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O P E R A T I O N S A N D T I M I N G

the scanning

the

coronacurrent and

grid bias

A. Outline

the developing

the

density.

the developing assembly and drum

Figure 3-22 shows the construction of the image

cleaning

the blank shutter.

formation system, and the system has the following
functions:

L a m p

G R D O N

d e v e l o p i n g

a s s e m b l y

Figure 3-22

C A N O N I N C .

C A N O N

MAV 1990

IN JAPAN

Summary of Contents for NP-2120

Page 1: ...SERVCE MANUAL for 220 24OV REVN N 2 _ canon DEC 1992 FY8 13AM 020 COPYRIGNI 0 1992CANON ING CANON NPZl20 2020 REY 2 LIEC 1992 PRINTEO IN JAPAN IMPRIME AU JAPONI d L __ _ ...

Page 2: ...fidential in Prepared by COPYING MACHINE TECHNICAL INFORMATION DEPT COPYING MACHINE TECHNICAL INFORMATION DIV CANON INC 890 12 Kashimada Saiwai ku Kawasaki shi Kanagawa 211 Japan COPYAIGHT 0 1992 CANON IHC C A N O N NP212012MO REY 1 J A N 1992 PAINTEU I N JAPAN IIMPAIME AU JAPUNI d ...

Page 3: ...g of operations In CHAPTER 4 MECHANICAL SYSTEM the NP2120 2020 s mechanical system is discussed as to its operation disassembly reassembly and adjustment CHAPTER 5 INSTALLATION gives step by step instructions for installing the NP2120 2020 together with checks to make for each step CHAPTER 6 MAINTENANCE AND SERVICING contains tables of replacement parts and consumables In addition to the above cha...

Page 4: ... Release NP2020 SERVICE MANUAL For 220 24OV The SERVICE MANUAL for the NP2020 has been revised to accommodate the introduction of the NP2120 AH those concemed are hereby requested to discard the old SERVICE MANUAL and use the document attached for purposes for which the document is intended FY8 13AM 02Y P r i n t e d in Japan I m p r i m é au Japon ...

Page 5: ......

Page 6: ... G E L I S T R Replacement S Supplement MODEL NP21 20 2020 D Destroyed Page 1 CHAP rm P A RJZVISION CHAP REVISION GE MAY JAN DEC rm PA GE MAY JAN DEC 1990 1992 1992 1990 1992 1992 1 1 0 1R 3 3 0 1R 3 lo 31 0 t 2 0 t 32 0 ...

Page 7: ...2 1992 3 33 0 1R 3 58 0 t 1R 34 0 1R 35 0 t 36 0 t 4 1 0 1R 37 0 2 0 t 1R 38 0 1R t 3 0 1R t 39 0 t 4 0 1R 40 0 t 5 0 1R f 41 0 t 6 0 1R 42 0 t 70 42a o s so 42b OS 90 43 0 1R 10 0 1R t 44 0 t 1R 11 0 t t 45 0 1R 12 0 46 0 t 1R 13 0 t 47 0 t 47a OS 47b OS 47c o s LS 48 0 t 49 0 17 0 f 50 0 t 18 0 t 51 0 19 0 52 0 t 20 0 P 53 0 t 21 0 t 54 0 1R 22 0 55 0 1R 23 0 t t 56 0 24 0 t 57 0 1R 2R 25 0 ...

Page 8: ...R E V I S I O N P A G E L I S T R Replacement S Supplement MODEL NP2 120 2020 D Destroyed Page 3 20 OS 1R ...

Page 9: ...R E V I S I O N P A G E L I S T R Replacement S Supplement MODEL NP2120 2020 D Destroyed Page 4 23 OS 1R 24 OS 1R 24a OS 24b OS 25 0 t 26 0 27 0 t 28 0 t 29 0 f 30 0 t 31 0 t 1R 32 33 0 34 0 t t ...

Page 10: ... A G E L I S T R Replacement S Supplement D Destroyed MODEL PAPER DECK PEDESTAL Cl Page 5 2 1P 0 2P 0 t 3P 0 4P 0 5P 0 1R 6P 0 t 7P 0 t 8P 0 t 3 1P 0 2P 0 p 3P 0 4P 0 5P 0 t 6P 0 t 7P 0 4 1P 0 A 1P 0 t 2P 0 3P 0 4P 5P 0 ...

Page 11: ...cuitry 3 2 H Blank Control 3 37 C Inputs lo DC Controller 3 4 1 Controlling the Transfer Corona D Outputs from DC Conlroller 3 8 Wire Cleaning Mechanism 3 38 E Basic Sequence 3 I 1 IV PICK UP FEED SVSTEM 3 39 ll EXPOSURE SVSTEM 3 13 A Outline 3 39 A Varying the Reproduction Ratio 3 13 B Identifying the Cassette Size 3 43 B Lens Drive Syiem 3 14 C Fixing Assembly and Delivery C Scanner Drive System...

Page 12: ...IZE 5 8 THE COPIER 5 2 IV SEnlNG THE CT UNIT 5 13 A Unpacking 5 2 V RELOCATING THE COPIER 5 14 B Mounting the Dium 5 4a VI SETTING CONTROL CARD V 5 15 C Checking the Operation 5 5 VII ATTACHING THE DOCUMENT D Adding Toner 5 6 HOLDER 5 I 7 1 PERIODICALLV REPLACED PARTS 6 1 III PERIODICAL SERVICING ___ _____ _ 6 3 ll CONSUMABLES ___ 6 2 IV PERIODICAL SERVICING CHART _ 6 4 1 2 3 4 5 6 7 GENERAL TIMIN...

Page 13: ...a l l y s o r t e d or grouped by page C o n t r o l C a r d V W i t h t h e card the volume of copy work may t e put under watch I Paper D e c k P e d e s t a l Q rl Stapler Sorter B2 Up to 10 sets of copies may be automaiically sorted and stapled Further sorted copies may be automatically stapled COPYRICHT G 1592 CANON INC C A N O N NP2120 2020 REY 1 UEC 1992 PRINTEO IN JAPAN IIMPAIME AU JAPONI ...

Page 14: ...ES I 1 V WARNINGS AND ACTIONS II SPECIFICATIONS 1 2 TOTAKE I 12 III NAMES OF PARTS l 7 VI ROUTINE WORK BY THE USER 1 14 IV OPERATION 1 9 COPYRIGNT 0 1992 C A N O N ING C A N O N NPZl20 2MO KV 0 M A Y 1990 PAINTEU I N JWAN IIMPRIME AU JAPONI ...

Page 15: ...roduction of clear characters and photos The toner is of a single component type which provides stable images In addition a 30 dia high sensitivity OPC drum is used to enable enhanced image reproduction and a compact copier design 4 Man machine interface As many as 21 copies A4 landscape may be made per minute The zoom mechanism allows reduction down to 50 and enlargement up to 200 of the original...

Page 16: ... photocopying Charging Corona Exposure Slit moving light source Copy density adjustment Automatic AE or manual Development Dry Pick up Automatic 2 cassettes multifeeder NP2120 Manual Manual feed tray NP2020 Transfer Corona Separation Curvature and Static eliminator Cleaning Blade Fixing Heat roller 900 W 1 2 COPYRIGHT 8 1992 C A N O N ING C A N O N NPZl20 2020 AN I OEC 1992 PAINTEO IN JAPAN IIMPAI...

Page 17: ... 64 to 80 g1m2 Tracing paper SMI Colored paper Plain paper 64 to 128 g m2 Tracing paper SMI GNT80 Colored paper OHP film Postcard Label NP2020 only Plain paper 64 to 128 g m Colored paper OHP film overlay only Postcard Sheet Book 3 D object 2 kg14 4 Ib max A3 297X420 mm LDG 1 l X17 Claws Front loading 250 sheets approx of 80 g m2 99 sheets 80 g m2 2 0 mmI0 08 in leading edge 2 5 mm O l in left rig...

Page 18: ... I GENERALDESCRIPTION B Others l 4 COPYRIGNT 0 1992 CANON INC C A N O N NPZl20 2MO NH 2 DEC 1992 PRINTEO IN JAPAN IIMPRIME AU JAPONI d ...

Page 19: ...1 1 414 fl O 1 0 865 fl O 1 2 000 kl O 1 1 0 5 1 0 500 1 0 1 1 214 1 0 1 0 647 il O 1 1 294 1 0 1 0 773 l O 1 2 000 l o 1 0 786 1 0 1 1 0 5 1 0 500 l o 1 1 414 kl O 1 0 707 1 0 1 2 000 kl O Table I l Fixed Reproduction Ratio Table l 2 Copy Speed COPYNIGNT t 1992 CANON INC C A N O N NPZl20 ZMO NN M A Y 1990 PRINTEO IN JAPAN IIMPNIME AU JAPON 1 5 ...

Page 20: ...Table l 3 Paper Size 1 6 COPYAIGNT 0 1592 CANON INC C A N O N NPZl20 2020 RN 0 MAY 1990 PRINTEO IN JAPAN IIMPNIME AU JAPON ...

Page 21: ...rd glass 0 Control panel Figure 1 l NP2020 NP21 20 Fixing assembly knob Drum unit Delivery unit release lever Developing assembly release lever 0 Developing assembly c3 Registration knob NP2120 0 Multifeeder NP2120 Figure I 2 COPYNIGNT 0 1992 CANON INC C A N O N NP2120 2020 NEV 1 DEC 1992 PAINTM I N J A P A N IIMPRIME AU JAPONI 1 7 ...

Page 22: ... mirror Manual feed pick up roller Manual feed tray Vertical feed roller 1 Vertical feed roller 2 I Cassette 1 pick up roller Cassette 2 pick up roller Registration roller Transfer corona unit l Static eliminator Photosensitive drum 8 Cassette 1 Cassette 2 0 Feeder unit 0 Ozone filter Exhaust fan 8 Fixing unit 0 Delivery roller COPYNIGNT f3 1592 C A N O N ING CANON NPZl2LVZMO AW 0 MAY 1990 PAINTED...

Page 23: ... mirror Manual feed roller Manual feed pick up roller Vertical feed roller 1 Vertical feed roller 2 0 Cassette 1 pick up roller Cassette 2 pick up roller Registration roller Transfer corona unit Static eliminator Photosensitive drum Cassette 1 Cassette 2 Feeder unit Ozone filter Exhaust fan Fixing unit Delivery roller CWYRIGHT c 1932 C A N O N ING C A N O N NPZl20120 20 RN 0 OK l X2 PRINNI IN JAPA...

Page 24: ...he indi cation goes OFF 2 sec after the key is released I RESETkey Press the key to return to the standard mode C o p y c o u n t 1 Ratio _ _ _ DIRECT M o d e _ _ _ _ NON SORT AE _ _ OFF Figure l 4 PRE HEAT key A press on the key in the standby mode activates the pre heat mode All LEDs except the PRE HEAT indicator and POWER indicator will go OFF The fixing temperature will be controlled at 14O C ...

