Sony HCD-GX255 / HCD-RG170 / HCD-RG470 / MHC-GX255 / MHC-RG170 / MHC-RG470 Service Manual ▷ View online
73
HCD-GX255/RG170/RG470
Pin No.
Pin Name
I/O
Description
91
O-BIAS
O
REC bias on/off control signal output terminal
92
I-TAPE-AMS
I
Auto music sensor detection signal input from the electrical volume
"L": music is present, "H": music is not present
"L": music is present, "H": music is not present
93
I-STREAM
I
Audio signal input for stream LED (A/D input)
94
I-VACS
I
VACS signal input terminal (A/D input)
95
I-PROTECTOR
I
Protector operating detection signal input terminal
96
AVSS
-
Ground terminal
97
I-POWER,
DISPLAY
I
Front panel key input terminal (A/D input)
98
VREF
I
Reference voltage input terminal
99
AVCC
-
Power supply terminal (+3.3V)
100
NC
O
Not used
74
HCD-GX255/RG170/RG470
CD-G BOARD IC1001 TC9411AFG (BS, K) (CD GRAPHICS DECODER)
Pin No.
Pin Name
I/O
Description
1
SESUB
I
Not used
2
CLCK
O
Serial data transfer clock signal output to the CD DSP
3
DATA
I
Serial data input from the CD DSP
4
SBSY
I
Subcode Q sync (SCOR) input from the CD DSP
5
SFSY
I
WFCK signal input from the CD DSP
6
MUTE
I
Muting control signal input from the system controller
7
VDD1
-
Power supply terminal (+5V)
8
VSS1
-
Ground terminal
9
MCE
I
Chip enable signal input terminal Not used
10
MCDO
O
Serial data output terminal Not used
11
MCDI
I
Serial data input terminal Not used
12
MCCK
I
Serial data transfer clock signal input terminal Not used
13
WE
O
Write enable signal output to the D-RAM
14
RAS
O
Row address strobe signal output to the D-RAM
15 to 22
VA0 to VA7
O
Address signal output to the D-RAM
23
VSS2
-
Ground terminal
24
VDD2
-
Power supply terminal (+5V)
25
VD0
I/O
Two-way data bus with the D-RAM
26
CAS
O
Column address strobe signal output to the D-RAM
27
VD1
I/O
Two-way data bus with the D-RAM
28
OE
O
Data read strobe signal output to the D-RAM
29, 30
VD2, VD3
I/O
Two-way data bus with the D-RAM
31
BLANKIN
I
Blank signal input terminal Not used
32
BIN
I
RGB (B) signal input terminal Not used
33
GIN
I
RGB (G) signal input terminal Not used
34
RIN
I
RGB (R) signal input terminal Not used
35
HSYNC
O
Horizontal synchronize signal output terminal Not used
36
VSYNC
O
Vertical synchronize signal output terminal Not used
37
CDET
O
CD-G detection signal output terminal
38
VON
I
Video on control signal input terminal Not used
39, 40
TEST1, TEST2
I
Test mode setting terminal
41
LINESW
I
Line switch input terminal Not used
42
VREF
I
Reference voltage input terminal
43
AVDD
-
Power supply terminal (+5V)
44
VDOUT
O
Video signal output terminal
45
AVSS
-
Ground terminal
46, 47
BIAS1, BIAS2
I
For bias setting terminal
48
VSS3
-
Ground terminal
49
VDD3
-
Power supply terminal (+5V)
50
QNG
O
Not used
51
PNG
O
Not used
52
DEN
I
NTSC/PAL switching control signal input terminal
53
FSC
O
Not used
54
RESET
I
System reset signal input from the system controller
55
SENTSC
I
Mode setting terminal
56
PDOWN
I
Mode setting terminal
75
HCD-GX255/RG170/RG470
Pin No.
Pin Name
I/O
Description
57
XI2
I
System clock input terminal (17.734475 MHz) (for PAL) Not used
58
XO2
O
System clock output terminal (17.734475 MHz) (for PAL) Not used
59
XI1
I
System clock input terminal (14.31818 MHz) (for NTSC)
60
XO1
O
System clock output terminal (14.31818 MHz) (for NTSC)
76
HCD-GX255/RG170/RG470
PANEL BOARD IC701
µ
PD780232GC-508-8BT-A (FL/LED DRIVER)
Pin No.
Pin Name
I/O
Description
1
VDD1
-
Power supply terminal (+3.3V)
2
VSS1
-
Ground terminal
3
X1
I
System clock input terminal (4.19 MHz)
4
X2
O
System clock output terminal (4.19 MHz)
5
IC
I
Not used
6
RESET
I
System reset signal input from the system controller "L": reset
7
SCK1
I
Serial data transfer clock signal input from the system controller
8
SI1
O
Serial data output to the system controller
9
SO1
I
Serial data input from the system controller
10 to 15
NC
I
Not used
16
CE
I
Chip select signal input from the system controller
17
NC
I
Not used
18
AVSS
-
Ground terminal
19 to 22
KEY1 to KEY4
I
Front panel key input terminal (A/D input)
23
VSS0
-
Ground terminal
24
AVDD
-
Power supply terminal (+5V)
25
VDD0
-
Power supply terminal (+5V)
26 to 31
STREAM LED1 to
STREAM LED6
O
LED drive signal output terminal
32
SW LED
O
LED drive signal output terminal Not used
33 to 44
NC
I
Not used
45 to 58
S1 to S14
O
Segment drive signal output to the fluorescent indicator tube
59
VDD2
-
Power supply terminal (+5V)
60
VLOD
-
Power supply terminal (for fluorescent indicator tube drive)
61 to 67
S15 to S21
O
Segment drive signal output to the fluorescent indicator tube
68 to 80
G1 to G13
O
Grid drive signal output to the fluorescent indicator tube
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