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2. COPYING PROCESS

F. Development (step 4)

Blade

Blade

Stray-toner collecting electrode

Figure 2-107

The process in which the latent static image on

the surface of the photosensitive drum is turned
into a visible image is called development.

Since the

is designed so that the

areas on the surface of the photosensitive drum
exposed to a laser beam will attract toner, the
toner is charged to a negative potential (the same
potential as in primary charging).

As shown in Figure 2-107, the developing

assembly consists of a developing cylinder and a

magnetic blade. The developing cylinder in turn

consists of a fixed magnet and a cylinder which

rotates around the magnet.

The developer is composed of toner (mainly

resins and dye) and carrier (iron powder) mixed at

a specific ratio. The toner and the carrier are
charged to a negative and a positive potential,

respectively, by friction against the rotating cylin-

der.

The developer is held in the form of a brush

over the surface of the cylinder within the mag-
netic field of the fixed magnet, and is deposited in
a uniform layer by a blade.

Figure 2-l

08

Double blanking pulses and a DC bias (nega-

tive component) are applied to the developing
cylinder to improve development efficiency and

reproduction of highlighted areas, resulting in a

developing bias with a larger negative than posi-
tive component.

During copying, toner is attracted to the light

areas of the photosensitive drum because of the

drum surface potential and the negative potential
of the developing bias, turning the latent static
image into a visible image. Excess toner is then
repelled by the photosensitive drum because of
the drum surface potential and the positive com-
ponent of the developing bias.

The electrode plate under the developing

cylinder is supplied with a high voltage (positive)
to attract stray toner, thereby preventing soiling of
the inside of the machine.

COPYRIGHT 1997 CANON INC.

CANON

REV.1 MAY 1997 PRINTED IN JAPAN

AU JAPON)

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Содержание CLC1000

Страница 1: ...COLOR LASER COPIER 1000 SERVICE MANUAL REVISION 1 MAY 1997 Canon FY8 13E3 010 COPYRIGHT 1997 CANON INC CANON CLC 1000 REV 1 MAY 1997 PRINTED IN JAPAN ...

Страница 2: ...anism The built in duplexing unit enables automatic copying on both sides of sheets 4 Paper of up to 209 g Postcards and other materials of heavy stock may be used for copying 5 Various creative functions In addition to such basic creative functions as editing of hue and brightness installation of the ED Board Al provides such complex creative functions as framing gradation and freehand 6 Full lin...

Страница 3: ...ifeeder feeding roller Multifeeder pick up roller Multifeeder tray Delivery vertical path roller Duplexing reversal inlet roller Lower fixing roller web Duplexing reversal feeding roller Duplexing reversal outlet roller Waste toner box Pre duplexing feeding assembly Transfer belt Transfer cleaning blade Transfer belt cleaning web Cassette 2 Duplexing unit Polishing roller Oil removing roller Casse...

Страница 4: ...g Pre Heat key Press it to start pre heating mode or to stop it Interrupt key Press it to suspend on going copying and to make a copy 0 Start key 8 Clear key Press it to start copying Press it to change the copy count or settings ID key Call key Press it to start ID mode Press it to recall up to three previous copying modes A press on the key starts ID mode rejecting subsequent copying commands wi...

Страница 5: ... after copying to avoid jamming Keep unused transparencies in a box and store them avoiding high temperature and humidity 4 n Points to Note about the Orientation of Transparencies l Orient each transparency so that it is fed in the correct direction When Placing in a Cassette l If vertical orient it so that the white triangle at the corner is front left 0 l If horizontal orient it so that the whi...

Страница 6: ...ass Separation _ flG __ Pre f axing t l _ II _ _ chargiqc rancfor halt dnzaninn umh w Transfer belt 6 I 8 I Pre duplexing feeding casse Cassew 1 Transfer blade Transfer belt Figure 2 101 deck COPYRIGHT 4 lM7 CANON INC CANON CCC1000 REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 2 l ...

Страница 7: ...the corresponding process color of toner complementary to the corresponding filter for transfer to copy paper the step is executed alike for Y M C and K The resulting image is fixed to the paper pro ducing a color copy of the original The CLCl 000 uses four photosensitive drums for transfer of images to copy paper and a trans fer belt is used to ensure that copy paper is moved horizontally under e...

Страница 8: ...rences in potential is not visible to the human eye and is called a static latent image Time t c _ I _ ____ L I Light area exposed to laser 8 Dark area white on original Pre exposure Primary charging Image expose step 1 step 2 step 3 Figure 2 103 C Pre Exposure step 1 Photosensitive Figure 2 l 04 In preparation for primary charging the light from the pre exposure lamp is directed to the sur face o...

Страница 9: ... a bias is applied to the grid to ensure a specific drum surface potential E Laser Exposure step 3 Laser beam Dark area Light area Figure 2 l 06 A laser beam of an intensity suited to the image density of the original is directed to the sur face of the photosensitive drum thereby neutral izing the charges on the surface Such areas are called the light areas of the photosensitive drum and will late...

Страница 10: ...the rotating cylin der The developer is held in the form of a brush over the surface of the cylinder within the mag netic field of the fixed magnet and is deposited in a uniform layer by a blade Figure 2 l 08 Double blanking pulses and a DC bias nega tive component are applied to the developing cylinder to improve development efficiency and reproduction of highlighted areas resulting in a developi...

Страница 11: ...where the paper and the photosensitive drum come into contact This is done by applying a high voltage constant current through a blade and onto the back of copy paper from behind the transfer belt The CLClOOO uses the same transfer charges to retain copy paper on the transfer belt For the first color Y transfer occurs at the same time as when the copy paper is drawn to the transfer belt by the wor...

Страница 12: ...ding on the selected color mode a max imum of four transfers takes place before the copy paper is forwarded to the fixing assembly A pair of fixing rollers move the copy paper under pressure and heat thereby melting the toner particles of four colors to produce as many colors as needed reproducing the original images and fusing them into the fibers of the paper To prevent adhesion of toner from co...

Страница 13: ...the next copying run the cleaning blade scrapes off the residual toner from the surface of the drum The collected toner is moved by the waste toner feeding screw to the rear of the copier and is collected in the waste toner case 2 8 COPYRIGHT81997 CANONINC CANONCLClOOOREV 1 MAY1997 PRlNTEOINJAPAN IMPRIMEAUJAPON ...

Страница 14: ... remove localized positive charges remaining on the photosensitive drum 6 Pre Fixing Charging Transfer belt Figure 2 202 The toner on the copy paper after separation is more or less neutralized and yet is subject to change while the paper is forwarded The CLClOOO causes its pre fixing charging assembly to apply a negative DC bias immediate ly after separation of copy paper from the transfer belt t...

Страница 15: ...s of a grounding roller D Static Eliminator i I I I I 1 Y I I I _ I I I 0 __ I __ 1 3 I I I I I _______I I _ _____I I I Figure 2 204 The transfer belt after separation of copy paper holds residual charges that occur during transfer The static eliminator is used to remove charges from the transfer belt preparing for retention and transfer for the next copying run Actually by applying negative charg...

Страница 16: ...ade Transfer belt cleaning web Removes toner from the transfer belt during registration control Removes oil from the transfer belt Oil removing roller Polishing roller Removes oil from the transfer belt that builds up after two sided copying Roughens the surface of the transfer belt to prevent transfer of oil from the transfer belt to the photosensitive drum COPYRlGHTQ1997CANONINC CANONCLClDOO REK...

Страница 17: ...ne is used and changes over time 2 Reflectance of Toner The ideal toners representing the primary col ors yellow magenta and cyan should absorb 100 percent of the spectrum of their complemen tary colors and reflect 100 percent of the rest Such toners however are not available at pre sent 3 Dry Electrostatic Photography and Gradation As shown in Figure 2 301 it is impossible to reproduce the densit...

Страница 18: ...velopment Toner supply Pick up Retention Transfer Separation Drum Cleaning Fixing indirect electrostatographic Corona Laser beam Automatic Toner projection brush development in Y M C and Bk Manual 750 g of Y M and C 640 g of Bk 2 front cassettes special paper deck multifeeder Static retention concurrent with Y transfer Blade transfer belt Static Blade Heat roller 700 W upper 500 W lower Table l 20...

Страница 19: ... 209 g m2 including cast coated paper postcard special papers 1 and 2 type transparency special Paper deck Plain paper 80 to 105 g m2 transparency special Two sided copying Plain paper 105 g m2 automatic two sided manual two sided Cassette Clawless center reference about 500 sheets of 81 4 g m2 Multifeeder about 250 sheets of 81 4 g m2 Paper deck 410 mm stacking height about 4000 sheets of 81 4 g ...

Страница 20: ...pt Provided ID mode Provided Auto start Provided Auto clear Provided Pmin standard may be changed or disabled in user mode Auto power off Provided 2 hr standard may be varied or disabled in user mode Pre heating Provided Area selection non rectangular area selection Provided w ED Board Al Freehand selection Provided w editor Composition Provided w ED Board Al Image create Provided some functions w...

Страница 21: ...less approx A4 full color continuous Standby 0 62 kW h approx reference only 73 dB copying Sound power level by IS0 64 dB standby 1 m from machine 0 02 ppm or less average over 8 hr Keep wrapped and protect against humidity Avoid direct rays of the sun keep at 40 C or less Avoid direct rays of the sun See Figure l 201 458 2 kg body only Copyboard 3 7 kg Editor 4 9 kg Paper Deck 25 5 kg Table l 205...

Страница 22: ... 153 B5 A4 Japanese 6R5E A3 A5 0 500 A4R 84 A5 B5 1 223 A3 B5 0 611 A4R A3 B5R 84 1 414 A3 A4R 84 B5R 0 707 A5 A3 2 000 B4 A4R 0 815 4 000 _ A3 84 0 865 North American l 6 Table l 206 COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 23: ...tra thick Standard 9 4 6 Multifeeder 2nd side paper Glossy 6 4 4 Standard 6 4 4 Thick paper Glossy 6 4 4 Transparency Standard 6 4 4 Table l 207 Copying Speed copies minute I Specifications subject to change without notice I Reference _ The CLChO I hi f q eeci to a specific standard to produce the degree of shine selected by the us A higher fixing speed decreases the shin producing a matte effect ...

Страница 24: ...for Devices and Radiological Health CDRH of the Food and Drug Administration of the U S A put an act in force to deal with laser devices Under the act laser devices manufactured on and after August 1 1976 may not be marketed in the United States without approval Figure l 302 shows the label which serves as proof of approval under the act the label is required to be attached to all laser devices ma...

Страница 25: ... shutter needs to be held open using a door switch actuator Keep these in mind when such work is necessary f CAmoN LASER RAC4ATlON WHEN OPEN AVOID EXPOSURE TO BEAM F RAYONNEMENT LASER EN CAS WOUVWTUfE EXPOSiXlN DANGEREUSE AU FALSCEAU m LASERSTRAHLUNG WENN ABDECKUNG GEOFFNET NIGHT DEM STRAHL AUSSl3ZEN RAMACKIN LASER CUANDO SE ABRE EVKAFI EXFONERSE AL RAYO RADIAZIONE LASER IN CASO DI APERTURA EVKARE...

Страница 26: ...nel Editor option Hopper cover toner supply opening Multifeeder Paper deck option in Japan Figure l 401 0 Control key power switch Front right door Cassette 1 Cassette 2 0 Front left door G3 Copy tray COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 27: ...h Hopper assembly 0 Transfer unit Duplexing unit 0 Pre duplexing feeding assembly I Waste toner box I Fixing delivery reversing unit Fixing oil bottle I Document holder Figure l 402 COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PAINTED IN JAPAN IMPRIME AU JAPON l 11 ...

Страница 28: ... 1 GENERAL DESCRIPTION B Cross Section 1 12 _ r 2 COPYRIGHT81997 CANON INC Figure l 403 CANONCLCIOOO REV lMAY1997 PRlNTEDINJAPAN IMPAIMEAUJAPON ...

Страница 29: ...mage processing laser exposure image formation and control AControl block Reader controller PCB l jDC controller PCB j c Analog processor PCX Amage formation Mock t re fixing fwdln Transfer belt cleaning Holding tray Upper cassette Figure 3 101 COPYRlQHTQ1997 CANON INC CANONCLClOWREV lMAY1997 PRINTED INJAPAN IMPRIMEAUJAPON 3 l ...

Страница 30: ...or ED board I Image processor PCB I t Interlace Board L 1 Scanner motor driver PCB Reader controller PCB Lamp regulator Control panel CCF Projector Editor DF Copy Data Controller AC drtver PCB Potential meawrement PCB Laser scanner motor Laser 8canrmr motor driver PCB Motor Fan Clutch Solenoid CPU u a2324 RAM a2342 4l a2343 7 ROM a2340 I a2341 IPC ii a2325 SALT 000 PCB izziij Ssnsor swttdl Flting ...

Страница 31: ... 2501 3 J 2502 J 2503 J 1453 Image processor PCB IP memory PCB ED board J1308 J 1431 COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTEO IN JAPAN IMPRIME AU JAPON _ Reader controller PCB Check in the field not possible J 1806 vJ2110 We0 controller PCB r c c J 3251BK Figure 3 103 t I See Chapter 3 laser exposure system 3 3 ...

Страница 32: ... at home position 1 124V Scanner assembly cooling fan 1 When 6 FMlO ll turns ON Scanner assambly cooling fan 2 j 24V Scanner assembly cooling fan 3 i 24V Scanner assembly cooling fan 4 3D ksON _ _ I 1602A n J 1306A TP6 J 1305A Reader controller PCS See Chapter 3 original exposure system See Chapter 3 orfglnal exposure system Figure 3 104 COPYRIQHT Q 1997 CANON INC CANON CCC1000 REV 1 MAY lQ97 PRIN...

Страница 33: ...ontrdler PCS J 1307 J6244 To Copy Data Controller Al Copy Data Controller Al PCS J 6245 J 13068 Bee the Servke Manuel lor the Copy Data Controller Al 15V CD When 0 CCV V turns ON CDr When c d Is Inwrted 0 1 J6257 2 J1304 2 3 3 c c v 4 4 1 1 To editor Y See Chapter 3 u or J 13058 To projector see the sefvke Manual lor the projector J 1305A To RF El x J 13068 See the Servke Manual lor the RF El L Fi...

Страница 34: ...blocking plate Is at PSB J 6077 1 J 22148 6 Hdding tray front feeding 2 5 sensor 2 PS 9 3 4 Figure 3 106 I ff II DC controller PCB PTHLED PTHDTl r See Chapter 3 PTHDT2 pick up feeding system PS DT When copy paper is at PSl 1 when fight blocking plate is at PSl PS2DT When muftifeeder lifter is up 1 when light blocking plate is at PS2 When multifeeder fiier is down 1 ps3DT when light bfocking pfate ...

Страница 35: ... Altsmatesbetwsn 1 and1 wMe bansfsr belt cleanii web ddvs llutol is rotating Whsn hgth of ban r bslt dsaning web falls bslow sp hz vsius 1 kght blocking plats is at PSl 1 when Iii of tran bslt is up 1 cut off in light ccldng plats 01 kfter up down drive csm is at PS12 When transfer Ml Mter is dorm 1 cut off in iight o ing plats of ktsr up down drive UL II is at PSt3 Whsn copy pspsr is at PS14 1 wh...

