Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual ▷ View 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
CDX-GT270MP/GT274MP/GT277ME/GT320MP
CDX-GT270MP/GT274MP/GT277ME/GT320MP
26
26
• IC Block Diagrams
– MAIN Board –
IC301 TDF8556AJ/N5
IC401 BD3447AFV-E2
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOAD DUMP
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
SERVO+3.3V
MECHA+6V
VP
BU+B
I2C_SIO
I2C_SCK
VP2
P-GND1
SVR
IN-FL
IN-FR
BEEP
P-GND3
VP1
STB
P-GND4
RST
CRES
AUDIO+B
(8.5V)
(8.5V)
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
21
22
29
30
23
24
40
FIL
GND
SDA
SCL
OUT
-FR
OUT
-FL
OUT
-RR
OUT
-RL
SUB-R
SUB-L
SAOUT
SADA
MIN1
MIN2
EBIAS2
DS2-R
DS1-R
DS3-R
SACLK
39
38
37
VCC
36
27
28
25
26
31
32
33
34
35
20
19
12
11
18
17
1
BUS-R
BUS-L
TU-R
TU-L
CD-L
AUX-R
AUX-G
AUX-L
PD-R
PD-G
PD-L
FP1
FN2
FP2
EBIAS1
DS2-L
DS1-R
DS3-R
FN1
2
3
4
CD-R
5
14
13
16
15
10
9
8
7
6
I2C BUS
LOGIC,
VCO
FADER
FADER
FADER
HPF
LPF
GND
ISO AMP
GND
ISO AMP
180
q/0q
3 BAND P-EQ (TONE CONTROL)
7 BAND
SPECTRUM ANALYZER
/LEVEL METER
EFFECT
VOLUME/MUTE
INPUT GAIN
INPUT SELECTOR (3 SIGLE-END AND 3 STEREO IS O)
FADER
FADER
SPEANA
LVL METER
LVL METER
SPEANA
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
CDX-GT270MP/GT274MP/GT277ME/GT320MP
27
– KEY Board –
IC903 PT16511-LQ
IC402 MM1836A33NRE
VOUT
4
CONT 1
GND 2
NC 3
VIN
5
+
–
VOLTAGE
REFERENCE
REGULATOR
CURRENT
LIMIT
THERMAL
SHUTDOWN
BIAS
SEG1/GP1/PW1 1
SEG2/GP2/PW2 2
SEG3/GP3/PW3 3
SEG2/GP2/PW2 2
SEG3/GP3/PW3 3
SEG4/GP4 4
SEG5 5
SEG6 6
SEG7 7
SEG8 8
SEG9 9
SEG6 6
SEG7 7
SEG8 8
SEG9 9
SEG10 10
SEG11 11
SEG12 12
COM2
36
COM1
35
SEG34
34
SEG33
33
SEG32
32
SEG31
31
SEG30
30
SEG29
29
SEG28
28
SEG27
27
SEG26
26
SEG25
25
SEG13
13
SEG14
14
SEG15
15
SEG16
16
SEG17
17
SEG18
18
SEG19
19
SEG20
20
SEG21
21
SEG22
22
SEG23
23
SEG24
24
INHB
45
VLCD1
41
VDD
40
OSC
44
VSS
43
VLCD2
42
SEG35
39
COM4
38
COM3
37
CLOCK
GENERATOR
SEGMENT DRIVER
&
LATCH
COMMON
DRIVER
CS
46
SI
48
CLK
47
SHIFT
REGISTER
ADDRESS
DETECTOR
PWM
DRIVER
CDX-GT270MP/GT274MP/GT277ME/GT320MP
28
• IC Pin Function Description
MAIN BOARD IC501 R5F3650KCDZ99FA (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
LCD_SO
O
Serial data output to the liquid crystal display driver
2
LCD_CLK
O
Serial clock signal output to the liquid crystal display driver
3
NOSE_SW
I
Front panel remove/attach detection signal input terminal “L”: Front panel is attached
4
SIRCS
I
Remote control signal input from the remote control signal receiver
5 to 7
NCO
-
Not used
8
BYTE
I
External data bus width select signal input Fixed at “L” in this set
9
CNVSS
I
Flash write signal input terminal Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed system clock signal input terminal (32.768 kHz)
11
XOUT
O
Low speed system clock signal output terminal (32.768 kHz)
12
RESET
I
System reset signal input from the reset signal generator “L”: reset
13
OSCOUT
O
High speed system clock signal output terminal (7.92 MHz)
14
VSS
-
Ground terminal
15
OSCIN
I
High speed system clock signal input terminal (7.92 MHz)
16
VCC1
-
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt signal input terminal Fixed at “H” in this set
18
RC_IN1
I
Rotary remote commander shift key input terminal
19
BUIN
I
Back up power supply detection signal input terminal “L” is input at low voltage
20, 21
NCO
-
Not used
22
DEC_SI
I
Serial data input from the CD section
23
DEC_SCK
O
Serial data transfer clock signal output to the CD section
24
DEC_SO
O
Serial data output to the CD section
25, 26
NCO
-
Not used
27
DRV_ON
I
Power supply on/off control signal input terminal for the CD mechanism section
28
BEEP
O
Beep sound drive signal output to the power amplifi er
29
I2C_SCL
O
IIC serial clock signal output to the electrical volume and power amplifi er
30
I2C_SDA
I/O
IIC two-way serial data bus with the electrical volume and power amplifi er
31
FW_TXD
O
Flash writer data output terminal
32
FW_RXD
I
Flash writer data input terminal
33
FW_CLK
I
Flash writer clock signal output terminal
34
FW_BUSY
O
Flash writer busy signal output terminal
35 to 37
NCO
-
Not used
38
MEC_LOAD
O
Motor (Loading) signal output to the CD section
39
MEC_EJECT
O
Motor (Eject) signal output to the CD section
40
CDON_1500MV
O
CD servo power supply control signal output to the CD section
41
EPM
O
EPM signal output terminal Fixed at “L” in this set
42
MEC_INSW
I
Detection signal input from the CD section (in switch)
43
MEC_LIMIT
I
Detection signal input from the CD section (limit switch)
44
MEC_DSW
I
Detection signal input from the CD section (D switch)
45
DEC_INT
I
Request signal input from the CD section
46
CE
O
Chip enable signal output terminal Fixed at “H” in this set
47
HIT2_SDA
I/O
IIC two-way serial data bus with the FM/AM tuner unit
48
HIT2_SCL
O
IIC Serial data transfer clock signal output to the FM/AM tuner unit
49
HIT2_RESET
O
Reset signal output to the FM/AM tuner unit
50
DEC_XMUTE
O
Muting on/off control signal output to the CD section “L”: muting on
51
CD_ZDET
I
Zero detection signal input from the CD section
52
CD_XCCE
O
Chip enable signal output to the CD section
53
DEC_SSTBY
O
SRAM standby mode control signal output to the CD section
54
DEC_RST
O
Reset signal output to the CD section
55, 56
NCO
-
Not used
57
ACC_IN
I
Accessory power detection signal input terminal “L”: accessory power on
58
ATT
O
Muting on/off control signal output terminal “H”: muting on
59
DIAG
I
Diagnostic signal input from the power amplifi er
60
AMPSTB
O
Standby control signal output to the power amplifi er
61
NCO
-
Not used
62
VCC2
-
Power supply terminal (+3.3V)
63
NCO
-
Not used
64
VSS
-
Ground terminal
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