4.3.3 Lens Positioning
The lens home position sensor [A] informs the main board when the lens is at
full size position (home position). The main board determines the lens stop
position in reduction and enlargement modes by counting the number of
steps the motor makes with reference to the lens home position. When a new
reproduction ratio is selected, the lens [B] moves directly to the selected
magnification position.
The lens home position is registered each time the lens starts from or passes
through the lens home position sensor. As the lens moves from the
enlargement side to the reduction side, the sensor registers the home
position. This occurs when the actuator plate [C] enters the lens home
position sensor.
The lens can be seen to go back and forth when the lens moves through the
home position from the reduction side to the enlargement side. The lens is
going in the wrong direction to register the home position. The lens
overshoots the home position by 20 pulses before going back to register the
home position and it then overshoots it by 1 pulse before finally settling there.
The lens always stops while moving from left to right (as viewed from the
front) to minimize the error caused by mechanical play in the drive gears [D].
[D]
[A]
[C]
[B]
(Initialize)
20
20
1
L
H
1 pulse = 0.06 mm
pulses
(Enlarge
→
Full Size)
(Reduce
→
Full Size)
20
Lens H.P. Sensor Signal
(Full Size
→
Enlarge
)
(Full Size
→
Reduce
)
(Reduce
→
Enlarge
)
(Enlarge
→
Reduce
)
(Enlarge
→
Enlarge
)
(Reduce
→
Reduce
)
OPTICS
12 February 1992
2-28
Summary of Contents for A085
Page 3: ...FT4227 FT4427 FT4727 A085 A087 A088 ...
Page 6: ...3 LOCATION OF UNIT ...
Page 7: ...4 LOCATION OF UNIT ...
Page 8: ...5 LOCATION OF UNIT ...
Page 9: ...6 LOCATION OF UNIT ...
Page 10: ...7 LOCATION OF UNIT ...
Page 11: ...8 LOCATION OF UNIT ...
Page 12: ...9 LOCATION OF UNIT ...
Page 13: ...10 1 EXTERIOR 1 A085 A087 A088 ...
Page 15: ...12 2 EXTERIOR 2 A085 A087 A088 ...
Page 17: ...14 3 OPERATION PANEL A085 A087 A088 ...
Page 19: ...16 4 PLATEN COVER A085 A087 A088 ...
Page 21: ...18 5 OPTICS SECTION 1 A085 A087 A088 ...
Page 23: ...20 6 OPTICS SECTION 2 A085 A087 A088 ...
Page 25: ...22 7 OPTICS SECTION 3 A085 A087 A088 ...
Page 27: ...24 8 OPTICS SECTION 4 A085 A087 A088 ...
Page 29: ...26 9 OPTICS SECTION 5 A085 A087 A088 ...
Page 31: ...28 10 BY PASS FEED TABLE A085 A087 A088 ...
Page 33: ...30 11 PAPER FEED TRAY A085 A087 A088 ...
Page 35: ...32 12 PAPER FEED SECTION A085 A087 A088 ...
Page 37: ...34 13 TRAY LIFT SECTION A085 A087 A088 ...
Page 39: ...36 14 LCT SECTION 1 A087 A088 ...
Page 41: ...38 15 LCT SECTION 2 A087 A088 ...
Page 43: ...40 16 LCT SECTION 3 A087 A088 ...
Page 45: ...42 17 VERTICAL TRANSPORT SECTION A085 A087 A088 ...
Page 47: ...44 18 PAPER REGISTRATION A085 A087 A088 ...
Page 49: ...46 19 DRUM SECTION 1 A085 A087 A088 ...
Page 51: ...48 20 DRUM SECTION 2 A085 A087 A088 ...
Page 53: ...50 21 DEVELOPMENT UNIT 1 A085 A087 A088 ...
Page 55: ...52 22 DEVELOPMENT UNIT 2 A085 A087 A088 ...