Страница 36: ..._ DC controller PCS PS 21 DT PS 22DT PS 23DT PS 24DT PS 25DT PS 26DT PS 27DT I 26DT 5V f PS 29DT YL IV f PS 30DT h WhenmpypaparkatP621 1 when thModrtng plats b at ps2i wnplckupdccforpapxdedtis ckad I when li twihg stats is at P322 whenC0pypeperkthlXWttsl 1 when ttght t king ptata is at PS23 When caaaatte 1 liner is up 1 tin light Whg ptats is at P324 When copy papsr is at PS25 1 whan t ht hkditq p...

Страница 37: ...h sensor unft J6201 1 2 PS32 3 J6202 1 2 PS33 3 J22llA 1 9 _2 PS32DT h 0 10 PS 33DT 0 J6263 1 2 11 PS34DT PS34 3 5V J6207 1 J2211B 2 2 5 PS 35DT PS35 3 3 5V J6013 1 J2209A 1 2 2 PS36 3 14 a PS36DT 5v J 6273 1 J22llB 9 2 6 P S 3 6 3 7 PS 36DT I I whencccypspsrbatP632 l when l MocldngptabbetFS32 when ccfy paper b at PS33 I when twngptstsbatPS33 vmsn psperbstP634 l kMhfrxwwtebstps3o whmccpypapwbstP63...

Страница 38: ...j1 _3401 5 YTEPL I I I ci I t Error sensor for M hopper Error sensor for C hopper J22OQB 1 522098 l I YTEP J22OQB 1 MTEP 522098 l CTEP J22OQB 1 KTEP Bk loner level J6337 3 1 sensor TSB 2 t lower lopper relay 1 F CB m _ OHPLEO OHPSDT TSSLCT Detects length of copy paper based on combination of various input signals Detects width of copy paper in association with multifeeder and side guide plate of e...

Страница 39: ... 6255M J 6223h A 1 COPYRIGHT 0 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON Y potential measurement PCB J 6220Y J 2216 _ M potential measurement PCB J 22161 I 1 Figure 3 111 I 14 15 j 1 2 10 4 11 12 13 1 B 4 I KEYSW When key switch is inserted 0 27 W TBDP When waste toner clogging is detected 0 F KBLK 1 When fixing assembly knob is set 0 MFDDC When multifeeder is c...

Страница 40: ...l measurement sensor J 6220K I 4 I 2 1 I J 2216 I 1 Multifeeder relay PCB _ I 1 9 J 5586 J 22078 l 3 7 7 EVI l4 J 6224Y 6 0 6 4 10 2 6 I J6OfBY Figure 3 112 J 11 EPC K A EVRMT EVHUM EVTEMP 51 Check in the field not possible Check in the field not possible Check In the field not possible r 3 12 COPYRIOHT 0 1997 CANON INC CANON CLClQOO REV 1 MAY 1997 PRINTEO IN JAPAN IMPAIME AU JAPON ...

Страница 41: ...P See Chapter 3 feeding system 71 J 22068 8 THM3 J29olF CCD front PCB for pattern reading J 2653F Image poaltlon correction PCB front LED front PCB for pattern reading J 2951 R LED rear PC9 for pattern reading J 2654R J 2651 F J 2651R Figure 3 113 J 2203 J 2204 V f DC controller PCB See Chapter 3 image formation See Chapter 3 image formation See Chapter 3 laser exposum See Chapter 3 Iaaer ewoaum C...

Страница 42: ...D When 1 cssssffe fwaterlPapsr deck heater tums ON KDRHD Wfwn 1 Bk drum he r tums ON When 1 C drum healer twns ON L_ zf MDRHD When 1 M drum healer turns ON YDRHD When 1 Y drum heater turns ON wfrsn 1 M9rJ turns ON A p 33 TERR L When shortckcuit b detecfed in bwer fbfng heswrtrbc I fnput dgnrl TERR U When sfwrtcircuk b detected in upper fblng heater trbc 0 fqnrt signsI When 0 upper fbing heater tum...

Страница 43: ...lade comes into contact with transfer belt SLGDR When 0 SLGDR turns ON transfer cleaning blade leaves transfer belt SLNDS When 6 SLNDS turns ON transfer blade comes into contact wfth transfer belt SL7YDR When 0 SL7YDR turns ON transfer blade leaves transfer heft SL7MDS When W SL7MDS turns ON transfer blade comes Into contact wfth transfer belt SL IMDR When 0 SLlMDR turns ON transfer blade feaves t...

Страница 44: ...exing paper deflecting plate solenoid L Stopper plate solenoid Paper feeding roller sofenold Delivery paper deflecting plate sofenold Separation claw releasing solenoid Reglstratlon releasing sohoM 24V SLt 1SD When 0 SLI IS turns ON lmm SLttRD When O SLllMtumsON II l J 6171 2 SLIIL 1 13 SLt 1LD When 9 SLI IL turns ON 24V 7 SLIPDR When 0 SLIPDR turns ON stopper plate shffts down U l J6175 2 SLf3 1 ...

Страница 45: ...m l J6315 2 sLl8 I J22186 10 FT8001 J 2223A 1 SLaGw Fraoo2 6 J 22098 1 3 Figun 3 l 17 _ DC controller PCB 24V _f SLl7YDO When O SLlNDC turns ON shutter opens SL17YDC When o SLINDC turns ON shutter closes 24V 3 SL17MDO When I SL17MDO turns ON shutter opens SL17MDC When 6 SLIlMDC turns ON shutter closes 24V f SLl7CDo When 6 SL17CDO turns ON shutter opens SLl7CDC When I SLl7CDC turns ON shutter close...

Страница 46: ...pick up clutch 3LlOD When 6 CL10 turns ON 3Lll D When 6 CL1 1 turns ON Ll2D When I CL12 turns ON L13D When 6 CL13 turns ON J556lB 2 4 V 1 f J 5502 J 2222P 2 3 IC Pick up vertical path roller 2 clutch J 6141 J556lB 2 4 V 2 7 f I J 5503 J 2222E3 Cassette 3 pi up clutch Ll SLl4D When 0 CL14 turns ON Pick up vertical path roller 3 clutch 1 24V J2223B 14 I5 CLlGD When 0 CL16 turns ON 24V Reversal drive...

Страница 47: ...Dellvery lower cooling fan 2 J2223A 11 13 STFCD When 0 CL801 turns ON 12 I STPCD When 0 CL8092 turns ON 24V J2212B 4 f 5 FMBD 6 FM3SPD FMSD 24V J 2233 1 2 FMGD 24V J2214A 1 24V J2215B 1 j 2 FM8D 24V J 22158 3 4 FM9D 24V 11 12 FM2OD When FM_D O FM_PD l high speed rotation When FM_D O FM_PD O low speed rotation When 0 FM4 turns ON When o FM5 turns ON When o FM6 turns ON When 0 FM7 turns ON When o FM...

Страница 48: ...n mirror reproduction correctton motor for Bk DC controller PCB r 24V J6029 5 J 2206A 2 3 M2_A 4 MZ B 6 M2_6 24V J6031 5 J2206k6 11 7 M3 A 6 M3 A 10 M3 B 12 M3_2 24V 4 M5 B 6 a M5 B 24V J221 OA 6 11 7 I M6 A 0 6 A 10 M6 B 12 M6_B lifter moves down Alternates between 1 and 0 while M2 is rotating Alternates between 1 and 0 while M3 is rotating See Chapter 3 laser exposure Alternates between 1 and 0 ...

Страница 49: ...See Chapter 3 pick up feeding system 5v f MOPLL MOD h 24V f I l l A dll A 411 B All 0 24V f M12D 4v 3 413 A Ml3 A Ml3 B H13 B M14D M14PLs h M150N MlSPLL MlSDlR h When error is detected while Ml0 is rotating 1 When 0 Ml0 rotates While Ml 1 is rotating alternates between 1 and 0 When 0 Ml2 rotates While Ml 1 is rotating alternates between 1 and 0 sea chapter 3 pkk UpneedIng system I See Chapter 3 pf...

Страница 50: ...7 3 J 2226A 12 13 14 J 2220B 13 12 J6167 3 J2224B 3 4 4 I 2 2 5 5 a fi Figure 3 122 DC controller PC6 M16ON When 1 Ml6 rotates M170N When I Ml7 rotates IIBCPLL HBCON h When motor detects error 1 When I Ml6C turns ON 16BkPLL 1 EBkON When motor detects error 1 When I MlBBk turns ON D6YPLL 116YON h When motor detects error 1 When 1 Ml6Y turns ON IBMPLL 16MON When motor detects error I When I Ml BM tu...

Страница 51: ...OPND I shutter spent 2 7 2 L L When S CLSD 1 shutter doses J662lC 3 5 LA3 1 6 LA30N 24V J662lK 3 7 IA4 1 LMON I J4101 J54 29 i Internal stake elimrnatirbg roller 0T 4 1 0 5 1 I When PW l RV O deaner moves forward When PW o RV l deaner moves in reverse PC0 I I while M26 is rotating alternates between 1 and 0 When sTMup o sTMDN o liner mcvss 4 when STMUp l STMDN 1 Qler mews dcwl When O LA1 turns ON ...

Страница 52: ...7 1 HVDCEN K 6 _3 HVDC K I 5 _ 4 HVAC K 4 _5 HVDCEN C 3 _6 HVDC C 1 _ 6 HVAC C 1 zb HVT34 LPCB _A 1 24V Developing cylinder M J4703R J 4702R 2 J2217A 7 1 4 0 I i HVDCEN M I HVTM R PC0 _ IWhen 1 respective high voltage is generated IWhen l respective high voltage is generated When 1 respective high voltage Is generated When 1 respectlve h gh voltage IS generated Figure 3 124 3 24 COPYRlOHT81897CANO...

Страница 53: ... Counter 5 4 CNT 5 12 I Counter 6 1 CNT6 I_ 13 _ DC controller PCB iVACEN iVSRD When 1 stray toner collecting high voltage is generated 24V 3 HVSPAC HVSPDC HVSPEN When I separation high voltage is generated 24V 1 HVPRF When l pre fixing high voltage 1s generated h 24V f CNTl D When l CNTl turns ON CNT2D When 0 CNT2 turns ON CNT3D When 6 CNT3 turns ON CNT4D When 0 CNT4 turns ON CNT5D When 6 CNTL tu...

Страница 54: ...um starts to rotate and initial potential control will start when the potential on the drum has become stable when the drum has made a l 2 rotation When the fixing temperature reaches 1 lO C a transfer belt home position search is executed at the end of which image position correction will start l The term fixing temperature means the surface temperature of the fixing roller reading of the ther mi...

Страница 55: ...e surface tem perature of the upper fixing roller has reached 110 C until it reaches 180 C E x e c u t e s irn rection and i control age posraon cor nitial potential STBY standby From the end of INTR until the Copy Start key is pressed or the power switch is turned OFF Waits until a control key e g Copy Start key is pressed Table 3 101 COPYRIGHTO 1997CANONINC CANONCLClOOO REV lMAY1997 PRlNTEDINJAP...

Страница 56: ...velops and transfers specific colors LSTR last rotation From the end of COPY until the main motor stops Discharges copy paper Stabilizes the photosensitive drum sensitivity Removes charges from the transfer belt and cleans the drum Table 3 102 l The machine s scanner becomes ready for operation when the temperature of the fixing roller reach es a specific value so that the image of the original ma...

Страница 57: ...e CCD Figure 3 201 shows a cross section of the original exposure sys tem and Figure 3 202 shows its exterior view mp m m mv mw _ Original exposure system i _ _ _ _ _ _ _ _ _ _ _ _ _ _ Figure 3 201 Scanner motor M29 No 2 mirror mount Scanner home position sensor Ps37 Figure 3 202 COPYRIOHT Q 1997 CANON INC CANON CLClooO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPDN 3 29 ...

Страница 58: ...h Pre Scanning 1 scan over original standard mode Copy Start key ON V I CNTR l With Pre Scanning 2 scans over original standard mode marking Copy Start key ON V I I CNTR Kq Reversal scanner in reverse m High speed rotation m Standard CW rotation Shading correction Original position detection black original detection AE measurement 0 Original scanning Marking area scanning Figure 3 203 330 COPYRIGH...

Страница 59: ...d is home position Table 3 201 The original scanner home position sensor turns on l At power on l At start of copying l At end of original scanning l During CCD adjustment service mode PS37 v l m m iI HP I I I I I HP search at power on I I I Shading correction Original leading edge 8mm 7 A T Start position E Original Original detection Original scan Figure 3 204 COPYRIGHT Q 1997 CANON INC CANON CL...

Страница 60: ..._ _ _ Figure 3 205 2 Operation The microprocessor Q651 on the scanner motor driver PCB receives mode distance and reproduc tion data from the image processor PCB Then in response to the start command it sends drive pulses to the scanner motor to suit these data units The scanner motor is a 5phase stepping motor the direc tion and the speed of scanning are varied by changing the order of the drive ...

Страница 61: ...ding from line memory enlargement The reproduction ratio in the sub scanning direction is changed by moving the mirror mount fast reduc tion or slowly enlargement Scanner motor M29 Scanner home position detection signal SCHP Scanner home position sensor PS37 anner motor driver PCB Reader controller PCB Figure 3 206 COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU...

Страница 62: ... J131 RelayFILl Rectifier circuit 1 Fu Switching 0 w circuit t I J1305A J12 t 7 LAERR 5 a 6 LAON 4 Lamp regulator c g drive circuit E g 9 LINT 3 E d 24V 5 1 0 2 t I I I 11 I I Lamp ON detection circuit 7 z 0 u s v f Thermal TP 6 J135 switch 175 Scanning lamp LA5 Figure 3 207 2 Operations a Turning ON OFF the Scanning Lamp The lamp regulator drive circuit turns OFF when LAON O causing the intensity...

Страница 63: ... OFF thereby cutting off the power to the lamp regulator caution I i The thermal switch TPS is used on a DC line and its contact is subject to damage upon activation Do not re use it once it became activated otherwise its operation will be unpredictable l r X I X II Pr X I _ _ _ II PI c Controlling the Intensity of the Scanning Lamp The intensity of the scanning lamp is determined by the level of ...

Страница 64: ... of PCBs used to process digital video signals image processor PCB memory PCB Preview Monitor Board Original exposure system c _ I I Image processing system _ _ _ _ _ _ __ I I I Digital video signal I CCD line sensor I c R G B I I I I I Preview Monitor Board IP memory PCB I Laser exposure system I r I I Image processor PCB 1 I I I F k s gna ED board Al I I I I i _ _ j i I I_____ _______ __ __ J Fi...

Страница 65: ...erated by the analog processor PCB and stored temporar ily in the transfer block single line then they are synchronized with the clock pulses generated by the analog processor PCB and sent to the CCD in sequence Filter Light receiving block Transfer block Front Rear 6 5 4 3 2 1 Figure 3 302 The transfer block and the output block of each line sensor consist of an odd channel and an even channel Cl...

Страница 66: ...nalog video signal S 8 c F z G digital video signal I ODD EVEN I 3 8 Gain correction B analog video signal c c ODDEVEN c CLWSP a Figure 3 304 The analog video signals from the CCD driver are subjected to gain correction and offset correction specifically the output voltages in the absence of light are made even offset correction and the ratio of amplification is made constant to even out the photo...