Page 25: ...placed by the copy count in 2 sec RESETkey Press the key to return to the standard mode copy count 1 DIRECT non so AE may be deactivated PREHEAT key Pressthekeyduringthestandbyperiodtochoose the preheat mode All LEDs except the PREHEAT and POWER indicators on the control panel go OFF POWER switch POWER indicator The indicator remains ON when the POWER switch is ON TENKEY pad 0 CLEAR STOP key COPY ...

Page 26: ...n and the operation stops add paper to the cassette a press on the COPY START key thereafter causes the copier to make the remaining number of copies IfanADFisattachedtothecopier documents placedonthetraywill beautomaticallypicked upandcopiedwhentheCOPY STARTkeyis pressed l 10 COPYRIGNT 1992 CANON INC C A N O N NPZl20 ZMO RN 1 OEC 1992 PAINTEO I N J A P A N IIMPAIME AU JAPONI 0 After each copy ope...

Page 27: ... to the front 4 Hold the grip of the developing assembly and lift the assembly slowly Figure l 6 5 Place the CT unit on the developing assembly rail and slide it in 6 Turn the developing assembly lever clockwise 7 Close the front door 1 G E N E R A L D E S C R I P T I O N Note 1 Donottiltorshakethedevelopingassembly or CT unit 2 Do not place the developing assembly or CT unit on the floor rather k...

Page 28: ...ng the jam wait period You still have access to the DENSITY key AE key RESETkey orSTOPkeyafteractivatingthe auto start mode To cancel the auto starl mode press the RESET or CLEAR STOP key Note The autostart mode will automatically be canceled if the cassette has run out of paper if the control card is not inserted or if the right door of the cassette holder is open l 11 a COPYAIGHT 0 1992 CANON IN...

Page 29: ... unit to remove all paper found Figure 1 9 5 Close the delivery unit cover 6 Check if paper is jammed in the separation unit feeder unit if paper is found turn the feeder unit release lever counterclockwise to release the feeder unit Work with care Note When removing paper from the separation unit take care not to touch the photosensitive drum Figure 1 l 0 1 Open the front door 2 Remove the copies...

Page 30: ...eder Tray NP2120 Lift the lever and pull out the jam taking care not to tear the paper Figure l 12a B ADD PAPER Indicator The indicator goes ON if no cassette is in the cassette holder or the cassette has no paper 1 Slide out the cassette to the front of the copier 2 Put paper in the cassette 3 Slide the cassette back into the copier COPYAIGNT 0 1992 C A N O N ING CANON NPZlZO ZG70 NEW 0 DEC 1592 ...

Page 31: ...se lever clockwise 13 Close the front door 2 CT Unit mono color developing unit If the image seems too light in parts of a mono color copy the CT unit is likely to be running out of mono colortoner replace the unit if this happens If the CT unit is placed in the protection box and shaken the problem may be corrected temporarily Note The CTunit isof adisposabletype donot add toner but use a new uni...

Page 32: ...ng a dry cloth 3 Copyboard Cover Wipe it using a mild detergent solution thereafter wipe it using a dry cloth 4 Static Eliminator Clean the static eliminator using the cleaning brush accessory If separation jams occur frequently clean the static eliminator using the cleaning brush accessory as necessary 1 14 COPYAIGNT Q 1992 CANON INC CANON NPZlZO ZGZl RN 1 JAN 1992 PRINTEG IN JAPAN IMPRIME AU JAP...

Page 33: ...CHAPTER 2 COPYING PROCESS 1 IMAGE FORMATION PROCESS 2 1 II AUXILIARY PROCESSES __ _ ___ 2 6 COPYGIGNT 0 1992 CANOH ING CANOH NPZl20 2tVl AEV 0 MAY 1990 PRINTEO I N J A P A N I M P R I M E AU JAPON ...

Page 34: ...s are formed in the following eight steps Step 1 Pre conditioning exposure Step 2 Primary corona exposure negative DC Step 3 Image exposure Step 4 Development AC and negative DC Step 5 Transfer corona exposure negative DC Step 6 Separation Step 7 Fixing Step 8 Drum cleaning COPYRIGHT 0 1992 CANON INC CANON NPZl20 2020 AEV 0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI 2 l ...

Page 35: ... F O s g å r L L I T lz Light area Photoconductlng Iayer 5 0 0 Pre conditioning Primary corona Dark area step 1 step 2 I I Image exposure step 3 Figure 2 3 Figure 2 4 2 Formation of Electrostatrc Latent Image This block consists of the first three steps of the image formation process at its end the areas of the drum corresponding to dark areas of the document areleftwith negativecharges andthosere...

Page 36: ...he developing cylinder itself is made up of a magnet fixed in position and acylinder which rotates around the magnet The black developer is a single component developer of magnetite and resin The developer has insulating properties and is charged to a positive potential by friction with the rotating cylinder The color developer is a fixed ratio mixture of carrier iron powder and toner resin By fri...

Page 37: ... toner to the paper 2 4 8 Step 6 Separation Static eliminator Figure 2 12 In this step the paper is separated from the drum making use of the rigidity of the copy paper Thin paper with little rigidity however tends to remain in contact with the drum to prevent such a condition the static eliminator is charged to a positive potential to facilitate separation by weakening the static attraction betwe...

Page 38: ...he toner remaining on the drum surface is scrapedoff by thecleaning blade and collected by the scoop up sheet in preparation of the next copy cycle The toner is then moved aside by the blade COPYAIGNT Q 1592 CANON INC CAHON NPZl20 2MO KV 0 MAY 1540 PAINTEO IN JAPAN IIMPRIME AU JAPOH 2 5 ...

Page 39: ...o the photosensitive drum The non image section between two sheets of copy paper is kept free of toner by lowering the grid bias of the primary corona unit instead of using the blank exposure mechanism to remove the potential of the drum B Ozone Filter The fan unit is equipped with an ozone filter which breaks down the ozone generated by the coronas into oxygen by catalytic action 2 6 COPYAIGHT 0 ...

Page 40: ... the same token no repairs are prescribed for the PCBs at the user s premises for this reason PCBs are discussed by means of block diagrams rather than circuit diagrams Forthe purpose of explanation discussions are divided into the following from sensors to DC controllerPCBinputports fromDCcontrolleroutputportstoloads andminorcontrolcircuitsand functions 1 BASIC MECHANISMS 3 1 V POWER SUPPLY 3 52 ...

Page 41: ...n be divided into four functional blocks pick up feed system exposure system image formation system and control system Pi uplfeed system t Paperdeckpedestal A 1 l Figure 3 1 COPYAIGHT 0 1992 UINON I N C C A N O N NPZl20 2lVO AEV tl MAY 1590 PRINTED I N JAPAN IIMPAIME AU JAPONI 3 1 ...

Page 42: ...ping motors that use the oscillation frequency of the crystal oscillator built in the DC controller As such luctuations in the power supply fre quency during copy operation in turn fluctuate the main motor MI causing the copies to carry expanded or contracted images Q302 slave Controls the stepping motor Outputs the image formation control signals Q304 IPC Controls the serial communication with AD...

Page 43: ...al feed tray lxwer semor ioner level s e n s o r Copyboard cover S SLX Right door s e n s o r Document size sensor Density correction lW3 l r Papa deck pedestal Microprocessor Microprocessor CO0 1 master L a m p regulator l Sorier A D F i Feed clutch Pre exposure lamp Pickup clutch solenoid F e e d e r fan Cel application solenold Exhaust fan T o t a copy counter Multileeder solenoid NP21 2 0 Figu...

Page 44: ...g at 02 W h e n p a p e r is present 1 flag is a t cl3 W h e n scanner is at home position 1 llag at 04 When paper is present 0 flag is not a t 05 W h e n p a p e r is absent in pper cassette 0 flag is not a t c 7 W h e n papa is absent in lower cassette 0 flag is not a t Q7 W h e n copy paper is present 1 flag is a t 03 W h e n b l a c k tener in black developing a s s e m b l y is below specifie...

Page 45: ...transfer c o r o n a wire cleaner is a t home position front 0 w h e n transfer c o r o n a wire cfeaner is a t rear 0 Wh n right door is opa 1 W h e n paper is present 1 w h e n permanent magnet on papa detection lever is away Clock signa1 Cfock signa1 lReads the cassette size see p 3 43 Voltage fowers w h e n fixing rolfer temperahlre rises analog signal Scanning lamp intensity varies corrects d...

Page 46: ... u m e n t is present 0 output W h e n 0 L E D O goes ON w h e n d o c u m e n t is present 0 output W h e n o L E D O goes ON w h e n d o c u m e n t is present 0 output W h e n 0 L E D O goes ON when d o c u m e n t is present 0 W h e n S S R is ON 1 3 6 COPYAIGHT 8 1Y32 CANOH ING C A N O N HPZtZO ZMO REY 1 O E C 1992 PAINTEO IH JAPAN IIMPAIME AU JAPONI ...

Page 47: ... t s p a g e separation 2 n d p a g e I i leading edge non fmage width tun I clockwise to delay glrd bias ON I timing for larger non image width I V R 2 a d j u s t s AE slope in service m o d e VRl a d j u s t s AE referente p o i n t in service mode SWl service switch RI wl en cut AE removed from standard mode R 2 w h e n cut document size identiflcation disabled R 3 w h e n cut auto clear disab...

Page 48: ...F F sae p 3 4 7 W h e n i fixing heater goes ON ming l a m p See D 3 26 Main motor When 70 main motor and scanner c o o l i n g fan go ON Scanner cooling fan D C power supply P C B Figure 3 7 COPYAIGHT G 1592 C A N O N ING C A N O N NPZf20 2020 AN I O E C 1992 PAINTEO I N JAPAN IIMPRIME AU JAPONI d 3 8 ...

Page 49: ...eeder solenoid 24v NP2120 only SL5 4 mi7 Feeder fan Exhaust fan pre exposure l a m p Figure 3 8 W h e n 0 C L 1 goes ON k h n 0 C L 2 goes ON When 0 C L 3 goes ON W h e n 0 C L 4 goes ON W h e n 0 SLI goes ON W h e n 0 SLZ goes ON W h e n 0 S L 3 goes ON W h e n 0 S L 4 goes ON W h e n U S L 5 goes ON W h e n o F M 2 goes ON W h e n 0 F M 3 goes ON When O pre exposure lamp goes ON COPYRIGHT 1932 C...

Page 50: ... i 55047 2 4 I Con1rol c c v r 3 plel PCS II 14lp 3 J31k7CCmT I I i 7JJ Figure 3 9 S e e p 3 18 See p 3 l 7 See p 3 38 W h e n 0 total copy counter goes ON W h e n 0 multifeeder present L E D goes ON N P 2 1 2 0 only W h e n 0 ON W h e n 0 card present 3 l 0 cOPYRIGHT 0 1992 CANON INC C A N O N NPZl20 2MO RN 2 DEC 1992 PAlNITO IN JAPAN IMPRIME AU JAPONI ...

