Read Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual online
CDX-GT270MP/GT274MP/GT277ME/GT320MP
CDX-GT270MP/GT274MP/GT277ME/GT320MP
25
25
4-5. SCHEMATIC DIAGRAM - KEY Board -
• See page 20 for Waveforms. • See page 26 for IC Block Diagrams.
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF THE
AUX JACK (J901)” (See page 5), if replacing the Ref. No. J901.
(2/2)
BOARD
A
CN101
MAIN
IC B/D
11
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
5.4
3.6
1.8
4
5
0
3.3
0
5.4
5.4
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
5.4
5.3
5.4
0
5.4
0
C912
0.1
1k
R906
RKZ6.8B2KGP1
D907
RKZ6.8B2KGP1
D909
RKZ6.8B2KGP1
D908
RKZ18B2KGP1
D906
D935
RKZ5.1B2KGP1
0
R975
0
R996
DA2J10100L
D936
VCC
OUT
GND
PNJ4813M01S0
IC902
1
2
3
100
R955
1
7
8
9
10
11
12
5
6
14
19 18 17
13
16
20
15
23
24
27
21
28
26 25
22
31
33
35
30
32
36
34
29
2
3
4
37
LCD901
1000p
C930
39k
R994
0.47
C922
R927
1.5k
R929
2.2k
R924
1k
R925
1k
R923
820
R928
1.8k
R933
R941
R944
R946
R945
R947
R949
LED934
LED936
LED933
LED932
LED931
LED946
LED943
LED945
LED939
LED944
LED947
LED937
LED935
LED942
LED938
PT16511
IC903
1
BACK-LIGHT
2
KEY
-ILL
3
S[19]
4
S[20]
5
S[21]
6
S[22]
7
S[23]
8
S[24]
9
S[25]
10
S[33]
11
S[32]
12
S[31]
13
S[30]
14
S[29]
15
S[28]
16
S[27]
17
S[26]
18
S[1]
19
S[2]
20
S[18]
21
S[17]
22
S[16]
23
S[15]
24
S[14]
25
S[13]
26
S[12]
27
S[1
1]
28
S[10]
29
S[9]
30
S[8]
31
S[7]
32
S[6]
33
S[5]
34
S[4]
35
COM[1]
36
COM[2]
37 COM[3]
38 COM[4]
39 S[3]
40 VDD
41 VDD1
42 VDD2
43 VSS
44 OSC
45 INH
46 CE
47 CL
48 DI
RE901
2
4
5
3
1
6
7
LED941
LED940
R943
R942
J901
R956
LTC014TUBFS8TL
Q901
LTC914TUBFS8TL
Q931
FB902
FB901
FB903
R937
R939
R940
R931
R932
R934
R935
R936
R938
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15P
CN902
D-GND
KEY-GND
AUX-LCH
AUX-RCH
AUX-GND
RE-0
RE-1
KEY-1
KEY-0
SIRCS
DATA-LCD
CE-LCD
CLK-LCD
+B
PANEL
NHSW157AT
LED901
R926
1.2k
R921
1.8k
2.2k
R922
R916
820
R920
1.5k
R918
1k
R919
1.2k
R917
1k
C928
0.1
R953
150
R954
150
R951
120
R950
120
R952
120
1M
R995
0.1
C921
C923
0.1
C924
0.1
C925
18p
C926
18p
C927
18p
470
R998
470
R997
470
R999
S[1]
S[2]
S[3]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]
S[10]
S[1
1]
S[12]
S[13]
S[14]
S[15]
S[16]
S[17]
S[18]
S[19]
S[20]
S[21]
S[22]
S[23]
S[24]
S[25]
S[26]
S[27]
S[28]
S[29]
S[30]
S[31]
S[32]
S[33]
COM[4]
COM[3]
COM[2]
COM[1]
S[3]
COM[4]
COM[3]
COM[2]
COM[1]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]
S[10]
S[1
1]
S[12]
S[13]
S[14]
S[15]
S[16]
S[17]
S[18]
S[2]
S[1]
S[26]
S[27]
S[28]
S[29]
S[30]
S[31]
S[32]
S[33]
S[25]
S[24]
S[23]
S[22]
S[19]
S[20]
S[21]
DATA
CE
CLK
DATA
CLK
CE
S909
6
PAUSE
S910
5
S911
SHUF
4
S912
S913
S914
S915
S916
PTY
(AEP, RU, UK)
S901
S902
S903
S904
S905
SEEK–
EQ3
S906
MODE
S907
SEEK–
EQ3
MODE
5
IC902
REMOTE CONTROL
IC903
KEY BOARD
LIQUID CRYSTAL DISPLAY PANEL
ROTARY ENCODER
DRIVER
LIQUID CRYSTAL DISPLAY
AUX
OFF
SOURCE
OFF
SOURCE
PTY
AF/TA
SEEK+
SEEK+
ALBUM
1
ALBUM
2
ALBUM
2
1
ALBUM
SCRL
DSPL
SHUF
4
3
PAUSE
6
SCRL
DSPL
RECEIVER
PUSH ENTER/
MENU
(VOLUME)
R931
180 (GT274MP/GT277ME)
680 (GT270MP/GT320MP)
820 (GT270MP/GT320MP)
220 (GT274MP/GT277ME)
R932, 936
680 (GT270MP/GT320MP)
220 (GT274MP/GT277ME)
R935
1k (GT270MP/GT320MP: E, EA, MX, KR)
330 (GT274MP/GT277ME)
R933, 937, 942, 944, 946, 956
1.5k (GT320MP: AR)
1.5k (GT320MP: AR)
1.2k (GT270MP/GT320MP: E, EA, MX, KR)
R934, 938
330 (GT274MP/GT277ME)
1.2k (GT270MP/GT320MP)
270 (GT274MP/GT277ME)
R939
1.5k (GT320MP: AR)
1.2k (GT270MP/GT320MP: E, EA, MX, KR)
270 (GT274MP/GT277ME)
R940, 941
1.8k (GT320MP: AR)
330 (GT274MP/GT277ME)
R943, 945, 947, 949
1.2k (GT270MP/GT320MP: E, EA, MX, KR)
LED931 -947
SML-D12V8WT86TN (GT270MP/GT320MP: E, EA, MX, KR)
SML-D12D8WT86TQ (GT320MP: AR)
SML-D12P8WT86TK (GT274MP/GT277ME)
6
15
1
C
12
13
5
F
16
8
2
B
D
G
11
10
E
9
A
4
3
7
14
LED DRIVE
LED DRIVE
(LCD BACK LIGHT)
(ILLUMINATION)
(ILLUMINATION)
3
PTY
PTY
AF/TA
US, CND, E, EA,
MX, AR, KR
AEP,
RU, UK
AR, KR
E, EA, MX,
US, CND,
(Page 23)
Ver. 1.1
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