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Canon LBP 2460 Service Manual - Page 109

Control Panel, Outline, Operation, Table 2-6-1

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CHAPTER 2 B. Control Panel 1. Outline The control panel contains 7 LEDs, one LCD (liquid-crystal display), 9 switches, and one buzzer on the control panel. The control panel is connected to the video controller PCB, and has the following functions. a. Displays status and error messages on the LCD. b. Displays the printer operating status on the LEDs. c. Selects the printing environment, operating mode, utility, and paper source with switches. d. Sounds the buzzer if a switch input is ineffective or an error occurs. Video controller PCB IC10 DC controller PCB J6-C13 nFP CLK J3-3 J6-A14 nFP CS J3-4 AIR J6-C14 nFP DI J3-5 J6-B14 nFP SWRD J3-6 Control panel CPU LEDs Switches Beeper LCD Figure 2-6-3 2. Operation The LEDs, LCD, and buzzer on the control panel are controlled by signals from the video controller. All signals generated by control panel switches are input to the video controller. Table 2-6-1 lists the input and output signals. Table 2-6-1 Pin No. Signal name J3-1 GND J3-2 +5V J3-3 nFP CLK J3-4 nFP CS J3-5 nFP DI J3-6 nFP SWRD GND Meaning +5V Front Panel CLocK Front Panel contoller Chip Select Front Panel serial input signal Front Panel serial output signal 2 - 63

Section	Page
PREFACE	5
CONTENTS	7
CHAPTER 1	11
I. FEATURES	13
II. SPECIFICATIONS	15
III. SAFETY INFORMATION	19
IV. PARTS OF THE PRINTER	20
V. INSTALLATION	26
VI. MAINTENANCE AND SERVICING BY THE CUSTOMER	35
VII. OPERATION	37
CHAPTER 2	45
I. BASIC OPERATION	47
II. ENGINE CONTROL SYSTEM	50
III. LASER/SCANNER SYSTEM	72
IV. IMAGE FORMATION SYSTEM	78
V. PICK-UP/FEED SYSTEM	88
VI. OVERALL CONTROL SYSTEM	106
VII. OPTION CONTROL SYSTEM	110
VIII. ENVELOPE FEEDER	113
IX. DUPLEXING UNIT	117
X. PAPER DECK	127
CHAPTER 3	141
I. EXTERNALS	143
II. DRIVE SYSTEM	152
III. PAPER TRANSPORT SYSTEM	154
IV. EXPOSURE SYSTEM	163
V. ELECTROSTATIC IMAGING/DEVELOPING/CLEANING SYSTEM	164
VI. FIXING SYSTEM	166
VII. ELECTRONIC COMPONENTS	174
VIII. ENVELOPE FEEDER	181
IX. DUPLEXING UNIT	187
X. OPTION CONTROLLER	194
XI. PAPERDECK	195
CHAPTER 4	213
I. MAINTENANCE AND SERVICING	215
II. TOOLS	219
III. MEASUREMENT AND ADJUSTMENT	228
IV. INITIAL CHECK	232
V. IMAGE DEFECTS	233
VI. MALFUNCTION TROUBLESHOOTING	242
VII. PAPER FEEDING TROUBLESHOOTING	265
VIII. LOCATION OF ELECTRICAL PARTS/FUNCTION	272
IX.VARIABLE RESISTORS, LEDS, TEST PINS, JUMPERS, AND SWITCHES ON PC BOARDS	287
X. LIST OF LUBRICANTS, CLEANERS	296
APPENDIX	297
I. GENERAL TIMING CHART-1/2	299
GENERAL TIMING CHART-2/2	300
II. GENERAL CIRCUIT DIAGRAM-1/3	301
GENERAL CIRCUIT DIAGRAM-2/3	302
GENERAL CIRCUIT DIAGRAM-3/3	303