Canon NP2120 Service Manual
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Canon NP2120 Service Manual

Canon NP2120 Service Manual

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C A N O N NPZl20/2020 REY.2 LIEC. 1992 PRINTEO IN JAPAN {IMPRIME AU JAPONI d

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  • Page 1 C A N O N NPZl20/2020 REY.2 LIEC. 1992 PRINTEO IN JAPAN {IMPRIME AU JAPONI d...
  • Page 2 Prepared by COPYING MACHINE TECHNICAL INFORMATION DEPT. . COPYING MACHINE TECHNICAL INFORMATION DIV. CANON INC. C A N O N NP212012MO REY.1 J A N . 1992 PAINTEU I N JAPAN IIMPAIME AU JAPUNI d...

  • Page 3: General Circuit Diagram

    A separate document entitled SERVICE HANDBOOK is also available for troubleshooting problems in the Note: The contents of this manual may be updated from time to time to reflect improvements rendered to the NP2120/ 2020; a Setvice Information Bulletin will be issued as necessary to cover majar changes.
  • Page 4 MOOEL: N O . : F-E92-043 DATE: 1992, DEC. NP2020 SERVICE MANUAL For 220/24OV The SERVICE MANUAL for the NP2020 has been revised to accommodate the and use the document attached for purposes for which the document is intended. P r i n t e d in Japan I m p r i m é...
  • Page 6 R E V I S I O N P A G E L I S T R: Replacement, S: Supplement, MODEL : NP21 20/2020 D: Destroyed, Page 1 CHAP CHAP REVISION MAY JAN. DEC. 1990 1992 1992 1990 1992 1992...
  • Page 7 R E V I S I O N P A G E L I S T R: Replacement, MODEL : NP2 120/2020 S: Supplement, D: Destroyed, Page 2 CHAP CHAP REVISION REVISION MAY JAN. DEC.
  • Page 8 R E V I S I O N P A G E L I S T R: Replacement, MODEL : NP2 120/2020 S: Supplement, D: Destroyed, Page 3...
  • Page 9 R E V I S I O N P A G E L I S T R: Replacement, MODEL : NP2120/2020 S: Supplement, D: Destroyed, Page 4...
  • Page 10 R E V I S I O N P A G E L I S T R: Replacement, MODEL : PAPER DECK PEDESTAL-Cl S: Supplement, D: Destroyed,...

  • Page 11: Table Of Contents

    B. Using the Service Mode ....3-56 E. Controlling the Development Bias..3-30 VII. SELF DIAGNOSTIC MECHANISM ..3-57 F. Measuring the Document Density..3-33 C A N O N NP2120/2020 RN.1 DLC. 1592 PRIHTEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 12 13. LIST OF SPECIAL TOOLS ....A-33 DC POWER SUPPLV PCB .._..<..A-26 14. LIST OF SOLVENT AND MATERIAL A-34 C A N O N NP2120/2MO RB.1 O E C . 1992 PRINTEO IH J A P A N IIMPAIME AU JAPONI...
  • Page 13 Further, sorted copies may be automatically may be automatically sorted and then stapled in stapled. sequence. CANON INC. C A N O N NP2120/2020 R E Y . 1 UEC. 1992 PRINTEO I N J A P A N IIMPAIME AU JAPONI...
  • Page 14 CHAPTER 1 GENERAL DESCRIPTION FEATURES........... V. WARNINGS AND ACTIONS SPECIFICATIONS ........ TOTAKE ..........I-12 ......ROUTINE WORK BY THE USER..1-14 OPERATION......... C A N O N NPZl20/2MO KV.0 M A Y 1990 PAINTEU I N JWAN IIMPRIME AU JAPONI...
  • Page 15 1. Front-loading. for ease of use (two cassettes holding 250 sheets copies of different sizes. 2. Full line of auto mechanisms. the correct reproduction ratio according to the specified copy size. 3. HQ jumping toner. photos. compact copier design. 4. Man-machine interface.

  • Page 16: Type

    Fixed Copyboard Light source Zoom lens Photosensitive medium Copying Corona Charging Exposure Copy density adjustment Automatic (AE) or manual Development 2 cassettes; multifeeder (NP2120) Automatic Manual feed tray (NP2020) Manual Transfer Corona Separation Cleaning Blade Heat roller (900 W) Fixing...
  • Page 17 Provided. (2 min, standard; may be disabled) Not provided. NP2120 only. Sorter-Al, MS-Al, Paper Deck Pedestal, Control Card V, CT Unit, Stapler Sorter-BI, Stapler Sorter-62 C A N O N NP2120/2020 REY.1 OEC. 1992 PAINTED I N J A P A N IIMPRIME AU JAPONI...

