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Canon LBP 2460 Service Manual - Page 275

Table 4-8-2, PS1201, PS931

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CHAPTER 4 Table 4-8-2 Symbol Name Photointerrupter Code Role PS1 Registration paper sensor PS2 Pick-up unit paper sensor PS3 Right door sensor PS1201 Lower cassette sensor PS1202 Upper cassette sensor PS1203 Lower cassette paper-level sensor 1 PS1204 Lower cassette paper-level sensor 2 PS1205 Upper cassette paper-level sensor 1 PS1206 Upper cassette paper-level sensor 2 PS1207 Lower cassette paper-out sensor PS1208 Upper cassette paper-out sensor PS1301 Multi-purpose tray paper sensor PS1302 Lifting plate position sensor PS1401 Face-down tray paper full sensor PS1402 Face-down tray delivery sensor PS1403 Fixing unit delivery sensor PS21 Duplexing unit paper sensor (duplexing unit) PS22 Switchback sensor (duplexing unit) PS23 Side registration guide home position sensor (duplexing unit) PS24 Duplex feed roller 1 home position sensor (duplexing unit) PS931 Envelope feeder paper sensor (envelope feeder) Thermistor TH Detects the fixing upper roller surface temperature. Thermoswitch TP Detects the fixing upper roller abnormal temperature. 4 - 61

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