Canon BJC-50 Service Manual Page 130
- Page / 184
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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5. DETECTION FUNCTION
The printer uses HP sensor, paper end sensor, delivery sensor, inside temperature sensor,
and head temperature sensor. Also, the capacity of the waste ink absorber is stored in the
EEPROM. When the absorber is about to become full a warning is given and when full an
error will occur. The printer detects the level of the ink remaining in the ink cartridge by
counting the number of dots ejected, and indicates when the ink runs out. The ink
remaining detection function operates only when the setting for the BJ controller is ON.
5.1 HP Sensor
The photointerrupter type HP sensor detects the edge of the carriage in order to detect
the carriage position.
After the carriage senses the edge, it moves to the right, and the print head is capped at
its home position.
5.2 Paper End Sensor
The switch type paper end sensor detects the presence of paper.
5.3 Delivery Sensor
The switch-type sensor detects whether paper has been delivered.
5.4 Temperature Sensor
The temperature sensor on the control board detects the temperature inside the
printer. The ASIC detects a change in the thermistor resistance that changes along
with changes of the inside temperature. The ASIC converts the input analog value,
which is a voltage converted from the thermistor resister to a digital value with the
internal A/D converter. This value is used to control the pulse width of the head drive
control signal and temperature adjustment signal.
5.5 Head Temperature Sensor
The head temperature sensor in the print head detects the head temperature. The
ASIC detects the diode sensor that changes as a change in voltage along with changes
in the head temperature. The ASIC converts the input analog value to a digital value
with the internal A/D converter. When the head temperature rises excessively, the
digital value becomes large, which can stop ejecting the ink from the head.
Part 4: Technical Reference
BJC-50
4-44
HP Sensor
TH1
Delivery Sensor
Paper End Sensor
Figure 4-31 Sensor Location
- I. ABOUT THIS MANUAL 3
- II. TABLE OF CONTENTS 4
- Part 4: TECHNICAL REFERENCE 5
- Part 5: MAINTENANCE 6
- III. ILLUSTRATION INDEX 8
- IV. TABLE INDEX 10
- SAFETY AND 11
- PRECAUTIONS 11
- 1.2 Ink Stains 14
- 1.2.1 Ink path 14
- Figure 1-2 Ink Path 14
- Check Point 15
- Danger ! High Temperature! 16
- 2. MACHINE PRECAUTIONS 17
- 2.1.2 Automatically capping 18
- 2.1.4 Ink conductivity 18
- 2.2 Ink Cartridge 19
- 2.2.1 Ink cartridge handling 19
- 2.3.1 Initial precautions 20
- 2.3.2 Storage precaution 20
- 2.4 Printer Handling 21
- 2.4.2 Ink leakage precautions 22
- Figure 1-8 Capping Position 22
- 3. PRECAUTION FOR SERVICE 23
- Control PCB Ass'y 24
- Figure 1-10 Control Board 25
- Figure 1-12 IrDA Unit 26
- SPECIFICATIONS 27
- 1. PRODUCT OUTLINE 29
- 1.2 Features 30
- 1.2.1 Printer 30
- 1.3 BJ Cartridge 31
- Figure 2-6 Universal Adapter 34
- Figure 2-8 Interface Cable 35
- 2. SPECIFICATIONS 37
- 2.2 Paper Specifications 41
- Figure 2-10 Printing Area 42
- 2.3 Interface Specifications 43
- 2.3.1 Parallel interface 43
- 2.3.2 Infrared interface 48
- Figure 2-15 IrDA Method 48
- Figure 2-16 ASK Method 49
- 2.4 Character Code Tables 50
- Code page 437 50
- Code page 850 50
- Code page 860 51
- Code page 863 51
- Code page 865 52
- Code page 857 52
- Code page 855 53
- Code page 852 53
- Code page 864 54
- Code page 869 54
- OPERATING 55
- INSTRUCTIONS 55
- 1. PRINTER SETUP 57
- 1.2 Installation 58
- 1.2.1 Installation space 58
- Figure 3-2 Installation Space 58
- 1.2.2 Installation procedure 59
- CARTRIDGE 63
- 2. TRANSPORTING THE PRINTER 67
- 3.1 Error Indications 68
- Figure 3-12 Control Panel 68
- TABLE 3-1 ERROR DISPLAY 68
- 3.2 Function Setting 71
- 3.2.1 Default setting 71
- 3.3 Control Buttons 72
- 3.4 Self Test Print 73
- 3.4.1 Demonstration print 74
- 3.4.3 Ripple pattern print 76
- 3.4.5 All fonts pattern print 77
- 3.6 EEPROM Data Setting 79
- 3.6.2 Setting EEPROM data 79
- 3.6.3 Displaying EEPROM data 80
- 3.7 Rewriting Flash ROM 82
- 3.7.1 Flash ROM rewrite mode 82
- TECHNICAL 85
- REFERENCE 85
- 1. OVERVIEW 87
- 2. FIRMWARE 95
- Byte0 Byte1 97
- Part 4: Technical Reference 100
- 3. PRINTER MECHANISM 105
- 4. PRINTER ELECTRICAL SYSTEM 120
- 5. DETECTION FUNCTION 130
- 6. SCANNER CARTRIDGE 132
- MAINTENANCE 137
- 1. MAINTENANCE 139
- 2. SERVICE TOOLS 140
- 3. APPLYING THE GREASE 141
- 4. ADJUSTMENT 142
- 5. TROUBLESHOOTING 143
- Part 5: Maintenance 144
- 1. ROM Error 149
- 2. RAM Error 149
- 3. EEPROM Error 149
- 4. Home Position 150
- Sensor Error 150
- Temperature Error 153
- 9. No Head Error 155
- 10. Waste Ink Full 155
- 11. Failed 156
- Recharging 156
- Circuit Error 156
- 12. Paper Feed 157
- /Delivery 157
- 21. Ink Low 160
- 1. The Power Does 161
- Not Turn On 161
- 2. Control Panel 162
- 3. BJ Cartridge is 163
- Not Recognazed 163
- 4. Print Defect <1> 164
- The Printer Does 164
- Not Print 164
- 5. Print Defect <2> 165
- White Streakes 165
- 6. Print Defect <3> 166
- Other Print 166
- Problems 166
- 7. Faulty Interface 167
- Scanner Cartridge: 168
- Installation Problems 168
- 7. CIRCUIT DIAGRAMS 176
- The printing paper contains 184
- 70% waste paper 184
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