  • Page 18: Others

    C A N O N NPZl20/2MO NH.2 DEC. 1 9 9 2 PRINTEO I N J A P A N IIMPRIME AU JAPONI d...
  • Page 19 DIRECT REDUCE ENLARGE 1 : 1 (kO.5%) 1 : 0.500 (kl .O%) 1 : 1.224(fl.O%) 1 : 1.414 (fl.O%) 1 :0.816 (d.O%) 1 :2.000 (kl.O%) 1 :0.865 (fl.O%) 1 :0.500(*1.0%) 1 : 1 (?0.5%) 1 :1.214(+1.0%) 1 : 1.294(*1.0%) 1 :0.647 (il.O%) 1 :0.773 @l.O%) 1 :2.000 (*l.o%) 1 :0.786(+1.0%)
  • Page 20 Table l-3 Paper Size C A N O N NPZl20/2020 R N . 0 M A Y 1990 PRINTEO I N J A P A N IIMPNIME AU JAPON] 1 - 6...

  • Page 21: Externa1 View

    Drum unit Registration knob (NP2120) Delivery unit release lever Multifeeder (NP2120) Developing assembly release lever Figure I-2 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: Cross-Sectional View

    5. Cross-Sectional View 1. NP2020 Figure l-3 C A N O N NPZl2LVZMO AW.0 MAY 1990 PAINTED IN JAPAN IIMPRIME AU JAPUNI...
  • Page 23 2. NP2120 Figure l-3 a C A N O N NPZl20120’20 R N . 0 OK. l!X2 PRINNI I N J A P A N IIMPRIME AU JAPONI...

  • Page 24: Control Panel

    A. Control Panel A SIZE Figure l-4 Press the key to select the page separation A press on the key in the standby mode activates the pre-heat mode. mode. POWER indicator will go OFF. Press the key to select the SORTIGROUPINON- SORT mode;...
  • Page 25 50% and 200% in lo/, increments. tion. Hold down the key to change the COPY COUNT indicator notation from ratio to copy count. Press the key to return to the standard mode: deactivated). OEC. (IMPRIME AU JAPONI d CANON NPZl 2 0/2MO NN. JAPAN...

  • Page 26: Making Copies

    . NP2020 The COPY START key remains red. C. Using the Manual Feed Tray . NP2120 (NP2020) The COPY START key flashes green. If the temperature of the fixing assembly is 2) Press the DIRECT, REDUCE, ENLARGE, or key goes green.

  • Page 27: Making Overlay Copies

    Note: Donottiltorshakethedevelopingassembly modes on a single sheet of paper. 2. Do not place the developing assembly or CT unit on the floor; rather, keep them in storage boxes. H. Using the COPY DENSITY CORRECTION Lever If the copies are always dark or light, slide the lever to obtain the desired density.

  • Page 28: Atuo-Start (Np2120)

    The START indicator goes and remains red when and copy operation starts as soon as warm-up is wire is being cleaned or during the jam wait period. key. RESETkey,orSTOPkeyafteractivatingthe To cancel the auto-starl mode, press the RESET or CLEAR/STOP key. Note: The autostart mode will automatically be if the control card is not inserted, or if the right...

  • Page 29: Jam Indicator ( 8

    Work with care. Figure 1-8 Note: When removing paper from the separation NP2120 J a m in A D F unit Jam in copier J a m in sorter Figure 1-8 a...

  • Page 30: Add Paper Indicator ( & )

    7) Open the right cover, and check if paper is 1. Using the Multifeeder Tray (NP2120) jammed; remove the paper, if any. Furiher, check that no paper is sticking out of the Lift the lever, and pull out the jam, taking care not to cassette.

  • Page 31: Add Toner Indicator ( H

    2. CT Unit (mono color developing unit) C. ADD TONER Indicator ( h ) If the image seems too light in parts of a mono color The indicator goes ON when the black developing assembly is running out of toner. colortoner;...
  • Page 32 If separation jams occur frequently, clean the static eliminator using the cleaning brush (accessory) as necessary. C O P Y A I G N T Q 1992 CANON INC. C A N O N NPZlZO/ZGZl RN.1 JAN. 1992 PRINTEG IN JAPAN [IMPRIME AU JAPONI...

  • Page 33: Auxiliary Processes

    CHAPTER 2 COPYING PROCESS AUXILIARY PROCESSES ..__.._..___...
  • Page 34 C o p y b o a r d glass Transfer corona unit Figure 2-1 Step 4 Development (AC and negative DC) Step 5 Transfer corona exposure (negative DC) Images are formed in the following eight steps: Step 6 Separation Step 7 Fixing Pre-conditioning exposure Step 1...
  • Page 35 The pattern of charges so formed is not visible to the human eyeand, therefore, iscalled an electrostatic Figure 2-5 C A N O N NP2120/2MO R N . 0 M A Y 1990 PRINTEO I N J A P A N IIMPAIME AU JAPONI...
  • Page 36 C O P Y I N G P R O C E S S K#ZW 6. Step 4 Development of the drum is exposed to light from the pre- conditioning exposure lamp. All charges remaining theprimarycorona. Suchcharges, if leftastheyare, could result in copies with uneven density. 4.
  • Page 37 To prevent jams and toner offset, the upper roller remains in contact with the oil application roller impregnated with silicone oil. C A N O N NP2120/2MO RN.0 MAY 1990 PRINTEO IN JAPAN [IMPRIME AU JAPON) 2 - 4...
  • Page 38 10. Step 8 Drum cleaning Figure 2-14 In this step, the toner remaining on the drum surface the scoop-up sheet in preparation of the next copy C A H O N NPZl20/2MO KV.0 M A Y 1540 PAINTEO IN JAPAN IIMPRIME AU J A P O H ,...

