Sony CDX-GT272 Service Manual ▷ View online
CDX-GT272
CDX-GT272
25
25
R901
R902
R903
R904
R905
R906
R907
R908
R910
R909
R911
R912
R913
R986
R981
R982
CN901
R985
R984
R932
R933
R931
R947
R948
R952
R963
R964
R943
R944
R949
R950
R951
R946
R945
R975
R974
R941
R942
IC971
R961
R962
R977
R979
R978
R988
R992
C901
R921
R922
S904
LSW902(1/2)
LSW901(1/2)
S903
S902
S901
LSW903(1/2)
LSW904(1/2)
LSW905(1/2)
LSW906(1/2)
LSW907(1/2)
LSW908(1/2)
LSW909(1/2)
LSW910(1/2)
C971
C987
C984
C981
C986
R987
C983
LSW910(2/2)
LSW909(2/2)
LSW907(2/2)
LSW908(2/2)
LSW905(2/2)
LSW906(2/2)
LSW904(2/2)
LSW903(2/2)
LSW901(2/2)
LSW902(2/2)
Q931
LCD901
IC901
J901
R934
D998
LED931
LED942
LED941
LED951
LED953
LED952
LED954
D982
D903
FB901
FB902
FB903
FB902
FB903
D90
1
D902
D991
D992
D993
D994
RE901
D981
C988
FB904
Q932
5-9. SCHEMATIC DIAGRAM – KEY Section –
(Page 23)
CDX-GT272
CDX-GT272
26
26
• IC Block Diagrams
IC750 TDA8588BJ/N2/R1 (MAIN Board (1/4))
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
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
B.UP+B
SDA
SCL
VP2
PGND3
SVR
IN–FL
IN–FR
BEEP
PGND2
VP1
STB
PGND1
RST
CRES
AUDIO+8.3V
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
IC401 BD3442FS-E2 (MAIN Board (1/4))
CDX-GT272
27
• IC Pin Function Description
MAIN BOARD IC501 MB90F045PF-G-9073-SPE1 (SYSTEM CONTROL)
MAIN BOARD IC501 MB90F045PF-G-9073-SPE1 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
AREASEL0
I
Destination function setting pin 0
2
AREASEL1
I
Destination function setting pin 1
3
AREASEL2
I
Destination function setting pin 2
4
AREASEL3
I
Destination function setting pin 3
5
BEEP
O
BEEP signal output to power amplifi er
6
CYRIL_SEL
I
Cyril correspondence discrimination signal input “L”: No correspondence
7
NOSE_SW
I
Front panel attachment detect signal input “L”: Panel on, “H”: Panel off
8
DIAG
I
Status signal input from power amplifi er
9
VOLATT
O
Electronic volume attenuate control signal output
10
NCO
O
Not used. (Open)
11
VSS
—
Ground pin
12
TUATT
O
Tuner mute control signal output
13
NSMASK
O
Noise mask signal output Not used in this set. (Open)
14
NCO
O
Not used in this set. (Open)
15
NCO
O
Not used in this set. (Open)
16 to 22
NCO
O
Not used. (Open)
23
VCC5
—
Power supply pin (+3.3V)
24
EEP_SIO
I/O
EEPROM bus serial data signal input/output
25
EEP_CKO
O
EEPROM bus serial clock signal output
26
AMPSTB
O
Stand-by signal output to power requlation
27
LCD_CE
O
Chip enable signal output to LCD driver
28
LCD_SO
O
Serial data signal output to LCD driver
29
LCD_CKO
O
Serial clock signal output to LCD driver
30
RDS ON
O
RDS (radio data system) ON signal output Not used in this set. (Open)
31
RE-IN0
I
Rotary encoder signal input 0
32
RE-IN1
I
Rotary encoder signal input 1
33
I2C_CKO
O
I2C bus serial clock signal output
34
I2C_SIO
I/O
I2C bus serial data signal input/output
35
DAVDD
—
A/D converter power supply pin (+3.3V)
36
AVRH
—
A/D converter external reference power supply pin (+3.3V)
37
DAVSS
—
A/D converter Ground pin
38
QUALITY
I
Noise detect signal input
39
VSM
I
S-meter voltage detect signal input
40
KEYIN1
I
Key signal input 1
41
KEYIN0
