Star Micronics NX-1020 Technical Manual page 21

1. Block Diagram .....................................................................................................19
2. Main Logic Board ................................................................................................ 20
2-1. Data Input Operation.............................................................................................
2-1-1. Parallel Interface ...............................................................................................
2-1-2. Serial Interface ..................................................................................................
2-2. General Flow Chart ...............................................................................................
2-2-1. Editing ................................................................................................................
2-2-2. Print Head Driving Circuit.................................................................................
2-2-3. Print Head Temperature Detection Circuit .....................................................
2-2-4. Carriage Motor Driving Circuit ........................................................................
2-2-5. Carriage Motor Speed Control ........................................................................
2-2-6. Paper Feed Motor Driving Circuit ...................................................................
2-3. Reset Circuit ..........................................................................................................
2-4. Reset by +5V Line Voltage Detection .................................................................
2-5. Protection Circuit ..................................................................................................
3. Power Supply Unit .............................................................................................. 31
4. Mechanisms ......................................................................................................... 33
4-1. Print Head Mechanism ..........................................................................................
4-2. Print Head Carrying Mechanism .........................................................................
4-3. Ink Ribbon Feed Mechanism ................................................................................
4-4. Paper Feed Mechanism ........................................................................................
4-5. Detectors ...............................................................................................................
CHAPTER 2
THEORY OF OPERATION
1
2
3
20
20
4
21
24
5
25
25
25
6
26
27
7
27
29
30
30
33
33
34
35
36