Страница 67: ...rovided as standard Compresses and stores images single A3 page max ED Board Al option The installation of this PCB enables the following image processing 9 Framing l Blanking l Original type selection l Gradation l Color filter l Base color l Color conversion l Coloring l Text processing l Texture l Special effects l Area processing l Freehand l Text composition Interface Motherboard provided as ...

Страница 68: ...mage processor PCB area processing text composition The communication with an external device e g IPU IPU II is by way of the interface Board Bl B2 which also corrects color space The Preview Monitor Board converts the YMCBk signals to which all image processing has been made into RGB signals for transmission to the CRT Diaital imaae orocessina _ e __ _ _ I _ _ __ __ _______ _ __ __ _ I I I I I I ...

Страница 69: ...ge e converted to RGB signals Preview Monitor Board The image signals from external _ devices are stored in memory without compression i i I I i I If text synthesii text data read from the I I original I I I I II w J i I Y M C Bk __ _ _ i revent confusion COPYRIGHT Q 1997 CANON INC CANON CLCl OOr 341 ...

Страница 70: ...late and determines the correction Standard white plate Bar code target value See Reference 1 Scanning lamp CCD Figure 3 307 b The CCD measures the light reflected by the standard white plate and generates data repre senting the measurement Standard white plate Bar code Copyboard glass Scanning lamp CCD Figure 3 308 c The shading correction circuit compares the measurement data step b against the ...

Страница 71: ...I I I I R I Line memory I I I I I 1 I I I I I I G I I Line memory c I I I I I I I Scanning direction I I I I I I B I_________ _________ Ekl control circuil CCD Figure 3 310 Figure 3 311 _4V j _ The delay iir 8 image signals Is maximum at 400 enlargement in other word the d image sl nala are delayed for 64 lines and the G image signals are delayed for 32 lines For Instance at 320 enlargement the R ...

Страница 72: ...copiers so that only the area where there is an original reflects the light of the scanning lamp to the CCD l Area with an original Copybard cow r 17Original 1 COPyboed Ql Area without an original I 1 Figure 3 314 Figure 3 315 In general most originals are white paper so that the area identified as being white during scanning can be assumed to represent an original In other words a rectangle or sq...

Страница 73: ...ror image in relation to the main scanning direction Address 12345676 P 9 In zk 3 nnn 2 l 1 pixel 1 byte Writing Reading 1 Figure 3 316 Figure 3 317 e Input Masking When light reflected by an original is separat ed into three colors by color separation filters RGB it would be ideal if each filter let through light of a specific range of wavelengths and blocked out light of other wavelengths 500 60...

Страница 74: ...ure 3 319 Imya from scanner 1 Image B image A R G B I I R G B IP memory PCB r ____ I t 1 1 I t I I 7 I I I Image lntagratim i Image memory I I R G B I I I I I I I 1 I I I t I I _____________ _I i lmagas A B I r__ __ _____ ____J lmaga procaasoor PCB Figure 3 320 In the case of full integration image A which has been read by the scanner first is stored in the image memory first and integrated with i...

Страница 75: ... and continuous density areas of an image are distinguished enabling reproduction of naturally emphasized edges in dotted areas 2 Line Width Identification In this block the width of the area text to which a specific pixel belongs is identified thereby enabling reproduction of naturally emphasized edges suited to the thickness of characters 3 Edge Detection In this block the position of a specific...

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Страница 77: ...n if the level of the R G and 6 sig nals is 200 or more Figure 3 324 255 200 I 255 200 _ I o_a 0 _ __ B G R Background pixel Figure 3 324 Background level adjustment in user mode has two sub modes mode A and mode B each using a different method of correction In mode A only background pixels are processed the color of the background is removed by correct ing the level of the RGB signal of the pixel...

Страница 78: ... is executed as shown in Figure 3 326 CCD output Output level A 225 255 Black VIhite Original density Input level 265 Figure 3 325 b BGR YMC Conversion The circuit generates Y M and C signals tak ing advantage of the fact that B G and R light are complementary to Y M and C toner Transmission through filter 500 600 Wavelength nm Figure 3 327 Figure 3 326 Y M C B Absorbed Reflected Reflected G Refle...

Страница 79: ... where dark and light patterns repeat in low density are called low frequency components Within image data the frequency components of dotted areas fall between 5 0 and 7 0 lines mm the output gain is lowered for such components thereby evening out the dotted components and preventing moire Figure 3 330 This processing is executed for the dotted areas extracted by the previously discussed text ext...

Страница 80: ... of the line scanning each pixel on the original See Table 3 302 for how the ratios are varied as it is and read as it is Table 3 302 b Enlargement Correction Processing The image data is corrected so that the difference in density between pixels will not vary excessively when producing enlarged copies Figure 3 331 shows image data of an original image data at time of enlargement and image data af...

Страница 81: ...l generated in relation to the ITOP signal and sent to the image processor after the UCR pro cessing block has generated the Bk signal The image signals from an external device are subjected to UCR processing without compression and sent to the image processor PCS For this the DRAM memory kit must be installed Image from external device IP memory PCB 1I m a g e compyion 1 i Text signal u r t Image...

Страница 82: ...erated as follows The gray components of the YMC signals are as indicated in Figure 3 333 These gray components are removed and replaced with the Bk signal The replacing com ponent used here is called an UCR amount and in the case of Figure 3 334 the UCR amount is 100 In such a case Bk toner will be added to all density areas possibly causing fogging in light areas As a remedy the UCR amount is in...

Страница 83: ...or the G and the B components segments enclosed in Figure 3 336 In other words M toner if left as it is would tend to have color reproduction characteristics that include the Y com ponent and C toner would have color reproduction characteristics that include the M and the Y compo nents c Y A lGQ 400 500 600 700 t B G R Figure 3 336 For this reason reproduction of red by mixing Y toner and M toner ...

Страница 84: ...set to weak Setting sharpness to strong will emphasize changes in the density of images making the copy images crisp Black 255 1 200 I 1 pixel Black 255 Black 255 100 200 100 White 0 Main scanning direction 0 A f t e r o u t p u t White 0 White 0 I Main scanning direction Figure 3 337 Input Level Main scanning direction Figure 3 338 Sharpness Mode Set to Weak Figure 3 339 Sharpness Mode Set to Str...

Страница 85: ...d by a color palette color data will be read from the bit map memory to represent the selected pixels on the image The area data represents areas on the original to be edited and selected c o l o r Area data Image A I ED Board Al 3 58 i Bit map d lta generation71 1 Smoothing I 1 1 it Bit map memory 1 I Color conversion Color data registered color selected from the color palette In the bit map memo...

Страница 86: ...e 3 341 In the case of text composition image A which has been read by the scanner is converted into bina ry data by the ED Board Al then bit map data is generated based on the area data The bit map data is temporarily stored in the bit map memory and integrated with image 9 which has been read next I Ifnags A Image B ____ _rjr__ ___ J__________ j _ c___ I Ted dmla t cQnvwbd Ihb blIllry data I 8 8...

Страница 87: ...Text photo mode As indicated in Figure 3 343 either a dark or light curve will be selected to suit the settings of items from a through d If text mode is selected for item e a curve that enables reproduction of dark text without risking fog ging will be seiected Figure 3 344 3 60 Copy density Original density Figure 3 343 Copy density Original density Figure 3 344 COPYRIGHT 8 1997 CANON INC CANON ...

Страница 88: ...om the con trol panel The calibration serves to bring the printing output and the display image on the CRT closer to each other by varying the image density signals In the image editing block the image data is rotated shifted or enlarged as specified on the control panel The area image generation block generates image data for such items as an area frame to be displayed on the CRT the initial data...

Страница 89: ... for M in Figure 3 401 which Is synchronized for main and sub scanning directions by the video controller are converted by the laser driver into laser drive signals that represent the level of the signals The laser beam is generated by the laser unit using this laser drive signal The laser beam comes to have scanning characteristics in a specific direction because of the polygon mirror which rotat...

Страница 90: ...n Figure 3 402 Laser unit for C 1 Laser unit for Bk F Reflecting mirror 0 Laser unit for M for Y Laser unit for Y Figure 3 402 Since the positions of the laser units and the direction of rotation of the polygon mirror differ for MN and C Bk the laser beam scans the photosensitive drums in the opposite directions as shown in Figure 3 403 Front Figure 3 403 COPYRIOHT 0 1997 CANON INC CANON CLClOOO R...

Страница 91: ...the Copy Start key is pressed and is PWM acti vated in relation to the image leading edge signal to form a latent image on the drum The PWM activa tion period is given a delay for each color to make up for the distance between drums When the PWM activation for a single scan ends the laser turns fully for BD signal detection the next scanning operation starts when the BD signal is generated Power s...

Страница 92: ...ner motor ready signal SMRDY goes O indicating to the DC controller that the con dition is normal if the rotation speed of the motor deviates because of an error SMRDY goes I dis playing error code El 10 on the control panel Laser scanner motor driver S M R D Y SMON Speed control circuit 1 I I DC power supply PCB Figure 3 405 Laser scanner motor COPYRIQHT 0 1997 CANON INC CANON CLClOOO REV 1 MAY 1...

Страница 93: ...l As can be learned from Figure 3 406 as many as four BD detection PCBs are used to deal with the four colors and the BD signal is gen erated for each channel BkBD PCEl Figure 3 406 In reference to the BD signal for each color the video signal is synchronized for the main direction on the video controller PCB details follow and sent to the laser driver PCB Video controller PCB Y M C Bk 3 66 Figure...

Страница 94: ...synchronized for the sub scanning direction based on the ITOP signal and are subjected to gamma correction based on the conversion table in the density correction RAM See Density Correction Of the video signals after density correction the Y and the M signals are sent to a special memory for synchronization in the main scanning direction Since the main scanning direction for the C and the Bk video...

Страница 95: ... on the BD signal for Y M C and Bk In the sample shown in Figure 3 410 the Y main scanning sync signal YSYNC is generated in sync with the Y BD signal YBD the read enable signal YRE is generated after a specific period of time following the generation of YSYNC and the Y video signals are read from the memory for the main scanning direction May be changed used for image position correction explaine...

Страница 96: ... When the ITOP signal is gener ated the read enable signal for each color YMRE in the case of Figure 3 411 causes the video signals YMCBk to be read from the page memory area for transmission to the video controller As can be learned from the timing chart the read enable signal for each color is given a delay for the distance between drums The video signal is forced to remain 0 until the print are...

Страница 97: ...along the correction curve Figure 3 414 thereby bringing the output characteristics closer to the ideal characteristics Image density 255 Correction curve ideal characteristics Video signal input 255 u Video slgnal 255 Figure 3 414 The correction curve for conversion is stored in the density correction RAM on the video controller in relation to the data for SALT and PASCAL See discussions on the i...

Страница 98: ...n ning direction to generate video signals vldea contmller PCB Figure 3 416 Address data for test patterns is generated in response to the ITOP signal and addresses are assigned in the RAM for gamma correction The selected video data is read from the RAM and sent to the laser dri ver For how to generate the test patterns and sample images see the Service Handbook COPYRlQHTQ1897CANONINC CANONCLClOO...

Страница 99: ...drive signals for 400 lines 200 lines 266 lines 2 Turns ON OFF the laser 3 Selects activation mode Laser Power Adjustment PCB 1 Monitors laser intensity 2 Generates activation current 3 Detects errors in activation current Laser driver PCB 8 I 1 f 1 L 266lines Signal generation for 200 lines I L 1 Modesignal t Laser power adjustment PCEJ I I I I i Laser beam l E r r o r slgnal I 2 Activation curre...

Страница 100: ...t temperature the intensity at the point of activation is monitored at all times and the acti vation current is controlled so as to maintain a specific intensity The laser power adjustment mechanism used when servicing the CLClOOO varies the activation current by volumes VRl and VR2 on the laser power adjustment PCB thereby properly setting the upper and the lower limits of the intensity If a corr...

Страница 101: ...Displacem t in main scanning direction Displacement in sub scanning direction Discrepancy in reproduction ratio Slant Yl Feeding direction Discrepancy in main scanning direction Feeding direction 3 74 4 Feeding direction Discrepancy in sub scanning direction Feeding direction Discrepancy in reproduction ratio Figure 3420 Angle COPYRIGHT 0 lg97 CANON INC CANON CLCltttM REV 1 MAY 1997 PRINTED IN JAP...

Страница 102: ...each color by the CCD for reading patterns Using the M pattern for reference analyzes each pattern to determine the degree of discrepancy using the CPU on the DC controller Prepares correction data based on the results of analysis and imposes feedback on each factor CCD control PCB for correction I I 1 LEDON I DC controller PCB LED control Video controller I Figuru 3 421 COPYRIGHT 0 1997 CANON INC...

Страница 103: ... creating regular images for copies As shown in Figure 3 422 patterns are formed along the front and the rear ends in the order of Y C M and Bk and forwarded to the CCD for pattern reading Rear C drum M drum Ydrum Image poslion correction pattern Transfer belt Figure 3 422 The Y M C and Bk patterns are as shown in Figure 3 423 Reading CCD IT I 6mm I r L I 4mm 1 Figure 3423 3 76 COPYRIOHT 0 1997 CA...

Страница 104: ...ng directions The coordinates of the center of the pattern is computed based on the data In the case of Figure 3 425 the center in the main scanning direction is the 128th pixel and that in the sub scanning direction is the 130th line CCD array I r Feeding direction I 1 III Accumulated value Figure 3 425 256th pixel 128th pixel 0th pixel COPYRIGHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRIN...

Страница 105: ...hotosensitive drum to drum distance and pattern interval of 7 mm for the C and Bk patterns see Figure 3 427 Thereafter the Y pattern is formed as soon as the photosensitive drum completes a half rotation When a total of i sets of patterns have been made Y M C Bk the average of the data values is computed the The reading by the CCD is synchronized with the periods of time that pass following the ge...

Страница 106: ...ive motor remains on for 5 set to move the shutter to the open position After reading eight sets of patterns the shutter drive motor remains on for 5 set once again to move the shutter to the closed position Y M C Bk Y M C Bk 1 St se1 8th set Figure 3 429 If the shutter open sensor dose not detect the light blocking plate when the shutter must open while the motor is at rest E194 0001 will be indi...

Страница 107: ...rrection is made by changing the tilt of the image position correction mirror thereby changing the scanning angle of the laser beam Figure 3 431 In the case of Figure 3 430 the image position correction mirror is rotated in the direction shown in Figure 3 431 so that the scanning angle will be horizontal 3 80 Feeding direction Front Figure 3 430 Laser unii osition correctlon mlrror Figure 3 431 CO...

Страница 108: ... is made by shifting the image position correction mirror horizontally thereby changing the length of the optical path for the laser beam Figure 3 433 In the case of Figure 3 432 the length of the optical path is increased thereby increasing the width of scanning Figure 3 432 Polygon mirror Image position correction mirror JI I P l j d a ipffb I I 1 Yedrum I I I I I Image positlon I comcHon mirror...

