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Chapter 2 Operating Principles
2-1.
Operation of Each Mechanism
2-9
CL-E720DT
2-1-4. Print Head Up/Down Detection Mechanism
The components of the print head up/down detection mechanism are:
(a) SA Head Up Sensor PCB (Head up sensor)
(b) Projection that engages with the photointerrupter
The print head up/down detection mechanism detects the up (open)/down (close) status of the
head block.
When the head block is in the up position, the projection “
A
” is disengaged from the
photointerrupter of the “SA Head Up Sensor PCB” (head up sensor). At this time, the
photointerrupter turns ON and “Low” level is output from the head up sensor.
When the head block is in the down position, the projection “
A
” is engaged in the photointerrupter.
At this time, the photointerrupter turns OFF and “High” level is output from the head up sensor.
The CPU on the “SA Main PCB” detects the up or down position of the head block by sensing the
output from the head up sensor.
SA Head Up Sensor PCB
(Head Up Sensor)
Head Block "Up" position
Head Block "Down" position
Head Block
SA Head Up Sensor PCB
SA Head Up Sensor PCB
Photo-
Interrupter
Photo-
Interrupter
A
A
A
Summary of Contents for CL-E720DT
Page 1: ...Technical Manual CL E720DT Direct Thermal Barcode Label Printer ...
Page 5: ...Chapter 1 Specifications 1 1 CL E720DT CHAPTER 1 SPECIFICATIONS ...
Page 15: ...Chapter 2 Operating Principles 2 1 CL E720DT CHAPTER 2 OPERATING PRINCIPLES ...
Page 75: ...Chapter 3 Disassembly and Maintenance 3 1 CL E720DT CHAPTER 3 DISASSEMBLY AND MAINTENANCE ...
Page 119: ...Chapter 4 Troubleshooting 4 1 CL E720DT CHAPTER 4 TROUBLESHOOTING ...
Page 131: ...Chapter 5 Parts Lists 5 1 CL E720DT CHAPTER 5 PARTS LISTS ...
Page 159: ...Chapter 5 Parts Lists 5 29 CL E720DT DRAWING NO 7 Unit Opepane Rev 0 ...
Page 162: ...Chapter 5 Parts Lists CL E720DT 5 32 DRAWING NO 8 Accessories Rev 0 3 2 1 1 1 2 1 3 ...
Page 164: ...Chapter 6 Circuit Diagrams 6 1 CL E720DT CHAPTER 6 CIRCUIT DIAGRAMS ...
Page 183: ...Appendices AP 1 CL E720DT APPENDICES ...
Page 186: ...Appendices A Mounting Diagrams CL E720DT AP 4 2 Solder side ...