Sony CDX-GT720 / CDX-GT72W / CDX-GT770 Service Manual ▷ View online
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
33
33
5-10. SCHEMATIC DIAGRAM – BASE PANEL Section –
S902
S901
CN904
CN905
(Page 35)
(Page 31)
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
34
34
5-11. PRINTED WIRING BOARDS – DISPLAY Section –
•
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
LED921
S918
IC903
S911
LED920
LED922
LED923
S919
R912
S912
S913
S916
S91
7
S914
S915
LED902
LED904
LED901
LED903
LED907
LED906
LED905
LED928
LED930
R902
C917
C908
R957
C901
C90
3
C910
C914
C915
C916
C919
C923
C92
5
C956 C957
C958
D931
D932
D933
D934
D935
D936
D937
D93
8
D951
D952
D953
D954
D955
D956
D956
FB901
FB902
FB903
FB905
FB908
FB911
FB912
FB913
FB914
R903
R904
R905
R906
R907
R908
R909
FB915
FB916
FB920
FB921
IC901
FB951
FB952
Q923
Q924
JC907
D962
R910
R911
Q920
Q921
R901
GRN
YEL
ORG
RED
BRN
J991
AUX
GRN
YEL
ORG
RED
BRN
R91
6
R917
R918
R919
R920
R948
R949
R950
C911
R951
R952
R95
3
R954
R955
R956
R95
8
R959
R960
R961
R962
R965
FB953
FB954
FB955
X901
C904
R972
R981
R970
R974
R986
R934
R932
R978
R975
R98
9
R988
R933
R976
R931
R993
R977
R983
R984
R985
R971
R987
R982
R990 R991
R992
R964
R963
R973
R994
R979
CN902
FL900
FLUORESCENT INDICATOR TUBE
C909
ENC901
MODE
LED920–923
(RING ILLUMINATION)
LED901,S919
LED902,
S915
SHUF
LED904,
S916
LIST
LED930,
S914
BACK
LED928,
S913
DSPL
LED903,
S912
SOURCE
IC903
2
3
1
4
;
LED906,
S911
LED907,
S917
SCRL
LED905,
S918
OFF
1-875-876-
(11)
11
1-872-395-
(21)
21
1-875-876-
(11)
11
ENC901
PUSH ENTER/ SOUND/MENU
(VOLUME)
B
BASE PANEL BOARD
CN904
(GT72W/GT720)
LIST/CAT
(GT770)
(Page 32)
Ref. No. Location
• Semiconductor Location
D931
G-10
D932
G-10
D933
G-10
D934
G-10
D935
G-9
D936
G-9
D937
G-9
Ref. No. Location
D938
D938
G-9
D951
G-11
D955
G-6
D956
G-6
D962
G-6
IC901
G-7
Ref. No. Location
IC903
IC903
B-14
LED901 C-2
LED902 B-2
LED903 C-2
LED904 B-2
LED905 C-13
LED902 B-2
LED903 C-2
LED904 B-2
LED905 C-13
Ref. No. Location
LED906 B-13
LED907 A-13
LED920 C-4
LED921 C-3
LED922 C-5
LED923 B-4
LED928 C-2
LED906 B-13
LED907 A-13
LED920 C-4
LED921 C-3
LED922 C-5
LED923 B-4
LED928 C-2
Ref. No. Location
LED930 B-2
LED930 B-2
Q920
H-5
Q921
H-5
Q923
I-5
Q924
H-5
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
35
35
5-12. SCHEMATIC DIAGRAM – DISPLAY Section –
• See page 25 for waveform. • See page 41 for IC Pin Function Description of IC901.
FB911
FB902
FB903
FB912
FB913
R956
TP901
TP902
TP903
TP904
TP903
TP904
TP905
TP911
TP912
TP913
TP914
TP913
TP914
TP915
R919
R948
C914
C925
FB951
FB952
FB952
R957
FB921
FB920
R901
R902
R903
R904
R905
R906
R907
R908 R909 R910
R912
R916
R951
R953
R955
R958
R960
R961
R962
FB901
R911
R949
D951
D955
D956
D962
R988
R931
R932 R933
R934
R976 R977
R978
R992
R971
R974
R975
R983
R989
R987
R990
R991
R970
R972
R981
R984
R982
R986
R993
R973
R985
R994
FB953
FB954
FB955
FB954
FB955
D931
D932
D933
D934
D935
D932
D933
D934
D935
D936
C903
D937
D938
C904
D938
C904
JC907
C916
C911
C923
C909
C910
C957
C958
C956
R963
R964
C901
C915
C919
S911
S912
S913
S914
S915
S916
S919
S918
S917
CN902
IC903
R959
FB908
FB905
C917
R954
R965
FB914
FB915
FB916
R952
R950
R920
R917
R918
R917
R918
R979
J991
X901
ENC901(1/2)
ENC901(2/2)
Q920
Q924
Q921
Q923
D954
D953
D952
FL900
LED903
LED901
LED907
LED905
LED904
LED902
LED906
LED920
LED922
LED921
LED923
LED928
LED930
IC901
(Page 33)
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
36
36
• IC Block Diagrams
IC401 BD3442FS-E2 (MAIN Board (1/4))
1
2
BUS-R
100k
100k
100k
100k
100k
100k
250k
250k
250k
BUS-L
TU-R 3
4
TU-L
5
CD-R
6
CD-L
7
AUX-R
8
AUX-G
9
AUX-L
10
DS32
11
DS11
12
DS22
13
EBIAS
14
DS21
15
DS11
16
DS31
26 OUTF1
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 OUTF2
24 OUTR1
23 OUTR2
FADER
FADER
22 OUTS1
21
20
OUTS2
19
ADJ
18
SOUT
17
DATA
CLK
FADER
FADER
LPF
EFFECT
INPUT
GAIN
FADER
IC402 NJM2792V(TE2) (MAIN Board (1/4))
1
2
3
6
5
4
17
18
19
20
7
10
15
16
12
11
14
13
8
9
LIFT AMP
LIFT AMP
CIN (L)
OUT (RL)
RL-
RL+
VCC
RR+
RR-
OUT (RR)
CIN (R)
GND (R)
COUT (R)
OUT (FR)
FR-
FR+
REF
FL+
FL-
OUT (FL)
COUT (L)
GND (L)
SIGNAL AMP
FRONT-RIGHT
REAR-RIGHT
FRONT-LEFT
REAR-LEFT
SIGNAL AMP
SIGNAL AMP
SIGNAL AMP
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