Страница 109: ... i 1 Feeding direction Figure 3 434 The correction is made by changing the read timing Tl in Figure 3 435 for the Y C and Bk video sig nals In the case of Figure 3 434 Tl is extended thereby delaying the start of the Y image Y BD signal YBD Y main scanning direction sync siyal YSYNC Y read enable signal YRE I t I ED delecilon PCB Figure 3 435 Video controller PCB Clock generatlon CRE BkRE I YRE MR...

Страница 110: ...ition will be advanced until it is the correct position Y l Feeding direction1 Correct center Y Figure 3 437 The correction is made by varying the read enable signal for the Y C and Bk video signals T2 of Figure 3 438 In the case of Figure 3 437 T2 is extended to delay the timing for the Y image start Image leading signal ITOP F I Y read enable signal YMRE iT2 I 1st page Y print enable signal YPE ...

Страница 111: ...rs Environment Sensor Measures the temperature humidity inside the machine Corrects the grid bias separation charg ing bias and transfer blade bias Potential Sensor Measures the photosensitive drum surface potential Corrects the grid bias and developing bias Color Toner Density Sensor Measures the toner density in the developer Supplies color toner SALT Sensor Measures the toner density on the pho...

Страница 112: ...y toner collection electrode plate 4 HVT4 Supplies a DC AC bias to the separation charging unit 5 HVT5 Supplies a DC bias to the pre fixing charging unit The external static eliminating roller is grounded in relation to the internal static eliminating roller For details see the appropriate pages 1 Pre fixing assembly Pre exposure lamp DC AC bias Developing cylinder DCbiasF F External static elimin...

Страница 113: ...ch ON 18O C I 7 i7 Copy Start key ON i 7 V 1 NfvlUPfl 1 STBY CNTR I COPY 1 LSTR 1 STBY I I Drum motor Separation charging bi Pm fixing charging bias I I I For developing bias DC AC DC Figure 3 503 3 66 COPYRIOHT 0 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAWN ...

Страница 114: ... provides an image stabilizing control mechanism When the power switch is turned on the appropriate grid and developing biases are deter mined with reference to the data from the potential sensor during copying the grid bias is corrected based on the data from the environment sensor The grid bias and the developing bias are corrected and the laser output is corrected based on the cor rection data ...

Страница 115: ...ias is determined each time the Copy Start key is pressed thereby correcting changes over time potential correction 1 PowersjitchON 1 I 1 I Corrects grid bias Vg I Potential control I I t t Figure 3 506 See the pages that follow for details of each control mechanism The timing of control is as follows Initial Potential Control l If the temperature of the fixing roller is 110 C or less when the pow...

Страница 116: ... Video signals set to OOH and FFH vg VdWL characteristic shown in Figure S 508 computed based on measurements Grid bias Vg and developing bias Vdc computed so as to obtain selected contrast potential 7 Contrast potential computed by PASCAL Copy Start key ON VL I Vgl 3OOV Vg2 7OOV Figure 3 507 Figure 3 508 Subsequent copying operations are executed using the grid bias and the developing bias determ...

Страница 117: ...arget value of the grid and developing biases in the case of Figure 3 5111 Vi and V2 are target values Potential negative VI Figure 3 510 WC _ __ eJ0 j__ j VL Gtld bias v2 Figure 3 511 The measurement data for the surface potential may be checked in service mode 1 Operation inspection mode FUNCTION 1 8 Photosensitive drum potential measurement EPC Item Description Reference voo 3oov Surface potent...

Страница 118: ...n error code associated with drum surface potential control The CLClOOO executes drum surface potential control during multiple initial rotation at power on and determines the grid and developing biases for each color with reference to the measurements taken and the pre determined contrast potential The detail codes of E061 are explained below according to procedure for drum surface potential Con ...

Страница 119: ...Pre exposure lamp faulty Pre primary primary charging assem MY faulty HV2 PCB faulty xx11 xx12 xx13 VDI is 90 V or more and in addition VD2 is 900 V or more VDl is 200 V or less and in addition VD2 is 600 V or less VDl is 150 V or less and in addition VD2 is 300 V or less Primary charging assembly faulty HV2 PCB faulty Laser power adjustment faulty Laser unit faulty Video controller PCB faulty VDN...

Страница 120: ...er output excessive puted based on Grid plate faulty measured value xx28 VFF is lower limit 0 V or more xx30 VDi is upper limit 400 V or more xx31 VDl is lower limit 200 V or less xx32 VD2 is upper limit 800 V or more Photosensitive drum deterioration xx33 VD2 is lower limit 500 V or less Laser power adjustment faulty Laser unit faulty xx34 VLl is upper limit 200 V or more Video controller PCB fau...

Страница 121: ...vironment To make up for the changes the density of the density pattern formed on the photosensitive drum is measured by the SALT sensor and the toner supply period is corrected based on the resulting measure ments DC controller Transfer belt Figure 3 514 Dens v oattem Y 1 yTnsitive dNm A Fulcrum Photo diode for direct light lntenslty measurement Figure 3 515 3 94 COPYAIOHT 1997 CANON INC CANON CL...

Страница 122: ...es 1st f Density v measurement for SALT Figure 3 516 The SALT sensor measures the density of toner and computations are made to find out whether the current toner density is higher or lower in comparison with the ideal density The results of computations are used to correct the toner supply amounts for the upcoming cepying operations Copy Start key Copy Start key ON ON I v COPY LSTR STBY 1 COPY LS...

Страница 123: ... 518 Figure 3 517 Referring to the halftone area of the generated Test Print 1 check for differences in density and faults in images if an error is found make adjustments according to the Basic Image Adjustment Procedure If no error is found operate so that the reader unit reads the solid images The data collected by reading the solid images on the Test Print is used to determine the contrast pote...

Страница 124: ...corona wire and the pre primary corona wire and the grid bias is controlled by the control signal from the DC controller The change current for the primary corona wire is constant and the grid bias is varied to control the drum surface potential DC controller PCB Figure 3 520 COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAWN 3 97 ...

Страница 125: ...mbly The output of the primary corona current is monitored with reference to its current and the data is fed back to the variable width pulse oscillator thereby ensuring that the primary corona current remains con stant If an overcurrent because of leakage or example is detected the OC signal forces off the pulse out put When such occurs the primary corona current will remain OFF for 20 ms and the...

Страница 126: ... 522 12v 1 11v ov I I 2OOV 950v Grid bias Figure 3 522 The output of the grid bias is monitored with reference to its voltage and the data is fed back to the current control circuit The feedback signal is used to ensure a specific level of grid bias If an overcurrent is detected because of leakage for example the OC signal will turn on CM thereby forcing off the pulse output When such occurs the g...

Страница 127: ...ated by the transformer 1 The pulse output drives the transformer Corona current that suits the voltage of HVPPR is generated The output of the pre primary current is monitored with reference to its current value and the data is fed back to the variable pulse oscillator circuit The feedback signal is used to ensure a specific level of pre primary corona current If overcurrent because of leakage fo...

Страница 128: ...er mode l When 5000 copies have been made since the previous cleaning operation Cleaning pLcl Primary charging wire cleaning motor M24Bk C M Y Figure 3 525 When the control signal from the DC controller is M24FW l M24RV O the primary charging wlre cleaning motor M24 is rotated clockwise for about 13 set then when M24FW 0 M24RV l the motor is rotated counterclockwise for about 13 sec This sequence ...

Страница 129: ...loping assemblies infrared light is shone on the toner layer on the developing assemblies and the reflected light is measured to determine the amount of toner to supply on the other hand in the case of the Bk developing assembly video signals representing the Bk component and the output of the SALT sensor are used to compute the amount of toner to supply See Measuring Color Toner Density and Measu...

Страница 130: ...igure 3 528 Both DC and AC biases are controlled by control signals from the DC controller for application The DC bias to the stray toner collecting electrode is generated by the high voltage transformer 3B and sent in response to control signals DC controller PCB I I Control signal 4 n HVTBA HVT3B V Transformer for l kV ii Y l k V 1 l k V HVT3A Ifl Transformer for DC 1kV q 1kV Transformer for 1 k...

Страница 131: ... 1 Transformer drive signal HVON l and developing AC bias enable signal HVACEN l 1 The transformer is driven and l kV is sent to the AC bias generation circuit 1 An AC bias is generated based on signals from the timing generation circuit When the AC bias output signal HVAC i the AC bias is applied to each developing cylinder DC controller PCB Transformer for 1 kV I I II Tlmlng slgnal generatlon 1 ...

Страница 132: ...o suit the voltage of HVDC and is applied to the developing cylinder I The DC bias output signal HVDC and the developing bias enable signal HVDCEN have four chan nels for each color and each of the four channels is controlled independently The changes in the developing DC bias according to different shown in Figure 3 530 voltage values are as 4 2oov 75ov Developing DC bias Figure 3 530 COPYRIQHT Q...

Страница 133: ...able width pulse oscillator circuit turns ON and pulse output is sent to the transformer The transformer is driven 1 A DC bias is applied to the stray toner collection electrode 4 The output of the stray toner collection DC bias is monitored with reference to its current value and the data is fed back to the variable width pulse oscillator circuit This feedback ensures a constant level of DC bias ...

Страница 134: ...e density on the developing cylinder cannot be mea sured The video signals carrying a Bk component are counted to find out the image density thereby com puting toner consumption When copying operation ends the SALT sensor measures the toner image on the photosensitive drum to find out the toner density DC controller PC0 SALT sensor Figure 3 532 See Figures 3 533 and 534 for sequences used to measu...

Страница 135: ...he carrier will absorb it In other words when the amount of toner decreases because of consumption over time the reflection of infrared light will decrease because of the changing toner carrier ratio of the developer Using an infrared diode the toner carrier ratio is computed from the intensity of the infrared light reflected by the developer on the f developing cylinder Detection of Reflected int...

Страница 136: ...he density with reference to the difference between the initial value and the measured value of the reflected light Figure 3 537 In the case of the M developing assembly the LED ON signal LEDON turns on the LED inside the sensor The LED intensity is kept to a specific value by controlling the current to the LED so that the inten sity of direct light FIEF M level remains the same By comparing the r...

Страница 137: ...L M Toner layer reflection intensity 700 to 912 700 to 912 SGNL C REF Y REF M Toner layer reflection intensity Surface activation at full activation Surface activation at full activation 700 to 912 377 to 848 377 to 848 FIEF C I Surface activation at full activation I 377 to 848 Table 3 505 3 110 COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTEO IN JAPAN IMPRIME AU JAPON ...

Страница 138: ...developing cylinder is rotating after mea suring the density of toner The duration of toner supply i e during which the toner supply clutch remains on varies depending on the toner density signal Toner level signal TS4 TSS TSG I Toner level detection signal YTEP MTEP CTEP I rror detection sensor TSl TS2 TS3 Error detection slgnal YTEP MTEP CTEP Toner supply clutch Toner supply signal CL1 D CL2D CL...

Страница 139: ...on the control panel Toner level sensor _ _ _____ _ __ ___ Figure 3 540 The rear sensors error sensors TSI 2 3 look for sensor faults or damage to the stirring rod If an error sensor TSl 2 3 detects the absence of toner while the toner level sensor TS4 5 6 detects the presence of toner E020 will be indicated on the control panel when copying operation ends 3 112 COPYRIQHT Q 1997 CANON INC CANON CL...

Страница 140: ...ignals carrying a Bk component As shown in Figure 3 541 the video signals from the image processor are counted to obtain a cumulative count by the video data counter L Video controller PCB Y M C Bk Video signal c signal Y M C Bk L Bk toner supply clutch upper 0 CL4 Bk toner supply clutch lower 0 CL5 Toner supply signal 4 Cumulative count 1D C c o n t r o l l e r Figure 3 541 COPYRIOHT 0 1987 CANON...

Страница 141: ...anges in the LED intensity over time or caused by changes in ambient temperature are corrected in the same way as for color toner Since the window of the sensor tends to become soiled with stray toner correction is made for the dirt on the window also The LED is turned on during last rotation Detection of direct light PhotosensitIve drum after the Copy Start key is turned ON and the Direct lntenst...

Страница 142: ...set for the reflected light and the direct liaht 1 I 1 Performed when replacing the developer or sensors After copying operation post rotation starts During copying operation the density is measured with reference to video signals To prevent disrupting toner images I LED turns ON I I A density pattern is formed on the ohotosensltlve drum I 1 the reflected Ii ht s nal are read 1 The directTs l and ...

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Страница 232: ...st print mode I 1 6 1 COUNTER Counter mode Table 3 1101 Starting and Selecting Service Mode You cannot start service mode while the CLCl 000 is making copies 1 Press the q key on the control panel 2 Press the IZi and i keys keypad at the same time 3 Press the q key l The screen shown in Figure 3 1101 appears Ending Service Mode Press the Reset key M s R P F Figure 3 1101 COPYRKWT Q 1997 CANON INC ...

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Страница 243: ...xXx XxXx XxXx XxXx I Item I Description I Remarks WINDOW Indicates the window soiling correction coefficient Normal if between 60 The value decreases when the SALT sensor becomes and 140 soiled 3 216 COPYRIGHT 8 1997 CANON INC CANON CLClOOO AEVV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 244: ...potential 800 control VFF Y M C K Indicates the target value for VL with laser output at off Indicates the optimum value computed by potential control Unit V Optimum value 50 to 300 VDC Y M C K Indicates the target value for Vdc developing bias DC Unit V component Optimum value 200 to Indicates the optimum value computed by potential 650 control VG YlM ClK Indicates the target value for Vg grid bi...

Страница 245: ...rks The value is indicated only after executing FUNC CCD AU TO ADJ Thereafter the value will not be indi cated at power on off BOARD B G R Indicates the output of each CCD when the standard Initial value 211 white plate is read output value after A D conversion TARGET B G R Indicates the shading target value Initial value 233 BOF B G R Indicates the output of each CCD when the scanning lamp is off...

Страница 246: ...x 801002H xxxxxux 802002H xxxx xxx 800003H x xxxxxx 8 0 1 0 0 3 H xxxxxxxx 802003H xxxxxxxx 800004H xxxxmmx 801004H xxxmxxx 802004H xxxxxxxx 800005H xxxxuxx 801005H xxxmxxx 802005H xxxxxxxx m Item 800000H I 808004H 2 Description Indicates the input ports of the DC controller PCB 800000H through 808004H Remarks COPYRIOHT 8 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPO...

Страница 247: ...olding tray drive motor PLL error Error 1 4 J2226 Al Waste toner feeding motor PLL error Error 1 3 J2213 A5 Fixing motor PLL error Error 1 2 J2208 61 Scanner motor PLL error Error 1 1 J2226 A13 Drum motor PLL error Error 1 0 J2213 A8 Pick up motor PLL error Error 1 3 2 2 0 COPYRlOHTQ1997 CANONINC CANONCLClOOOAEV 1 MAY1997 PRINTEDINJAPAN IMPRlMEAUJAPON ...

Страница 248: ...82 Transfer unit connection 2 J2224 A2 Holding tray unit connection 1 J2223 B12 Fixing knob connection 0 J2209 A14 Fixing assembly connection Connected 0 Connected 0 Connected 0 Connected 0 Connected 0 Connected 0 COPYRIQHT 0 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON NO2 3 221 ...

