II
- 5
2.2.3
Sensors
This machine has three sensors--PE/cover sensor (photosensor), thermistor in the thermal
recording head, and left-hand CIS unit acting as a home position detector of the copyboard screen.
The PE/cover sensor is located on the PE/cover sensor PCB secured to the recorder frame. It
detects whether the recording paper is present or the paper compartment cover is closed.
The thermistor in the recording head allows the controller to monitor the temperature of the head.
According to the change of the thermistor's internal resistance monitored, the controller manages
the duty cycle of the head drive current.
The left-hand CIS works as a home position detector of the copyboard screen also. If it detects
either of the two black HP marks pasted on the copyboard screen, it recognizes that the screen is
in the home position.
Summary of Contents for CB200
Page 1: ...COPYBOARD SERVICE MANUAL MODEL CP1800 CP2000 CB200 ...
Page 4: ...CHAPTER I GENERAL DESCRIPTION ...
Page 8: ...CHAPTER II THEORY OF OPERATION ...
Page 10: ...II 1 2 1 OVERVIEW ...
Page 12: ...II 3 ...
Page 15: ...II 6 2 3 CONTROL ELECTRONICS ...
Page 16: ...CHAPTER III DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 22: ...III 4 n n Disassembly Order Flow ...
Page 52: ...III 34 ...
Page 54: ...III 36 3 Paste two black HP marks onto the ruled side of a new white sheet as specified below ...
Page 59: ...III 41 3 Lower pipe holder L 4 Lower pipe holder R ...
Page 60: ...III 42 5 Upper pipe shaft ...
Page 61: ...CHAPTER IV MAINTENANCE MODE ...
Page 69: ...IV 7 Dump List a b c d e f g h i ...
Page 73: ...CHAPTER V ERROR INDICATION AND TROUBLESHOOTING ...
Page 86: ...CP1800 CP2000 CB200 APPENDIX Circuit Diagrams A Main PCB B Relay PCB ...
Page 87: ...A Main PCB 1 4 ...
Page 88: ...A Main PCB 2 4 ...
Page 89: ...A Main PCB 3 4 ...
Page 90: ...A Main PCB 4 4 ...
Page 91: ...B Relay PCB ...