HCD-GT111/GT222/GT444/GT555
– DISPLAY Board –
IC1101 NJU3427FH2
52
51 50 49 48
RESET
SERIAL
CIRCUIT
BUFFER
NC
1
INSTRUCTION
RD0
2
ADDRESS
DISPLAY
COUNTER
DATA RAM
RD1
3
RD2
4
RD3
5
SEGMENT
RD4
6
DATA LATCH
RD5
7
RD6
8
RD7
9
RD8
10
RD9
11
RD10
12
RD11
13
14
15 16 17 18 19 20
– MOTOR DRIVE Board –
IC001 LB1846M
VCC 1
IN4
2
3
IN3
CONTROL
MOTOR
LOGIC
IN1
4
IN2 5
THERMAL SHUTDOWN CIRCUIT
56
47
46 45
44
43
42
41
OSC
TIMING
DUTY
DECODER
COUNTER
COUNTER
TIMING
DECODER
TIMING/SEGMENT SELECTOR
HIGH VOLTAGE DRIVER
21 22 23 24 25 26
10
OUT4
9
OUT3
DRIVE
8
OUT1
7
OUT2
6
GND
40
39
NC
38
DR35
37
DR34
36
DR33
35
DR32
34
DR31
33
DR30
32
DR29
31
DR28
30
DR27
DR26
29
DR25
28
27
DR24