Страница 249: ...sor 2 PS31 4 J221 l A9 Holding tray paper sensor 1 PS30 Paper present 0 Paper present 1 3 J221 I Al 1 2 J221 l 85 1 J2218 Bl 0 J2218 A16 Delivery sensor PS34 jam detection Internal delivery sensor PS35 jam detec tion Separation sensor PS15 jam detection Registration rear paper sensor PS14 jam detection Paper present 1 Paper present 0 Paper present 1 Paper present 1 801002H 7 6 Reserved Reserved I ...

Страница 250: ...3 OPERATIONS AND TIMING m NO4 COPYRIOHT 8 1997 CANON INC CANON CLClOOO REV 1 MAY lQQ7 PRINTED IN JAPAN IMPRIME AU JAPON 3 223 ...

Страница 251: ...ensor upper TS4 Below 1 2 J2212 B12 C toner level sensor TS3 1 J2212 811 M toner level sensor TS2 Below 1 Below 1 0 J2212 810 802002H 7 Y toner level sensor TSI Reserved Below 1 I I 6 I Reserved I I I 5 I Reserved T 4 3 J2209 Al4 2 J2209 Al2 Reserved Upper fixing web length sensor PS36 Fixing oil level sensor OSI Web absent 1 Oil absent 1 1 J2223 810 Waste toner lock detecting switch SW4 Locked 0 ...

Страница 252: ...d 0 1 2 1 J2219 82 I Transfer belt edge sensor 1 front PS17 I Detected 0 I I 1 J2218 A6 1 Transfer belt lifter sensor 2 PS13 Down 1 I I I I I I I I 0 J2218 A5 Transfer belt lifter sensor 1 PS12 up 1 I I I I 802004H 1 7 1 J2241 4 I Pattern reading CCD shutter rear I Closed 1 I I 6 J2241 7 Pattern reading CCD shutter front 5 4 3 2 For factory For factory For factory For factory 802005H 1 0 7 For fac...

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Страница 263: ...PSl Pick up vertical path 1 sensor PS21 Pick up vertical path 2 sensor PS25 Pick up vertical path 3 sensor PS26 Registration rear sensor PS14 Separation sensor PS15 Internal delivery sensor PS35 Delivery sensor PS34 Delivery vertical path sensor PS38 Delivery vertical path sensor 2 PS32 Duplexing unit reversal sensor PS33 Holding tray front feeding sensor 1 PS8 Holding tray front feeding sensor 2 ...

Страница 264: ...XXX HISTB EXXX HIST 4 Exxx Item Description CODE Indicates the appropriate error code E for the results of self diagnosis EOOO EOi 2 E020 E030 E040 E061 E072 E073 Indicates detail codes for each error code See the descriptions on self diagnosis HIST O 1 HI 9 Indicates a history of error codes E HIST 0 is the most recent ERA CLR Clears all error code histories 1 COPYRIQHT Q 1997 CANON INC CANON CLC...

Страница 265: ...Moving I T M ERR Indicates an error in the mechanism that moves the tray 1 Error T HP ERR I Indicates a tray home position error 1 Error I T L MOVE indicates that the tray is moving local T POS Indicates the position of the tray 1 Moving 0 Home position 1 Increases by 1 L MOVE Indicates that the lens is moving 1 Moving I Indicates the state of motor excitation I 1 Excited L POS Indicates the posit...

Страница 266: ... controller PCB 01 Hequivalent of E401 02H equivalent of E402 03H equivalent of E403 04H equivalent of E404 05H equivalent of E405 06H no corresponding error 07H equivalent of E411 11 H equivalent of E411 21 H equivalent of E400 JAM For R D ALARM l 2l3 4 Indicates the alarm code sent by the RDF controller PCB 01 H re circulating bar idle rotation 02H not used 03H separation failure 04H separation ...

Страница 267: ...ing stationary jam 03H staple jam 04H power on jam 08H door open jam during feeding 09H door open jam other than during feeding ALARM l 2 3 4 Indicates the alarm code sent by the sorter controller PCB ALARM l 02H overstacking ALARM 2 02H staple jam 03H stapler safety mechanism activation 04H stapler overstacking 05Hmixed paper sizes horizontal 07H stapler unit absent 08H separation failure 0AH sta...

Страница 268: ...the sensor Mos ent data 9 Second most recent data y Third most recent data _ r Indicates the time required by the transfer belt Unit 0 1 set between when it reaches the transfer belt end sensor I PS17 front and when it reaches the end sensor 2 PS18 rear fvlos e t data 3 p Second most recent data Third most recent data x x x x BST Indicates the time required by the transfer belt Unit 0 1 set betwee...

Страница 269: ...ird most recent 4 B TO F C Time Indicates data B TO F data minus BST data time Unit 0 1 set taken by the belt to move from back to front B TO F C Time second most recent T third most recent TOTAL indicates data F TO B data plus B TO F data tjme Unit 0 1 set taken by the belt to make a round trip 3 242 COPYRlOHTQ1 97CANONINC CANONCLClOOOREV 1MAY1997 PRINlEOINJAPAN IMPRIMEAUJAPON ...

Страница 270: ...adation correction control a ADJ MISC ADJ MNISC adjustments other than above 9 1 FEED ADJ I Adjusts the feeding position 1 ForR D 10 1 REG OFS 11 1 ENV SET 1 Use it to set cassette heater operation conditions 12 I HV TR Y M C K I Fine adjusts transfer high voltage output by condition 13 1 HV SP Fine adjusts separation high voltage output by condition 14 HV FS Use it to make fine adjustments for th...

Страница 271: ... copyboard glass Unit Pixel 1 oo l OO 2 5 2Smm Unit 0 06mm approx l Follow the instructions on the next page ADJ S Note 1 Use it to fine adjust the point at which the standard o 45 white plate is measured for shading correction data O 4 8mm l Unit Number of steps of the stepping motor Unit 0 11 mm approx l Scratches or dirt if any on the standard white plate can cause conspicuous vertical white li...

Страница 272: ... and press the Copy Start key 2 0 ADJ Y 20 __I The appropriate copying modes will be set automatically and a copy will be made with a I shift of about 20 mm as shown in Figure 3 ti 704 If any part of the image is missing decrease the values of ADJ X and ADJ Y If an area outside the image is copied increase the values of ADJ X and ADJ Y Figure 3 1104 COPYRKiHT 8 1997 CANON INC CANON CLClOOO REV 1 M...

Страница 273: ...al detection You may enter any value as the slice level for original detection A higher value increases detection capabili ty but tends to lead to wrong detection DS DOC When detecting ordinary originals DS PRJ When detecting the projection area with the projector in use DS 0HP When detecting film 6x6 8x10 placed on the copyboard glass with the projector in use from the position of the reference s...

Страница 274: ...ea if original detection mecha 300 300 nism is off with the projector in use or if original detec 19 0 19 0mm tion fails when the original detection mechanism is on Ref 0 For XSiXE 4 Unit 0 11 mm approx For YSNE __ Unit 0 06 mm approx On copyboard glass x s XE On copy XE x s COPYAIBHT 0 1997 CANON INC CANON CLClOW REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 3 247 ...

Страница 275: ... 6 3 6 3mm detection mechanism is off in copyboard mode l The area for the standard value 0 is 5 mm inside Unit 0 06mm approx the Fresnel lens XS XE 10 9 10 9mm Unit 0 11 mm approx on copyboard glass Reference 0 P JCAR X PJCAR Y Use it to adjust the film reading range when the origi Settings 100 to 100 nal detection mechanism is off with the auto changer Standard 0 in use 3 248 COPYRWT Q 1997 CANO...

Страница 276: ...d values mm converted values In ut coordinate adjustment value for sub scanning direction direction from the Editor EDADJ X i I L _ _ _ _ _ _ _ _ _ i 1 ZDA J_Y 99 99 12 6 12 6mm Unit 0 13mm approx Reference 0 LOOP MB Note 1 Changes the processing method used to read images O 3 into memory for coloring in area specification color Standard 0 creation If the value is increased filling gaps will be ea...

Страница 277: ...MRK TH Note 1 Adjusts the slice level for binarization used for reading o 255 images into memory for freehand point specification Standard 128 If the value is increased finer lines may be read Note 1 You must enter the appropriate value whenever you have replaced a PCB or initialized a RAM record any new values on the service label for this purpose 3 2 5 0 COPYRIOHT 8 1997 CANON INC CANON CLClOOO ...

Страница 278: ...ning direction when pick up is from the RDF tray DX For correction in sub scanning direction when pick up is from the manual feeding tray feeding assembly DY For correction in main scanning direction when pick up is from the manual feeding tray feeding assembly I RX I DX o 99 o 99 Unit RX DX O l 1 mm approx RY DY O OGmm approx Initial value RX DX O RY DY O For this mode you must have finished 1 Ad...

Страница 279: ...C VCONT K XxXx XxXx XxXx XxXx ADJUST VBACK Y VBACK M VBACK C VBACK K XxXx xmx XxXx XxXx mmm Item Description I Remarks VCONT Y M C K Indicates the present value of the target contrast potential VBACK Y M C K Indicates the present value of de fogging potential 3 252 COPYRIOHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 280: ...low density increase the setting Use it to make fine adjustments so that the hues will be closer to the hues of offset printing After comparing M C Y K outputs against profession ally offset printed material if the print out is lighter increase the setting of P TBL M C Y K if the print out is darker decrease the setting of P TBL M C Y K Settings 8 8 Standard 0 t Darker Lighter 16 16 Standard Y O M...

Страница 281: ... contrast potential obtained by auto gra dation correction control M C Y K DMAX Indicates in the result of comparing the solid black density read when auto gradation correction is execut ed against the design value Settings Set it to 0 when adjusting images otherwise be sure to set it to 1 Standard 1 Optimum value 75 or higher M C Y K Indicates the control value obtained from M Y K VRATE DMAX used...

Страница 282: ...ch color obtained auto gradation cor rection control 0 Do not use 1 Use LUTCT Y M C K Use it to specify whether to use the gradation correc Standard value 1 tion control data of each color auto gradation correc tion control 0 Do not use 1 Use P OFST Y M C K COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 3 255 ...

Страница 283: ... 310 00 295 00 315 00 380 00 7 295 00 275 00 290 00 370 00 8 245 00 225 00 225 00 330 00 I Fine adjusts the separation level between text and photo in text photo mode or text halide mode Identifies photos better Identifies text better Use it to correct the target value of the SALT signal If fogging is noted only for Bk increase the setting to suppress Remarks l 8 are used for checks normally set i...

Страница 284: ...ition in main scanning direction when pick up is from the multifeeder Adjusts the image write start position in main scan ning direction when pick up is from the paper deck Adjusts the image write start position in main scan ning direction for re pick up operation Adjusts the image write start position in sub scanning direction Remarks A higher value leads to a movement to the rear Front Unit 0 11...

Страница 285: ...railing edge of 1 the images IREG LP Use it to adjust the degree of arching copy paper at the rear of the registration roller copy paper stop tim ing 9 A higher setting will increase the arching l Too low a setting can cause skew movement 3 258 Remarks A higher value increases the non image width R B L Unit 0 062 mm Standard L 32 R 32 T 40 B 40 Settings 0 to 255 Unit 0 Standard value 0 Settings 6 ...

Страница 286: ...LAY Indicates the machine internal humidity measured by ANALOG the environment sensor Indicates the machine internal humidity absolute value g measured by the environment sensor Indicates the present environment Sets ON OFF of the cassette heater The heater will turn on if the internal humidity absolute value exceeds the setting Sets to OFF for all environment The settings of ENV SET are stored as...

Страница 287: ...dicates the machine internal humidity absolute value g measured by the environment sensor TRY OFS Y M C K Adjusts the transfer high voltage output Same as the reading under DISPLAY ANALOG Settings 5 to 5 Unit 1 O uA Standard 0 ZONE A B C Indicates the machine internal humidity absolute value g in the three ranges of A through C Note 1 The setting of this item will return to the default value when ...

Страница 288: ...5 to 5 or on the 1st side or on the 1st side The setting of this item will return to the default value when the PCB is replaced or the RAM Is cleared requiring input once again Be sure to record any new setting you have made on the service label Rafarcsnce This mode will prove effective when correcting transfer faults under each item In queStiOn COPYRIGHT 0 1997 CANON INC CANON CLClOOO REV 1 MAY 1...

Страница 289: ...Same as the reading under DISPLAY ANALOG BODY g Indicates the machine internal humidity absolute value g measured by the environment sensor SP OFST Adjusts the transfer high voltage output Settings 5 to 5 Unit 25 pA Standard 0 ZONE A B C Indicates the machine internal humidity absolute value g in the three ranges of A through C I I Note 1 The setting of this item will return to the default value w...

Страница 290: ...ck paper mode and in addition copyin on a one sided copy or on the 1st side of a two sidecp copy Effective in thick paper mode and in addition copying on the 2nd side of a two sided copy Effective in ultra thick paper mode and in addition when copying on the 1st side of a two sided copy Effective in ultra thick paper mode and in addition when copying on the 2nd side of a two sided copy Effective i...

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Страница 292: ...ition when copying on the 2nd side of a two sided copy Effective in special paper 3 mode and in addition when copying on a one sided copy or on the 1st side of a two sided copy In special paper 3 mode and in addition when copy ing on the 2nd side of a two sided copy The setting of this item will return to the default value when the PCB is replaced or the RAM is cleared requiring input once again B...

Страница 293: ...es the machine internal humidity measured by the environment sensor BODY g Indicates the machine internal humidity absolute value g measured by the environment sensor EL OFST Adjusts the transfer high voltage output Settings 5 to 1 Unit 0 5 kV Standard 0 ZONE A B C Indicates the machine internal humidity absolute value g in the three ranges of A through C Note 1 The setting of this item will retur...

Страница 294: ... mode and in addition 1 when copying on the i st side of a two sided copy EL UT2 1 Effective in ultra thick paper mode and in addition when copying on the 2nd side of a two sided copy EL S1 1 Effective in special paper 1 mode and in addition when copying on a one sided copy or on the 1st side of a two sided copy EL S1 2 Effective in special paper 1 mode and in addition when copying on the 2nd side...

Страница 295: ...otosensitive drum potential measurement 10 BLADE 11 FUSER Transfer blade transfer belt cleaning blade operation Fixing assembly related adjustment 12 CST AD 13 F MISCs Cassette paper width adjustment Reader related operation inspection 1 4 1 F MISCp 1 Printer related operation inspection 15 TCLN 16 P THICK Polishing roller oil removing roller operation Paper sensor adjustment 17 1 IMG REG I Image ...

Страница 296: ... be indicated on screen 3 4 Record it to the service label Reads the initial value of the toner density signal SGNL REF of the ATR and SALT sensors in sequence l The value will be indicated on screens 3 4 and 414 Record it to the service label Reads the initial value of the SALT signal SGNL REF of the specified color l The value will be indicated on screen 414 Record it to the service label Reads ...

Страница 297: ...00 however do not execute auto gradation cor rection as yet 3 Execute FUNC INSTALL 2nd page NLSE K in service mode about 1 min 4 Check to make sure that PASCAL in ADJUST PASCAL in service mode is 1 5 Execute auto gradation correction in user mode REG APER Executes auto correction of the read in coordinates of the image position correction pattern RECV Y M C K Rotates the cylinder of the developing...