Page 51: ...tion move forward AER AE Between when the scanner is Measuresthedensityofthe Theoperationappliestothe measurement moved forward about 70 mm document by moving the the AE mode only 2 8 in from the document scanner about 70 mm 2 8 leading edge and when it is in forward and in reverse returned to the home position SCFW scanner While the scanner is moving The scanning lamp illumi The registration sign...

Page 52: ...eted Cleans the drum surface The last copy is delivered until the main motorstops after electrostatically thecopypaperhasmovedpast the delivery sensor STBY standby FromwhenLSTRiscompleted Waits for a press on the until theCOPY STARTkey is COPY START key or pressed or power is switched operation keys OFF 3 1 2 COPYAIGHT 0 1992 CANON IX CAWOW HPZl2012CQ0 AN MAY 1990 PAIHTFII IA JAPAN IMPRIME AU JAPO...

Page 53: ... lens and the focal distance are shifted to vary the reproduc tion ratio across the drum ThescannerdrivesystemmovestheNo 1 mirror faster in relation to the drum rotation for reduced copies or slower for enlarged copies Note When in the DIRECT mode the speed of the No 1 mirror and that of the drum rotation are identical DIRECT F REDUCE B ENLARGE m Figure 3 11 COPYRIGHT 0 1992 CARON IHC C A N O N NP...

Page 54: ...moving the lens to the home position When the lens reaches the home position the lens drive motor rotates in re verse it then stops after the signa1 plate has left the sensor Qi and a specific number of pulses has been generated positioning the lens at the DIRECT position Likewise the lens is first moved to the home po sition also for both enlargement and reduction op erations it is then moved and...

Page 55: ...ter r l Lens drive motor solenoid SL4 Lens drive pulley Blank shutter drive E N L A R G E M E N T Figure 3 13 Lens Drive System viewed from above COPYAIGHT 0 1992 CANON IWC C A H O H HPZlZO ZMO KV 0 M A Y 1590 PRIHIEO I N JAPAN IIMPAIME AU JAPOHI 3 15 ...

Page 56: ... 3 14 Sets the lens at the DIRECT position 0 Sets the blank shutter at the home position Sets the lens at a point suited to the specified reproduction ratio The copier s blank exposure shutter is designed to move according to the specified copy size as such the shutter moves also in the DIRECT mode Moves the blank exposure shutter for blank exposure rear to suit the specified reduction ratio 3 16 ...

Page 57: ...s l and the motor is rotated by applying pulses on each phase in sequence When the lens drive motor is at rest LNSTB is 0 the motor is supplied with current by way of R418 so as to hold the lens in place 5 3 0 8 5 4 0 1 k i 1 12 LNA 3 1 D C controller P C B M o t o r driver P C B Figure 3 15 1 B I I Lens drive motor COPYRIGHT 0 1992 CANON IHC C A N O N HPZ120 ZMO R N 0 MAY 1990 PAINTEO I N JAPAN I...

Page 58: ...er in reverse however its speed is constant regardless of the reproduction ratio 3 5 times as fast as when moving forward The distance over which the scanner moves varies according to the length of the copy paper and the reproduction ratio No 2 mirror mount N o 1 mirror mount S c a n n e r h o m e Scanner motor n drive signa1 D C controller PCE M o t o r driver P C B Figure 3 16 3 l 8 COPYAIGHT 0 ...

Page 59: ...Table 3 2 Description Registration clutch ON Grid high voltage output ON Scanner reverse OFF 0 1 sec later 3 Basic Sequence for Scanner ENLARGE REDUCE POWER switch ON COPY START key ON COPY START key ON Figure 3 17 COPYRIGNT 1992 C A N O N ING C A N O N NPZl20 2CQO AB 0 M A Y 1590 PAINTEO I N JAPAN IIMPRIME AU JAPON 3 19 ...

Page 60: ...normal copy mode II It is more or less identical to 1 however if the distance over which the scanner moves forward is longer than 210 mm 8 3 in 115 220 24OV models 210 mmB 3 in 216 mm 85 in will be identifiedas thereferencetothedocument lead ing edge Ifthedistanceisshorterthan2lOmm 8 3in 216 mm18 5 in the point at which the scanner re verses will be identified as the document leading edge of the s...

Page 61: ...lowered to about 20 deg SW4 ON and about 1 sec second afterthe over has been lowered to about 5 deg SW5 ON The DC controller recognized the presente of a document if the two measurements are identical conversely it recognizes the absence of a document if the measurements are different D C conlroller P C B The thickness of the arrows represents the degree of the level Figure 3 19 When a document is...

Page 62: ...oller identilies I the dacument size 1 ON OFF I C o p y b o a r d cover switch 1 SW4 I I Copyboard cover switch 2 SW5 ON 1 O F F I Document identification timing Document identification circuit L E D Figure 3 20 Document Identification Timing 3 22 COPIAIGHT 0 1992 C A N O N ING C A N O N NP2120 2020 KV 0 M A Y 1990 PRINTEO IN JAPAN IMPRIME AU JAPONI ...

Page 63: ...ng varying varying varying 4 constant vafying constant no change to output of document identi fication circuit recognizes resence of document varying change to output of document identifica tion circuit recognizes absence of docu ment Table 3 3 v Document identification circuit t p l __ D o c u m e n t identificatlon signa1 1 DSZl D c c u m e n t identification signa1 0 DSZO D c c u m e n t Identi...

Page 64: ...e 3 22 shows the construction of the image cleaning unit Controls the blank shutter formation system and the system has the following functions Pre exposure lamp I l L a m p regulator 5 c 3 AE senso x w a Photosensitive drum I I G R D O N r Black d e v e l o p i n g I a s s e m b l y I High voltage transformer Developing cylinder LA r Figure 3 22 3 24 COPVNIGNT 0 1992 CANON INC CANON NPZl20 2MO ME...

Page 65: ...uence of Image Formation P O W E R switch ON C O P Y S T A R T kev PtimaryITransfercorona unit G r i d tias I l I I 1 1 J I I I Figure 3 23 COPVRIGHT 0 1992 CANON I N C C A N O N NPZl20 2MO RN 0 M A V 1930 PAINTEO IN JAPAN IIMPAIME AU J A P O N I 3 25 ...

Page 66: ...correction lever controlling the voltage supplied to the scanning lamp so that it varies between 50 and 75 V phase control WhentheCTunitisused thevoltageapplied to the scanning lamp is raised by about 1 8 V as opposed to when the black developing assembly is used so as to increase the intensity of the scanning lamp A constant voltage 70 V however is applied to the scanning lamp during AE exposure ...

Page 67: ...5 a P 4 3 2 E 50 IY t _ _ The copy density correction lever serves to pre vent foggy images caused by deterioration of the photosensitive drum The copy density correction lever changes the intensity of the scanning lamp and a higher frees the copies of fogging t I I I t I 16 10 VI L I N T signa1 Setbycopydensitycorrection lever Figure 3 26 Figure 3 25 Copy Density Correction Lever COPYAIGNl CC 199...

Page 68: ...yiTransfer Corona Current ON and OFF When HVTON 1 bdifferential amplifier circuit goes OFF 4variablepulsegeneratorcircuitgoesOFF bHigh voltage transformer goes OFF 0 When HVTON 0 bdifferential amplifier circuit goes ON bvariablepulse generatorcircuit goes ON b High voltage transformer goes ON 3 Controlling the Primary Transfer Corona Current Constant If a corona current larger than the specific va...

Page 69: ...into the trans tor circuit former T4 bQ6 goes OFF bgrid bias is not applied bcurrent flows into the transformer 14 05 goes OFF í B ha The above condition does not charge the drum and as such toner is not attracted to the photo sensilive drum blank control The voltage applied to the grid is returned to the comparator circuit thereby providing a constant voltage COPYAIGHT G 1992 CANON INC C A N O N ...

Page 70: ...the Development Bias AC Component ON and OFF The square wave osciilatorcircuit is at work at all times as long as power is present When ACBON l 4AC bias switch circuit goes ON bsquare wave oscillator circuit output is cut The above condition deprives the developing cylinder of AC biases Q When ACBON O bAC bias switch circuit goes OFF The above condition causes the AC bias switch circuit to go OFF ...

Page 71: ...ling the DC Bias Voltage Level DCBCis6to16V bdifferential amplifier circuit goes ON bvariable pulse generator goes ON hDC high voltagetransformergoesON D C controller r C T unit is used COPYRIGNT 0 1992 C A N O N ING by the copy density key I DCBC I 6to16V Development bias DC component black developing assembly Developing bias DC component CT unit 450 to 430 v 480 to 110 V High voltage transformer...

Page 72: ... sensor output The level of the DC bias during image exposure varies according to the type of developing assembly The level of the DC bias varies according to the type of developing assembly other than during image exposure black developing assembly 320 V approx CT unit _ ___ _ __ _________ 220 V approx Note The development bias AC component when the CT tmit is used is synchronized to the main mot...

Page 73: ...positmn approx approx Figure 3 30 3 Fteading the AE Sensor Output The AE sensor consists of a photodiode Q702 and operation amplifier Q701 when the light re ceived by the photodiode reflected by the docu ment is strong the output voltage AE of the operation amplifier is low on the other hand if the The DC controller reads the output AE of the AE sensor based on the zero cross signa1 ZXDP sent by t...

Page 74: ... enter o on the tenkey pad on the control panel 5 Press the SORT GROUP key on the control panel The scanner moves forward to the AE meas urement point and the scanning lamp goes ON Note The scanning lamp remains ON for about 8 sec to turn it ON once again press the SORT GROUP key and press the key once gain after the operation stops 6 Adjust VR1 AE ref on the adjusting PCB so that the copy counter...

Page 75: ... will indicate 0 5 Enter 1 on the tenkey pad on the control panel The copy counter on the control panel will indicate 1 6 Press the SORTIGROUP key 7 Turn VR2 AE slope on the adjusting PCB so that the value on the copy counter of the control panel is the same as the value recorded in step 3 Document denslty Test S h e e t N e w s p a p e r Figure 3 33 8 Press the SORT GROUP key after making ad just...

Page 76: ...sensor Q9 is provided inside the black developing assembly to monitor the level of toner Theoutputofthetonersensorremains i as long as a specific level of toner is inside the assembly whenthetonerdecreases belowthelevel theoutput goes 0 The DC controller reads the output signa1 for 5 sec aftercopy operation is over if the signa1 remains O continuously it recognizes no toner 1 When no toner 2 is re...

Page 77: ...e REDUCE mode or section not in contact with the drum in the DIRECT mode The blank exposure shutter serves to control the area over which the light is directed The blank exposure shutter is operated by the drivefrom the lens drive motor M3 by way of gears when the blank shutter solenoid SL4 is OFF The lens drive motor first returns the blank expo sure shutter to the home position at Q2 it then rot...

