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CHAPTER 4
PARTS REPLACEMENT
This chapter explains disassembly and reassembly of the printer. Note the following regarding disassembly
and reassembly.
1. Disconnect the printer from the wall outlet before servicing it.
2. Assy is the reverse of disassembly unless otherwise specified.
3. After reassembly, coat the screw heads with locking sealant.
4. Lubrication information is not provided in this chapter. Refer to section 2 in chapter 5.
1. Front Case Unit....................................................................................................35
2. Rear Case Unit.....................................................................................................35
3. Ribbon Holder......................................................................................................36
4. Printer Mechanism ..............................................................................................36
5. Main Logic Board Unit ........................................................................................37
6. Power Supply Unit...............................................................................................37
7. Print Head ............................................................................................................38
8. Fuse ......................................................................................................................39
9. Tractor Unit ..........................................................................................................39
10. Carriage Motor Assy ...........................................................................................40
11. Carriage Unit ........................................................................................................40
12. Paper Feed Roller A ............................................................................................41
13. Frame Holder .......................................................................................................41
14. Paper Guide Assy................................................................................................42
15. Platen Assembly..................................................................................................42
16. Paper Feed Motor Assy ......................................................................................43
17. Paper Path Change Plate ....................................................................................43
18. Detector ................................................................................................................44
4
- DOT MATRIX PRINTER 1
- INTRODUCTION 3
- CHAPTER 1 5
- GENERAL SPECIFICATIONS 5
- 1. General Specifications 7
- Weight 16.1lbs/7.3kg 8
- Fig. 1-4 Front cover removed 10
- 3. Control Panel 11
- 3-2. EDS Mode Settings 12
- 4. Parallel Interface 13
- 5 Serial Interface (optional) 14
- 5-3. DIP Switch Settings 15
- 6. EE-PROM mode 16
- 6-3. EE-PROM MP 17
- 6-4. Rewriting the EE-PROM 20
- CHAPTER 2 21
- THEORY OF OPERATION 21
- 2. Main Logic Board 24
- 3. Power Supply Circuit 25
- 4. Mechanism 26
- Gear of The Clutch Lever 28
- Idler Gear 28
- Cassette Gear 28
- 4-4. Paper Feed Mechanism 29
- 4-5. Detectors 30
- CHAPTER 3 33
- ADJUSTMENTS 33
- CHAPTER 4 37
- PARTS REPLACEMENT 37
- 1. Front Case Unit 39
- 2. Rear Case Unit 39
- 3. Ribbon Holder 40
- 4. Printer Mechanism 40
- 5. Main Logic Board Unit 41
- 6. Power Supply Unit 41
- 7. Print Head 42
- 9. Tractor Unit 43
- 10. Carriage Motor Assy 44
- 11. Carriage Unit 44
- 12. Paper Feed Roller Assy 45
- 13. Frame Holder 45
- 14. Paper Guide Assy 46
- 15. Platen Assy 46
- 16. Paper Feed Motor Assy 47
- 17. Paper Path Change Plate 47
- 18. Detector 48
- CHAPTER 5 49
- MAINTENANCE AND LUBRICATION 49
- 1-1. Cleaning 51
- 1-2. Checks 51
- 2. Lubrication 52
- CHAPTER 6 57
- TROUBLESHOOTING 57
- 1. Troubleshooting Procedures 59
- 3. Repair by Unit Replacement 61
- CHAPTER 7 73
- PARTS LIST 73
- 1. Printer Assembly 74
- 1-2. Parts List 75
- 2. Printer Mechanism 76
- 2-2. Parts List 77
- Printer Mechanism 78
- 3. Sub - Assembly 79
- 3-2. Front Case Unit 80
- 3-4. Tractor Unit 82
- 3-5. Carriage Unit 83
- 3-6. Frame Base Assy 84
- 3-7. Frame L Unit 85
- 3-8. Frame R Unit 86
- 4. Wiring Scheme of Printer 87
- 5. Electrical Parts 88
- 5-1-2. Component Layout 90
- 5-1-3. Parts List 92
- Main Logic Board 92
- 5-2. Control Panel Board 95
- 5-3. Connected Board 96
- 5-4. Power Supply Unit 97
- 5-4-2. Component Layout 98
- 5-4-3. Parts List 99
- 6-1. Wiring Scheme 101
- 6-2. I/F Board 102
- 6-3. CPU Board 103
- 6-3-2. Component Layout 104
- 6-3-3. Parts List 104
- CPU Board 104
- 7. Waveform with Oscilloscope 105
- Driving Signal Driving Signal 106
- Distributed by 108
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