Block Diagram - Touch Section - Sony HCD-LF1H Service Manual

Q Q
6-4. BLOCK DIAGRAM — TOUCH SECTION —
3 7 6 3 1 5 1 5 0
TP751 - TP755
SOFT-TOUCH BUTTONS
TP755
+ (VOLUME)
TP754
- (VOLUME)
TP753
FUNCTION
T E
L 1 3 9 4 2 2 9 6 5 1 3
TP752
TP751
IC751(1/3)
OSC
1
2
4
3
w w w
HCD-LF1H
11
9
3
5
11
9
3
5
11
9
x a o
y
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8
IC755(1/2)
IC756(1/2)
INVERTER
D FLIP FLOP
11 CLKB
10
12
8 DATAB
IC756(2/2)
D FLIP FLOP
CLKA
4 3
DATAA
6 2
IC753(1/2)
IC754(1/2)
INVERTER
D FLIP FLOP
11
10 CLKB
8 12 DATAB
IC754(2/2)
Q Q
3 7 6 3
D FLIP FLOP
3 CLKA
4
2 DATAA
6
IC751(2/3)
IC752
INVERTER
D FLIP FLOP
11 CLKB
10
8 12 DATAB
u 1 6 3
.
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2 4
9 9 8
IC755(2/2)
INVERTER
QB 12
8 13
6
QA 1 2
IC753(2/2)
INVERTER
8 12
QB 13
1 5 1 5 0 8 9 2 4
QA 6 2
1
IC751(3/3)
INVERTER
8 12
QB 13
m
c o
HCD-LF1H
2
9 9
KEY-5
KEY-4
D
KEY-3
MAIN
SECTION
(Page 29)
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KEY-1
KEY0