Sony CDX-GT740UI / CDX-GT747UI / CDX-GT790UI Service Manual ▷ View online
CDX-GT740UI/GT747UI/GT790UI
33
IC801 TPS40200DRG4 (MAIN Board (3/4))
IC802 TPS2051BDRG4 (MAIN Board (3/4))
IC852 NJM2377M(TE2) (MAIN Board (3/4))
8
7
5
6
VREF
OSC
0.52V
30A
L.O
PWM
ER.AMP
S.C.P
U.VLO
IN
F.B
GND
OUT
REF
CT
CS
VCC
1
2
4
3
1
2
RC
GND
DRV
ISNS
VCC
SS
3
COMP
4
FB
SOFT-START
AND
OVERCURRENT
700mV
ENABLE E/A
E/A AND SS
REFERENCE
REFERENCE
7
8
6
5
UVLO
OSC
PWM
LOGIC
DRIVER
1
2
GND
OC
IN
CHARGE
PUMP
3
IN
4
EN
DRIVER
CURRENT
LIMIT
THERMAL
SENSE
UVLO
CS
8
7
7
5
6
OUT
OUT
OUT
OUT
OUT
CDX-GT740UI/GT747UI/GT790UI
34
IC351 NJM2387ADL3(TE2) (MAIN Board (4/4))
IC650 TK11133CSCL-G (MAIN Board (4/4))
IC904 SN74LVC2G66DCUR (KEY Board)
3
1
1Y
1Z
2E
GND
VCC
1E
2Z
2Y
4
2
5
7
6
8
1
2
3
4
5
CURRENT
LIMIT
THERMAL
PROTECTION
OVERVOLTAGE
PROTECTION
BANDGAP
REFERENCE
VIN
CONT
VOUT
VADJ
GND
1
2
3
5
4
CO
N
T
GND
NO
VIN
VOUT
OVER HEAT &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
CONTROL
CIRCUIT
CDX-GT740UI/GT747UI/GT790UI
35
• IC Pin Function Descriptions
MAIN BOARD (3/4) IC501 MB90F883AHPMC-GE1-425C (SYSTEM CONTROL)
MAIN BOARD (3/4) IC501 MB90F883AHPMC-GE1-425C (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
NOSE_SW
I
Front panel detach detect signal input
2
FL_ON
O
FL power supply control signal output (L: power ON)
3
DOOR_SW
I
Front panel open detect signal input
4
DOOR_IND
O
Door indicator control signal output
5
FSW_IN
I
DC-DC converter oscillation frequency count signal input
6
ILL_SEL
I
Key illumination voltage setting signal input (L: 10.4 V)
7
I2C_SIO
I/O
I2C bus serial data input/output
8
I2C_CLK
O
I2C bus serial clock signal output
9
RE_IN0
I
Rotary encoder signal input 0
10
RE_IN1
I
Rotary encoder signal input 1
11
X_IN
I
Low speed operation clock signal input (32.768 kHz)
12
X_OUT
O
Low speed operation clock signal output (32.768 kHz)
13
VCC5
—
Power supply pin (+3.3 V)
14
VSS
—
Ground
15
C
—
Regulator reference capacitor connecting pin
16
UNI_SI
I
SONY-BUS data input
17
UNI_SO
O
SONY-BUS data output
18
UNI_SCK
O
SONY-BUS clock signal output
19
BTU_RX
I
Not used. (Fixed at L in this set)
20
NCO
O
Not used. (Open)
21
ILL_VOL
I
Key illumination voltage select signal input (L: illumination color green/red, H: illumination
color blue or demo/screen saver)
color blue or demo/screen saver)
22
FLD_ON
O
FL driver power supply ON/OFF control signal output
23
ACC_IN
I
Accessory power supply detect signal input
24
TEL_ATT
I
Telephone attenuator detect signal input
25
ATT
O
Audio mute control signal output
26
BUS_ON
O
BUS ON signal output
27
SYSRST
O
System reset signal output
28
CD_ON
I
CD mechanism servo power supply control request signal input
29
CDM_ON
I
CD mechanism deck power supply control request signal input
30
DAVDD
—
A/D converter power supply pin (+3.3 V)
31
AVRH
—
A/D converter external reference power supply pin (+3.3 V)
32
RC_IN1
I
Rotary commander shift key signal input 1
33
DAVSS
—
Ground for A/D converter
34
MD_AUDIO_SEL
O
CD mechanism deck audio select signal output (L: CD/USB source)
35
VSM
I
S meter voltage detect signal input
36
SA_IN
I
Electronic volume spectrum analyzer DC input
37
NCO
O
Not used. (Open)
38
KEY_IN0
I
Key signal input 0
39
RC_IN0
I
Rotary commander shift key signal input 0
40
DSPL_IF