I
Key signal input 0
42
VSS
—
Ground pin
43
RC_IN0
I
Rotary commander key signal input Not used in this set. (Pull up)
44 to 48
NCO
O
Not used. (Open)
49
MD0
I
Operation mode setting pin 0 (Pull up)
50
MD1
I
Operation mode setting pin 1 (Pull up)
51
MD2
I
Operation mode setting pin 2 (Pull down)
52
KEYACK
I
Key acknowledgment detect signal input
53
TU_ATTIN
I
Tuner mute zero cross detect signal input Not used in this set. (Pull down)
54
BUIN
I
Back-up power supply detect signal input
55
NCO
O
Not used. (Open)
56
DAVN
I
RDS data block synchronized detect signal input Not used in this set. (Pull down)
57
NCO
O
Not used. (Open)
58
UNISI
I
S-BUS data signal input
59
UNISO
O
S-BUS data signal output
60
UNISCK
O
S-BUS clock signal output
61
CODEC-SEL
I
MP3 select signal input “H”: MP3, “L”: Non-MP3
62
ILLUMI SEL
I
Illumination voltage setting signal input “H”: 10.4 V, “L”: 9.0 V
63
NCO
O
Not used. (Open)
64
SIRCS
I
Remote control signal input
CDX-GT272
28
Pin No.
Pin Name
I/O
Description
65 to 67
NCO
O
Not used. (Open)
68
FLASH_W
I
Memory mode select signal input
Normally “H” input: Single chip mode, after reset “L”: Flash write mode
Normally “H” input: Single chip mode, after reset “L”: Flash write mode
69, 70
NCO
O
Not used. (Open)
71
RC_IN1
I
Rotary commander shift key signal input Not used in this set. (Pull up)
72
ACC_IN
I
Accessory power supply detect signal input
73
TESTIN
I
Test mode detect signal input Not used in this set. (Pull up)
74
TELATT
I
Telephone attenuate detect signal input Not used in this set. (Pull down)
75
NCO
O
Not used. (Open)
76
AD_ON
O
A/D converter power supply control signal output
77
RESET
I
System reset signal input
78
NCO
O
Not used. (Open)
79
XOUT
O
Low speed operation clock signal output (32.768 kHz)
80
XIN
I
Low speed operation clock signal input (32.768 kHz)
81
VSS1
—
Ground pin
82
OSCIN
I
High speed operation clock signal input (18.432 MHz)
83
OSCOUT
O
High speed operation clock signal output (18.432 MHz)
84
VCC3
—
Power supply pin (+3.3 V)
85
DEMOSEL
I
DEMO select signal input “H”: DEMO on, “L”: DEMO off
86
ATT
O
Audio mute control signal output
87
BUSON
O
BUS ON signal output
88
SYSRST
O
System reset signal output
89 to 92
NCO
O
Not used. (Open)
93
Z-MUTE
I
CD zero cross mute detect signal input
94
B OUT SEL
I
Black out with/without discrimination select signal input “H”: Black out
95
INI RS
I
REAR/SUB initial setting signal input “H”: REAR initial, “L”: SUB initial
96
MO DISP
I
Motion display signal input
“H”: Motion display initial value on, “L”: Motion display initial value off
“H”: Motion display initial value on, “L”: Motion display initial value off
97
DIM_SEL
I
Dimmer select signal input “H”: No dimmer, “L”: Dimmer
98
CD_ON
I
CD mechanism servo power supply control request signal input
99
CDM_ON
I
CD mechanism deck power supply control request signal input
100
COL_SW
I
Illumination color select signal input
“H”: Two colors selection/initial slave, amber, “L”: Color/slave, amber
“H”: Two colors selection/initial slave, amber, “L”: Color/slave, amber
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