  • Page 39: Blank Exposure Mechanism

    A. Blank Exposure Mechanism The blank exposure mechanism is used to remove the potential from the non-image sections of the drum in the REDUCTION mode or lo suit paper The light from the pre-exposure lamp is reflected by the reflecting plate and directed onto the photosensitive drum.
  • Page 40 CHAPTER 3 OPERATIONS AND TIMING paths. however, depends on the circuit. Nearly all operations of the copier are controlled by microprocessors; the interna1 workings of these processors are not relevant to the serviceman’s work and, therefore, left out of the discussions.
  • Page 41 O P E R A T I O N S A N D TIMING EXE&3 The copier can be divided into four functional blocks; pick-up/feed system, exposure system, image formation system, and control system. Figure 3-1 C A N O N NPZl20/2lVO AEV.tl MAY 1590 PRINTED I N JAPAN IIMPAIME AU JAPONI 3 - 1...
  • Page 42 Note: The main motor (Mi) is a synchronous motor thatusesthefrequencyofthepowersupplyas The copier is controlled by the two microprocessors and communication LSI on the DC controller PCB, motor (M3), on the other hand, are stepping 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...
  • Page 43 D C controller PCS . Lens h o m e p o s i t i o n position se”sor Microprocessor . T h e mistar . AE s e n s o r . S S R ON signa1 ( N P 2 1 2 0 ) .
  • Page 44 C. Inputs to DC Controller P C B W h e n lens is a t h o m e p o s i t i o n , ‘ 1 ’ . sensor - 2 . W h e n b l a n k s h u t t e r is at home position, ‘1’.
  • Page 45 w h e n transfer c o r o n a wire cleaner is a t h o m e p o s i t i o n (front), ‘0’. position switch w h e n transfer c o r o n a wire cfeaner is a t position switch - 1 1 ’...
  • Page 46 O P E R A T I O N S A N D T I M I N G D C controller P C B W h e n ‘o’, L E D O goes ON: w h e n d o c u m e n t is p r e s e n t , ‘0’.
  • Page 47 f - - - - - - - - - - - - - 1 - 1 2 - 1 1 1 V R 5 : a d j u s t s i m a g e l e a d i n g e d g e registration clutch ON timing for larger margin).
  • Page 48 D C conuoller P C B W h e n ‘ 0 ’ , RLI goes O F F : sae p . 3 . 4 7 . W h e n ‘i’, fixing heater goes ON. When ‘70’. main motor and scanner c o o l i n g fan go ON.
  • Page 49 O P E R A T I O N S A N D T I M I N G D C controller P C B F e e d e r roller c l u t c h 1 W h e n ‘0’. C L 1 goes ON. W h e n ‘0’.
  • Page 50 D C controller M o t o r driver P C S S e e p 3-18. motor W h e n ‘0’. t o t a l copy counter goes ON , “35y W h e n ‘0’. multifeeder ( N P 2 1 2 0 only) -2 ’...
  • Page 51 O P E R A T I O N S A N D T I M I N G N E. Basic Sequence N o t e : V a l u e in p a r e n t h e s e s indicatetemperature w h e n C T unit is in “...
  • Page 52 Period Description Remarks SCRV (scanner Whilethescanner is moving in Returns the scanner to the home position in prepara- reverse. tion for the next copy. Cleans the drum surface The last copy is delivered. LSTR until the main motorstops after electrostatically. (last rotation) thecopypaperhasmovedpast the delivery sensor.
