16 April ’88
SCANNER DRIVE
1. Scanner Drive Mechanism
This model uses a dc servomotor [A] to drive the scanners.
The first scanner [B], which consists of the exposure lamp [C] and the first
mirror, is connected to the scanner drive wire by the wire clamp [D]. T h e
second scanner [E], which consists of the second and third mirrors, is
connected to the scanner drive wire by a movable pulley (the second scanner
pulley [F]).
The pulley moves the second scanner at half the velocity of the first scanner.
This is to maintain the focal distance between the original and the lens during
scanning. This relationship can be expressed as:
V1r =
2(V2r) = VD/r
where: r =
Reproduction ratio
V1r =
First scanner velocity (when the reproduction ratio is “r”)
V2r =
Second scanner velocity (when the reproduction ratio is “r”)
VD
—
—
Drum peripheral velocity (150 mm/s)
The wire clamp for the first scanner also works as the actuator of the home
position sensor. The CPU controls both the registration and return timing.
2-13
Summary of Contents for FT4430
Page 1: ...RICOH FT4430 S E R V I C E M A N U A L RICOH COMPANY LTD...
Page 2: ...SECTION 1 OVERALL MACHINE INFORMATION...
Page 3: ...Table of Contents SPECIFICATIONS OPERATION PANEL SECTION A SECTION B...
Page 11: ......
Page 12: ......
Page 17: ...16 April 88 ELECTRICAL COMPONENT LAYOUT 1 14...
Page 25: ...SECTION 2 DETAILED SECTION DESCRIPTIONS...
Page 103: ...SECTION 3 INSTALLATION...
Page 123: ...SECTION 4 SERVICE TABLES...
Page 133: ...16 April 88 SERVICE PROGRAM MODE TABLE 4 8...
Page 134: ...16 April 88 4 9...
Page 135: ...16 April 88 4 10...
Page 145: ...SECTION 5 REPLACEMENT AND ADJUSTMENT...
Page 225: ...SECTION 7 DOCUMENT FEEDER...
Page 263: ...SECTION 8 SORTER...
Page 281: ...SORTER CONTROL BOARD SCHEMATIC IOOV AC s 1 0 2 1 b 4 16 April 88 A024...
Page 282: ...SECTION 9 LARGE CAPACITY TRAT...
Page 301: ...SECTION 10 EDITOR BOARD...
Page 302: ...CONTENTS...
Page 312: ...SECTION 11 TROUBLESHOOTING...
Page 344: ...RICOH FT4430 A024 P A R T S C A T A L O G First Edition April 1988 RICOH COMPANY LTD...
Page 346: ...1 EXTERIOR A024 April 30 88 2...
Page 349: ...2 REGISTRATION A024 April 30 88...
Page 351: ...3 PLATEN COVER AND CASSETTE A024 April 30 88...
Page 353: ...4 PAPER FEED A024 April 30 88 8...
Page 357: ...5 OPERATION PANEL A024 10 April 30 88...
Page 359: ...6 FRAME A024 April 30 88 12...
Page 361: ...7 OPTICS 1 A024 April 30 88...
Page 363: ...8 OPTICS 2 A024 April 30 88 16 1...
Page 365: ...9 AROUND DRUM A024 April 30 88 18...
Page 368: ...10 35 CLEANING UNIT A024 April 30 88 20...
Page 370: ...11 DEVELOPMENT UNIT A024 April 30 88 22...
Page 373: ...I April 30 88 24...
Page 375: ...13 PAPER TRANSPORT A024 April 30 88 26...
Page 377: ...14 FUSING UNIT A024 April 30 88 28...
Page 380: ...15 PAPER EXIT A024 April 30 88 10 6 30...
Page 382: ...16 ELECTRICAL SECTION 1 A024 April 30 88 32...
Page 384: ...17 ELECTRICAL SECTION 2 A024 April 30 88...
Page 386: ...INDEX NO SYMBOL NO...
Page 387: ......
Page 390: ...19 FUSING LAMP DRIVE BOARD A024 April 30 88 38...
Page 396: ...22 AC MAIN HARNES A024 April 30 88 113 118 103 44...
Page 398: ...23 DC MAIN HARNESS A024...
Page 400: ...24 FUSING UNIT HARNESS A024 2 101 104 April 30 88...
Page 402: ...25 COUNTER HARNESS A024 50...
Page 405: ...26 HARNESS PAPER FEED A024 1 J 52...
Page 407: ...27 SPECIAL TOOL A024 April 30 88...
Page 409: ...28 DECAL AND DOCUMENT April 30 88...
Page 410: ...o BI 12 15 8 1 6 WARNING HIGH TEMP 9...
Page 412: ...DF 39 A419...
Page 414: ...1 DOCUMENT FEEDER I A419 April 30 88 2...
Page 417: ...2 DOCUMENT FEEDER II A419 April 30 88 4...
Page 420: ...3 DOCUMENT FEEDER Ill A419 April 30 88 6...
Page 425: ...5 DF HARNESS A419 April 30 88 10...
Page 427: ...CS 2070 A414...
Page 428: ...1 Mini Sorter A414 2 2 Bin Motor Board A414 4 3 Sorter Harness A414 6 Parts lndex 9...
Page 429: ...1 MINI SORTER A414 April 30 88 2...
Page 434: ...RT 15 A912...
Page 436: ...1 LCT I A912 April 30 88...
Page 438: ...2 LCT II A912 4...
Page 440: ...3 LCT Ill A912 April 30 88...
Page 442: ...3 SORTER HARNESS A414 April 30 88 120 115...
Page 447: ...5 LCT HARNESS A912 April 30 88 110 122 10...
Page 449: ...RE 11 A906...
Page 450: ......
Page 451: ...1 RE 11 A906 April 30 88 2 5 2 4 _ _ _ 2...
Page 453: ...PARTS INDEX...
Page 456: ...INTERFACE BOARD TYPE E A426...
Page 457: ...1 interface Board A426 2 Parts Index 5...
Page 460: ...PARTS INDEX...
Page 462: ...SORTER ADAPTER TYPE E A918...