Page 57: ...54 23 CLEANING UNIT A085 A087 A088 ...
Page 59: ...56 24 T S CORONA UNIT A085 A087 A088 ...
Page 61: ...58 25 TRANSPORT SECTION A085 A087 A088 ...
Page 63: ...60 26 FUSING UNIT 1 A085 A087 A088 ...
Page 65: ...62 27 FUSING UNIT 2 A085 A087 A088 ...
Page 67: ...64 28 PAPER EXIT SECTION 1 A085 A087 A088 ...
Page 69: ...66 29 PAPER EXIT SECTION 2 A085 A087 A088 ...
Page 71: ...68 30 FRAME SECTION 1 A085 A087 A088 ...
Page 73: ...70 31 FRAME SECTION 2 A085 A087 A088 ...
Page 75: ...72 32 FRAME SECTION 3 A085 A087 A088 ...
Page 77: ...74 33 FRAME SECTION 4 A085 A087 A088 ...
Page 79: ...76 34 DRIVE SECTION 1 A085 A087 A088 ...
Page 81: ...78 35 DRIVE SECTION 2 A085 A087 A088 ...
Page 83: ...80 36 ELECTRICAL SECTION 1 A085 A087 A088 ...
Page 85: ...82 37 ELECTRICAL SECTION 2 A085 A087 A088 ...
Page 87: ...84 38 ELECTRICAL SECTION 3 A085 A087 A088 ...
Page 89: ...86 39 ELECTRICAL SECTION 4 A085 A087 A088 ...
Page 91: ...88 40 DUPLEX UNIT 1 A088 ...
Page 93: ...90 41 DUPLEX UNIT 2 A088 ...
Page 95: ...92 42 DUPLEX UNIT 3 A088 ...
Page 97: ...94 43 MAIN CONTROL BOARD A085 A087 A088 ...
Page 98: ...95 43 MAIN CONTROL BOARD A085 A087 A088 ...
Page 99: ...96 43 MAIN CONTROL BOARD A085 A087 A088 ...
Page 102: ...99 44 MEMORY BOARD A085 A087 A088 ...
Page 104: ...101 45 AC HARNESS A085 A087 A088 ...
Page 106: ...103 46 DC HARNESS TYPE 2 A085 A087 A088 ...
Page 108: ...105 47 DC HARNESS TYPE 4 A085 A087 A088 ...
Page 110: ...107 48 FUSING UNIT HARNESS A085 A087 A088 ...
Page 112: ...109 49 LCT HARNESS A087 A088 ...
Page 114: ...111 50 DECAL AND DOCUMENT A085 A087 A088 ...
Page 115: ...112 50 DECAL AND DOCUMENT A085 A087 A088 ...
Page 116: ...113 50 DECAL AND DOCUMENT A085 A087 A088 ...
Page 117: ...114 50 DECAL AND DOCUMENT A085 A087 A088 ...
Page 118: ...115 50 DECAL AND DOCUMENT A085 A087 A088 ...
Page 120: ...117 51 SPECIAL TOOL A085 A087 A088 ...
Page 122: ...PARTS INDEX ...
Page 154: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 163: ...SECTION 2 DETAILED SECTION DESCRIPTION ...
Page 165: ...SECTION 3 INSTALLATION ...
Page 178: ...SECTION 4 SERVICE TABLES ...
Page 201: ...SECTION 5 REPLACEMENT AND ADJUSTMENT ...
Page 227: ...FT5233 5433 5733 SERVICE MANUAL ...
Page 230: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 255: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...
Page 373: ...SECTION 3 INSTALLATION ...
Page 403: ...SECTION 4 SERVICE TABLES ...
Page 449: ... 6 Duplex Tray PREVENTIVE MAINTENANCE SCHEDULE 12 February 1992 4 46 ...
Page 456: ...SECTION 5 REPLACEMENT AND ADJUSTMENT ...
Page 575: ...SECTION 6 TROUBLESHOOTING ...