  • Page 53 A. Varying the Reproduction Ratio The reproduction ratio across the drum (axial) is varied by the lens drive system and that around the bythescannerdrivesystem. The lens drive system contains a zoom lens and, as shown in Figure 3-11, the position of the lens and the focal distance are shifted to vary the reproduc- tion ratio across the drum.
  • Page 54 O P E R A T I O N S A N D T I M I N G B. Lens Drive System to the home position. When the lens reaches the home position, the lens drive motor rotates in re- verse;...
  • Page 55 O P E R A T I O N S A N D T I M I N G M B l a n k shutter B l a n k shutter drive E N L A R G E M E N T Figure 3-13 Lens Drive System (viewed from above) C A H O H HPZlZO/ZMO KV.0 M A Y 1590 PRIHIEO I N JAPAN IIMPAIME AU JAPOHI...
  • Page 56 O P E R A T I O N S A N D T I M I N G 2. Basic Sequence for Lens Drive System (reduction) C O P Y S T A R T k e y ON P O W E R s w i t c h ON D I R E C T B l a n k shulter solenoid ( S L 4 )
  • Page 57 O P E R A T I O N S ANO TIMING RSSZ Tostartthelensdrivemotor, LNSTBgoes’l’; and the motor is rotated by applying pulses on each The lens drive motor is a stepping motor and phase in sequence. rotatesin responsetothedrivepowersignal(LNSTB) When the lens drive motor is at rest, LNSTB is ‘0’; and pulse signals (LNA.
  • Page 58 C. Scanner Drive System the scanner moves forward, the motor speed is when the scanner mover in reverse, however, its ratio (3.5 times as fast as when moving forward). Thescannerisdrivenbythescannermotor(M2). The distance over which the scanner moves The scanner motor changes its direction of rotation to move the scanner forward and in reverse.
  • Page 59 Scanner Scanner sensor Description In reverse Scanner home position Table 3-2 COPY START key ON COPY START key ON Figure 3-17 C A N O N NPZl20/2CQO AB.0 M A Y 1590 PAINTEO I N JAPAN IIMPRIME AU JAPON,...
  • Page 60 4. fblovement of Scanner in Page Separation Mode (2 documents) D o c u m e n t l e a d i n g D o c u m e n t l e a d i n g e d g e o f Istpage e d g e o f istpage D o c u m e n t l e a d i n g...
  • Page 61 If the document is too thick and, therefore, if only When no document is present, the output of the circuit from the first measurement is low or none at C A N O N NP2120/2070 R N . 0 MAY 1590 PRINTEO I N JAPAN IIMPRIME AU JAPON] 3-21...
  • Page 62 D o c u m e n t i d e n t i f i c a t i o n circuit L E D Figure 3-20 Document Identification Timing C A N O N NP2120/2020 KV.0 M A Y 1990 PRINTEO IN JAPAN ( I M P R I M E AU JAPONI...
  • Page 63 O P E R A T I O N S A N D T I M I N G 3. Identification of Document Size Document identification circuit The DC controller identifies the size of docu- ments based on the levels of the output from the document identification circuit;...
  • Page 64 O P E R A T I O N S A N D T I M I N G grid bias voltage. A. Outline the developing assembly and drum cleaning unit. Figure 3-22 shows the construction of the image formation system, and the system has the following functions: a s s e m b l y L a m p regulator...

