Sony CDX-GT373A Service Manual ▷ View online
CDX-GT373A
25
• IC Block Diagrams
IC300 TDA8588AJ/N2/R1 (MAIN Board (1/3))
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
CDX-GT373A
26
IC270 XC81CN1502NR (MAIN Board (3/3))
IC201 NJM062V(TE2) (MAIN Board (3/3))
IC401 BD3442FS-E2 (MAIN Board (2/3))
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
1
OUT A
2
IN A-
3
IN A+
8 V+
7 OUT B
6 IN B-
4
V-
5 IN B+
A
1
VOUT
4
3 NC
VSS
2
VIN
VREF
CDX-GT373A
27
• IC Pin Function Description
MAIN BOARD IC501 MB90F045PF-G-9074-SPE1 (SYSTEM CONTROL)
MAIN BOARD IC501 MB90F045PF-G-9074-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
NCO
O
Not used. (Open)
7
DIAG
I
Status signal input from power amplifi er
8
AMPSTB
O
Stand-by signal output to power requlation
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
ILLUMI SEL
I
Illumination voltage setting signal input “H”: 10.4 V, “L”: 9.0 V
17
DIM_SEL
I
Dimmer select signal input “H”: No dimmer, “L”: Dimmer
18 to 20
NCO
O
Not used. (Open)
21
COL_SEL
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
22
B OUT SEL
I
Black out with/without discrimination select signal input “H”: Black out
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
RDS ON
O
RDS (radio data system) ON signal output Not used in this set. (Open)
27
LCD_CE
O
Chip enable signal output to LCD driver
28
LCD_SO
O
Serial data signal output to LCD driver
29
LCD_SCK
O
Serial clock signal output to LCD driver
30
NCO
O
Not used. (Open)
31
RE-IN0
I
Rotary encoder signal input 0
32
RE-IN1
I
Rotary encoder signal input 1
33
I2C_SCK
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, 45
NCO
O
Not used. (Open)
46
LED_RED
O
Security-LED (Red) operation signal output
47
SECURITY_LED
I
Security detect signal input
48
AD_ON
O
A/D converter power supply control signal output
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)
CDX-GT373A
28
Pin No.
Pin Name
I/O
Description
57
LED_YELLOW
O
Security-LED (Yellow) operation signal output
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
Z-MUTE
I
CD zero cross mute detect signal input
62
NOSE_SW
I
Front panel attachment detect signal input “L”: Panel on, “H”: Panel off
63
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
64
SIRCS
I
Remote control signal input
65 to 67
NCO
O
Not used. (Open)
68
SENS1
O
Security level setting signal output 1
69
SENS2
O
Security level setting signal output 2
70
SENS3
O
Security level setting signal output 3
71
RC_IN1
I
Rotary commander shift key signal input Not used in this set. (Pull up)
72 to 76
NCO
O
Not used. (Open)
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
CYRIL_SEL
I
Cyril correspondence discrimination signal input “L”: No correspondence
86
DEMOSEL
I
DEMO select signal input “H”: DEMO on, “L”: DEMO off
87
NCO
O
Not used. (Open)
88
SYSRST
O
System reset signal output
89, 90
NCO
O
Not used. (Open)
91
CD_ON
I
CD mechanism servo power supply control request signal input
92
CDM_ON
I
CD mechanism deck power supply control request signal input
93 to 95
NCO
O
Not used. (Open)
96
BUSON
O
BUS ON signal output
97
TESTIN
I
Test mode detect signal input Not used in this set. (Pull up)
98
TELATT
I
Telephone attenuate detect signal input Not used in this set. (Pull down)
99
ACC_IN
I
Accessory power supply detect signal input
100
ATT
O
Audio mute control signal output
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