Страница 298: ...n the label Figure 3 702 Indicates the value of the toner density reference sig nal when INIT is executed as ATR control Be sure to record the reading on the label Figure 3 702 For SGNL M SGNL C and SGNL Y normally 818 41 SIGG YAK Indicates the gain value gain value used to set SGNL M SGNL C SGNL Y to 818 for the toner densi ty signal during ATR control Be sure to record the reading on the label F...

Страница 299: ... the SALT signal Be sure to record the reading on the label Figure 3 1102 REF S Y M C K Indicates the value of the SALT reference signal Be sure to record the reading Figure 3 l 102 SGNL D Y M C K Indicates the value of the light reflected by the photo sensitive drum Be sure to record the reading Figure 3 1102 SIGG S Y M C K Indicates the value of the gain for the SALT signal Be sure to record the...

Страница 300: ...um value of Q1301 on the read er controller PCB Indicates the check sum value of Q1305 on the read er controller PCB Indicates the check sum value of Q1308 on the read er controller PCB Indicates the check sum value of Q1312 on the read er controller PCB Indicates the check sum value of Q1315 on the read er controller PCB Reserved Remarks The main switch will automatically turn off when RAM CLR is...

Страница 301: ...U on the DC con troller PCB is powered requiring you to turn off the main switch and dis connect and then con nect the power plug after executing RAM CLR CHK SUM Starts a check of the ROM on the DC controller PCB i e totals the data in RAM DCCON 1 DCCONP Indicates the check sum value of Q2341 on the DC controller PCB Indicates the check sum value of Q2340 on the DC controller PCB Indicates only wh...

Страница 302: ...r paper width detection reference point 2 for cassette 1 Enters the adjustment value for paper width detection reference point 1 for cassette 2 Enters the adjustment value for paper width detection reference point 2 for cassette 2 Enters the adjustment value for paper width detection reference point 1 for the multifeeder Enters the adjustment value for paper width detection reference point 2 for t...

Страница 303: ...f the toner density signal when INIT is executed as ATR control Remarks REF Y M C Enters the value of the toner density reference signal when INIT is executed as ATR control SIGGY M C Enters the value of the gain for the toner density sig nal during ATR control gain used to set GNL M SGNL C and SGNL Y to 818 3 276 COPYAIOHT 8 1997 CANON INC CANON CLClDOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU ...

Страница 304: ...F S Y M C K Use it to enter the value of the SALT reference signal SGNL D Use it to enter the value of the signal representing the Y M C K intensity of light reflected by the photosensitive drum SIGG S Use it to enter the value of the gain for the SALT sig Y M C K nal PT OFST K Use it to enter the adjustment value of the density pattern for SALT PUDT U L Use it to enter the adjustment value for pi...

Страница 305: ...sor set at time of shipment from the factory SNSR RNK Enters the characteristics of the paper thickness sen The values A through E sor to be installed newly change by toggle opera tion Y C K OFST Use it to enter the offset value for the image position correction pattern Do not enter any values other than those on the service data sheet POTOFSTYY M Use it to enter the offset value for the potential...

Страница 306: ...d obtained from the bar in sequence code data recorded on The display changes as follows BRADY Bar the standard white plate code OeAdj Offdj LampAdj GainAdj OeAdj InitBAdj Gz bar LAMP Use it to indicate the level adjustment value of the scanning lamp TARGET Use it to display the shading adjustment correction value target value of point B BLUE Use it to indicate the data of BLUE GREEN Use it to ind...

Страница 307: ...CCD GAIN BLUE I Indicates the data for blue of the balance level I GREEN 1 Indicates the data for green of the balance level I I I I I RED 1 Indicates the data for red of the balance level I I I Indicates the value for gain level adjustment of the CCD BLUE Indicates the data for blue of the gain level GREEN Indicates the data for green of the gain level RED Indicates the data for red of the gain l...

Страница 308: ... 1 min A press on the PRJ LAMP key turns it off Adjusts the gain for the CCD and reads the appropri ate data for installation work Adjusts the target value for shading when making copies of negative film using the film projector l A higher value will make the images darker B Y G M R C Adjusts the target value for shading correction when making copies of positive film using the film projector l A l...

Страница 309: ...nt Turns ON the laser output for laser power maximum value adjustment Turns ON the laser output for laser power bias value adjustment Turns ON the laser output corresponding to VOO to check VOO in text mode Turns ON the laser output corresponding to VOO to check VOO in photo mode Turns ON the laser output corresponding to VOO to check VFF in text mode Turns ON the laser output corresponding to VOO...

Страница 310: ...ned data into memory Use it to execute skew removing operation twice when Use it if thick paper tends pick up is from the multifeeder tray effective only to move askew when the paper type is set to thickest 0 Remove skew by registration roller 1 Remove skew by registration roller and feeding roller PK ADJ D Use it to start automatic pick up from the paper deck Use the mode if a dis and to obtain t...

Страница 311: ... A4kTR paper for the point of retention mode Source of paper 1 Upper cassette 2 Lower cassette 3 Paper deck 4 Multifeeder 5 Duplexing pick up assembly Starts operations according to the settings under ATT SLCT and stops automatically with copy paper retained on the transfer belt 3 284 COPYRIGHT 0 lM7 CANON INC CANON CLClOOO REV 1 MAY 1697 PRINTED IN JAPAN IMPRIME AU JAf UN ...

Страница 312: ...djustment on the potential measurement circuit of the photosensitive drum The potential measure ment data is used for the next copying run Indicates the photosensitive drum surface potential when the grid bias potential of the pri mary charging assembly is 300 V and the laser output is VOO Approximate value 250 350 Indicates the photosensitive drum surface potential when the grid bias potential of...

Страница 313: ... blade l Press BLD SLCT enter a number on the keypad and press the m key Remarks BLD ON Transfer blade Transfer clean ing blade 1 In contact Off contact 2 Off contact In contact 3 In contact In contact Starts operation according to the settings under BLD SLCT In 10 set the blade will take off contact position 3 286 COPYRIOHT 0 1997 CANON INC CANON CLClOIM REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU...

Страница 314: ...mperature value upper roller If you have replaced the fixing assembly enter the value recorded on the label attached to the fixing assembly Thereafter be sure to turn off and then on the power switch Use it to adjust the fixing temperature value lower roller If you have replaced the fixing assembly enter the value recorded on the label attached to the fixing assembly Thereafter be sure to turn off...

Страница 315: ...ference point 2 for cassette 1 LOW A4R Executes automatic adjustment of paper width detection reference point 1 for cassette 2 LOW STMR Executes automatic adjustment of paper width detection reference point 2 for cassette 2 MF A4R Executes automatic adjustment of paper width detection reference point 1 for the multifeeder MF A6R Executes automatic adjustment of paper width detection reference poin...

Страница 316: ...y Starts a check on the scanner Each press on SC MOVED changes the nota tion and the operation as follows Notation Operation o 4 HP A m l 4 A B 2l4 B C 314 C HP H P rA B C I 40 SC MOVE FILT IMG Starts an output check on each CCD RGB When the Copy Start key is pressed with a color original on the copyboard glass the CCD output for R G and B will be copied on sepa rate sheets in cyan mono The operat...

Страница 317: ...om D Frame Erase E Color Create F Page Separate G Shift H Image Create I Freehand J Area Select K Synthesize L User Mode M Cover N Transparency Insert 0 Start START Pre Heat STAND BY Interrupt INTERRUPT Clear CLEAR ID ID Call CALL 3 290 COPYRIQHT 8 1997 CANON INC CANON CLClOW REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 318: ...ut put Press the Stop key to stop operation MTR Use it to select the type of check on the motor 00 to 18 Enter a number on the keypad and press the See the details section OK key M FIT ON Use it to start a check on the motor Press the Stop key to stop the operation FAN Use it to select the type of check on the fan Enter a number on the keypad and press the OK key 00 to 19 See the details section F...

Страница 319: ...motor and the solenoid thereby moving the cam to the posi tion selected under BUFF Be sure to set BUFF i and execute BUFF ON after the check E075 RLS Use it to clear E075 After execution check to make sure that the transfer belt is at the correct position then turn off and then on the power switch SHUT OFF Use it to check the operation of the auto power off mechanism I 3 292 COPYRIQHT 8 1997 CANON...

Страница 320: ...eb take up solenoid SL3 39 D_ xing unit paper deflecting plate solenoid L 14 Fixing web releasing solenoid SL4 40 Duplexing unit paper deflecting plate solenoid M SLllM 15 Fixing oil pump drive solenoid Sl2 41 e rg unit paper deflecting plate solenoid S I I I I I I 16 1 Separation claw releasing solenoid SL15 1 42 1 Buffer SL I I I 17 1 SALT sensor shutter SLl7Y M C Bk 1 43 1 Buffer flapper SL I I...

Страница 321: ...A develop ing bias MDC 370 V output OFF pre expo sure OFF photosensitive drum motor OFF 3 Primary C charging assembly grid C out Transfer lifter DOWN photosensitive drum put auxiliary high voltage Y 350 FA motor ON pre exposure ON primary C output developing bias CDC 370 V output grid C output 500 V auxiliary high voltage output C 350 uA developing bias CDC 370 V output IB Waits for a stop command...

Страница 322: ... toner high voltage output toner high voltage output ON Waits for a stop command or 60 sec Developing bias Y AC DC output anti stray toner high voltage output OFF 7 Developing bias M AC DC output anti Developing bias M AC DC output anti stray stray toner high voltage output toner high voltage output ON Waits for a stop command or 60 sec Developing bias M AC DC output anti stray toner high voltage ...

Страница 323: ...s for an equivalent of 2 rotations and stops 8 Ml 1 pre fixing feeding motor Note 1 Rotates for IO set at standard speed 138 mm set for plain paper 64 to 104 g for 10 set at standard speed 90 mm set for thick paper 157 g for 10 set at standard speed 68 mm set for ultra thick paper 209 g for 10 set at gloss speed 45 mm see for ultra thick paper 209 g and stops for 3 sec 9 Buffer path unit motor Not...

Страница 324: ...ps for 3 set and then moves to home position 23 M28 duplexing unit reversal motor Rotates for draw in operation for 3 set rotates for feed out operation for 3 set stops for 1 set rotates for draw in for 3 set rotates for feed out for 3 set and then stops 24 Ml6 upper cassette lifter motor Rotates for lifter up operation for 3 set and then stops Return the lifter by hand 25 Ml 7 lower cassette lift...

Страница 325: ...n on for 5 set and stops 4 Pre fixing feeding fan FM7 high speed rotation On for 5 set off for 5 set then on for 5 set 5 Pre fixing feeding fan FM7 low speed and stops rotation 6 Delivery assembly cooling fans FMl 2 FM2 3 FM3 high speed rotation 7 Delivery assembly cooling fan 1 FMl 2 FM2 3 FM3 low speed rotation On for 5 set off for 5 sec then operates contin uously 8 Delivery lower cooling fan 1...

Страница 326: ...fer belt The operation operating for a specific will stop after last rotating sequence for about period of time 4 min During operation the notation is P SERVICE OCLN Butts the oil removing roller against the transfer belt and rotates both the transfer belt and the oil removing roller for about 4 min During operation the notation is P SERVICE COPYRIUHT Q lM7 CANON INC CANON CLMOOO REV 1 MAY 1987 PR...

Страница 327: ... Indicates the output characteristics of the paper thickness sensor set at time of shipment from the factory SNSR RNK Enters the characteristics A through E of the paper thickness sensor to be installed newly Values A through E change by toggle opera tion 3 300 COPYAlOHTO1997 CANON INC CANONCLClOOO REV lMAY1997 PRlNTEDINJAPAN IMPRIMEAUJAPON ...

Страница 328: ...main scanning direction A higher setting shifts the pattern to the rear 1 pixel 63 5um Settings 0 to 255 Standard 128 Y C K REG HS Y C K REG V Use it to correct the write start position of the pattern for Y C K fine adjustment in main scanning direction Use it to correct the write start position of the pattern for Y C K sub scanning direction chlutlqn Unit l 4 pixel Settings 0 to 3 Standard 0 A hi...

Страница 329: ...ets El94 will be indicated If any of the sets is 0000 its data will be used for correction 0 016A 4 bit data is assigned to each color data and a 1 is assigned where an error exists front sub scanning rear main scanning rear sub scanning In the case of the above an error exists on the pattern for C of set 1 at front in sub scanning direction and at rear in main scanning direction 3 302 COPYRIQHT 0...

Страница 330: ...ng mode transfer drum stop position 3 REMOTE Sets conditions for connection with an external controller 1 4 1 DECK Sets conditions for connection with a paper deck I I 5 DATA CON Use it to disconnect the copy Data Controller Al COPYRIOHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1897 PRINTED IN JAPAN IMPRIME AU JAPON 3403 ...

Страница 331: ...e indicated on the user mode screen Remarks 0 AB configuration 1 Inch configuration 2 A configuration 3 All Standard 0 0 Not available 1 Available Standard 1 standard 0 For fine adjustment see the descriptions for AJDUST COL ADJ P TBL M C Y K Note 1 You must enter the appropriate value whenever you have replaced reader controller PCB or initial ized a RAM record any new values on the service label...

Страница 332: ...uency at which the fixing web solenoid turns on once for n of small size copies Settings l 255 Standard 8 CONTSET Note 1 Use it to set the copy count at which copy count Settings O 999 should start Standard 100 For instance if set to loo the counter 3 will start to count in response to a press on the The setting is effective Copy Start key as long as the copy count is set only if DISPlAY VER to 10...

Страница 333: ...ther copying modes set in local state should be maintained when moving from local state to remote state C Determines whether to retain copying modes set in local mode when switching from local to remote mode A B Keep as Call key Retain Keep as Call key Do not retain Use as Remote key Retain Use as Remote key Retain Use as Remote key Do not retain Use as Remote key Do not retain You must enter the ...

Страница 334: ...ced the reader controller PCB or ini tialized a RAM record any new values on the service label for this purpose 5 DATA CON disconnecting the Copy Data Controller Al Item B CLR Description Connecting the Copy Data Controller Al will E717 will be indicated If automatically sets it to 1 ou separate the Copy Be sure to set it to 0 when temporarily separat bata Controller Al with ing the Copy Data Cont...

Страница 335: ... 0 Text mode 1 Photo mode 2 Auto switching Not valid if TYPE is set to 6 grid Each press causes the following sequential change Switches the gate array of the laser controller PCB Not valid if TYPE is set to 5 halftone 0 Use gate array 1 Do not use gate array Each press causes the setting to alternate between 0 and 1 3 308 COPYRIQHT Q 1897 CANON INC CANON CCC1000 REV 1 MAY 1997 PRINTED IN JAPAN IM...

Страница 336: ...r mode l Be sure to return the setting to 0 after gener ating the test print DENS M C Y K COLOR Y M C K Selects the density of each color for full face halftone for PGTYPE 5 Use it to select the color to generate for each PG 1 Generate 0 Do not generate O 255 Standard 126 Standard value 1 Be sure to set TYPE back to 0 when leaving test print mode COPYRIDHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY ...

Страница 337: ...is pressed after the item has been highlighted the counter reading of the item will return to 00000 Check the value of Level 3 item 038 whenever you have replaced the cleaning web of the fixing assembly If not 0 press E005RLS under FUSER of FUNC to clear the counter reading In addition executing RAM CLR for the reader controller PCB will reset all readings of the Level 3 items to 000000 except 038...

