Sony CDX-GT420U / CDX-GT424U / CDX-GT427UE / CDX-GT470U / CDX-GT470US Service Manual ▷ View online
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
33
IC803 TPS40200DRG4 (MAIN Board (3/3))
IC804 TPS2051BDRG4 (MAIN Board (3/3))
IC805 TC7WH123FU(TE12R) (MAIN Board (3/3))
1
2
RC
GND
DRV
ISNS
VDD
SS
3
COMP
4
FB
SOFT-START
AND
OVERCURRENT
700mV
ENABLE E/A
E/A AND SS
REFFERENCE
REFFERENCE
7
8
6
5
UVLO
OSC
PWM
LOGIC
DRIVER
1
2
GND
OC
IN
CHARGE
PUMP
3
IN
4
EN
DRIVER
CURRENT
LIMIT
THERMAL
SENCE
UVLO
CS
8
7
7
5
6
OUT
OUT
OUT
OUT
8
VCC
7
RX/CX
6
CX
5
Q
1
A
2
B
3
CLR
4
GND
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
34
• IC Pin Function Description
MAIN BOARD IC501 M3062LFGP-050FP (SYSTEM CONTROL) (EXCEPT GT427UE)
MAIN BOARD IC501 M3062LFGP-053FP (SYSTEM CONTROL) (GT427UE)
MAIN BOARD IC501 M3062LFGP-050FP (SYSTEM CONTROL) (EXCEPT GT427UE)
MAIN BOARD IC501 M3062LFGP-053FP (SYSTEM CONTROL) (GT427UE)
Pin No.
Pin Name
I/O
Description
1
LCD DATA
O
Liquid crystal display panel serial data signal output
2
LCD CLK
O
Liquid crystal display panel serial clock signal output
3
NCO
O
Not used. (Open)
4
SIRCS
I
Remote control signal input
5 to 7
NCO
O
Not used. (Open)
8
NCO (BYTE)
I
Connect to ground. (Pull down)
9
CNVSS
I
Flash write signal input Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed operation clock signal input (32.768kHz)
11
XOUT
O
Low speed operation clock signal output (32.768kHz)
12
RESET
I
Reset signal input
13
OSCOUT
O
High speed operation clock signal output (11.06MHz)
14
VSS
—
Ground pin
15
OSCIN
I
High speed operation clock signal input (11.06MHz)
16
VCC1
—
Power supply pin (+3.3V)
17
NMI
I
External pull up pin (fi xed at “H”.)
18
DAVN
I
RDS data block cycle detection signal input
19
BUIN
I
Back up power supply detection signal input
20
CDM ON
I
CD mechanism deck power supply control request signal input
21
NCO
O
Not used. (Open)
22
Z MUTE
I
Mute signal input
23
VBUSON
I
VBUS power supply control signal input “H”: VBUS on, “L”: VBUS off
24
NOSE SW
I
Front panel attachment detection signal input
25
USB OVER
I
USB over current detection signal input
26
BEEP
O
Beep signal output to power amplifi er
27
USB ON
O
USB over current detection IC control signal output
28
SYNC OUT
O
DC/DC converter oscillation frequency control signal output
29
I2C SCK
O
I2C serial clock signal output
30
I2C SIO
I/O
I2C serial data signal input/output
31
MT TXD
O
Flash write interface serial data signal output
32
MT RXD
I
Flash write interface serial data signal input
33, 34
NCO
O
Not used. (Open)
35
MC TX
O
MC-BUS communication and mechanism IC communication TX output
36
MC RX
I
MC-BUS communication and mechanism IC communication RX input
37 to 39
NCO
O
Not used. (Open)
40
DD ON
O
DC/DC converter power supply on/off control signal output
41
NCO
O
Not used. (Open)
42
SYSRST
O
System reset signal output
43
RCIN1
I
Rotary commander shift key signal input
44
WAKE UP
O
Mechanism IC wake up signal output
45 to 50
NCO
O
Not used. (Open)
51
CD ON
I
CD mechanism servo power supply control request signal input
52
NCO
O
Not used. (Open)
53
NCO
O
Not used. (Open)
54
TEL ATT
I
Telephone attenuate detection signal input
55
ACC IN
I
Accessory power supply detection signal input
56
ATT
O
Audio mute control signal output
57
DIAG
I
Condition signal input from power amplifi er IC
58
AMPSTB
O
Standby signal output to power regulator IC
59
VOLATT
O
Electrical volume attenuate control signal output
60, 61
NCO
O
Not used. (Open)
62
VCC2
—
Power supply pin (+3.3V)
63
COL SEL
I
Key illumination two colors change setting signal input “L”: two colors
64
VSS
—
Ground pin
Ver. 1.1
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
35
Pin No.