  • Page 65: B. Basic Sequence Of Image Formation

    O P E R A T I O N S A N D T I M I N G B. Basic Sequence of Image Formation C O P Y S T A R T kev P O W E R switch ON G r i d tias Figure 3-23 C A N O N NPZl20/2MO RN.0 M A V 1930 PAINTEO IN JAPAN IIMPAIME AU J A P O N I...
  • Page 66 C. Controlling the Scanning (LINT) from the DC controller PCB. The LINT signa1 varies between 10 and 16 V Lamp as determined by the copy density correction 1. Outline scanning lamp so that it varies between 50 and 75 V (phase control). The scanning lamp iscontrolled bythe DC controller PCB as follows;...
  • Page 67 Theerrordetectioncircuit alsogoesONwhenthe thermal fuse (Ful) or the scanning lamp blows, 75 --- , causing the relay (RLI) togo OFFandcuttingthe AC power. The above condition prevents generation of control panel. Copy Density Correction The copy density correction lever serves to pre- vent foggy images caused by deterioration of the photosensitive drum.
  • Page 68 Transfer Corona Current and the Grid Bías Voltage Figure 3-27 shows the circuii which controls the current for the primary/transfer corona unit and the generatorcircuit goes ON. functions: and OFF; flows from the primary corona unit because of backsignal totheifferentialamplifiercircuit increases corona unit.
  • Page 69 ler generates GRDON=l. circuit. former (T4). tor circuit. The above condition does not charge the drum and, as such, toner is not attracted to the photo- The voltage applied to the grid is returned to the comparator circuit. thereby providing a constant C A N O N NPZi20/2MO R N .
  • Page 70 2. Mechanism E. Controlling the Development Bias a. Tuming the Development Bias AC Component 1. Outline The square wave osciilatorcircuit is at work at all Figure 3-28 shows the circuit that controls the times as long as power is present. development bias and has the following functions: and OFF.
  • Page 71 O P E R A T I O N S A N D T I M I N G B The above condition supplies the developing b. Controlling the DC Bias Voltage Level cylinder with DC biases. DCBC varies between 6 and 16 Vas adiusted by the copy density key.
  • Page 72 3. Control Sequence for Development Bias C O P Y S T A R T k e y ON B 1 -, ó‘ G r i d b i a s Figure 3-29 density key and AE sensor output. The level of the DC bias during image exposure varies according to the type of developing assembly. exposure.
  • Page 73 F. Measuring the Document Density 1. Outline The copier has an automatic exposure (AE) mechanism, which controls the DC component of the development bias according to the density of the document. If the document is uniform in density, the N O T E : A development bias to enable reproduction of fog-free copies.
  • Page 74 6) Adjust VR1 (AE ref.) on the adjusting PCB so 4 . Adjustment that the copy counter on the control panel indi- cates ‘20’. The following adjustments should be made when the AE sensor or adjustment PCB has been re- placed;...
  • Page 75 8) Press the SORT/GROUP key after making ad- justments. 9) Press the push switch (SWI) on the adjusting 1) Remove the Test Sheet, place a newspaper on the copyboard, and close the copyboard cover. 2) Press the SORTIGROUP key on the control panel.
  • Page 76 G. Developing Assembly and 2. Monitoring the Toner Level Drum Cleaning Unit A piezoelectric oscillator toner sensor (Q9) is provided inside the black developing assembly to 1. Outline monitor the level of toner. long The blade and developing cylinder inside the as a specific level of toner is inside the assembly;...
  • Page 77 Blank shutter solenoid (SL4) B l a n k e x p o s u r e shuner Figure 3-36 C A N O N NP2120/2MO KV.0 M A Y 1990 PAINTEO I N J A P A N IIMPAIME AU JAPONI...
  • Page 78 1. Controlling the Transfer 2. Cleaning Niechanlsm Corona Wire Cleaning The wire cleaner is moved by the cleaner motor Mechanism (M4) back and forth once along the wire (about 20 When the wire cleaner mount moving folward by 1. Outline M4 actuates the microswitch (SW9) located at the rear of thetransfer rail, M4 rotates in reverse to move The copier has an automatic cleaning mecha-...
  • Page 79 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 by photointerrupters (Q6, Q7); if paper is absent, the cassette out signa1 (UPCPD, control panel starts to flash.
  • Page 80 OPERATIONS AND TIMING DC controller PCB Figure 3-39 CANON NPZl20/2020 RN.0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI 3-40...
  • Page 81 OPERATIONS AND TIMING 2. Sequence for Pick-up/Feed System COPY START key ON . Control Card V, if attached, ,ncreases the coun, when Figure 3-40 CANON NPZ120/2MO REY.0 MAY 1990 PAINTED IN JAPAN IIMPRIME AU JAPONI 3-41...
  • Page 82 A3 paper response. regardless of the size of the copy paper. DC confroller PCB Manual feed pi&up roller Figure 3-41 Feeder roller clutch 1 (CLl) Figure 3-42 3-42 CANON NPZl20/ZMO AEV.0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 83 Thepresenceofastackonthetrayis roller. the multifeeder paper sensor (Q8). The foregoing series of operations is executed for each pick-up. Multifeeder sensor Papa sensor lever Figure 3-39a CANON NPZ120/2MO RN.0 DEC. 1592 PAINTEO IN JAPAN [IMPRIME AU JAPON) 3-42a...