Page 78: ... M4 rotates in reverse to move the wire cleaner in reverse The wire cleaner stops when the wire cleaner mount actuates the microswitch SW6 located in front of the transfer rail home position If SW6 is not actuated the COPY START key on the control panel remains red for 90 sec even after the wait period is over If the power is turned OFF in the middle of cleaning operation the wire cleaner mount st...

Page 79: ... or pass the sensors within a specific period oftime thecondition is identified as a jam and the JAM indicator on the control panel starts to flash The counter increases by one when the delivery sensor SW8 detects the trailing edge of the copy paper The control card on the other hand increases the count in response to each pick up The presente of paper in the upper and lower cassettes is checked b...

Page 80: ...OPERATIONS AND TIMING 3 40 DC controller PCB c 5 r 1 2 f Clubh Figure 3 39 COPYAIGNT 8 1992 CANON ING CANON NPZl20 2020 RN 0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 81: ... up Feed System COPY START key ON ON Control Card V if attached ncreases the coun when the pick up clutch solenoid SLI SLZ goes ON Figure 3 40 COPYAIGNT 0 1992 CANON INC CANON NPZ120 2MO REY 0 MAY 1990 PAINTED IN JAPAN IIMPRIME AU JAPONI 3 41 ...

Page 82: ...tch 1 CLI goes ON thereby feeding the paper up to the regis tration roller The sequence used to feed the copy paper in the manual mode is the same as in feeding A3 paper regardless of the size of the copy paper DC confroller PCB Manual feed pi up roller Registration roller Figure 3 41 copy papes set Feeder roller clutch 1 CLl Figure 3 42 3 42 COPYAIGHT Q1992 CANON INC CANON NPZl20 ZMO AEV 0 MAY 19...

Page 83: ... tray is pushed against the pick up roller by the paper guide plate The pick up roller is rotated by the drive from the main motor Mi transmitted by clutches The pick up roller and the separation pad pick up onesheetofcopypaper andsendittothe registration roller The foregoing series of operations is executed for each pick up Main motor Phok Multifeeder sensor Papa sensor lever Figure 3 39a COPYRIG...

Page 84: ...OPERATIONS AND TIMING b Sequence of Operations pick up from multifeeder COPY START key ON Figure 3 39b 3 42b CWf flIGHT 0 1992 CANON ING CANON NPZl20 2020 RN 0 OEC 1992 PRINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 85: ... the blank shutter x No cassette right 0 SW is OFF 1 SWisON Note ULI Argentine LTR Govemment LTR Korean Govemment ULZ Argentine LGL Govemment LGL Argeniine LTR R Govemment LTR R u2 See Note A4 210X297 B5R 1257X182 Foolscap Folio Australian Foolscap Korean Government R OFICIO Equadoran OFICIO Bolivian O F C I O B4 364X257 A4R 297X21 0 A3 420X297 Ul See Note Ul See Note u2 See Note Letter 8 5 Xll 21...

Page 86: ...ture standby pre heat 15O C control temperature copying 1 6 5 To prevent lowering of the surface temperate of the upper rollerduring continuous copying the control is switched as follows when copying lasts about 15 seconds a NP2020 when the black developing assembly is used If small size paper is used 170 C is switched to 175 C control If large size paper is used 170 C is switched to 185 C control...

Page 87: ... paper reaches the separation sensor Q5 thereby bringing the oil application roller intocontact with the upper fixing roller SL3 remains ON for about 4 seconds as timed by the microprocessor however it goes OFF as soon asthemainmotorstops ifthecopypaperisdelivered withjn 4 seconds oil application roller solenoid 5320 2 OILSL HI Main m o t o r 5313 g 8 pper lixing heater w 1 SSR ON 510o I detect o ...

Page 88: ...nse to a press on the PREHEAT key the temperature of thefixing assemblyiscontrolled to 140 C regardlessofwhetherthe blackdevelopingassemblyorCTunit isused However in the case of the NP2120 the temperature is controlled as in the standby period 1 140 C if NP2120 160 2 155 C if NP2120 170 C 3 46 COPYRIONT 0 199 2 CANON INC CANON NP2l20 2020 REY 1 OEC 1992 PRINTEO IN JAPAN IIMPAIME AU JAPON ...

Page 89: ...egulator generates LIGHT l scan ning lamp ON signal at all times as long as the scanning lamp is ON The above conditions cause the No 2 compara tor of Q309 to generate 1 thereby charging the capacitar C333 C333 becomes fully charged about 20 seconds thereafter and output 1 of the No 2 comparator is sent to the negative input side of the No 3 comparator As a result the output of the No 3 comparator...

Page 90: ...he condition of the scanning lamp Fixing heater Hl DC controller Figure 3 45a 2 Mechanism Figure 3 45a shows the error detection circuit and Table 3 5 lists the conditions for its activation The error AC shutoff relay RLl goes OFF in response lo the output of the errordetection circuit in terms of both software and hardware a Detection by Software Ifanerrorinthesurfacetemperatureoftheupper fixing ...

Page 91: ...lowing three conditions A B C the microprocessor thescanning IampONdetection signa1 LGHT the fixing temperature detection signa1 TH leams that the scanning lamp remained ON idenlifies overheating about 230 C of the Fixing temperalure detection signa1 S S R ON signal Heater drive signal Scanning lamp ON signa1 GHT continuously about 20 sec thermistor Error detecbon circuit Figure 3 45b COPYRIGHT 0 ...

Page 92: ...ive signa1 HTRD is not gen erated for 3 seconds after power on E004 is issued if the SSR ON is issued to the DC controller during the absence of the heater drive signal E004 is also issued when the DC controller identifies the SSR ON signa1 for 3 seconds or more in the absence of the heater drive signal Anyoftheaboveconditionscausesitsrespective error code to be displayed on the control panel see ...

Page 93: ... the front cover is opened cutting out the power The microprocessor holds the following five jam detection sequences and further it identifies a jam if paper is detected at time of power on When the copier identifies a jam it immediately stops operation and cuts out power to the fixing heater HI at the same time it flashes the JAM indicatoron the control panel indicating the location of the jam No...

Page 94: ...Ll SL2 m m 1 Jamckck 1 I I Pre registration sensor ca3 Main motor M1 Fixing heater H1 Variesbetweencassettes and2 Figure 3 47 0 Separation Delay Jam Themicroprocessor identifies aseparationdelay jam if the paper fails reach the separation sensor Q5 withinaspecifictimeaftertheregistrationclutch CL3 goes ON separation sensor as Figure 3 48 COPYRIGNT 1992 CANON ING CANON NPZl20 2U20 RN 0 MAY 1990 PAI...

Page 95: ...c time after the separa tion sensor Q5 detects the paper Figure 3 49 Delivety Delay Jam The microprocessor identifies a delivery delay jam if the paper fails to reach the delivery sensor within a specific time after the separation sensor Q5 detects the paper Jam check Figure 3 50 3 50 CUPYRIGNT 0 1992 CANON ING CANON NPZl20 2MO NN MAY 1990 PAINTEO IN JAPAN IIMPNIME AU JAPONI ...

Page 96: ...dentifies a delivery station ary jam if the paper fails to move past the delivery sensorwithinaspecifictimeafterthedeliverysensor SWB detects the paper Figure 3 51 COPYNIGHI 0 1592 CANON INC C A N O N NP2 20 2MO RN 0 MAY 1990 PNINTEB IN JAPAN IIMPRIML AU JAPOM 3 51 ...

Page 97: ...nism in the switching regulator Q204 upon activation the circuit also cuts off 12V and 5V outputs For 12V power a current fuse serves to protect against an over cur rent The protection mechanism for 5V power makes use of the over current detection circuit of the regu lator Q207 upon activation theoutput ofonly5Vis cut off For24V power an over voltage protection circuit isadditionallyprovidedusing ...

Page 98: ...powersupply for options makes use of the over current protection circuit inside the switching regulator QIOI It is also equipped with an over voltage protection circuit identical with that for the DC power supply of the copier itself The output after activation of the protection mechanism can bereturnedbyturningoffthepower correcting the relevant load oftheoption and turning the power ON once agai...

Page 99: ...y Drum heater 100 22ov only l l SortedDF Fixinq heater DC power SUPPfY 1 L 24V 12v 5 v cl Scanning lamp COrltrOller PCB 24V 5 v Paper dack pedestal iEq Figure 3 54 3 54 COPYNIGNT 8 1992 CANON INC CANON NP2l20 2MO RN 1 OEC 1592 PNINTfU IN JAPAN UMPNIME AU JAPONI d ...

Page 100: ...trol panel in its rotation speed caused byfluctuations EX 05 Q 59 5Hz in the frequency can bring about expan sionlcontraction of the image use it to check such problems 3 The pre exposure lamp and main motor are Use it to check the operation of the lamp driven and motor 4 All LEDs on the control panel go ON Use it to check the LEDs 5 The output voltage of document size 0 is Ifanyofthefollowing ist...

Page 101: ...el this activates the service mode 6 PresstheSORT GROUPkeyonceagaintostop execution of the service mode 7 Press the service switch SWl on the adjust ment PCB to leave the service mode The copier may also be turned OFF to leave the service mode 8 Attach the adjustment cover Figure 3 55 2 Check that the COPY START key is green 3 Presstheserviceswitch SW ontheadjustment PCB L Figure 3 56 3 56 COPYRIG...

Page 102: ... immedi b 0 t DC controller PCB faulty ately beforethe countergoes ON when the COPY START key is pressed or at power on Scanner motor M2 faulty The scanner initial operation is no over DC controtler PCB fautty within 15 sec at power on Scanner home position sensor The AE reverse operation is not over 04 faulty within 15 sec The reverse operation is not over within 10 sec after exposure All keys on...

Page 103: ...ared DC controller PCB faulty The IPC Q304 cannot be initialized attime Connector wl option poor con of power on tact The copier can be reset by turning it OFF and then ON when its self diagnostic mechanism has been activated If EOOO is indicated however the copier cannot be reset this way This is a consideration against damage lo the fixing rollerfrom over heating when the ther mistor fails to se...

Page 104: ...e not to bend the contact springs or soil contact surfaces clean the contacts using an alcohol solution if they are soiled 1 EXTERNALS 4 1 IV A Externa1 Covers 4 I B Control Panel 4 4 C Copyboard Cover 4 4 V D Fans 4 5 II DRIVE SYSTEM 4 7 A Lens Dríve Unit 4 7 VI B Scanner Drive Unit 4 9 C Main Motor Unit 4 12 VII III FEED SYSTEM 4 13 A Pick Up Unit 4 13 B Feeder Unit 4 16 EXPOSURE SYSTEM ____ _ _...

Page 105: ...per rear cover Control panel 0 Rear cover Front door I Multifeeder Figure 4 2 Remove the covers as necessaty for cleaning inspecting or repairing the inside of the copier Covers that can be detached by mere removal of the screws are leff out of the procedure COPYAIGHT 0 1992 CANON INC CANON NPZIZOUXO REY 1 OEC 1992 PAINTED IN JAPAN IMPRIME AU JAPONI 4 l ...

