Sony STR-DB1070 Service Manual - Page 54

Video Board, Ic307, Mb90089f-g-238-bnd Osd Driver

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STR-DB870/DB1070 • VIDEO BOARD IC307 MB90089F-G-238-BND (OSD DRIVER) Pin No. 1 2 3 4 5 6 7 Pin Name YIN CIN VIN AVCC FSCO VBLK VCC I/O Description I Y (luminance) signal input from the Y switch (IC752) I C (color) signal input from the C switch (IC750) I Composite video signal input from the video select (IC308) - Power supply terminal (+5V) (for analog) O Internal color burst phase display signal output terminal Not used (open) O Vertical blanking timing signal output terminal Not used (open) - Power supply terminal (+5V) 8 EXS I External clock generator circuit for color burst (NTSC: 14.31818MHz, PAL: 17.734475MHz) 9 XS O Clock signal output terminal for color burst Not used (open) 10 HSYNC O Horizontal synchronizing signal output terminal (for test) 11 VSYNC O Vertical synchronizing signal output terminal (for test) 12 EXHSYN I External horizontal synchronizing signal input terminal Not used (open) 13 EXVSYN I External vertical synchronizing signal input terminal Not used (open) 14 VSS - Ground terminal 15 EXD I Dot clock generator connecting terminal for display 16 XD O Dot clock generator connecting terminal for display 17 VOB O Blanking signal output terminal Not used (open) 18 VOC2 O color signal output terminal Not used (open) 19 VOC1 O color signal output terminal Not used (open) 20 VOC0 O color signal output terminal Not used (open) 21 TEST I Test signal input terminal "L": test (normally: fixed at "H") 22 SCLK I Serial data transfer shift clock signal input terminal 23 SIN I Serial data input terminal 24 CS I Chip select signal input terminal "L": active 25 VOUT O Composite video signal output to the video buffer (IC305) 26 COUT O C (color) signal output to the video buffer (IC305) 27 YOUT O Y (luminance) signal output to the video buffer (IC305) 28 AVSS - Ground terminal (for analog) 54

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54
STR-DB870/DB1070
•
VIDEO BOARD
IC307
MB90089F-G-238-BND (OSD DRIVER)
Pin No.
Pin Name
I/O
Description
1
YIN
I
Y (luminance) signal input from the Y switch (IC752)
2
CIN
I
C (color) signal input from the C switch (IC750)
3
VIN
I
Composite video signal input from the video select (IC308)
4
AVCC
—
Power supply terminal (+5V) (for analog)
5
FSCO
O
Internal color burst phase display signal output terminal
Not used (open)
6
VBLK
O
Vertical blanking timing signal output terminal
Not used (open)
7
VCC
—
Power supply terminal (+5V)
8
EXS
I
External clock generator circuit for color burst
(NTSC: 14.31818MHz, PAL: 17.734475MHz)
9
XS
O
Clock signal output terminal for color burst
Not used (open)
10
HSYNC
O
Horizontal synchronizing signal output terminal (for test)
11
VSYNC
O
Vertical synchronizing signal output terminal (for test)
12
EXHSYN
I
External horizontal synchronizing signal input terminal
Not used (open)
13
EXVSYN
I
External vertical synchronizing signal input terminal
Not used (open)
14
VSS
—
Ground terminal
15
EXD
I
Dot clock generator connecting terminal for display
16
XD
O
Dot clock generator connecting terminal for display
17
VOB
O
Blanking signal output terminal
Not used (open)
18
VOC2
O
color signal output terminal
Not used (open)
19
VOC1
O
color signal output terminal
Not used (open)
20
VOC0
O
color signal output terminal
Not used (open)
21
TEST
I
Test signal input terminal
“L”: test (normally: fixed at “H”)
22
SCLK
I
Serial data transfer shift clock signal input terminal
23
SIN
I
Serial data input terminal
24
CS
I
Chip select signal input terminal
“L”: active
25
VOUT
O
Composite video signal output to the video buffer (IC305)
26
COUT
O
C (color)
signal output to the video buffer (IC305)
27
YOUT
O
Y (luminance) signal output to the video buffer (IC305)
28
AVSS
—
Ground terminal (for analog)