Canon GP200 Service Manual page 53

OPERATIONS AND TIMING
I. BASIC OPERATION ................................3-1
A. Functional Construction....................3-1
B. Outline of the Electrical Circuitry......3-2
C. Inputs to the Major PCBs .................3-6
D. Main Motor Control PCB ................3-16
II. ORIGINAL EXPOSURE SYSTEM.........3-20
A. Outline ............................................3-20
B. Varying the Reproduction Ratio .....3-22
C. Sequence of Operations
(original exposure system) .............3-22
D. Scanner Motor................................3-23
E. Controlling the Scanning Lamp ......3-24
F. Identifying the Size of Originals......3-26
III. IMAGE PROCESSING ..........................3-29
A. Outline ............................................3-29
B. Analog Image Processing ..............3-31
C. Digital Image Processing................3-33
IV. LASER EXPOSURE SYSTEM ..............3-51
A. Laser Processing Assembly ...........3-51
B. Generating the BD Signal ..............3-53
C. Laser Driver Circuit.........................3-54
D. Controlling the Laser Scanner Motor ...3-56
V. IMAGE FORMATION SYSTEM .............3-58
A. High-Voltage Transformer Circuit ......3-58
B. Controlling the
Primary Charging Roller Bias.........3-60
C. Controlling the
Transfer Charging Roller Bias ........3-63
D. Controlling the Developing Bias .....3-66
E. Controlling the
Separation Static Eliminator Bias ...3-68
F. Controlling the
Transfer Guide/Fixing Roller Bias ...3-69
G. Developing Assembly/
Drum Cleaner .................................3-70
H. Primary Charging Roller
Cleaning Mechanism ......................3-73
I. Detecing Errors on the
Composite Power Supply PCB.......3-74
VI. PICK-UP/FEEDING SYSTEM ...............3-76
A. Outline ............................................3-76
B. Pick-Up from the Cassette .............3-79
C. Non-Pick Up Operation (standby)....3-91
D. Detecting the Level of Copy Paper ...3-93
COPYRIGHT © 1996 CANON INC.
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CHAPTER 3
VII. FANS ...................................................3-139
VIII. POWER SUPPLY ................................3-141
IX. SYSTEM ..............................................3-148
X.
XI. SELF DIAGNOSIS...............................3-261
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
E. Detecting the Size of Copy Paper ...3-95
F. Multifeeder ....................................3-100
G. Controlling the
Registration Roller Clutch.............3-103
H. Making Overlay Copies ................3-104
I. Making Two-Sided Copies............3-106
J. Lower Feeding Assembly .............3-108
K. Fixing/Delivery Assembly .............3-118
L. Delivery Assembly ........................3-127
M. Detecting Jams.............................3-130
A. Functions and Operaitons ............3-139
A. Outline ..........................................3-141
B. SLEEP Mode................................3-145
A. Basic Operation ............................3-148
B. Diagram of the Function Boards ..3-150
C. Flow of Image Signals ..................3-154
SERVICE MODE .................................3-158
A. Outline ..........................................3-158
B. Using Service Mode .....................3-159
C. Using Adjustment
Mode and Settings Mode .............3-160
D. *1* DISPALY
(control display mode) ..................3-161
E. *2* I/O DISPLAY
(I/O display mode) ........................3-178
F. *3* ADJUST (adjustment mode) ..3-197
G. *4* FUNCTION (function mode) ...3-208
H. *5* OPTIN (settings mode)...........3-228
I. *6* COUNTER (counter mode) ....3-234
J. *7* ACC (accessory mode) ..........3-238
K. Electrical System..........................3-242
A. Copier ...........................................3-261
B. Self Diagnosis of the RDF-G1......3-266
C. Self Diagnosis of the ADF-F1.......3-266
D. Self Diagnosis of the Pedestal .....3-267
E. Self Diagnosis of the
Multi Output Tray -C1 ...................3-267
F. Self Diagnosis of the
Multi Output Tray-12 .....................3-268