Page 106: ... the right edge of the glass Rear Cover Remove the air filter Air filter covef Air filter 2 3 Figure 4 3 Remove the four mounting screws Move the rear cover down until the four hooks are disengaged thereafter move it up to re move Hook in A Hook in C Figure 4 5 Hook in B Upper rear COYer Figure 4 6 Figure 4 4 4 2 COPYNIGHT 0 1592 CANON INC CANON NPZl2012MO REY 1 OEC 1992 PAINTEO IN JAPAN IMPRIME A...

Page 107: ... advance J Inside cover right Drum unit Q Inside cover left Developing assembly Ozone filter holder Fixing assembly knob Figure 4 7 3 Lower Front Cover 1 Remove the lower front cover three mounting screws Il I Left cover 0 Mounting screws Figure 4 9 3 Detach the left coverfrom the lower front cover 0 Mounting screws 0 Lower front cover Figure 4 8 Left cover 0 Lower front cover Figure 4 10 COPYAIOH...

Page 108: ...Section of A NP2020 Lencover Copierframe Copybard glass retainer Figure 4 12 Note If a sorter sorter Al is attached pull up the left cover to remove 4 4 NP2120 Mounting screws copyboard glass retainer Q Mounting screws right cover Right cover Figure 4 13 3 Open the front right door 4 Open the right door lo remove be careful with the lower front cover COPYAIGHT 8 1992 CANON INC CANON NPZlZO ZMO REY...

Page 109: ...quipped with three fan motors which serve to circulate the air inside the machine Each of these fans serves the following purpose Scanner cooling fan FMI cools the scanner 1 Remove the inside cover 2 Remove the five mounting screws and ground ing wire and pull the control panel up to remove Feeder fan FM2 moves copy paper Exhaust fan FM3 directsthe airto theoutside of the copier Figure 4 16 Mounti...

Page 110: ...n To remove the feeder fan see p 4 17 1 Remove the rear cover 2 Disconnect the connector J37 and remove the mounting screw 0 Mounting screw 0 Connector J37 0 Scanner cooling fan Figure 4 18 4 6 COPYRIGHT 0 1992 CANON INC 3 Open the front door and remove the ozone filter and inside cover lef thereafter lowerthefeed unit 4 Put a hand under the exhaust fan unit remove the two mounting screws and pull...

Page 111: ...ystem serves to drive both the lensandblankexposureshutter thedriveisswitched by the blank shutter solenoid SL4 Lmddrive motor 1 1 lensdiveunitisshownasshaded Figure 4 20 COPYNIGHT 0 1592 CANON INC CANON NPZl20Q O MV 0 MAY 1930 PAINTEO IN JAPAN IMPnIM AU JAPON 4 7 ...

Page 112: ... drive cable intact 0 Scanner motor 0 Mounting screws Figure 4 22 3 Slide the scanner motor somewhat remove the twomountingscrews disconnecttheconnector and remove the lens drive unit Lens drive unit Q Connector Mounting screws Figure 4 23 3 Lens Cable Route the lens cable as shown in Figure 4 20 4 8 COPYRIGHT G 1542 CANON ING CAWON NPZl20 ZMO REY 0 MAY 1990 PRINTED IN JAPAN IMPRIME AU JAPONI ...

Page 113: ...he cable as shown in Figure 4 24 scriber and loosen two screws B which hold the 2 Turn screw Ato adjust the position of the fixing fixing plate in place plate align it with the line drawn using a scriber 2 Loosen screw A and detach the scanner cable 3 Tighten screw B COPYRIGHT G 1992 CANON ING CANON llP2120 2020 RN 0 MAY 1930 PAIHTEO IN JAPAH IIMPAIME AU JAPONI 4 9 ...

Page 114: ...nts screw Note i The cable tends to become slack as cop ies are made necessitating adjustment of its tension ii If the optical distance between the No 1 and 2 mirrors is not correct the horizontal reproduction ratio will not be correct and at the same time images will be out of focus Figure 4 25 viewed from above 1 Draw lines on copy paper A4 A3 LTR or 11 X 17 1 cm 0 4 inch from each end as shown ...

Page 115: ...ean the scanner rail thereafter apply lubricant evenly along the rail Copied A Fed B Figure 4 27 x y X Y X Y Correct Move the No 1 mirror mount in the direction of a Move the No 1 mirror mount in the direction of b Note IfthedistancebetweentheNo 1 and2mirrors is too short the copy image will be enlarged and if too long reduced No 1 mirror mount Mirror drive cable COPYRIGNT 0 1992 CANON INC CANON N...

Page 116: ...ANON NPZl20 2MO RN 0 MAY 19917 PNINTEO IN JAPAN IIMPRIME AU JAPONI The drive of the main motor is used to drive the drum and execute pi up operations by way of tim ing belts To adjust the tension of the timing belt used to drive the drum push the center of the belt using a spring gauge with a forte of 500 g and select the main motor mounting holewhich enables the top and bottom of the belt to be 2...

Page 117: ... roller shaft Detach the rubber from the pick up roller see Figure 4 34 Rubber on pick up roller Figure 4 34 Positioning the Pick up Roller See Figure 4 35 when mounting the pick up roller on the ijpick up shift be sure to use the correct mounting hale front mar Pi up shaft Mounöng hale for inch system ú 1 0 0 OO QOP t f l Mounting hale for metric system No notes are given atmve for mounöng boles ...

Page 118: ... 3 Remove the spacer E ring and tension spring co E ring 0 Tension spring spacer Figure 4 37 5 Open the front door and remove the inside covers left right 4 1 4 COPYAIGHI Q 1992 CANON ING CANON NP2 20 2020 RN 0 MAY 1990 PAINTED IN JAPAN IIMPAIME AU JAPONI 6 RemovetheE ring tensionspring andbushing and remove the registration roller E ring Bushing Tension spring Registration roller Figure 4 38 ...

Page 119: ...emove the Remove the E ring and bushing and remove the feeder oller feeder oller COPYAIGNT 62 1992 CANON INC CANON NPZl20 2MO REY 0 MAY 1590 PAINTEO IN JAPAN IMPRIME AU JAPONI E ring Bushing Figure 4 41 6 Manual Feed Pick Up Woller NP2020 1 Remove the right cover 2 Remove the manual feed pick up unit two mounting screws one connector Manual feed pick up unit Connector 0 Mounting screw Figure 4 42 ...

Page 120: ... pad into the direction of multifeeder assembly the arrow Ql Screws Multifeeder assembly 4 15a Figure 4 44b 8 Detaching the Wlultifeeder Separation Pad NP2120 1 Detach the right cover 2 Remove the screw and detach the separation pad together with its mount Screw Mount Separation pad Figure 4 44d COPYNIGHT 0 1592 CANON ING CANON NPZl20 2020 REY 0 OEC 1592 PAINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 121: ...ver 2 Remove the screw and detach the bushing then detach the roller cover 0 Pick up roller Figure 4 4421 Bushing Q Roller cover Figure 4 44e 3 Remove the E ring plastic and move the bus ing in the direction of the arrow E ring Q Bushing Figure 4 441 COPYAIGNT 0 1992 CANON INC CANON NP2l20 ZMO AN OEC 1592 PAINTEG IN JAPAN IMPRIME AU JAPON 4 15 b ...

Page 122: ...e DC controller PCB and remove the grounding wire Q Grounding wire Connector J309 Figure 4 45 3 Remove the E ring and the bushing 4 Remove the insioe leftcover and remove the E ring and bushing E ring Bushing Figure 4 47 5 Lift the fixing assembly side of the feeder unit and pull it toward the front to remove Feeder unit Figure 4 48 E ring Bushing Figure 4 46 4 l 6 COPYRIGHT 0 1992 CANON INC C A N...

Page 123: ...e holder Mounting screws Figure 4 50 COPIAIONT 0 1 332 CANON INC CANON NPZl20 2MO AEV 0 MAY 1590 PRINTEU IN JAPAN IIMPAIME AU JAPONI 4 5 6 7 0 3 1 2 g Disengage the hook and remove the motor cover Remove the four fastons from the microswitch Remove the screws at the rear and remove the corona unit rail Detach the feeder belt Feeder belt Figure 4 51 Feeder Fan Remove the two feeder belts Disconnect...

Page 124: ...n of the arrow and remove the scanning lamp Note i Wait until the scanning lamp has cooled before starting the work ii Do not leave finger prints on the scanning lamp 2 Hold the rear side of the No 1 mirror unit and move it to the right as shown in Figure 4 55 Note Be sure to hold the rearsídewhen moving the No 1 mirror mount 0 0 Mounting screw Thermal fuse No 1 mirror mount Figure 4 55 3 Remove t...

Page 125: ...opyboard glass lens cover rear cover drum unit and developing assembly 2 Mark the blank exposure shutter home position sensor on the lens mount using a scriber and remove it Sensor Figure 4 57 3 Disconnect the connector J731 from the pre exposure PCB I J h 4 2 Connector HVT Figure 4 58 4 Holdtheblankexposureunitfrombelow remove thethreemounting screws andpull ittothefront to remove 0 Mounting scre...

Page 126: ...rror cleaning 1001 4 2 0 Figure 4 61 No 5 mirra Put the mirror cleaning tool against the No 5 mirror as shown in Figure 4 62 and clean the mirror by sliding the tool No 4 mirror Figure 4 62 Cleaning fhe No 6 Mirror Remove the drum unit developing assembly and dust proof glass Put the mirror cleaning tool against the No 6 mirror as shown in Figure 4 63 and clean the mirror by sliding the tool Mirro...

Page 127: ...sembly release lever counterclockwise 3 Pull the drum unit to the front to remove Note Take care not to damage the drum The photosensitive drum is susceptable to light if exposed to room light the drum can cause white spots or black lines on the copies As a rule the copier should never be turned ON withthedrumunitremoved otherwise theregistration roller and transfer guide may interfere and the reg...

Page 128: ...ect it from light 2 Disengagethetwohooks andpuIIouttheprimary corona unit from the drum unit Hooks 0 Primary corona unit Figure 4 65 4 22 COPYAIGNT Q 1992 CANON ING b Transfer Corona Unit 1 Remove the transfer corona unit cover and remove the transfer corona unit Transfer corona unit cover 0 Mounting screw Figure 4 66 2 Pull out the static eliminator 0 Transfer corona unit Static eliminator Figure...

Page 129: ...r 5 Hook the loop of the corona wire as shown in Figure 4 70 and fit the wire along the V groove of the height adjusting block Hook the corona wire tension spring on the corona wire and turn the spring three to four times as shown in Figure 4 70 Figure 4 70 6 Cutofftheend excess ofthecoronawiretoless than 1 mm using a nipper 7 Pick the end of the corona wire tension spring using tweezers and hook ...