  • Page 84 Sequence of Operations (pick-up from multifeeder) COPY START key Figure 3-39b 3-42b CANON NPZl20/2020 RN.0 OEC. 1992 PRINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 85 OPERATIONS AND TIMING m B. Identifying the Cassette Size Based on the combinations of the switches which the presence/absence of a cassette as shown in The presence/absence of a cassette in the cas- Table 3-4 and, at the same time, determines where to reverse the scanner and how to control the blank switches (CSTI through CST4) provided in each shutter.
  • Page 86 DC controller PCB. In response, the DC 175°C control controller PCB compares the output timing of the HTRD signa1 and the SSR ON timing, issuing E004 upon identification of an error (applies to NP2120 only: see the SERVICE HANDBOOK). 155°C control Note: 165°C control Do not use the thermal switch (TS) once it has opened;...
  • Page 87 OFF as soon through. asthemainmotorstops ifthecopypaperisdelivered withjn 4 seconds. DC controller PCB 446°F) SSR ON ( N P 2 1 2 0 only) 1 Error detectrc Figure 3-43 CANON NPZl20/2020 RN.1 OEC. 1992 PAINTEO IN JAPAN IIMPRIME AO 3-45...
  • Page 88 When the copier enters the pre-heat mode in response 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.
  • Page 89 The lamp regulator generates LIGHT=l (scan- D. Error Detection Circuit ning lamp ON signal) at all times as long as the (NP2020) scanning lamp is ON. The above conditions cause the No. 2 compara- The error detection circuit is found on the DC tor of Q309 to generate ‘1’.
  • Page 90 The error AC shutoff relay (RLl) goes OFF in shutoff relay (RLl) is turned OFF immediately and response lo the output of the errordetection circuit in terms of both software and hardware. CANON NPZl20/2MO RN.0 OEC. 1992 PAINTED IN JAPAN (IMPRIME AU JAPONI...
  • Page 91 b. Detection by Hardware activation of the heater despite the absence of the heater drive signa1 (HTRD) generated by the microprocessor. under the following three conditions (A, B. C). thescanning IampONdetection signa1 (LGHT) leams that the scanning lamp remained ON idenlifies overheating (about 230°C) of the thermistor.
  • Page 92 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 Table 3-5. Table 3-5 3-47c CANON NPZl2012Ui’C NEV.0 DLC. 1992 PRINTEU IN JAPAN [IMPRIME AU JAPONI...
  • Page 93 No count is taken for jams which activate these The copier has mechanisms that remember the mechanisms. “remaining number of copies” and the “copy modes” Upper Separation sensor (as) Figure 3-46 3-48 CANON NP2120/2MO NEXO MAY IP30 PRINTEO IN JAPAN IIMPNIME AU JAPOH)
  • Page 94 ‘1 ‘1 Figure 3-47 Themicroprocessor identifies aseparationdelay (CL3) goes ON. jam if the paper fails reach the separation sensor Figure 3-48 3-49 CANON NPZl20/2U20 RN.0 MAY 1990 PAINlEO IN JAPAN IIMPNIME AU JAPONI...
  • Page 95 (Q5) detects the paper. The microprocessor identifies a delivery delay jam if the paper fails to reach the delivery sensor Jam check Figure 3-50 CANON NPZl20/2MO NN. MAY 1990 PAINTEO IN JAPAN IIMPNIME AU JAPONI 3-50...
  • Page 96 O P E R A T I O N S A N D T I M I N G sensorwithinaspecifictimeafterthedeliverysensor The microprocessor identifies a delivery station- Figure 3-51 C A N O N NP2,20/2MO RN.0 MAY 1990 PNINTEB IN JAPAN IIMPRIML AU 3-51...
  • Page 97 2. Protection Mechanism for Power Supply A. DC Power Supply The DC powersupply is equipped with protection mechanisms to cut off the power should any of the 1. Mechanism The protection mechanism for 24V power is the over-current detection mechanism in the switching The DC power supply PCB is supplied with AC regulator (Q204);...
  • Page 98 (0101) by correcting the relevant load oftheoption, and turning way of a photocoupler (Q102) for stabilization. the power ON once again. - -----------1 Figure 3-53 CANON NP2120/2020 NN. MAY 1990 PRINTEO IN JAPAN [IMPRIME AU JAPONI d 3-53...
  • Page 99 O P E R A T I O N S A N D T I M I N G POWER DC power 3-54 Figure CANON NP2l20/2MO RN.1 OEC. 1592 PNINTfU IN JAPAN UMPNIME AU JAPONI d 3-54 COPYNIGNT 8 1992 CANON INC.
  • Page 100 . The value indicated with the copyboard panel. EX. 18 0 1.8V The output voltage of ‘document size 2’ is indicated on the copy counter on the control panel. EX. 18 9 1.8V 3-55 CANON NPZl20/2MD RN.1 JAN. 1992 PRINlED IN JAPAN IIMPRIML AU JAPONI d...
  • Page 101 PCB to leave the service mode. 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. Figure 3-56 3-56 CANON NPZl20/2GZG RN.0 MAY 1990 PAINTEG IN JAPAN [IMPRIME AU JAPONI...
  • Page 102 (Q2) does not detect the blank shutter within 20 sec after the commencement of initial rotationoraftertheCOPY SART key has been pressed. The zero cross signa1 (ZXDP) has fluctu- ated. CANON NPZl20/2020 RN.2 OEC. 1952 PRINTEO IN JAPAN IIMPAIME AU JAPONI d 3-57...
  • Page 103 To clear ‘EOOO’, perform the following: 1) Remove the adjustment cover. 2) Turn the power OFF. 3) Press the setvice switch (SWI, on the adjustment PCB. 4) Tum the power OFF and ON. 3-58 CANON NPZl20/2MO MN.1 OEC. 1992 PAINTEO IN JAPAN IIMPAIME AU JAPGNI...

