Intermec EasyCoder 501 – Service Manual Ed. 7
142
Chapter 17 CPU Board
17.6:10 Sensor Interfaces
AD0-AD15,A5-A6
CLK/4
R623
PAPER LOW
P602
1
2
3
4
2
4
1
3
C615
R637
LM339M
6
7
1
IC600A
R628
R635
4
5
2
IC600B
R639
HEADLIFT
TRESH
R646
R645
3
Q603
1
+5V
C602
R605
TRESH
LM339M
8
9
14
IC600D
R608
8
5
R643
IC606
6
3
2
1
LM567CM
74HC02M
9
10
R620
8
IC17C
Q600
R614
+5V
R636
C613
C614
2
C616
GND
3
4
2
1
P606
3
WR602
1
LSS Upper
LTS
RIB–END
AD–LSS
LABEL
CLKPAP
+5V
GND
+5V
BEEP
AD8
AD9
AD10
AD11
AD12
11
10
9
7
6
5
NC
CLK0
D0
D1
D2
D3
D4
12
OUT0
13
GATE0
IC605
GND
15
NC
82C54M
OUT1
17
GATE1
18
CLK1
GATE2
OUT2
CLK2
A0
A1
CS
NC
19
20
21
22
23
24
25
CLKFILM
A5
A6
RD
RD
26
WR
WR
27
VCC
+5V
NC
1
D7
AD15
2
D6
AD14
3
D5
AD13
4
TONE DECODER
OUTPUT
TONE OUT
TIME CAP.
TONE IN
IN FILTER
OUT FILTER
GND
R644
R641
P607
2
+
C612
+
R633
R632
Q602
1
+5V
8
5
R630
IC604
6
3
2
1
LM567CM
+5V
R624
C606
C608
2
C610
GND
3
4
2
1
P603
3
WR601
1
TONE DECODER
OUTPUT
TONE OUT
TIME CAP.
TONE IN
IN FILTER
OUT FILTER
GND
R631
R629
P604
2
+
C607
+
3
4
2
1
P601
GND
3
Q601
2
1
1
GND
3
2
1
P600
LSS Lower
3
4
2
1
+5V
C605
GND
WR600
1
3
2
GND
R610
COMP
+
–
GND
+5V
R603
R619
R618
R617
R616
R615
R613
R612
RESET
WRSENS
74AC574M
11
CLK
1
OE
AD8
2
19
D
AD9
3
18
D
AD10 4
17
D
AD11 5
16
D
AD12 6
15
D
AD13 7
14
D
AD14 8
13
D
AD15 9
12
D
IC603
C604
GND
+5V
+5V
R627
R621
+5V
COMP
+
–
GND
GND
C609
BEEP
3
LM339M
COMP
+
–
GND
RIBBON LOW
P605
R640
R642
1
2
3
4
+5V
R638
CSTIMER
HEAD LIFT
P608
R647
GND
GND
+5V
+5V
R622
R626
R625
CLK/4
CSTIMER
WR
RD
R648
GND
C611
GND
R634
+5V
GND
C617 – C622
R649
C623
GND
8
+5V
R-END
LTS