Page 130: ...ed OFF during cleaning operation in such cases work as follows Movethewirecleanerofthetransfercoronaunit by hand to the rear as far as it goes Mount the transfer corona unit TurnthepowerON withthefeederunit released and check that the wire cleane returns to the home position Note The step given above is for when the cleaning motor is in good condition if the motor is not in good condition or if th...

Page 131: ...embly Figure 4 72 Fiaure 4 73 3 1 2 0 3 4 Removing the Blade Developing Cylinder and Side Seal Remove the developing assembly from the copier Remove the two screws and remove the developìng assembly upper cover Screws Developing assembly upper cover Figure 4 74 Placea newspaper on the floor and empty the developing assembly of toner Remove the two screws and remove the blade mount together with th...

Page 132: ... 9 Remove the two E rings and two gears E rings 0 Gears Figure 4 78 10 Remove the two screws and remove the developing cylinder holder rear ball bearing and developing roll Developing cylinder holder Balf bearing Developing roll Screws Figure 4 77 Figure 4 79 11 Remove the developing cylinder and side seal 4 26 COPYAIGHT 0 1992 CANON ING CANON NPZlZO ZMO KV 0 MAY 1990 PAINYEO IN JAPAN IMPRIME AU J...

Page 133: ...Note i Put the side seal shon and side seal long together as shown and attach them around the developing assembly ii Make sure that the shorl and long seals are positioned as shown in Figure 4 81 3 Mount all parts except the blade For the gear engage long tooth a and groove b to put the pieces together Figure 4 82 4 Push the blade mount against the developing cylinder in the direction of the devel...

Page 134: ...AY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI Figure 4 84 2 Remowing the Fixing Assembly 1 Open the front cover and remove the fixing assembly knob 0 0 2 3 4 Fixing assembly knob Mounting screw Figure 4 65 Remove the left cover Disconnect the three connectors Remove the two mounting screws and slide out the fixing assembly Connectors 0 Mounting screws Figure 4 86 ...

Page 135: ... fixing heater 3 Remove the thermoswitch holder ó CD Mounting screw Thermoswitch holder Heater mount plate front Figure 4 91 Figure 4 88 4 Lift the clep and remove the thermistor cover 4 Remove the mounting screw and remove the then remove the thermistor heater mount plate rear thereafter slide out the fixing heater I Mounting screw Fixing heater Heater mount plate rear Figure 4 89 MECHANICALSYSTE...

Page 136: ...ectionof the arrow frontof fixing assembly Pressure spring for lower roller Upper fixing roller Figure 4 96 bower Fixing Roller Remove the upper fixing roller Liftthelowerfixingrollertogetherwith thebushing to remove Mounting the Heater and Upper Fixing Roller Reverse the steps for mounting the heater and upper fixing roller with the following in mind a Heater I Do not touch the heater 0 Orient th...

Page 137: ... Table 4 1 l With both upper and lower rollers adequately heated a Measuring the Nip If the roller is cool wait for 15 minutes after the WAITindicatorgoes green make 20 copies and take measurements 1 Open the copyboard cover and make a solid black copy in A3 2 Switch the power OFF as soon as the leading edge of the copy comes out to the copy tray open the front doo and delivery unit 3 Turn the fix...

Page 138: ...oosen the screw on the paper guide If necessary mark the position on the fixing assembly mount using a scriber before loosening the screw Thermal switch holder Fixing assembly Figure 4 99 Note The thermal switch need not be adjusted if the contact is not even check if the thermal switch spring is deformed Do not use mounting screws otherthan those specified Note To adjust the position of the paper...

Page 139: ... upper separation claw 12 Mountingthe Upper Separation Claw Reverse the steps above to mount the upper separation claw with the following in mind Keep the upper separation claw unit to the rear if a scar is made on the upper fixing roller mount the claw about 4 mm displaced to the front 13 Removing the Lower Separation Claw 1 Open the delivery unit 2 Slidethelowerseparationguideplatetoremove Lower...

Page 140: ...cussed in this chapter are satisfied before installation and carry out all necessary inspections after installation 1 LOCATION 5 l IV SETTING THE CT UNIT 5 13 II UNPACKING AND INSTALLING V RELOCATING THE COPIER 5 14 THE COPIER 5 2 VI SETTING CONTROL CARD V 5 15 lll SETTING THE CASSETTE SIZE 5 8 VII ATTACHING THE DOCUMENT HOLDER 5 l 7 COPVRIGHT 0 1992 CANON ING CA ON HP2120 2020 AEVSJ M A V 1990 PR...

Page 141: ...oid locations near open fire or subject to dust or ammonia fumes and direct rays of the sun Provide curtains over the Windows if necessary C Choose a well ventilated place D Make sure all feet of the copier will be in contact with the floor E Allow at least 10 cm 3 9 in from any wall to provide access Jr 59 0 in i 2 m 78 7 in min 2 1 mJ32 7 in min II NP2120 Figure 5 1 10 cm min 3 9 in 1 1 1 2 5 m ...

Page 142: ... hold the grips and place the copier on the pedestal If a pedestal is used make sure it has been installed correctly according to its installation manual If you are placing the machine on a cassette pedestal make sure that the pedestal has been installed properly accordingto the INSTALLATION PROCEOUAE that comes with it Open the cardboard box and take out the parts and accessories Remove all tape ...

Page 143: ...to the right and pull it out 6 Open the front cover and disengage the Check that the developing cylinder is free of scratches developing assembly and remove it from the copier 7 Remove the cushion blocks from the feeder unit and fixing assembly Cushion blocks COPVRIGHT 8 1992 CANON ING C A N O N N Zl20 2070 REY 1 DEC 1992 PNINlEO IN JAPAN IIMPRIME AU JAPON 5 3 ...

Page 144: ...se later 9 Remove the lens lock screw wl shipping tag from between the drum unit rails of the copier 10 Open the delivery cover and remove the two fixing roller release rolls The reafter close the delivery cover 5 4 COPVRIGNT 0 1992 CANON INC CANON N Zl29 2MO RN 2 DEC 1992 PRINTED IN JAPAN IIMPAIME AU JAPONI ...

Page 145: ... the light blocking sheet Drum unit Take care not to damage the drum 2 Set the drum unit in the copier and fix it in Slide the drum unit straight along the rails into the copier place using the knob that held the dummy drum 3 Move the grip to clean the corona wire of the drum unit two to three times 4 Set the developing assembly in the copier The front cover may be left open and engage t COPVAIGHT...

Page 146: ...LLATIONm C Checking the Operation Check that the ADD PAPER and CASSETTE OUT cond copy operation is over COPYRIGHT F3 1592 CAHOH INC C A N O N NP212012MO REY 1 OEC 1992 PAINTEO IN JAPAN IIMPAIME AU JAPONI 5 5 ...

Page 147: ...e and keep it in Glose the developing assembly lid and Turn the developing assembly lever on the wpyboard aft key goes green and make six to ten 5 6 COPYAIGHT 0 1992 CANON INC CANON NPZlZO ZMO RN 0 MAY IPJO PRINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 148: ...s finished install the options ADF Al MS Al Sorter Al Stapler Sorter Bl Stapler Sorter BP andlor Control Card and the document holder W Points 10 Note for Photosensitive Drum Aiter Installation The photosensitive drum is susceptible to light and if exposed to light can cause white spots or black lines on the copy image take note of the following Donottouchthedrum if itssurfaceissoiled wipe off the...

Page 149: ... K0rean 84 Legal B5 Argentine Letter A4 R Lí ttWR B5R Argentine Legal Government Letter R Government Legal Argentine Letter R Foolscap Folio SiE Rear stop plate 297mm5420mm A3 11 7 X16 5 297mmX432mm itx17 ll X17 297mmX210mm A4 1 1 7 X8 3 279mmX216mm LTR 11 WX8 5 267mmX203mm G 11 7 583 265mmX190mm K 10 4 X7 5 257mmX364mm 84 iO i Xl4 3 216mmX356mm LGL 8 5 x14 0 257mmX182mm 85 lO l X7 2 28OmmX22Omm A...

Page 150: ...late is butted against the side stop plate Note See Replacing the Cassette Spring when using a different type of spring 4 Remove the side stop plate each from the two cassettes Side sfop plate Sh Figure 5 5 5 Remove the two screws that hold the paper size plate in place Figure 5 6 6 Slide the paper size plate along the index on the bottom of the cassette to suit the desired paper size Figure 5 8 9...

Page 151: ...Bolivian Officio Ul 5 10 Government Letter Argentine Letter Korean Ledger Table 5 2 COPYRICNT 0 1992 CANON INC A3 abcd 11x17 abcd A4 abcd Letter abcd Argentine Letter abcd Government Letter abc K0rean abc 84 abc EE abc A4 R a b LlXtWR a b Argentine Legal a b Government Lener R a b Government Legal a b Argentine Lener R a b Foolscap a b FOliO a b I Leoal iab Korean Ledger R a Em a Table 5 3 Claw Ca...

Page 152: ...OLIVIAN OFICIO Remove the two rubber stoppers from the inside plate Figure 5 10 Remove the inside plate and spring Figure 5 I 1 Change the spring as shown in Table 5 4 Set the inside plate and attach the rubber stoppers Figure 5 12 Check that the rubber stoppers are correctly attached further check that the spring at the rear is correctly set on the fixing behind the inside plate Inside plate spri...

Page 153: ...cassette is sized to GOVERNMENT LTR KOREAN or KOREAN R remove the pick up rollers shown below metric rollers GOVERNMENT LTR and KOREAN KOREAN R 5 1 2 Figure 5 15 COPYAIGNT Q 1992 CANON ING CANON NPZl20 2MO REY 0 MAY 990 PRINTEO IN JAPAH IIMPRIME AU JAPON ...

Page 154: ...straight out Note Do not pull out the orange film 5 6 Figure 5 17 COPYRIGNT 1992 CANON INC shake it about ten times in Ihe dlreclion of thc arrow Figure 5 16 Shake it in the direction of the arrows about ten times Figure 5 19 Set the CT unit in the copier once again and make test copies in the DIRECT mode repeat step 4 if the image is uneven Set the CT unit in thecopier and pull the orange tab str...

Page 155: ...m unit in a box for transport I I 2 Fix the scanner and lens in place l corona units and feeder unit release lever in place against 4 Tape the front door and delivety unit 5 Place a sheet of A3 or 11 X1 7 paper on the copyboard glass and tape the copyboard cover 5 14 COPYRIGHT Cj 1992 CANON INC CANON NPZ 20 2MO WV 0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 156: ...ol Card V Placetheclearsheetoverthe holeoftheindicator unit 0 Hole Figure 5 22 Fix Control Card V on the control panel using four mounting screws Slide a card into Control Card V and fix Control Card V where the card can be slid in and out INSTALLATIONW Holes for mounting screws Figure 5 23 Check that the connector for the printer is found at the center of the hole 0 I Connector for printer Figure...

