Read Sharp ER-A880 (serv.man2) Service Manual online
(4-2) Input capacity
Signal
Input capacity
S
40 pF
TYP.
CP1, DISP
250 pF
TYP.
CP2
200 pF
TYP.
DU0
∼
DU3
200 pF
TYP.
DL0
∼
DL3
200 pF
TYP.
(4-3) Interface signal
•
LCD
Pin No.
Symbol
Content
Effective signal
level
1
S
Scan start signal
H
2
CP1
Input data latch signal
H
→
L
3
CP2
Data input clock signal
H
→
L
4
DISP
DISP control signal
Display on: H, off: L
5
V
DD
Logic circuit power (+5V)
—
6
V
SS
GND potential
—
7
V
EE
LCD drive power (–)
—
8
DU0
Display data signal
(Upper half screen)
(Upper half screen)
H (ON), L (OFF)
9
DU1
10
DU2
11
DU3
12
DL0
Display data signal
(Lower half screen)
(Lower half screen)
H (ON), L (OFF)
13
DL1
14
DL2
15
DL3
•
CCFT
Pin No.
Symbol
Content
Effective signal
level
1
GND
GND pin (From invertor)
—
2
NC
—
—
3
NC
—
—
4
HV
High voltage input pin
(From invertor)
(From invertor)
—
Fig. 1 Dot table of display
1dot
2dot
3dot
640dot
1dot
2dot
3dot
240dot
241dot
480dot
1
1
2
1
3
1
1
2
2
2
3
1
240
241
1
1
480
1
1
240
241
480
640
640
640
640
Vertical
Lateral
Note: "1.2" shows the first vertical and second lateral dot.
1
2
3
640
1dot
2dot
3dot
240dot
241dot
480dot
DU3 DU2 DU1 DU0 DU3 DU2 DU1 DU0
DU3 DU2 DU1 DU0 DU3 DU2 DU1 DU0
DU3 DU2 DU1 DU0
DU3 DU2 DU1 DU0
DL3 DL2 DL1 DL0
DL3 DL2 DL1 DL0
4
5
6
7
8
DU3 DU2 DU1 DU0
DU3 DU2 DU1 DU0
DL3 DL2 DL1 DL0
DL3 DL2 DL1 DL0
Vertical
Lateral
– 79 –
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