Страница 338: ...d lnltlatly 270 incremented by 1 for each actlvatk n Indicates the number of copies to be made Until the 019 Indicates the number of sheets plcked up from the 039 next time the prlmary charging wire automatic dupledng unit cleaning mechanism turns on Inltlally SOOG count down by 1 per copy 020 Indicates the number of scans made by the scan ner 040 Indicates the number of copies to be made UnUl the...

Страница 339: ...f and on the main switch 16 Execute auto gradation correction and set 3 OPERATIONS AND TIMING PASCAL under ADJSUT in service mode to 1 b When Replacing the Reader Controller PCB lnitialize the RAM on the reader controller PCB See the appropriate instructions Turn off and on the main switch When Replacing the DC Controller PCB Start service mode and check to make sure that DISP BLT DRFT BELTPOS is ...

Страница 340: ... Settings on ED RF screen Settings on COL ADJ screen Settings on ADJ MIS screen Settings on PRJ ADJ screen Settings on R OPT screen Settings of ON SET on R OPT screen Settings on REMOTE screen Settings on DECK screen The above service mode settings are cleared when the RAM on the reader controller is initial ized f 1 g 1 2 3 4 5 When Replacing the Image Position Correction CCD Unit After replacing...

Страница 341: ...switch Remove the multitray covers 1 and 2 Remove the environment sensor from the environment measurement PCB and insert the environment measurement checking tool TKN 0457 in its place Turn on the power switch Set the meter to the 30 VDC range and check to make sure that the voltage of Jl 1 and Jl 2 on the environment measurement PC6 is 24 V 2 4V If not check the DC power supply PC6 DCPl Start ser...

Страница 342: ...de the specification replace the environment sensor 11 Press the Reset key and turn off the power switch 12 Remove the environment sensor calibration tool from the environment measurement PCB and insert the environment sensor 13 Install all covers 3 Checking the High Voltage Control System a Outline lf an image fault occurs you must first deter mine whether the cause is the latent static forma tio...

Страница 343: ...00 380 00 295 00 275 00 290 00 370 00 245 00 225 00 225 00 330 00 3 4 5 Execute EPC under FUNC in service mode Make copies an d check the images If the image is better suspect a fault in the environment sensor or the environment mea surement PCB Return the setting of VONT of ADJ MISC under ADJUST in service mode to 0 3 316 COPYRIGHT D 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IM...

Страница 344: ...given Using Service Mode Start service mode Press DISP Press SENSOR Make checks as indicated I SENSOR S R READY P READY F DlSP m 8 0 0 0 0 0 H XXXXXXXX mm 800001H x x x x x x x x 800002H xxxxxxxx 800003H xxxxnxx 800004H XXXXXXXX I 800005H XxxxxxxX 801OOoH xxxxxxxx 8 0 2 0 0 0 H x x x x x x x x 801001H XXXXXXXX 80200 1 H XXXXXXXX 801002H XXXXXXXX 802002H XXXXXXXX 801003H XXXXXXXX 802063H xxxxxxxx 8...

Страница 345: ...herwise 802002 bit 2 Holding tray J2214B 2 l 1 if paper is present over the holding tray front feeding front feeding sensor sensor 1 l 0 if absent 801061 bit 6 Holding tray J2214B 5 l 0 if paper is present over the holding tray front feeding front feeding sensor 2 sensor 2 l 1 if absent 801001 bit 7 Transfer belt Slide out the transfer unit and open the transfer cleaning web J2218A 7 belt assembly...

Страница 346: ...PS16 802003 bit 6 l 0 when absent Transfer belt J2219B 2 During standby edge sensor 1 front l 1 when the detecting lever is present over PS17 802003 bit 2 l 0 when absent Transfer belt J2219B 3 During standby edge sensor 1 l 1 when the detecting lever is present over PS 18 rear PS19 802003 bit 3 l 0 when absent Transfer belt J2219B 7 During standby l 1 when the detecting lever is present over PS 1...

Страница 347: ...e 2 paper sensor During standby l 1 when the cassette 2 is slid out l 0 when the cassette 2 is slid in J2222B 11 801005 bit 5 I J2224B 8 Duplexing unit stacking guide home position sensor During standby l 1 when the cassette is slid in with paper l 0 when the cassette is slid in without paper PS 29 I 801004 bit 6 Holding tray J2224A 5 i During standby slide out the duplexing unit paper sensor 1 an...

Страница 348: ...g standby remove the copyboard glass position sensor J1306A 5 l 1 when the light blocking plate is put over PS37 Delivery vertical Jzzl 18 8 l 1 when paper is put over the delivery verti PS 38 path sensor 1 cal path sensor 1 l 0 otherwise 801002 bit3 Pattern reading 2241 4 Execute FUNC F MISCp MTR in service PS 39 assembly shut mode to operate the shutter ter closed sen PS39 1 at first 0 when oper...

Страница 349: ...e l COLOR Y M UK 1 selects a color Effective when PGTYPE 2 3 4 5 or 6 Set the density of the test print l Set the density using the DENS Y M C K key Effective when PGTYPE 5 Press the Copy Start key GTYPE Description 0 Image from CCD regular copying 1 For R D 2 256 colors 3 256 gradations 4 i7 gradations 5 Total halftone page 6 Grid 7 For image position correction 8 For R D 9 For R D 10 MCYBk horiz...

Страница 350: ...6x16 frames 3 l 106 from the leading edge of the copy paper represent If the hues are different suspect deterioration 256 colors all frames that follow are repetitions of of the developer deterioration of the photosensi the first set tive drum and mixing of developers Lb 16 frames _ Figure 3 1106 COPYRIGHT01997 CANON INC CANON CLClOOOREV 1MAY1997 PRlNTEOINJAPAN IMPRIMEAU JAPON 3 323 ...

Страница 351: ...lor copying Select 3 color mode and generate a test print to check the gray balance of all densities from density 0 to density 255 You may check the gradation of all densities from density 0 to density 255 Note I e user mode to rn e a op col selection I 1 Lb 16 frames 4 A 3 324 COPYRlGHTQ1997CANONINC CANON CLCiOOOAEV l MAY1997 PRlNfEOINJAPAN IhlPRIMEAUJAPON ...

Страница 352: ...f the gradation of density is not as shown in Figure 3 l 108 suspect a fault in the developing assembly or the laser system b Fogging If fogging is over the section of 00 activation in Figure 3 l 108 suspect a fault in the developing system or the photosensitive drum or the laser may not be adjusted correctly Figure 3 1108 COPYRIGHT 1697 CANONINC CANON CLClOOOAEV lMAYlQQ7 PRlNTEOINJAPAN IhlPRIME A...

Страница 353: ...ing assembly b Black Lines If black lines are noted suspect scratches on the photosensitive drum or dirt on the primary charging wire c White Lines If at intervals of about 0 5 mm suspect the scanner If at intervals of about 38 mm suspect the developing cylinder If at intervals of about 1 6 mm suspect the drive gear Will not occur on test prints occur in one color only suspect a fault in the devel...

Страница 354: ...gular copies b Right Angles Straight Lines If a fault is noted in relation to right angles or straight lines suspect a displaced laser beam or a fault in the beam detection mechanism necessarily mean color displacement on regular copies because of black text processing The mechanisms are normal as long as color dis placement is not noted on regular copies Use this test to find out the location of ...

Страница 355: ...GTYPE 07 Use this test print to check whether the image position correction pattern is normal or otherwise ___ e 3 328 COPYRIGHT Q 1997 CANON INC Y pattern M pattern C pattern Bk pattern Figure 3 1111 CANON CLClllOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 356: ... white lines are noted in the cyan area of the copied image suspect a fault in the developing assembly for cyan c Uneven Density between Left and Right 11 uneven density occurs between left and right for all colors suspect dirt on the butting block and a fault in the height of the primary charging wire d Image Position left right If the position of the cassette holder or the set ting of REG X Y is...

Страница 357: ...n even density over the gray scale To make adjustments use the contrast poten tial b Gradation Check gradation of YMCBk and RGB mono and difference in density c Fogging If fogging is noted in the white area suspect a fault in the developing assembly or the photosen sitive drum or the laser may not be adjusted cor rectly Y M C Y M C Bk Gradatoin of Bk gray scale 1 Y C 1 i Figure 3 1113 3 330 COPYRI...

Страница 358: ...e heater xx 01 upper heater xx O2 lower heater Fixing thermistor short circuit Triac short circuit DC controller PCB faulty xx01 The overheating detection circuit on the DC controller PCB has detected an overheating condition 220 C or more EOOO xx02 The thermistor has detected 210 C or more Fixing thermistor poor contact open circuit Fixing heater open circuit Triac faulty DC controller PCB faulty...

Страница 359: ... value for 0 1 l DC controller PCB faulty set or more l Waste toner feeding motor 0001 The rotation speed of the waste toner faulty feeding motor has deviated from a l Waste toner feeding screw rota specific value for 0 1 set or more tion fault PLL signal 0 l DC controller PCB faulty 0002 The waste toner lock detection switch SW4 has been pressed for 0 1 set or more E014 Fixing motor M9 error The ...

Страница 360: ...r density signal FIEF reference signal l Photosensitive drum deterioration l SALT sensor faulty l Stirring developer inside devel oping assembly faulty l Stray light to sensor no cover front door open xx3A The variation of the following is 47 or more for 5 samplings of the density data when sampling during copying sequence SGNL S Y SGNL S M SGNL S C SGNL S K COPYRIQHT 0 1997 CANON INC CANON CLClOO...

Страница 361: ... higher xx42 When setting initial data upon instal lation for example the value of the following is 255 E020 SIGG S Y SIGG S M SIGG S C SIGG S K xx43 When setting initial data upon instal lation for example the gain of the SALT reference signal for each color is 255 xx45 When setting initial data upon instal lation for example the average value after sampling of the following values is 512 or high...

Страница 362: ...FIEF S M REF S C or the value of REF S K is 464 or lower l SALT sensor fault xx4F The value of SGNL S Y M C K which has been obtained by averag ing samplings during copying sequence is 1008 or more l SALT sensor faulty xx50 When setting initial data upon instal l Stirring developer inside devel lation for example the gain cannot oping assembly faulty be set i e no change is noted in the l Stray li...

Страница 363: ...back up data SGNL S Y SGNL S M SGNL S C F value of SGNL S K is 144 or lower xx86 During copying sequence the initial setting of the following is 336 or lower because of an error in the memory back up data REF S Y FIEF S M REF S C or the value of REF S K is 464 or lower xx87 During copying sequence the value of the following is 0 because of an error in the memory back up data SIGG S Y SIGG S M SIGG...

Страница 364: ...B0 When setting initial data the average after sampling of the following values is 859 or higher SGNL Y SGNL M SGNL C E020 xxB1 When setting initial data the average after sampling of the following values is 859 or higher REF Y REF M REF C xxB2 When setting initial data the average after sampling of the following values is 255 SIGG Y SIGG M SIGG C xxB5 When setting initial data the average after s...

Страница 365: ...setting initial data the values of the following cannot be set SIGG Y SIGG M SIGG C l Toner sensor faulty xxF1 The Y M C hopper error sensor has l Toner stirring screw faulty detected the absence of toner 04F2 The Bk hopper error sensor has detected the absence of toner 10 times or more continuously l Developer deterioration xxD0 The value of the toner supply time l Developing cylinder rotation fa...

Страница 366: ...PLL signal 0 0401 The rotation speed of the Bk develop ing motor Ml 8Bk has deviated from a specific speed for 0 1 set or more PLL signal 0 l Counter open circuit Check immediately before the counter turns l DC controller PCB faulty ON and OFF E030 Normal if the counter drive signal is 0 when the counter turns ON normal if the counter drive signal is 1 when the counter turns OFF Data communication...

Страница 367: ...it motor M8001 has turned ON switch SW8002 faulty l DC controller PCB faulty 0002 l The paper deck lifter lower switch SW8002 does not turn on within 40 set after the paper deck motor M8001 has turned ON l Duplexing unit stacking guide motor M23 faulty l Duplexing unit stacking guide home position sensor PS29 EOSO fau ty l DC controller PC6 faulty 0001 l The duplexing unit stacking guide home posi...

Страница 368: ...f VDl is 5 higher and in addition the rnE ment of VD2 is 900 V or highe l Primary charging assembly faulty l HVDC faulty l Video controller PCB faulty l Laser unit faulty xx11 The measurement of VDl is 9 higher and in addition the rnc ment of VD2 is 900 V or highe xx12 The measurement of VDl is 2 lower and in addition the mei ment of VD2 is 600 V or lower xx13 The measurement of VDl is 1 lower and...

Страница 369: ...he computation value of VOO is the upper limit value 800 V or higher xx21 The computation value 750 V of Vdc is the upper limit value 750 V or higher xx22 The computation value of Vg is the upper limit value 950 V or higher xx23 The computation value of VOO is the upper limit value 950 V or higher l Potential measurement unit xx24 The computation value of Vdc is the faulty lower limit value 200 V ...

Страница 370: ...difference between the computa faulty tion value of Vdc measured previously l DC controller PCB faulty and the computation value of Vdc measured currently is 30 V or more xx51 The difference between the computa tion value of Vg measured previously and the computation value of Vg mea sured currently is 30 V or more Potential measurement unit faulty l HVDC faulty xx52 The computation value of VOO is...

Страница 371: ...n not be detected within a specific peri od of time 20 set The transfer belt home position is detected longer than a specific period of time 2 set The sensor output does not change after a specific period of time 6 set 0001 0002 0003 0004 0005 The connect signal CONNECT of the transfer assembly frame goes 0 when the front door is closed The transfer belt end sensor 4 PS20 and the transfer belt end...

Страница 372: ...he transfer belt end sensor 3 PS19 fault detected the transfer belt l DC controller PCB fault 0004 The transfer belt end sensor 4 PS20 detected the transfer belt l Transfer belt cleaning web taken A load is imposed on the web motor M12 E 0 7 6 because of a shortage of web causing the Web length sensor faulty web rotation sensor PSlO to detect a rota DC controller PCB faulty tion fault El00 l Laser...

Страница 373: ...ontroller PCB 0002 When the main switch is turned on with the front door closed 24 V is not present on the DC controller PCB E260 0003 The thermal switch has detected overheating of the 5V system on the DC power supply PCB 0004 The thermal switch has detected overheating in the 24VR system on the DC power supply PCB 0005 The thermal switch has detected overheating in the 24VU system on the DC powe...

Страница 374: ...f slip clock pulses is below a l Slip sensor Sl 0 faulty specific value for 100 ms E404 l Delivery motor M5 faulty l The number of delivery motor clock pulses l Delivery motor clock sensor is below a specific value for 200 ms S12 faulty l Pick up motor Ml faulty E405 f a u l t y The number of pick up motor clock pulses Pick up motor clock sensor S12 is below a specific value for 200 ms E407 l Pick...

Страница 375: ...motor drive signal has been gener ated ES25 l Bin paper sensor 1 53 S4 auto Auto adjustment of the bin paper sensor 1 adjustment fault S3 S4 cannot be executed or an error has occurred in the auto adjustment value ES26 l Bin paper sensor 2 S6 S7 auto l Auto adjustment of the bin paper sensor adjustment S6 S7 cannot be executed or an error has occurred in the auto adjustment value l Guide bar motor...