Page 157: ...nnector Shorting connector Figure 5 26 11 Mount the control panel on the copier then arrange the grounding wire of Contra1 Card V using a harness band 12 Remove the protection sheet from the control panel guide plate of Control Card V 13 Attach the control panel guide plate of Control Card Von the control panel of the copier 0 Guide plate Figure 5 27 14 Turn the copier ON and check the operation o...

Page 158: ...t tray on the side of the left cover 1 Fit the mounting screws in the holes shown and attach the document tray see Figure 5 30 1 Remove the two screws of the left cover Figure 5 30 Screws not used Figure 5 28 2 Attach the document holder 0 Document holder Q Mounting screw accessofy Figure 5 29 COPYAIGHT IiZ 1992 CANON INC LANON NPZl20 2MO RN I UEC 1932 PRIWTEO I N JAPAN IIMPRIML A G JAPONI 5 17 ...

Page 159: ...AND SERVICING 1 PERIODICALLY REPLACED PARTS 6 i IV PERIODICALSERVICING CHART 6 4 l l CONSUMABLES 6 2 III PERIODICALSERVICING 6 3 COPYRIGNT 0 1592 CANON INC C A N O N NPZl2012mO RN 0 MAY 1990 PAINTEU IN JAPAN IIMPRIME AU JAPONI ...

Page 160: ...n of the machine when they fail Replace each part during the scheduled visit closest to the life indicated as of July 1992 7 Developing roll rear developing FS2 6019 000 1 500 000 assembly Note The above are estimates only and subject to change to reflect data from the field COPYAIGNT 0 1992 CANON INC CANON NPZl20 2MO AN I OEC 1992 PRINTEO IN JAPAN IMPRIME AU JAPUNI 6 l ...

Page 161: ...ssembly FA6 5361 000 1 200 000 Separation claw upper fixing assemblvl FA6 5433 000 5 l 2oo ooo I I Separation claw lower fixing assemblvl FA2 9037 000 l 5 l 2oosooo I I II Thermistor fixing assembly Insulating bush fixing assembly Fixing heater fixing assembly FH7 7127 000 1 300 000 FA5 2967 000 2 300 000 FH7 4289 000 1 300 000 ioov FH7 4290 000 1 300 000 115v FH7 4291 000 1 300 000 220v Developin...

Page 162: ... g abnormal sound h counter operation 4 Clean the corona units Dry wipe the units using lint free paper thereafter clean them using an alcohol solution Do not set unless dn 5 Clean the static eliminator and Clean the eliminator using the feeder unit cleaning brush accessory 6 Clean the fixing unit and delivery unit paper guide plate Use a solvent separation claw upper lower Use a solvent 0 static ...

Page 163: ...e Do not use solvents or oils other than those specified A Clean 0 Replace X Oil 0 Adjust 0 Check Remarks 6 4 COPYAIGHT j 1992 C A N O N ING CANON NPZl20 2MO KV 0 MAY 930 PRINTEO IN JAPAN IMPRIME AU JAPONI ...

Page 164: ...CIRCUIT DIAGRAM A 5 11 AE SENSOR A 30 WIRING DIAGRAM A 6 12 HVT A 31 DC CONTROLLER PCB A l 1 13 LIST OF SPECIAL TOOLS A 33 MOTOR DRIVE PCB A 25 14 LIST OF SOLVENT AND MATERIAL A 34 DC POWER SUPPLY PC0 A 26 DC POWER SUPPLY FOR OPTIONS A 27 COPYRI6HT 0 1992 CANON INC CAHON NP212012020 R N 1 J A N 1592 PAINTEO I N JAPAN IIMPRIME AU JAPONI ...

Page 165: ...2 DOCUMENT SIZE DETECTION signa1 0 DOCUMENT SIZE DETECTION signa1 1 DOCUMENT SIZE DETECTION signa1 2 FEED ROLLER CLUTCH DRIVE command 1 FEED ROLLER CLUTCH DRIVE command 2 FAN MOTOR 2 DRIVE command FAN MOTOR 3 DRIVE command GRID BTAS ON command FIXING HEATER DRIVE command HVT ON command LAMP ON command LOWER CASSETTE PAPER DETECTION signa1 LIGHT signa1 LENS HOME POSITION signa1 LED ON command LIGHT...

Page 166: ...SITION signa1 WCRP CORONA WIRE CLEANER REAR POSTION signa1 ZXDP ZERO COCC DETECTION signa1 Abbreviations AER INTR LSTR SCFW SCRV STBY WMUP WMUPR A 4 AE ROTATION INITIAL ROTATION LAST ROTATION SCANNER FORWARD SCANNER REVERSE STANDBY WARM UP WARM UP ROTATION COPVRIGHT 0 1992 C A N O N ING C A N O N NP2WJ ZMO HEY OEC 1992 PRINTED IN JAPAN IIMPAIME AU JAPONI ...

Page 167: ... applicable 10 22OV model PIi ópplicakks to IOOV model Scanner home Delivery position sensor h 3P J3OSl14P DC controller PCB J314 6P J316 12P IJ J315 PI J 13P J31S llP J319 6P J320 4Pl J3 Ta Sorter Casselle 1 Cassette 2 S w 7 Feedsr roiler Fee r paper sensor paper sensor papa Rlght door clutch 2 roller sensor swilch clurch 1 Cassetfa 2 Cassette 1 pick up pi up clutch clutch solenoid solenoid Pre e...

Page 168: ...NOdVi flV 3WlUdRII NVdVî NI OUNlHd 0661 81 O NU OZOZ OZIZdN HONV3 INI NON 13 2561 0 IH9lUAd03 m x Pr tqsod awc p oua os uo leqdde o 1 i PW ii I AOPZ AOZZ AS11 ll001 Od 01 l 08r LO9WlOZOZdN KWH9WlCl 9NkJlM P ...

Page 169: ... VN JOlOLll JWlJL 3S EAV alunoc Ado lelo1 011 13 80Er JOlOW eA Jp SU31 r w p oualos uo wydde 1 p OLHlOS Y31 MS yUG la duy aJnsodxa a j uq pxleqx J soI Wl MS JOOP l 3 b JOSUas Jaded paai fenuefl Cd EOI JOSU S mded 2 a lasse3 Od EaN Josuas Jaded 1 ajlassy ad sai7 8lEP BAV 1 431Ill3 JallOJ Jwaaj m EAP 7 q3lnl3 Jallol Japaaj 1130 3 3 Al SCEr p Josuas IaAal Jauoj y3leg uwalap mm 13 Josuas Jaded uo geqs...

Page 170: ...GRAM NP2020lA603 J201 g DFiSorter DCpowersupply PCS J206 Motor driver PCB 112 3 415 J402 IL DC power supply PC6 COPYAIGHT D 1992 CANON ING CANON NPZl20 2CQO AEV 0 MAY 1990 PRINTEU IN JAPAN IIMPRIME AU JAPONI A 9 ...

Page 171: ...LL w I n t 0 m a 9zcr 9zcr ...

Page 172: ...I I i I am w m h I I r l I I B m 0 4 u I m ll ...

Page 173: ...1 laN3 j n3v 033 I SaNO 3ati A5 Oddlnl 5aND AS ad31 saN3 AS adan SaNE 81Er 6LEr 9061 1 X33dO nada 13la anda landa wdnda alaa3 SaND SaN3 1ZEî 503a EZS3dO tzsna ozsna x3na w3a dOad0 d3dYa ddlla SoEr pJplE 4 IAH _ _ VAPZ bU I i IN11 daxz lHD1 ZklOc V E Eo9r z P E09r 9 Eo9r m 9 Eo9r g z PPî i w z 9zr z L 9zr VA PZ amz 1 i 1 ...

Page 174: ...RAM NP2120 A603 Motor driver WI3 DC power supply PCB DCconfroller Pee 1 J202 I 24VA NC GNDS 24VB GND24 GND12 12v GND5 5v MMD COPYAIGHT 0 1992 CANON ING CANON NPZl20L MO RN 0 OEC 1932 PRINTEO I N J A R N IMPAIME AU JAPON A 9d ...

Page 175: ...020 A604 3 I b2 I 1 Wirfng for DF andSoner DC controllerPCB s FG2 2829orFG2 2830 J39 mmmm J817 x 7 7 1 2 3 4 5 6 7 8 9 101112 To DF A 10 COPYAIGHT 0 1992 CANON ING CANON NPZl20 2CQO AN f JAN 1932 PAINTED IN JAPAN IIMPAIME AU JAPON ...

Page 176: ...Remarks 1 Door switch TKN 0093 A actuator 2 Spring scale CK 0054 B Measuring cassette spring compression strength Adjusting scanner drive cable tension 3 Cleaning oil TKN 0464 Note Rank A Each serviceman should carry one with him B A group of five servicemen should share one C Each workshop should keep one COPYRIGNT c 1992 CANON INC CANON NPZlZWZMO AEV 0 MAY 1990 PAINTEO IN JAPAH IIMPRIME AU JAPON...

Page 177: ...s 3 Heat resistant Lubricating the CANON Tool No CK 0427 500glcan grease drive mechanisms Equivalent grease can be used e g copyboard but should be able to withstand driving gear fixing 200 forextended periods of drive gear fixing time ass y etc 4 Lubricating oil Lubrication points Locally Tool No CK 0451 100 lowviscosity Scanner rail etc Equivalent oil can be used ISO VG 66 oil ESSO Febis K68 MOB...

Page 178: ...STAL SERVICE MANUAL COPYAIGHT 0 1592 CANON INC CANON NP2l20 2020 KV 0 MAY 1990 PAINTEO IN JAPAN IMPRIME AU JAPON ...

Page 179: ...r _ __ ___ _ _ 3 l P FRONT REAR __ _ ___ _ _ _ 3 5P B Feed Roller _ __ ___ __ __ 3 2P A Making Adjustments _ _ _ __ __ __ 3 5P C Separation Roller _ _ __ ___ __ 3 2P IV MODIFYING THE DECK SIZE __ 3 7P D Registration Roller _ _ _ _ __ __ _ 3 3P II DRIVE SYSTEM _ _ _ __ _ _ _ _ 3 4P A Deck Drive Unit _ _ __ _ _ _ 3 4P 1 PARTS TO BE REPLACED PERIODICALLY __ _ ______ _ _ 4 l P II CONSUMABLES __ ____ _...

Page 180: ...CHAPTER 1 GENERAL DESCRIPTION 1 SPECIFICATION _ ______ l 1P I I CROSS SECTIONALV EW _ ________ 1 2P COPYRIGNI 0 1992 C A N O N ING C A N O N NW ZO ZMO KV 0 MAY 1990 PRINW I N J A P A N IIMPRIME AU JAPON ...

Page 181: ...A4 LTR Capacity 115 mm stacked approx 1 000 sheets of 80 s m2 Size switching Plate and Size switch Power supply 115VAC from copier Dimensions 610 W x 577 D x 429 H mm 24 0 W x 22 7 D x 16 9 H in Weight 28 kg161 7 Ib COPIAIGNI 0 1992 CANON INC C A N O N NP2120 ZET BEY 0 MAY 1930 PAINTED I N JAPAN IIMPAIME AU JAPONI d l l P ...

