Sony CDX-GT720 / CDX-GT72W / CDX-GT770 Service Manual ▷ View online
CDX-GT72W/GT720/GT770
41
DISPLAY BOARD IC901 M30876FJBA03GP (DISPLAY CONTROL)
Pin No.
Pin Name
I/O
Description
1
SYS CE
I
Main chip enable signal input
2
NC
O
Not used. (Open)
3
FL DAT3
O
Fluorescent indicator tube serial data signal output 3
4
NC
O
Not used. (Open)
5
FL CLK IN
I
Fluorescent indicator tube serial clock signal input
6
BYTE
I
Connect to ground. (Fixed to “L”.)
7
CNVSS
I
Port for fl ash write H (write switch) Normally operation: “L”
8, 9
NC
O
Not used. (Open)
10
RESET
I
Reset signal input
11
XOUT
O
Main clock signal output (6.75 MHz)
12
VSS
—
Ground pin
13
XIN
I
Main clock signal input (6.75 MHz)
14
VCC1
—
Power supply pin (+3.3 V)
15
NMI
I
Non-maskable interruption signal input Fixed to “H” for external pull-up resistor.
16 to 18
NC
O
Not used. (Open)
19
GCP TA4 IN
I
Fluorescent indicator tube GCP TA4 signal input
20, 21
NC
O
Not used. (Open)
22
BK TA3 OUT
O
Fluorescent indicator tube BK TA3 signal output
23
NC
O
Not used. (Open)
24
LAT TA2 OUT
O
Fluorescent indicator tube latch TA2 signal output
25
NC
O
Not used. (Open)
26
BLINK
O
BLINK control signal output Normally operation: “H”
27
NC
O
Not used. (Open)
28
GCP TA0 OUT
O
Fluorescent indicator tube GCP TA0 signal output
29
SYS SO
O
Main serial data signal output
30
SYS SI
I
Main serial data signal input
31
SYS CLK
I
Main serial clock signal input
32
NC
O
Not used. (Open)
33
FL DAT1
O
Fluorescent indicator tube serial data signal output 1
34
NC
O
Not used. (Open)
35
FL CLK IN
I
Fluorescent indicator tube serial clock signal input
36 to 38
NC
O
Not used. (Open)
39
HOLD
I
External data bus (Hold) signal input Fixed to “L” for external pull-down resistor.
40 to 43
NC
O
Not used. (Open)
44
WRI/WR
I
External data bus (WRI/WR) signal input Fixed to “H” for external pull-up resistor.
45 to 59
NC
O
Not used. (Open)
60
VCC2
—
Power supply pin (+3.3 V)
61
NC
O
Not used. (Open)
62
VSS
—
Ground pin
63 to 70
NC
O
Not used. (Open)
71
PLUG IN
I
AUX plug detect signal input
72 to 77
NC
O
Not used. (Open)
78
KEY PUSH
I
Rotary encoder push key detect signal input
79 to 84
NC
O
Not used. (Open)
85
KEY 1
I
Key signal input 1
86
KEY 2
I
Key signal input 2
87, 88
NC
O
Not used. (Open)
89
SIRCS
I
SIRCS data signal input
90
ILL GREEN
O
Illumination (green) change control signal output
91
ILL BLUE
O
Illumination (blue) change control signal output
92
ILL RED
O
Illumination (red) change control signal output
93
NC
O
Not used. (Open)
CDX-GT72W/GT720/GT770
42
Pin No.
Pin Name
I/O
Description
94
AVSS
—
Ground pin
95
NC
O
Not used. (Open)
96
VREF
—
Reference voltage power supply pin (+3.3 V)
97
AVCC
—
Power supply pin (+3.3 V)
98
NC
O
Not used. (Open)
99
FL DAT2
O
Fluorescent indicator tube serial data signal output 2
100
FL CLK OUT
O
Fluorescent indicator tube serial clock signal output 2
43
CDX-GT72W/GT720/GT770
SECTION 6
EXPLODED VIEWS
1
3-265-290-11 SCREW (PANEL F)
2
X-2149-941-1 PANEL
ASSY,
SUB
3
3-042-244-11 SCREW
(T)
4
X-2187-988-1 PANEL
ASSY,
BASE
5
1-833-972-11 CONNECTION
CORD
FOR
AUTOMOBILE
(POWER)
6
3-264-798-01 CAP
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-685-790-01 SCREW +PTT 2.6X4 (S)
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
IND :
IND :
Indian
model
MX :
Mexican
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.
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
Les composants identifi és par une marque
0
0
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifi é.
le numéro spécifi é.
"
"
F901
#1
#1
#1
#1
not supplied
not supplied
not supplied
(SUB PANEL board)
(SUB PANEL board)
not supplied
(BASE PANEL board)
(BASE PANEL board)
not supplied
not supplied
not supplied
1
2
1
5
6
4
3
#2
MG-101FC-188//Q
44
CDX-GT72W/GT720/GT770
51
A-1441-047-A MAIN BOARD, COMPLETE (GT72W/GT720)
51
A-1441-049-A MAIN BOARD, COMPLETE (GT770)
52
1-872-512-11 FLEXIBLE
BOARD
53
A-1221-342-A DB-F07//CN
54
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
55
1-833-835-11 CONNECTION
CORD
FOR
AUTOMOBILE
(SUB OUT (MONO))
TUX501 A-3220-961-B TUNER UNIT (TUX-032)
#1
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#3
7-685-793-09 SCREW +PTT 2.6X8 (S)
#4
7-685-795-09 SCREW +PTT 2.6X12 (S)
#5
7-685-794-09 SCREW +PTT 2.6X10 (S)
#6
7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
6-2. MAIN BOARD SECTION
55
52
51
53
54
#1
#1
#3
#3
#4
#5
#5
#6
#6
#3
not supplied
not supplied
not supplied
TUX501
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