CAS ED Series, Service Manual

Page: 17 / 29

ED
Service Manual
17 04/12/10
3.2.2. DISPLAY & MODULE
MODE
S2
SAMPLE
Power_con
S12
S12
P0.1
LCD_WR
Bat_chk
S3
S6
S7
ON/OFF
P2.0
S0 S15
S1
C0
TXD
Rx
S23
PRINT
S11
S20
S2
ZERO
ONE_MODULE
OneModule
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
A_Vcc
A_GND
Bat_chk
P1.6
P1,7
Rx
Tx
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P2.0
P2.1
P2.2
P2.3
P1.1
AIN+
AIN-
A_GND
P1.0
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
PSEN
I2C_SDA
I2C_CLK
D_Vcc
D_GND
RTC_Power
C2
P0.2
Power_chk
TARE
S1
SAMPLE
TARE
ED(MODULE Ver.)
P1.1
S15
S17
S5
S6
S14
S9
S14
C3
U4
HT1621b
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
CS
RD
WR
DATA
VSS
OSCO
OSCI
VLCD
VDD
IRQ
BZ
BZ
COM0
COM1
COM2
COM3 SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
D_Vcc
+5V
CN2
1
2
3
4
5
6
7
8
9
10
S19
S4
One Module
C3
I2C_SDA
LCD_DATA
R3 100
S16
P1.6
P0.0
R6
10K
LCD_CS
HOLD
S5
P3.7
C1
0.1uF
A_GND
S13
LCD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
R1 100
S10
S19
ZERO
R4
10K
D_GND
S18
S21
R5
10K
S23
C2
RXD
KEY
CONNECTION
S20
Tx
S22
S0
A_GND
BL_con
PSEN
A_Vcc
P3.2
RTC_Power
S4
LCD_WR
PRINT
SET
S18
<Doc> <Rev Code>
<Title>
A4
1 3 Monday , March 26, 2007
Title
Size Document Number Rev
Date: Sheet of
S9
R2 100
I2C_CLK
S22
S17
C1
S11
CAL_SW
P3.5
S8
LCD_DATA
S21
AIN-
SET
P1.7
AIN+
S3
P1.0
P3.3
LCD_CS
S10
P2.3
HOLD
R8 10
S8
S13
C1
S7
R7
2.2K
Display PART
S16
C0
+5V
P3.4
MODE
BUZZER
P3.6