Page 182: ...ion sensor Q Feeder roller Deck pre registration paper sensor I Deck registration roller Figure l 201 l 2 P COPYRIGNT 0 1992 C A N O N ING Separation roller Pick up roller Lifter u 0 C A N O N NPZl2012MO KV 0 M A Y 1 9 9 0 PAINTED IN JAPAN IIMPRIME AU JAPONI ...

Page 183: ...are not relevant to the serviceman s work and therefore left out of the discussions By the same token no repairs are prescribed for the PCBs at the user s premises for this reason PCBs are discussed by means of block diagrams rather than circuit diagrams For the purpose of explanation discussions are divided into the following from sensors to DC controllerPCBinputports from DCcontrolleroutputports...

Page 184: ...ier and from its own controller The copier sends signals as programmed in advance to the controller inside the pedestal Figure Z 201 is a block diagram showing the relationship among the pedestal3 majar circuits The pedestal is supplied with 24 V 5 V and 115V VAC by the host copier switch 1 MS k U p p e r limit Paper deck controller PCB Figure 2 201 AC a Liflerclutch Pi up clutch COPYAIGNT 8 1932 ...

Page 185: ...Zf20 ZU20 RN 0 MAY 1590 PAINTED IN JAPAN IMPRIME AU JAPON F i g u r e 2 2 0 2 57 6 HoSf mpk r 57 J80 J 3 2 2 DCcontro erPCB 4 15 e 6 7 Li C D Vhen 0 CL2 goes ON 1 S D When V SLI goes ON SIZO SI21 DKEX Oscil ation signa PD P 1 Wh sn paper is presenf in deck 1 P D P 2 When C ZZ detecb papr 1 L T D Whsn Q23 dstects iffet 1 J C D When 0 CL1 toes ON I CD When 0 CL3 goes ON ...

Page 186: ...troller 2 2 Paper deck controller PCS r Jl 1 I I switch F i g u r e 2 2 0 3 DC controller PCS l DMD When O Mi goes ON DOP When right door is closed and deck is set 1 L COPYRIGNT 0 1992 CANON ING CANON NP2 20 2 0 mV 0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI 2 3P ...

Page 187: ...y the signals from the copying machine as well as from sensors and switches by way of the paper deck controller PCB The lifterlowers on itsown weightwhen thepaper deck is pulled out releasing the gears Paperdecl cannollerPC8 r v l 2 4P ci MS2 F i g u r e 2 2 0 4 COPYRIGNT 0 1992 CANON INC CANON NPZl20 ZMO KV 0 MAY 1990 PAINTEO IN JAPAN IMPRIME AU JAPONI ...

Page 188: ...he paperdeck motor Msdriven in response to the deck motor drive DMD signa1 from the The clutches in turn are under control of the signals from the copying machine When paper is picked up the pick up roller is raised by the pick up roller release solenoid SLI Sopying machine cantrolfer PCB COPYRIGNT 0 1592 CANON ING CANON NP2 20 2020 AN JAN 1992 PRINYEO IN JAPAN IMPAIME AU JAPONI vertica paf roffer...

Page 189: ...OPERATIONSANDTIMING 1 Sequence of Pick up and Feed Operations COPY START key ON 24P Figure 2 206 COPYAIGHT 0 1932 CANON ING CANON NPZl20 2MO RN 0 MAY 1990 PAINTED IN JAPAN IIMPAIME AU JAPON ...

Page 190: ... facili tates positioning of the deck and clearing of jams When the latch on the grip comes off the cam on the edge of the roller release shaft the arm on the rollerreleaseshaftrisesandthepick uproller inturn is raised On the other hand when the latch on the grip pushes up the cam upon insertion of the deck the arm lowers and in turn the pick up roller is lowered The arm is also used to release th...

Page 191: ...e Separation Roller Theseparation rolleris releasedwhen thecamon the deck side plate comes off the release lever roller Releare Iwer lease leve ler Figure z 208 2 8P Figure 2 209 CDPYRIGHT 1992 CANOA INC CANON NPZl20 2GZO EV 0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI ...

Page 192: ... UP AND FEEDER SYSTEMS ____ 3 1 P III ADJUSTING THE REGISTRATION II DRIVE SYSTEM _____ 3 4P FRONT REAR ____ 3 5P IV MODINING THE DEC SIZE 3 7P COPYRIGNI 0 1992 CANON INC CANON NPZlZO ZMO RN 0 MAY 1990 PRINTEA IN JAPAN IIMPRIME AU JAPON ...

Page 193: ...gure 3 202 3 Detach the deck from the front Slide it out to the front until it stops detach it as if to lift it Figure 3 203 4 RemovetheE ring anddetachthepick uproller front thereafter pulloutthepick uproller rear together with its shaft E ring Pick up roller front Pick up roller rear Figure 3 204 COPYAIGHT 0 1902 CANUH ING CANON NPZl20 2WZO RN 0 MAY 192 0 PNINTEO IN JAPAN IIMPRIME AU JAPONI 3 l ...

Page 194: ...n the right door of the pedestal 3 Remove the two stop rings and detach the separation roller Feed roller 0 Stop ring Figure 3 205 Note Take care the feed roller has its own orienta tion Stop ring front Stop ring rear Figure 3 207 Figure 3 206 3 2P CopynIGHT 0 1932 CANON ING CANON NP2120 2MO NB 0 MAY 1990 PAINYEU IN JAPAN IIMPNIME AU JAPONI ...

Page 195: ... 2 Remove the E ring at the rear and the spring E ring 0 Springs Figure 3 208 3 Remove the E ring at the front and detach the gear thereafter detach the registration roller 0 E ring Gear Q Spring Registration roller Figure 3 209 COPYAIGHT 0 1592 CANON INC CANON NR ZO ZWO RN 0 MAY IPJO PAINm I N JAPAN IIMPAIME AU JAPON 3 3P ...

Page 196: ...e deck stopper plate and pull out the deck 5 Detach the right cover from the pedestal 6 Detach the right door from the pedestal Strap Q Right door of pedestal Figure 3 212 7 Remove the four mounting screws and pull the deck drive unit to the front to detach Mounting screws Deck drive unit Figure 3 213 Mounting screws Right cover of pedestal Figure 3 211 3 4P COPYAIGHT 0 1592 CANON INC CANON NPZi20...

Page 197: ...214 MECHANICALSYSTEM m A Making Adjustments 1 Slide out the deck Figure 3 215 2 Loosen the four mounting screws on the front cover and the four mounting screws on the grip plate Grip plate Mounting screws Grip plata Mounting screws for Iront caver Figure 3 216 COPYRIGNI 0 1992 CANON ING CANON NPZl20 2070 RN 0 MB 1590 PRINTED IN JAPAN IIMPRIME AU JAPONI 3 5P ...

Page 198: ...s about 0 5 mm 0 5 mm approx Decrease the non image width a lhe front increases he non image widh at the rear Front cover Decrease the non image width at the rear increases the non image width at tk front about 1 mm l Figure 3 217 4 Tighten the four mounting screws on the grip plate after adjustments 5 Set the deck Note Slide it to the front thereafter without releas íng the latch I Pedestal frame...

Page 199: ...TR by relocating the three partitions and resetting the DIP switch Modifying the Deck Size 1 Detach the rear cover from the pedestal 2 Detach thestopper plate and take out the deck Figure 3 219 Figure 3 220 COPYNICNT Q 1592 CANON I N C LTR TA4 A4 LTR Figure 3 221 5 ResettheDIPswitchonthedeckcontrollerPCB LEtter A4 Figure 3 222 6 Setthedeck attachthestopperplate andattach the rear cover CANON NPa20...

Page 200: ...ERVICING 1 PARTS TO BE REPIACED III PERIODICALSERVICING PERIODICALLY _ __ _ 4 1 P CHART _ ______ 4 1P II CONSUMABLES __ _ ____ 4 i P COPYRIGNT 0 1992 CdNON ING CANON NP2l20 2WO R N 0 MAY 1990 PGINTEG I N JAPAN IIMPRIME AU JAPONI ...

Page 201: ...rts name Parts No Q ty Life Remarks 1 Pick up roller FF9 1003 000 2 100 000 2 Feed roller FL9 0015000 1 100 000 3 Retard roller FL9 001 O 000 1 100 000 4 In deck registration roller FA5 8409 000 1 300 000 Note The figures in the table are estimated values and may be changed with operating experience Tabfe 4 l A Clean 0 Replace x Oil II Adjust Inspect Name of Unit Section Interval every 100 000 cop...

Page 202: ...NGEMENT AND FUNCTIONS III DC CONTAOLLER A 5P OF ELECTRICAL PARTS A l P II VARIABLE RESISTOR VR LED AND CHECK PIN BY PCB A 3P COPYAIGHT 0 1952 CANON ING CANON NPZlZO ZMO KV 0 MB 1590 PRINTEO IN JAPAN IIMPRIME AU JAPONI ...

Page 203: ...A P P E N D I X COPYRIGNT 0 1992 CANON INC CANDN NPz120 2020 MV 0 AMI 1990 PRINTUI I N JAPAN I M P R I M E AU JAPONI A IP ...

Page 204: ...switch MS2 Door openlclosed switch 0 M M o t o r Ml Deck motor 0 CL Clutch CL1 Lifter clutch CL2 Pick up clutch CL3 Registration roller clutch Solenoid SLI Pick up roller release solenoid Pedestal driver PCB 0 Drives each load in the pedestal A 2P COPYRIGHT 0 1542 C A N O N ING C A N O N NPZl20 2RZO R N 0 MAY INO PRINTEO I N J A P A N IIMPAIME AU JAPOI ...

Page 205: ...ts and checks using them call for special tools and instruments as well as high accuracy Do not touch them in the fields Note 1 Some LEDs emit light even when OFF because of leakage current 2 VRs that may be used in the field 0 VRs that may not be used in the fíeld ___ 1 Deck Controller 1 0 2 Jl 3 J5 1 El IRI 1 54 81J341 52 COPYAIGHT 0 1532 C A N O N INC C A N O N NPZ120 2620 nN MRY 1930 Pnitim I ...

Page 206: ...CAL INFORMATION DEPT COPYING MACHINE TECHNICAL INFORMATION DIV CANON INC Prlnted In Japan REVISION 0 MAY 1990 26313 REVISION 1 JAN 1992 1263131 REVISION 2 DEC 1992 26313 16756 890 12 Kashlmada Salwal ku Kawasakl shl Kanagawa 211 Japan d ...

Page 207: ...The printing paper contains The printing paper contains 70 reused paper 70 reused paper PAINTEO IN JAPAN IMPRIME AU JAPONI 12m2 7 8 I C PAINTEO IN JAPAN IMPRIME AU JAPONI 12m2 7 8 I C ...

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