Pin Name
I/O
Description
65
ILLUMI SEL
I
Illumination voltage setting signal input for panel “H”: 10.4V, “L”: 9V
66 to 68
NCO
O
Not used. (Open)
69
B OUTSEL
I
Black out setting signal input “H”: Block out
70
AREASEL 2
I
Destination setting pin 2
71
AREASEL 1
I
Destination setting pin 1
72
AREASEL 0
I
Destination setting pin 0
73, 74
NCO
O
Not used. (Open)
75
TUATTIN
I
Tuner mute zero cross detection signal input
76 to 80
NCO
O
Not used. (Open)
81
RE IN1
I
Rotary encoder signal input 1
82
RE IN0
I
Rotary encoder signal input 0
83
SA IN
I
Spectrum analyzer signal input
84
CYRIL SEL
I
Cyril select signal input “H”: Cyril select
85
NSMASK
O
Noise mask signal output
86
TUATT
O
Tuner mute control signal output
87
RDS ON
O
RDS IC power supply control signal output
88
QUALITY
I
Noise detection signal input
89
SADATA
O
Spectrum analyzer data signal output
90
SACLK
O
Spectrum analyzer clock signal output
91
KEYACK0
I
Key Acknowledge detection signal input (Rotary command signal input)
92
KEYACK1
I
Key Acknowledge detection signal input (Front panel signal input)
93
VSM
I
S meter voltage detection signal input
94
KEYIN1
I
Key signal input 1
95
KEYIN0
I
Key signal input 0
96
DAVSS
—
Ground pin for A/D converter
97
RCIN0
I
Rotary commander key signal input
98
AVRH
—
A/D converter external reference power supply pin (+3.3V)
99
DAVDD
—
A/D converter power supply pin (+3.3V)
100
LCD CE
O
Liquid crystal display panel chip enable signal output
36
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
SECTION 6
EXPLODED VIEWS
1
X-2179-750-1 PANEL
ASSY,
SUB
2
3-042-244-11 SCREW
(T)
3
X-2179-399-1 LOCK
ASSY
(S)
4
2-050-124-01 SCREW +BTT 2.6X5
5
A-1363-643-A MAIN BOARD, COMPLETE
(GT420U:AEP,UK,RU/GT424U)
5
A-1366-526-A MAIN BOARD, COMPLETE
(GT470U:E,IND/GT470US)
5
A-1367-679-A MAIN BOARD, COMPLETE (GT427UE)
5
A-1367-703-A MAIN BOARD, COMPLETE (GT420U:US)
5
A-1368-026-A MAIN BOARD, COMPLETE (GT470U:EA)
6
2-021-848-01 SHEET (TU), GROUND
7
1-831-838-11 CORD (WITH CONNECTOR) (ISO) (POWER)
(AEP,UK,RU)
7
1-833-762-11 CONNECTION
CORD
FOR
AUTOMOBILE
(POWER) (for Maruti Suzuki:Gasoline Car)
7
1-833-974-11 CONNECTION
CORD
FOR
AUTOMOBILE
(POWER)
(EXCEPT
AEP,UK,RU)
7
1-834-307-11 CONNECTION
CORD
FOR
AUTOMOBILE
(POWER) (for Maruti Suzuki:Diesel Car)
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
TU1
A-3220-960-B TUNER UNIT (TUX-032)
(GT470U/GT470US)
TU1
A-3220-961-B TUNER UNIT (TUX-032)
(GT420U/GT424U/GT427UE)
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-685-790-01 SCREW +PTT 2.6X4 (S)
#3
7-685-793-09 SCREW +PTT 2.6X8 (S)
#4
7-685-794-09 SCREW +PTT 2.6X10 (S)
#5
7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT
#6
7-621-284-40 SCREW +P 2.6X10
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice.
vice.
Some delay should be anticipated when
ordering these items.
• Abbreviation
EA :
EA :
Saudi
Arabian
model
IND
: Indian model
MX
: Mexican model
RU
: Russian model
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
R
R
Parts Color Cabinet’s Color
• Accessories are given in the last of the
electrical parts list.
6-1. MAIN SECTION
The components identifi ed by mark
0
or dotted line with mark
0 are critical for
safety.
Replace only with part number specifi ed.
Replace only with part number specifi ed.
not supplied
not supplied
F901
not supplied
TU1
not supplied
not supplied
#1
#1
#1
#3
#4
#4
#6
#5
#3
#2
#1
MG-101I-188//Q
"
"
#
#
1
2
3
4
7
6
"
5
not supplied
Ver. 1.1
Click on the first or last page to see other CDX-GT420U / CDX-GT424U / CDX-GT427UE / CDX-GT470U / CDX-GT470US service manuals if exist.