Intermec EasyCoder 501 - Keyboard Interface Board; Circuit Diagram

Intermec EasyCoder 501 – Service Manual Ed. 7
20
Chapter 2 Front and Keyboard
2.6 Keyboard Interface Board;
Circuit Diagram
Keyboard Interface Board 1-040701-26; Circuit Diagram
C4C1C2
IC1
+5V20
GND19
PA0
16ROW04C3
VDISP18
PA1
15ROW13
ECLK17
PA2
14ROW22
RESET
35RESET16
PA3
R8
13ROW31
RD
5RD15
PA4
12ROW440
WR
36WR14
PA5
11ROW539
CS
6CS825513
PA6
10ROW638
A1
8GND12
PA7
9ROW737
A0
9GND11
8COL0
PB0
18A610
7COL1
PB1
19A59
6COL2
PB2AD0
2034DB08
5COL3
PB3AD1
2133DB17
4COL4
PB4AD2
2232DB26
3COL5
PB5AD3
2331DB35
2COL6
PB6AD4
2430DB44
1SHIFT
PB7AD5
2529DB53
P3
AD6
A574HC0428DB62
PC0
14
AD7
27DB71
2345678910PC1
15
1
P1
1213
PC2
16
IC2F
PC3
74HC0417
1RN174HC04
PC4
READY13
1
PC5
65ERROR12
1
+5V1011
PC6
LED1LED2LED3IC2CRS11
IC2E
PC7
74HC04RW10
74HC04
82C55
POWERERRORREADY
1
43
1
89
R3 R1
IC2B
IC2D
74HC04
1
21
R2
IC2A
14DB7
13DB6
12DB5
11DB4
10DB3
9DB2
8DB1
7DB0
3VDISP
6ECLK
4RS
2345678910
5RW
R6 R5 R4
2
1
1RN2
2
P2 R7
1
P4
+5V
+5V
+5V