Sony CDX-GT440U / CDX-GT444U / CDX-GT447UE Service Manual ▷ View online
CDX-GT440U/GT444U/GT447UE
25
IC503 NJM2387ADL3(TE2) (MAIN Board (2/3))
IC001 TEF6617T/V1/S470,518 (CDX-GT440U: US/GT447UE) (MAIN Board (3/3))
IC001 TEF6617T/V1/S470/M5,518 (CDX-GT440U: AEP, UK, RU/GT444U) (MAIN Board (3/3))
IC001 TEF6617T/V1/S470/M5,518 (CDX-GT440U: AEP, UK, RU/GT444U) (MAIN Board (3/3))
1
2
3
4
5
CURRENT
LIMIT
THERMAL
PROTECTION
OVERVOLTAGE
PROTECTION
BAND GAP
REFERENCE
VIN
CONT
VOUT
VADJ
GND
AMRFIN 1
AMRFDEC 2
FMIN2 3
FMIN1 4
LOUT 8
ROUT 9
MPXOUT 13
RSSI 14
XTAL2 15
XTAL1 16
GNDAUD 10
GNDRF 5
VCC2 6
AMRFAGC 7
AMIFAGC2 11
MPXIN 12
AMSELOUT2
32
AMSELOUT1
31
AMIFAGC1
30
AMSELIN2
29
PLL
25
VCODEC
24
VREF
20
SDA
19
SCL
18
GNDD
17
GND
23
AMSELIN1
28
DAV N
27
PLLREF
26
VCC1
22
VREGSUP
21
AM
TUNER
FM
TUNER
OUTPUT
PLL
TUNING
SYSTEM
I2C BUS
POWER
SUPPLY
STEREO DECODER
HIGH CUT
SOFT MUTE
NOISE BLANKER
SIGNAL
IMPROVEMENT
CONTROL
BANDWIDTH
CONTROL
RDS
DEMODULATOR
AND
DECODER
CDX-GT440U/GT444U/GT447UE
26
IC302 BD3447AFV-E2 (MAIN Board (3/3))
21
22
29
30
23
24
40
FIL
GND
I2C_SIO
I2C_SCK
OUT_FLCH
OUT_FRCH
OUT-RLCH
OUT-RRCH
OUT_SLCH
OUT_SRCH
SA_OUT
SA_DA
MIN1
MIN2
EBIAS
DS2_R
DS1_R
DS3_R
SA_CLK
39
38
37
VCC(8.5V)
36
27
28
25
26
31
32
33
34
35
20
19
12
11
18
17
1
BUS_LCH
BUS_RCH
TU_LCH
TU_RCH
CD_RCH
AUX_LCH
AUX_GND
AUX_RCH
PD_R
PD_G
PD_L
FP1
FN2
FP2
EBIAS
DS2_L
DS1_L
DS3_L
FN1
2
3
4
CD_LCH
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
°/0°
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-GT440U/GT444U/GT447UE
27
• IC Pin Function Description
MAIN BOARD (2/3) IC401 MB90F882PF-G-111E1 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
CYRIL_SEL
I
Cyril select signal input (L: No cyril select (CDX-GT440U/GT444U), H: Cyril select (CDX-
GT447UE))
GT447UE))
2
B-OUT_SEL
I
Black out setting select signal input (L: No black out)
3
COL SW_SEL
I
Key illumination initial color setting select signal input (H: Blue)
4
ILLUMI_SEL
I
Key illumination voltage setting select signal input (H: 10.4 V)
5, 6
NCO
O
Not used. (Open)
7
NOSE_SW
I
Front panel detach/attach detect signal input (L: with front panel, H: without front panel)
8 to 10
NCO
O
Not used. (Open)
11
RE_IN0
I
Rotary encoder signal input 0
12
RE_IN1
I
Rotary encoder signal input 1
13
X_OUT
O
Low speed operation clock signal output (32.768 kHz)
14
X_IN
I
Low speed operation clock signal input (32.768 kHz)
15
VCC
―
Power supply pin (+3.3 V)
16
VSS
―
Ground
17
C
―
Regulator reference capacitor connecting pin
18
UNISI
I
SONY-BUS data input (Fixed at L in this set)
19
UNISO
O
Not used. (Open)
20
UNISCK
O
Not used. (Open)
21
USB_ON
O
USB over current detect IC control signal output
22
I2C_SIO
I/O
IIC serial data input/output
23
I2C_SCK
O
IIC serial clock signal output
24
USB_OVER
I
USB over current detect signal input
25
BUS_ON
O
BUS ON signal output (Fixed at H in this set)
26
SYS_RST
O
System reset signal output
27
CD_ON
I
CD mechanism servo power supply control request signal input
28
CDM_ON
I
CD mechanism deck power supply control request signal input
29
ACC_IN
I
Accessory power supply detect signal input
30
TEL_ATT
I
Telephone attenuator detect signal input (AEP, UK, Russian model)
31
ATT
O
Audio mute control signal output
32
AVCC
―
