Sony CDX-GT929U / CDX-GT970US Service Manual ▷ View online
CDX-GT929U/GT970US
41
Pin No.
Pin Name
I/O
Description
54
TEST IN
I
Test mode detect signal input Not used in this set. (Open)
55
RC IN1
I
Rotary commander shift key signal input
56
SYSRESET
O
System reset signal output
57
BUS ON
O
Bus on signal output
58
FSW OUT
O
D/D converter oscillator frequency change signal output
59
B OUT SEL
I
Black out setting signal input “H”: Black out
60
VCC2
—
Power supply pin (+3.3 V)
61
NC
O
Not used. (Open)
62
VSS
—
Ground pin
63
MOTOR ON
O
Front panel motor drive power supply switch signal output
64
MOT+
O
Front panel open/close control signal output (Motor open)
65
MOT–
O
Front panel open/close control signal output (Motor close)
66
CLOSE SW
I
Front panel close detect signal input
67
OPEN SW
I
Front panel open detect signal input
68
P SNSR
I
Drive mechanism gear rotary information signal input
69
USB ON
O
USB power supply oscillator on/off signal output
70
DST SEL1
I
Destination setting pin 1
71
DST SEL2
I
Destination setting pin 2
72
FL ON
O
Fluorescent indicator tube power supply on/off signal output
73
BU IN
I
Backup power supply detect signal input
74
FLD ON
O
Fluorescent indicator tube driver power supply on/off signal output
75
HS EN
O
USB high side switch control signal output
76
HS OC
I
USB high side switch overcurrent detection signal input
77
RE 1
I
Rotary encoder signal input 1
78
RE 0
I
Rotary encoder signal input 0
79
FP IDET
I
Front panel overcurrent detection signal input
80
TEMP TR
I
Temperature detect signal input
81
NC
O
Not used. (Open)
82
QUALITY
I
Tuner noise detect signal input
83
VSM
I
S meter voltage signal input
84
KEY IN0
I
Key signal input 0
85
SP IN
I
Spectrum analyzer signal input from electronic volume
86
RC IN0
I
Rotary commander signal input 0
87
KEY ACK2
I
Rotary commander acknowledge signal input
88
KEY ACK0
I
Key acknowledge signal input
89
NC
O
Not used. (Open)
90
DISP RESET
O
Reset signal output to display IC
91
NOSE SW
I
Front panel detect signal input
92
NC
O
Not used. (Open)
93
DISP CE
O
Chip enable signal output for display IC
94
AVSS
—
Ground pin
95
DOOR IND
O
Sub panel LED power supply control signal output
96
VREF
—
Reference voltage pin for A/D converter
97
AVCC
—
Power supply pin (+3.3 V)
98
DISP SI RX
I
Communication signal input from display IC
99
DISP SO TX
O
Communication signal output to display IC
100
DISP CKO
O
Communication clock signal output to display IC
CDX-GT929U/GT970US
42
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-GT929U/GT970US
43
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
44
CDX-GT929U/GT970US
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
1-831-837-11 CORD (WITH CONNECTOR) (ISO) (POWER)
(GT929U)
5
1-833-972-11 CONNECTION
CORD
FOR
AUTOMOBILE
(POWER)
(GT970US)
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.
• 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.
"
"
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-101I-188//Q
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