163
JW164
JW102
JW88
JW22
JW42
JW3
JW58
JW65
JW82
JW53
JW51
JW48
JW49
JW87
JW40
JW121
JW80
JW83
JW90
JW162
JW161
JW160
JW100
JW101
JW94
JW130
JW66
JW18
JW81
JW123
JW167
JW166
JW103
JW6
9
JW7
4
JW1
33
JW1
26
JW54
JW138
JW153
JW92
JW1
05
JW104
JW2
4
JW23
JW25
JW1
42
JW1
43
JW1
JW2
JW26
JW17
JW50
JW56
JW28
JW99
JW30
JW29
JW118
JW120
JW145
JW45
JW146
JW1
49
JW106
JW115
JW117
JW109
JW125
JW108
JW70
JW7
6
JW71
JW1
69
JW129
JW27
C441
C431
C451
C461
C401
C754
C407
C406
C3
C4
C5
C51
C903
C631
C753
C758
C479
C302
C301
C305
C511
C503
C412
JW107
JW52
D758
JW14
JW15
JW93
JW144
JW9
JW10
JW11
JW12
JW13
JW21
JW5
JW32
JW34
JW31
JW35
JW175
FU601
JW176
JW177
JW178
JW179
JW180
JW181
JW182
JW183
JW184
JW185
JW186
JW188
JW16
C624
JW122
JW85
JW84
JW132
JW131
JW98
JW95
JW96
JW97
C622
J1
(ANTENNA)
X501
CD
MECHANISM
UNIT
(MG-101TC)
(CHASSIS)
(CHASSIS)
A
KEY BOARD CN901
CDX-GT23
CDX-GT23
20
20
IC B/D
IC B/D
C903
JW107
R901
R479
C441
C431
R401
C412
C401
C451
C461
R406
R407
R408
C479
JW102
R902
R910
R913
R912
C5
R4
R5
R1
R9
R8
C3
JW60
JW126
R6
R52
R60
R61
JW84
JW85
R51
R55
R58
R59
R431
R451
R441
R461
R432
R452
R442
R462
X51
R904
R903
R907
R911
R914
D1
IC51
C2
C1
C1
C7
C12
C13
C6
C57
C58
L51
L1
C53
C54
C55
C56
C62
C59
C413
C465
C462
C445
C442
C455
C452
C435
C432
C905
C918
R29
R7
C4
C51
R54
C64
C63
C60
C404
C406
C405
C407
IC901
R906
R905
C902
C901
C423
C422
R402
R403
R409
Q478
Q479
D479
C917
Q431
Q451
Q441
Q461
J1
Q1
Q22
Q51
TU1
R13
R12
R3
R2
R53
R56
R57
FB1
IC401
D903
5-4. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
• See page 18 for waveform. • See page 25 for IC Block Diagrams.
(Page 21)
(Page 22)
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