O
Display micon communication start-up signal output
41
DSPL_RESET
O
Display micon reset signal output
42
VSS
—
Ground
43
KEY_ACK0
I
Key acknowledge detect signal input (Rotary commander)
44
KEY_ACK1
I
Key acknowledge detect signal input (Front panel)
45
FSW_OUT
O
DC-DC converter oscillation frequency select signal output
46
DSPL_RX
I
Display micon communication RX input
47
DSPL_TX
O
Display micon communication TX output
48
NCO
O
Not used. (Open)
49
MOD0
I
Micon operation mode setting signal input (at the fl ash writing: H)
50
MOD1
I
Micon operation mode setting signal input
51
MOD2
I
Micon operation mode setting signal input (at the fl ash writing: L)
52
RESET
I
Micon reset signal input
53
MC_RX
I
MC-BUS communication and CD mechanism deck micon communication RX input
CDX-GT740UI/GT747UI/GT790UI
36
Pin No.
Pin Name
I/O
Description
54
MC_TX
O
MC-BUS communication and CD mechanism deck micon communication TX output
55
NCO
O
Not used. (Open)
56
WAKE_UP
O
CD mechanism deck micon wake-up signal output
57
FLS_TX
I
Flash writer data input
58
FLS_RX
O
Flash writer data output
59
FLS_CLK
O
Flash writer clock signal output
60
Z_MUTE
I
Z mute signal input
61
ILL_IN
I
Key illumination detect signal input
62
NCO
O
Not used. (Open)
63
VCC3
—
Power supply pin (+3.3 V)
64
VSS1
—
Ground
65
NCO
O
Not used. (Open)
66
AMP_STB
O
Standby signal output for power regulator IC
67
DIAG
I
Condition signal input from power amp IC
68
EJECT_OK
O
Eject OK signal output
69
SA_OUT
O
Electronic volume spectrum analyzer serial data output
70
SA_CLK
O
Electronic volume spectrum analyzer serial clock signal output
71
NCO
O
Not used. (Open)
72
TUATT
O
Not used. (Open)
73
NCO
O
Not used. (Open)
74
RDS_ON
O
RDS IC power supply control signal output (AEP, UK, RU model)
75
FLASH_EN0
I
Flash writer programming start-up signal input (Fixed at L in this set)
76
FLASH_EN1
I
Flash writer programming start-up signal input
77
USB_ON
O
USB over current detect IC control signal output
78
DD_ON
O
DC-DC converter power supply ON/OFF control signal output
79
BT_SEL
I
BT corresponding discrimination port (L: no BT)
80
BT_MIC_DETECT
I
Not used. (Fixed at L in this set)
81
BUIN
I
Back up power supply detect signal input
82
DAVN
I
RDS data block sync detect signal input (AEP, UK, RU model)
83
AREA_SEL2
I
Destination setting pin 2 (L: except RU model, H: E, RU model)
84
AREA_SEL1
I
Destination setting pin 1 (L: except US, RU model, H: US, RU model)
85
AREA_SEL0
I
Destination setting pin 0 (L: US, E, model, H: AEP, UK, RU model)
86
VBUS_ON
I
VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)
87
USB_OVER
I
USB over current detect signal input
88
VCC3
—
Power supply pin (+3.3 V)
89
VSS1
—
Ground
90
OSC_OUT
O
High speed operation clock signal output (7.92 MHz)
91
OSC_IN
I
High speed operation clock signal input (7.92 MHz)
92
NCO
O
Not used. (Open)
93
BT_ACTIVE
I
Not used. (Fixed at L in this set)
94
NCO
O
Not used. (Open)
95
BEEP
O
Beep signal output for power amplifi er IC
96
ZAPPIN_BEEP
O
Zappin beep signal output
97, 98
NCO
O
Not used. (Open)
99
CYRIL_SEL
I
Cyril select signal input (L: No cyril select, H: cyril select)
100
B-OUT_SEL
I
Black out setting signal input (L: No black out, H: black out)
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