A/D converter power supply pin (+3.3 V)
33
AVRH
―
A/D converter external reference power supply pin (+3.3 V)
34
RC_IN1
I
Rotary commander shift key signal input 1
35
AVSS
―
Ground for A/D converter
36
QUALITY
I
Not used. (Open)
37
VSM
I
S meter voltage detect signal input
38
SA_IN
I
Spectrum analyzer DC input
39
KEY_IN1
I
Key signal input 1
40
KEY_IN0
I
Key signal input 0
41
RC_IN0
I
Rotary commander shift key signal input 0
42, 43
NCO
O
Not used. (Open)
44
VSS
―
Ground
45
KEY_ACK0
I
Key acknowledge detect signal input (Rotary commander)
46
KEY_ACK1
I
Key acknowledge detect signal input (Front panel)
47
EXTATT_XEN
O
L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the status
of other source)
of other source)
48
LCD_CE
O
LCD driver chip enable signal output
49
LCD_SO
O
LCD driver serial data output
50
LCD_SCK
O
LCD driver serial clock signal output
51
MOD2
I
Micon operation mode setting signal input (active: L)
52
MOD1
I
Micon operation mode setting signal input (Fixed at H in this set)
53
MOD0
I
Micon operation mode setting signal input (active: H)
54
RESET
I
Reset signal input
55
AREA_SEL2
I
Destination setting pin 2 (L: CDX-GT440U/GT444U, H: CDX-GT447UE)
56
AREA_SEL1
I
Destination setting pin 1 (L: CDX-GT440U: AEP, UK, Russian model/GT444U, H: CDX-
GT440U: US model/GT447UE)
GT440U: US model/GT447UE)
57
AREA_SEL0
I
Destination setting pin 0 (L: US model, H: AEP, UK, Russian model)
58
WAKE_UP
O
CD mechanism deck micon wake up signal output
CDX-GT440U/GT444U/GT447UE
28
Pin No.
Pin Name
I/O
Description
59
MC_RX
I
MC-BUS communication and CD mechanism deck micon communication RX input
60
MC_TX
O
MC-BUS communication and CD mechanism deck micon communication TX output
61
CLK_IN
I
Flash programming serial clock signal input
62
Z_MUTE
I
Z mute signal input
63
NCO
O
Not used. (Open)
64
TEST
O
Not used. (Open)
65
VCC
―
Power supply pin (+3.3 V)
66
VSS
―
Ground
67
NCO
O
Not used. (Open)
68
AMP_STB
O
Standby signal output for power regulator IC
69
DIAG
I
Condition signal input from power amp IC
70
VBUS_ON
I
VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)
71
SA_OUT
O
Spectrum analyzer serial data output
72
SA_CLK
O
Spectrum analyzer serial clock signal output
73
NCO
O
Not used. (Open)
74
TU_ATT
O
Not used. (Open)
75
NSMASK
O
Not used. (Open)
76
RDS_ON
O
Not used. (Open)
77
FLASH_EN0
I
Flash writer programming wake up signal input (Fixed at L)
78
FLASH_EN1
I
Flash writer programming wake up signal input
79 to 81
NCO
O
Not used. (Open)
82
TU_ATTIN
O
Not used. (Open)
83
BU_CHECK
I
Back up power supply detect signal input
84
EQ TYPE_SEL
I
Equalizer type setting signal input (L: general model)
85 to 89
NCO
O
Not used. (Open)
90
VCC
―
Power supply pin (+3.3 V)
91
VSS
―
Ground
92
OSC_OUT
O
High speed operation clock signal output (7.92 MHz)
93
OSC_IN
I
High speed operation clock signal input (7.92 MHz)
94
NCO
O
Not used. (Open)
95
SIRCS
I
Remote control signal input
96
NCO
O
Not used. (Open)
97
BEEP
O
Beep signal output for power amplifi er IC
98
ZAPPIN
O
Zappin beep signal output
99
SYNC_OUT
O
DC-DC converter oscillation frequency control signal output
100
DD_ON
O
DC-DC converter power supply ON/OFF control signal output
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