Sony CDX-GT420U / CDX-GT424U / CDX-GT427UE / CDX-GT470U / CDX-GT470US Service Manual ▷ View online
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
29
29
IC B/D
IC B/D
IC B/D
X502
C409
R351
R401
R402
D353
R903
C406
C407
R826
R827
R847
R824
R831
R830
R829
R841
R840
R838
R837
R501
R507
R509
R510
R511
R512
R517
R547
R549
R550
R551
R551
R552
R553
R560
R561
J370
R405
R504
R565
R566
R567
R567
R846
R350
JC500
JC501
JC503
JC504
R848
R849
R905
R554
R564
R823
Q810
R842
R843
R845
R851
R852
C819
CN350
C817
IC805
L801
L802
Q807
Q809
Q811
R545
S501
R555
C415
L407
L405
L406
C412
L401
L410
C402
C827
C809
C816
C812
C811
C810
C814
C832
C826
C824
C513
C512
C511
C510
C509
C508
C507
C505
R534
R535
R523
R524
C503
C501
R502
R562
R505
R844
JC502
R548
R559
R503
R508
C506
C853
C813
R828
R822
C808
L409
C418
C419
C401
R902
R515
JC400
R904
C403
R519
R513
R518
D501
IC501
R825
Q808
JC506
JC507
X501
D803
R853
Q80
6
L370
R370
R371
R371
D807
D802
D805
IC804
C516
R557
R538
R544
R542
R540
R543
R541
R539
R537
R541
R539
R537
R531
R532
R522
IC803
C502
C504
C514
C515
(EXCEPT GT427UE)
(GT427UE)
5-6. SCHEMATIC DIAGRAM – MAIN Section (3/3) –
• See page 25 for Waveforms. • See page 33 for IC Block Diagrams. • See page 34 for IC Pin Function Description of IC501.
(Page 27)
(Page 28)
Ver. 1.1
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
30
30
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
FB901
FB902
FB903
J901
AUX
IC971
IC971
1
2
4
3
R945
LED
931
S905
S906
S903
S904
S901
LED941,
S901
R902
S902
R975
LSW917
LED951
LED952
LED953
LSW909
LSW910
LSW911
R946
R903
R904
R974
C971
R953
LED941
LSW907
LSW912
LSW913
LSW914
LSW915
LSW916
LSW909
LSW910
LSW911
LSW912
LSW913
LSW914
LSW915
LSW916
LSW917
LSW908
LED942
LED943
LED946
LED944
LED945
R911
R922
CN901
D90
3
D994
R901
D993
D991
D992
D909
D908
D951
D95
3
D955
FB906
FB907
C905
RB901
LF901
R931
R932
Q931
Q932
D982
R987
D981
R934
R984
C983
C98
4
C981
C986
R97
7
R97
8
R979
R981
R982
D804
FB904
4
3
2
2
1
R921
R941
R942
R943
R944
R948
R947
R949
R950
R95
2
R907
R971
R972
R905
R906
R908
R909
R910
R912
R955
R956
IC901
R985 R986
R913
R916
R915
R951
R914
R954
R992
Q801
C903
C901
CN902
CN902
(USB)
RE901
RE901
A
MAIN BOARD CN370
1
52
LIQUID CRYSTAL DISPLAY PANEL
OFF
BROWSE
LED943,
S905
LSW908
LSW907
BACK
LED951–953
(RING ILLUMINATION)
3/REP
4/SHUF
5/DM+
EQ
1/ALBM–
2/ALBM+
6/PAUSE
DSPL/SCRL
1-874-900-
1-874-900-
(11)
11
1-874-901-
(11)
11
1-874-901- (11)
11
(11)
11
PUSH ENTER/ SELECT
(VOLUME)
LED942,
S902
LCD901
LED946,
S906
SOURCE
LED944,
S903
LED931
(LCD BACK LIGHT)
1
5
4
3
2
AF/TA/PTY
(AEP,UK,RU)
(EXCEPT AEP,UK,RU)
BTM
LED945,
S904
MODE
N
SEEK–
.
SEEK+
;
5-7. PRINTED WIRING BOARDS – KEY Section –
•
: Uses unleaded solder.
