Denon AVR-2106 Service Manual page 21

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LC74781 (IC1006)
V SS1 1
Xtal IN 2
Xtal OUT 3
CTRL1 4
BLANK 5
OSC IN 6
OSC OUT 7
CHARA 8
CS 9
SCLK 10
SIN 11
V DD2 12
TE
L 13942296513
CS 9
SIN
11
SCLK 10
RST 23
VDD1
24
VSS1
1
VDD2
12
CHARA
8
OSCIN
6
OSCOUT
7
SYNIN 17
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SEPC 18
SEPOUT 19
SEPIN 20
.
CTRL3 22
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24 V DD1
23 RST
22 CTRL3
21 CTRL2
20 SEP IN
19 SEP OUT
18 SEP C
17 SYN IN
16 V DD1
15 CV IN
14 NC
13 CV OUT
8-bits
Serial
latch
+
parallel
command
converter
decoder
Horizontal
character
size
register
Horizontal
size
counter
Horizontal
character
size
Horizontal
register
character
size
register
Timing generator
Horizontal
Horizontal
character
character
size
size
x ao u163
register
register y
i
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2 9
8
LC74781 Trminal Function
Pin No. Symbol
1 VSS1 GND
2 Xtal IN Xtal oscillation
3 Xtal OUT Xtal oscillation
4 CTRL1 Xtal oscillation input switching
5 BLANK Blank output
6 OSC IN LC oscillation
7 OSC OUT LC oscillation
8 CHARA Character output
9 CS Enable input
10 SCLK Clock input
11 SIN Data input
12 VDD2 Power
13 CV OUT VIDEO signal output
14 NC
15 CV IN VIDEO signal input
16 VDD1 Power
17 SYN IN Sync. separate circuit input
18 SEP C Sync. separate circuit bias voltage
19 SEP OUT Complex sync. signal output
20 SEP IN Vertical sync. signal input
21 CTRL2 NTSC/PAL-M switching input
22 CTRL3 SEP IN input control
23 RST Reset input
Q Q
24 VDD1 Power (+5V)
3 6 7 1 3
Vertical Horizontal Vertical
character display display and inversion
size position position
register register register
Vertical Horizontal Vertical
and inversion
size dot dot
counter counter counter
Blinking Blinking
and inversion and inversion
control control
register register
Character Line
control control
counter counter
Synchronization
signal generator
.
4 21 2 3
CTRL1 CTRL2 XtalIN XtalOUT
21
AVR-2106/886
9 4 2 8
Name
1 5 0 5 8 2 9 9 4
RAM
Blinking
Display
write
control
adress
control
register
counter
register
Blinking
Display
control
circuit
Decoder
Font
RAM
Character output control
Shift
Background control
m register
Video output control
co
5 15 13
BLANK CVIN CVOUT
9 9
2 8 9 9
RAM