  • Page 104: B. Control Panel

    A. Developing Assembly _._,_.__..._.________ 4-25 C. Main Motor Unit ....... 4-12 VII. FIXING SYSTEM .__...___.._..._____....4-28 4-28 A. Fixing Assembly .._......A. Pick-Up Unit ........4-13 B. Feeder Unit ........4-16 CANON NPZWZMO RN.0 MAY 1990 PAINTEG IN JAPAN IIMPRIME AU JAPGNI...

  • Page 105: Control Panel

    NP2120 Covers that can be detached by mere removal of the screws are leff out of the procedure. Figure 4-l 4 - l CANON NPZIZOUXO REY.1 OEC. 1992 PAINTED IN JAPAN [IMPRIME AU JAPONI...
  • Page 106 Upper rear COYer Figure 4-3 Move the rear cover down until the four hooks Figure 4-6 are disengaged; thereafter, move it up to re- move. Figure 4-4 4 - 2 CANON NPZl2012MO REY.1 OEC. 1992 PAINTEO IN JAPAN [IMPRIME AU JAPON)
  • Page 107 Figure 4-7 Figure 4-9 3. Lower Front Cover 3) Detach the left coverfrom the lower front cover. screws. Lower front cover Figure 4-8 Figure 4-10 CANON NPZlZO/ZMO RN.1 OEC. 1592 PRINTEO IN JAPAN IIMPAIME AU JAPONI 4 - 3...
  • Page 108 If a sorter (sorter-Al) is attached, pull up left cover to remove. NP2120 Figure 4-13 3) Open the front right door 4) Open the right door lo remove: be careful with the lower front cover. CANON NPZlZO/ZMO REY.1 OEC. 1592 IN JAPAN IIMPAIME AU JAPONI...

  • Page 109: Fans

    1) Remove the inside cover. 2) Remove the five mounting screws and ground- of the copier. ing wire. and pull the control panel up to remove. Figure 4-16 Figure 4-15 CANON NPZlZO/ZMO MV.1 OEC. 1992 PAINTEO IN JAPAN [IMPRIME AU JAPON, 4 - 5...
  • Page 110 To remove the feeder fan, see p. 4-17 3. Exhaust Fan 1) Remove the rear cover. 2) Disconnect the connector (J37), and remove the mounting screw. Figure 4-18 4 - 6 CANON NP2120/2MO REY.1 OEC. 1992 PNINTEO IN JAPAN IIMPAIME AU JAPONI...
  • Page 111 M E C H A N I C A L S Y S T E M 1. Outline The lens drive system serves to drive both the lensandblankexposureshutter; thedriveisswitched by the blank shutter solenoid (SL4). Figure 4-20 CANON NPZl20Q~O MV.0 MAY 1930 PAINTEO IN JAPAN (IMPnIM[ AU JAPON] 4 - 7...

  • Page 112: Lens Dríve Unit

    M E C H A N I C A L S Y S T E M 3) Slide the scanner motor somewhat, remove the 2. Lens Drive Unit twomountingscrews,disconnecttheconnector, and remove the lens drive unit. 1) Remove the lamp regulator Lamp regulator Locking supports Figure 4-23...

  • Page 113: Scanner Drive Unit

    2) Loosen screw A, and detach the scanner cable. 3) Tighten screw B. CANON llP2120/2020 RN.0 MAY 1930 PAIHTEO IN JAPAH IIMPAIME AU JAPONI 4 - 9...
  • Page 114 A. 3) Place a blank sheet of paper on the copyboard, and feed the paper marked with lines in the manual mode: B. 4-l 0 CANON NP2l20/2@20 RN.1 JAN. 1592 PAINTED IN JAPAN IIMPAIME AU JAPONI...
  • Page 115 Move the No. 1 mirror mount in the direction of a. Move the No. 1 mirror mount in the direction of b. Note: and if too long, reduced. No. 1 mirror mount CANON NPZlZWZMO RN.0 MAY 15’30 PAINTEO IN JAPAN (IMPRIME AU JAPONI 4-11...

  • Page 116: Main Motor Unit

    400 Cl00 g, and fix it in place when it stops; see Figure 4-31. Idle support plate Figure 4-31 Figure 4-29 4-12 CANON NPZl20/2MO RN.0 MAY 19917 PNINTEO IN JAPAN IIMPRIME AU JAPONI...

  • Page 117: Pick-Up Unit

    (mar) No pick-up roller for No notes are given atmve for mounöng and inch systems alike. Figure 4-33a (viewed from above) Flgure 4-35 Figure 4-33b (viewed from above) 4-13 CANON NP2120/2MO RN.0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI...
  • Page 118 Figure 4-36 3) Remove the spacer E-ring, and tension spring @ E-ring Figure 4-37 5) Open the front door, and remove the inside covers (left, right). 4 - 1 4 CANON NP2,20/2020 RN.0 MAY 1990 PAINTED IN JAPAN IIMPAIME AU JAPONI...
  • Page 119 Open the front door, and remove the inside Open the front door, and remove the inside covers (left, right). covers (left, right). feeder oller. feeder oller. Figure 4-44 Figure 4-41 CANON NPZl20/2MO REY.0 MAY 1590 PAINTEO IN JAPAN [IMPRIME AU JAPONI 4 - 1 5...
  • Page 120 Figure 4-441~ Figure 4-44a 3) Remove the four screws, and detach the 3) Take out the separation pad into the direction of multifeeder assembly. the arrow. Figure 4-44d Figure 4-44b CANON NPZl20/2020 REY.0 OEC. 1592 PAINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 121 Figure 4-4421 Figure 4-44e 3) Remove the E-ring (plastic), and move the bus- ing in the direction of the arrow. Figure 4-441 CANON NP2l20/ZMO AN. OEC. 1592 PAINTEG IN JAPAN [IMPRIME AU JAPON) 4-15 b...