(Page 26)
Ref. No. Location
• Semiconductor
Location
D804
H-9
D903
H-10
D908
H-11
D909
H-11
D981
H-10
D982
H-9
D991
H-10
D992
H-10
D993
H-10
D994
H-10
IC901
H-7
IC971
D-3
LED931 B-12
LED941 A-12
LED942 A-2
LED943 B-2
LED944 B-4
LED945 C-4
LED946 C-2
LED951 B-3
LED952 C-4
LED953 C-2
LED941 A-12
LED942 A-2
LED943 B-2
LED944 B-4
LED945 C-4
LED946 C-2
LED951 B-3
LED952 C-4
LED953 C-2
Q801
G-4
Q931
H-9
Q932
H-9
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
31
31
5-8. SCHEMATIC DIAGRAM – KEY Section –
(Page 28)
R902
R903
R904
R906
R909
R910
R911
R913
R912
R914
R915
R916
R905
R981
R982
D982
R932
R934
R931
R975
R974
D981
D991
D992
D993
D955
D953
D951
R907
R908
R987
R977
R979
R978
R921
R922
CN901
FB904
LF901
C905
FB901
FB902
FB903
FB902
FB903
C901
R901
S901
S902
S90
3
LSW909(1/2)
LSW910(1/2)
LSW911(1/2)
LSW912(1/2)
LSW913(1/2)
LSW914(1/2)
LSW915(1/2)
LSW916(1/2)
LSW917(1/2)
LSW907(1/2)
S90
5
LSW
908(1/2)
S906
C981
C971
RB901
D994
D908
D909
D903
C903
S904
C986
C984
C983
R984
R985
R986
R985
R986
IC971
LSW917(2/2)
LSW916(2/2)
LSW914(2/2)
LSW915(2/2)
LSW913(2/2)
LSW912(2/2)
LSW911(2/2)
LSW910(2/2)
LSW909(2/2)
LSW908(2/2)
LSW907(2/2)
D804
Q932
Q801
LCD901
RE901
J901
R992
FB907
FB906
CN902
LED943
LED931
LED946
R955
R956
LED941
R941
R942
LED942
R943
R944
R945
LED944
LED945
R946
R947
R948
R949
R950
R951
R952
R953
R954
LED951
LED952
LED953
R971
R972
IC901
Q931
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
32
32
• IC Block Diagrams
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
BATTERY
DETECTION
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOADDUMP
PROTECTION
TEMPERATURE
PROTECTION
BACK-UP
SWITCH
REGULATOR
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
TAB
OUT–FL–
OUT–FL+
OUT–RL–
OUT–RL+
IN–RL
S–GND
IN–RR
OUT–RR+
OUT–RR–
OUT–FR+
OUT–FR–
DIAG
ANT–REM
AMP–REM
SERVO3.3V
MECH6V
VP
BU+B
SDA
SCL
VP2
PGND1
SVR
IN–FL
IN–FR
BEEP
PGND3
VP1
STB
PGND4
RST
CRES
AUDIO+B
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
IC300 TDA8588AJ/N2/R1/M5
(GT420U: AEP, UK, RU/GT424U) (MAIN Board (1/3))
IC300 TDA8588AJ/N2/R1
(GT420U: US/GT427UE/GT470U/GT470US) (MAIN Board (1/3))
(GT420U: AEP, UK, RU/GT424U) (MAIN Board (1/3))
IC300 TDA8588AJ/N2/R1
(GT420U: US/GT427UE/GT470U/GT470US) (MAIN Board (1/3))
IC50 TDA7333013TR (AEP, UK, RU) (MAIN Board (2/3))
IC401 BD3442FS-E2 (MAIN Board (2/3))
VDDA
INTERPOLATOR
RAM
BUFFER
&
CONTROL
LOGIC
TEST LOGIC
&
PIN MUX'S
I
2
C/SPI
INTERFACE
BAND PASS
FILTER
SIGMA DELTA
CONVERTER
SINC4
FILTER
REF3
REF2
REF1
VSS
VDDD
RESETN
TM
1
MPX
16
CSN
SDAOUT
RDSREG
3
INTN
MPX
SINC4REG
SDAIN
SCK
SCK
SPI
TESTREG
TESTREG
14
2
3
4
5
6
7
8
INTN
15
SA
13
SDA
12
SCL
11
OSCILLATOR
XTO
10
XTI
9
RDS
DEMODULATOR &
SYNCHRONIZATION
2
1
2
BUS-RCH
100k
100k
100k
100k
100k
100k
250k
250k
250k
BUS-LCH
TU-RCH 3
4
TU-LCH
5
CD-RCH
6
CD-LCH
7
AUX-RCH
8
AUX-GND
9
AUX-LCH
10
DS3-L
11
DS1-L
12
DS2-L
13
EBIAS
14
DS2-R
15
DS1-R
16
DS3-R
26 OUT-FR
27 VCC
VCC
VCC2
28 MUTE
29 SCL
30 SDA
31 GND
32 FIL
INPUT
SELECTOR
VOLUME1
/MUTE
VOLUME2
I2C
BUS
LOGIC
TREBLE
/BASS
/MIDDLE
SPECTRUM
ANALYZER
FADER
25 OUT-FL
24 OUT-RR
23 OUT-RL
FADER
FADER
22 SUBOUT-R
21
20
SUBOUT-L
19
ADJ
18
SAOUT
17
SADA
SACLK
FADER
FADER
LPF
EFFECT
INPUT
GAIN
FADER
Ver. 1.1
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