Страница 376: ...or drive signal has been generated 20000 ms during ini tialization and 2000 ms otherwise ES40 l There is no clock signal from the clock plate sensor of the motor for 250 ms or more l The input signal from the lead cam position sensor P120 does not change for 2000 ms or more l DC output from sorter controller ES0 f a u l t y l An error has occurred in the DC output 24 VL 24 VP from the sorter contr...

Страница 377: ...DC con Reader unit controller PCB faulty troller PCB and the reader unit controller PCB Power supply PCB faulty is disrupted for 5 set or more Power switch DC controller PCB An interruption in the auto shut off signal is detected foil set or more DC harness Power supply unit DCPl cooling ES04 fan error The rotation of the cooling fan for the power supply unit DCPl has stopped 3 350 COPYRIQHT Q 199...

Страница 378: ...ress E005RLS 3 Turn off and then on the power switch l Clearing E075 1 Start service mode and select F MISCp under FUNC 2 Press E075 RLS 3 Turn off and then on the power switch l Clearing E004 1 Turn off the power switch 2 Disconnect and connect tlie power plug from and to to the power outlet 3 Turn on the power switch COPYRKMT 0 1997 CANON INC CANON CLClOOO REV 1 MAY lQQ7 PRINTED IN JAPAN IMPRIME...

Страница 379: ...I A 1 EXTERNALS AND CONTROLS Covers External Covers and Copyboard Glass q Figure 4 101 A Flgure 4 102A COPYRlQHTQ1 7CANONINC CANON CLClOOOREV lMAY1997 PfUNTEDINJAPAN IMPRIMEAUJAPON ...

Страница 380: ...Hopper upper cover Right door Left door IPU cover Cassette right cover Cassette lower cover Paper deck front cover Paper deck rear cover Paper deck door Paper deck upper cover Multifeeder cover 1 Multifeeder cover 2 Copy tray 2 Internal Covers Figure 4 103A Hopper left cover 1 Counter cover 2 Hopper right cover 1 Hopper lower front cover 4 Transfer assembly right cover 2 Transfer assembly front co...

Страница 381: ... three screws 0 Figure 4 101 B 5 Slide out the hopper assembly to the front Remove the hopper left and right covers 0 Figure 4 1038 Flgure 4 1048 Figure 4 1028 6 Lift the control panel and disconnect the con nector then remove the control panel COPYRlQHT l997CANONINC CANON CLClOOO REV lMAY1997 PRlNTEOINJAPAN IMPAIME AUJAPON ...

Страница 382: ... I Figure 4 101 C 4 Remove the four screws each and remove the fans from the fan unit 3 Removing the Air Filters laser cooling fan FM4 5 1 Remove the multifeeder cover l 2 2 Remove the air filters 0 1 2 Figure 4 l 02C Removing the Laser Cooling Fan Shift up the digital unit Remove the three screws each and remove the fans 0 0 1 0 1 Figure 4 103C COPYRIUHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1...

Страница 383: ...emove the filter cover 0 Flgure 4 10X 1 2 Removing the Power Supply Cooling Fan FM17118 Remove the rear cover l 2 Disconnect the three connectors 0 and remove the four screws 0 then remove the fan mount 0 3 Figure 4 108C Remove the four screws 0 and remove the power supply cooling fan 0 Figure 4 107C COPYRlQHTO1 97CANONINC CANON CLClOOO REV 1 MAYlM7 PRlNTEOINJAPAN IMPRIMEAUJAPON ...

Страница 384: ... 0 Q 3 Figure 4 l 0 1 2 3 4 Removing the Primary Exhaust Fan Remove the rear cover 1 Remove the screw 0 and open the DC con troller PCB Disconnect the connector 0 and remove the two screws 0 then draw out the fan assem bly 0 0 1 Figure 4 11 OC Remove the three screws 0 and remove the fan 0 u Flgure 4 111 C COPYRIQHT 8 1897 CANON INC CANON CLCIOOO REV 1 MAY lQQ7 PRINTED IN JAPAN IMPRIME AU JAPDN ...

Страница 385: ...Disconnect the connectors one each and remove the four screws each then remove the fan 0 3 Remove the three mounting screws a and disconnect the two connectors 0 then remove the fan guard plate 0 n 7 1 2 Removing the Scanner Suction Fan FM12 13 Shift up the digital unit Remove the two screws 0 and shift the ana log processor PCB 0 0 1 Figure 4 113C Flgure 4 115C COPYRIQHT 0 1997 CANON INC CANON CL...

Страница 386: ...e the seven screws 0 and remove the left stay 0 9 1 2 Removing the Digital Unit Cooling Fan FM14 15 16 Removing the Filter Remove the two screws and remove the mul tifeeder cover 1 Remove the filters 0 Figure 4 117C 4 Disconnect the connectors I one each and remove the two screws I each then remove the fan 0 Figure 4 l 19C COPYRIQHT 8 1997 CANON INC CANON GLC1000 REV 1 MAY 1897 PRINTED IN JAPAN IM...

Страница 387: ...o screws 0 then remove the fan 0 10 Removing the Pre Fixing Feeding 1 2 3 Fan FM7 Remove the two screws and remove the counter cover Remove the pre fixing feeding assembly Remove the four screws 0 and remove the fan 0 I Ih Figure 4 122C 11 Removing the Delivery Assembly Lower Fan 1 Remove the left cover 2 Disconnect the connector 0 and remove the four screws 8 then remove the fan stay 0 Figure 4 1...

Страница 388: ...ews each and remove the drum heater terminal cover 0 Figure 4 202A 5 Remove the two screws each and loosen the tensioner plate four points then detach the four belts from the drum drive assembly pulleys Q 5 0 6 Figure 4 203A 6 Disconnect the two connectors 0 and four screws 8 then remove the drum drive assembly I 5 a Flgure 4 204A 4 10 COPYRIOHT 0 1997 CANON INC CANON CLCl 990 REV 1 MAY 1997 PRINT...

Страница 389: ...4 206A COPYRIQHT Q 1097 CANON INC CANONCLCIOOO REV 1MAY1B97PRlNTEOINJAPAN IMPRIMEAU JAPON 4 11 B Developing Motor Assembly 1 Removing the Developing Motor Assembly 1 Remove the rear cover 1 and the rear cover 2 2 Remove the two screws and remove the fly wheel left This applies only when removing the M developing motor assembly 3 Remove the two screws each and discon nect the two connectors each th...

Страница 390: ...s only when removing the M developing motor Remove the four screws each 0 and discon nect the two connectors each 0 then remove the developing motor 0 Figure 4 2036 C Pick Up Drive Assembly 1 Outline See Figure 4 201C for how the pick up drive belt is routed Figure 4 201 C 4 12 COPYRIQHT 0 1987 CANON INC CANON CCC1000 REV 1 MAY 1897 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 391: ...iver PCB together with the support plate Figure 4 202C 3 Loosen the two screws I to loosen the ten sioner plate 0 then detach the drive belt 0 Figure 4 203C 4 Remove the pick up assembly 5 Remove the screw from the pick up relay PCB and remove the two screws from the pick up drive assembly Figure 4 204C COPYRlQHTQ1997 CANON INC CANON CLClOOOREV lMAY1997 PRINTEDINJAPAN IMPRIMEAUJAWN 4 13 ...

Страница 392: ...emove the pick up drive assembly Loosen the three screws 0 and shift the ten sion roller 0 then detach the timing belt from the pulley 0 Remove the four screws 0 grip ring 0 and pulley 0 then remove the pick up motor Figure 4 205C 6 P yyiA a 60 Figure 4 206C 4 14 COPYRIQHT Q lSS7 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 393: ...e the O ring from the scanner motor Figure 4 203D 2 1 3 1 2 3 Adjusting the Belt Tension When Installing the Scanner Motor When tightening the screw be sure that the belt is free of slack i e move the motor to the right Routing the Scanner Cable Keep the mirror positioning tool FYO 3002 000 near at hand when routlng the scanner cable Remove the left cover and the hopper left cover Remove the contr...

Страница 394: ...rarily fixed to the side plates found at the front and the rear of the pulley thereby temporarily fixing the No 2 mirror mount in place Figure 4 204D rear I 1 dn1 Figure 4 206D Figure 4 205D front 6 Route the scanner cable on the pulleys and hooks as indicated in Figure 4 207R Figure 4 207D I Wind 8 times mporarily ball 4 16 COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1097 PRINTED IN JAPAN ...

Страница 395: ...between the No 1 mirror mount and the No 2 mirror mount and insert the pin that comes with the mirror positioning tool Flgure 4 209D Figure 4 21 OD 10 Install the metal fixing J of the scanner cable to the No 1 mirror mount using the hole in the side plate with two screws I Figure 4 211 D Figure 4 212D COPYRIOHT Q 1997 CANON INC CANON CLClOW REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 4 17 ...

Страница 396: ...emove the screw and open the DC con troller PCB Remove the two screws 0 and disconnect the four connectors 0 then remove the fixing motor driver 0 0 1 Figure 4 201 E 4 Remove the five screws 0 and remove the fixing drive assembly 0 Figure 4 202E 4 18 COPYRIQHT Q 1097 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 397: ...e Toner Motor Disconnect the twp connectors 0 and remove the four screws 0 then remove the waste toner motor 0 0 2 Figure 4 201 F 2 Disconnect the connector 0 and remove the four screws 0 then slide out the waste toner feeding assembly to the front while shifting it to the right Figure 4 2021 COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 4 19 ...

Страница 398: ... 4 203F 4 Remove the two screws 0 and pull out the waste toner feeding vertical pipe by shifting it to the bottom Figure 4 204F 5 Detach the Bk developing assembly drive belt 0 6 Figure 4 205F Remove the two fastons of the micro switch and remove the three screws 0 then pull out the waste toner feeding screw drive assembly 8 and the waste toner pipe I toward the right front Figure 4 206F 4 20 COPY...

Страница 399: ...om the rail front rear of the paper deck Figure 4 301 A Removing the Cover Remove the four mounting screws each and remove the paper deck front cover and the paper deck rear cover 0 Figure 4 302A Figure 4 303A 2 Remove the four mounting screws 0 and remove the paper deck top cover 0 GI Figure 4 304A COPYRIQHT Q 1997 CANON INC CANON CM1000 REV 1 MAY 1997 PRINTEO IN JAPAN IMPRIME AU JAPON ...

Страница 400: ...ller shaft install it so that the marking 8 shown in Figure 4 307A is toward the rear of the m a c h i n e 4 1 2 3 4 Rear of machine Figure 4 307A Removing the Pick Up Feeding Roller Remove the four screws and disconnect the connector then remove the paper deck heater Remove the pick up roller from the front Pull out the push lock used to fix the side guide plate left right in place to free the si...

Страница 401: ...ller assembly remove the timing belt 0 and remove the pick up feeding roller assembly Figure 4 312A n Orientation of the Pick Up Feeding Roller The pick up feeding roller rotates in a specific direction When installing the pick up feeding roller install it so that the marking shown in Figure 4 313A is toward the rear of the machine Bearing one way Markings A 0 Rear of machine Figure 4 313A COPYRIQ...

Страница 402: ...the separation roller assembly to remove the separation roller 0 Figure 4 316A n Orientation of the Separation Roller The separation roller rotates in a specific direction 1 2 When installing the separation rubber roller make sure that the marking shown in Figure 4 317A is toward the coupling rear of machine Figure 4 317A When installing the separation roller make sure that the rib provided for id...

Страница 403: ...r double feeding occurs If double feeding occurs decrease the pres frequently change the position of the spring sure hooked on the retard stay results in a pressure change of about o etothe hole Spring Retard stay Increase the pressure Figure 4 319A 50 9 COPYRIQHT Q 1997 CANON INC CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 4 2s ...

Страница 404: ...e surface when the plunger of the pick up roller releasing sole noid is pushed in Mounting ptate Pick up roller I J Surface of copy paper Pick up roller Place one sheet on the releasing solenoid paper deck Adjusting screw Figure 4320A Standard Correct if the paper surface is within the bottom two thirds shaded with reference to the bend angle Figure 4 321 A 4 If the paper surface is not as indicat...

Страница 405: ...n on the power and wait until warm up ends Set the copy count to 1 on the control panel Start service mode and select FUNK P UP TMG Press PK ADJ U Pick up starts from the cassette 1 Repeat the operation two more times Press D SEND U The measurement data will be written to the DC controller Press PK ADJ C Pick up starts from the cassette 9 Repeat the operation two more times 10 Press D SEND C The m...

Страница 406: ... pick up assembly 2 Remove the screw 0 and remove the upper _ _ i i guide 0 d 2 Figure 4 3048 3 Remove the screw 0 and remove the pick up roller arm bushing 0 Flgure 49058 4 20 COPYRIQHT Q 1997 CANON INC CANON CCC1099 RN 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

Страница 407: ... feeding roller from the shaft together with the belt pick up roller shaft Figure 4 3078 COPYRIUHT Q 1997 CANON INC 4 1 2 Removing the Pick Up Assembly Separation Roller Remove the pick up assembly Remove the screw 0 and remove the lower guide 0 Figure 4 3098 CANON CLClOOO REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON 4 29 ...

Страница 408: ...re Remove the pick up assembly Remove the screw 0 and remove the lower guide I I Figure 4 3128 3 If double feeding or pick up faults occur dur ing pick up operation adjust the position of the pressure spring of the separation roller 0 l If double feeding occurs hook the spring on A l If pick up faults occur hook the spring on B Figure 4 311 B Figure 4 3138 440 COPYRIQHT Q 1997 CANON INC CANON CLCl...

Страница 409: ...service mode Select the pick up assembly using ATT SLCT Press ATT ON Copy paper will be picked up automatically and remain attracted to the transfer belt At this time make adjustments so that the dis tance L between the p aper edge front of copy paper and the front plate of the transfer unit is 74 7 kO 5 mm If LTR 83 7 kO 5 mm Slide out the duplexing unit if cassette 1 or the cassette 1 if cassett...

Страница 410: ...8 Removing the Duplexing Pick Up Roller Remove the pick up assembly Remove the E ring resin and remove the pick up roller together with the collar Figure 4318B 4 32 COPYRlQHT 8 1997 CANON INC CANON GLC1000 REV 1 MAY 1997 PRINTEO IN JAPAN IMPRIME AU JAPON ...

Страница 411: ...4 Pull out the feeding roller together with the belt 0 Figure 4 321 B COPYRIQHT Q 1097 CANON INC 11 Removing the Duplexing Feeding Roller 2 1 Remove the pick up assembly and open the pick up assembly door 2 Remove the screw 0 and remove the posi tioning pin 0 3 Remove the registration roller inlet guide 0 Flgure 4 3238 CANON CLCIOOO REV 1 MAY 1097 PRINTED IN JAPAN IMPRIME AU JAPON 4 33 ...

Страница 412: ...e rear to remove gear 0 and remove the feeding roller 2 from the shaft 6 7 Figure 4 3248 Remove the two E rings 0 Shift the two feeding roller 2 bushings toward the inside and remove them together with the shaft Figure 4 3258 Figure 4 3268 4 34 COPYRIUHT Q 1997 CANON INC CANON CLC1999 REV 1 MAY 1997 PRINTED IN JAPAN IMPRIME AU JAPON ...

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