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A - 12, Input/output signals to option controller PCB

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APPENDIX B. Input/output signals to option controller PCB Connector J101 J102 Pin Abbreviation I/O Logic A1 +5V A2 RESET I A3 /PRINT IL A4 /SPCHG IL A5 /PDLV IL A6 /undetermined 1 I A7 N.C. A8 /CKEN IL A9 /TX IL A10 GND B1 +5V B2 N.C. B3 /VSYNC IL B4 /PFED IL B5 GND B6 /undetermined 2 I L B7 /STROBE L B8 /RX OL B9 /CLK OL B10 GND 1 /TX OL 2 GND 3 /RX IL 4 /TERMINATE I L 5 N.C. 6 /CLOCK IL 7 GND 8 GND 9 GND (KEY) 10 N.C. 11 GND 12 /STROBE OL 13 PWRON OL 14 GND 15 N.C. Signal name RESET signal (unused) PRINT signal (unused) SPEED CHANGE signal (unused) PAPER DELIVERY signal For expansion COMMUNICATION READY signal SERIAL IN signal VERTICAL SYNC signal PAPER FEED signal For expansion STROBE signal SERIAL OUT signal SYNCHRONIZED CLOCK signal SERIAL OUT signal SERIAL IN signal COMMUNICATION READY signal SYNCHRONIZED CLOCK signal Mis-insertion prevention STROBE signal POWER ON signal A - 12

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