  • Page 122: Feeder Unit

    4) Remove the insioe leftcover, and remove the E- B. Feeder Unit ring and bushing. 1. Feeder Unit Note: Make sure that the drum unit, transfercorona 1) Relpace the feeder unit. 2) Remove the main motor unit. 3) Disconnect the connector (J309) from the DC controller PCB, and remove the grounding wire.
  • Page 123 3) Remove the three screws, and remove theelec- trode holder at the rear. Disconnect the connector, disengage the hook. and remove the feeder fan. Figure 4-50 Feeder fan Hook Figure 4-52 CANON NPZl20/2MO AEV.0 MAY 1590 PRINTEU IN JAPAN IIMPAIME AU JAPONI 4-l 7...

  • Page 124: Illuminating Unit

    4) Push the lamp electrode plate (rear) in the direction of the arrow. and remove the scanning lamp. Figure 4-55 3) Remove the two mounting screws, and remove the thermal fuse. Figure 4-54 CANON NPZl2012020 RN.0 MAY 1990 PRINTEO IN JAPAN IIMPRIME AU JAPONI 4-l 8...

  • Page 125: Blank Exposure Unit

    2) Mark the blank exposure shutter home position sensor on the lens mount using a scriber, and Figure 4-57 3) Disconnect the connector (J731) from the pre- Figure 4-59 exposure PCB. 4-l 9 CANON NPZl20/2MO AN. MAY 1990 PRINTEG IN JAPAN IIMPAIME AU JAPONI...
  • Page 126 Put the mirror cleaning tool against the No. 5 Using the Mirror Cleaning Tool mirror as shown in Figure 4-62, and clean the No. 6 mirror mirror by sliding the tool. No. 4 mirror Figure 4-60 Cleaning the No. 5 R%irror andremovethemirrorcleaning toolfromthelens mount;...

  • Page 127: Drum Unit

    Note: Do not press the COPY START key. CANON NPZl2tWU20 KV.0 MAY 1590 PNINTEO IN JAPAN IIMPAIME AU JAPONI 4-21...

  • Page 128: Primary And Transfer Corona Units

    2) Pull out the static eliminator. 2 ) Disengagethetwohooks,andpuIIouttheprimary corona unit from the drum unit Figure 4-67 3) Disengage the three hooks, and remove the Figure 4-65 Figure 4-68 4-22 CANON NPZl20/2MO RN.0 MAY 1990 PAINTEO IN JAPAN IIMPAIME AU JAPONI...
  • Page 129 12 mm. n Check that the corona wire is fitted along 4-23 CANON NPZf20/2MO RN.0 MAY 1990 PRINTED IN JAPAN IIMPRIME AU JAPONI...
  • Page 130 3) Slidethetransfercoronaunit intothecopier, and check that the pins of the wire cleaner are inside the wire cleaner unit. 4) Mount the transfer corona unit cover. CANON HPZIZORMO RN.0 MAY IV30 PRINIEO IN JAPAN IIMPRIME AU JAPONI 4 - 2 4...

  • Page 131: Developing Assembly

    Turn the developing assembly release lever developing assembly of toner. counterclockwise. mount together with the mount. Hold the grip of the developing assembly, and Figure 4-75 Fiaure 4-73 4-25 CANON NPZl20/ZOi!O REi. MAY 1930 PRINTED IN JAPAN IIMPRIME AU JAPONI...
  • Page 132 10) Remove the two screws, and remove the developing roll. developing cylinder holder (rear), ball bearing, and developing roll. Figure 4-77 Figure 4-79 11) Remove the developing cylinder and side seal. 4-26 CANON NPZlZO/ZMO KV.0 MAY 1990 PAINYEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 133 Figure 4-81 (cross section) Note: together as shown, and attach them around the developing assembly. positioned as shown in Figure 4-81. 4-27 CANON NPZf20/2CQO REY.1 JAN. 1592 PRINTEO IN JAPAN IIMPAIME AU JAPON]...

  • Page 134: Fixing Assembly

    2. Remowing Fixing Assembly 1) Open the front cover, and remove the fixing A. Fixing Assembly assembly knob. 1. Construction Fixing assembly knob Mounting screw Figure 4-65 Disconnect the three connectors. the fixing assembly. Figure 4-84 Figure 4-86 4-28 C A N O N NPZl20/2MO RN.0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 135 M E C H A N I C A L S Y S T E M mm 4. Upper Fixing Roller 3. Fixing Heater 1) Hold the grip of the oil application roller, and pull to the front while lifting to remove the roller. Fastons Figure 4-87 Figure 4-90...
  • Page 136 Figure 4-94 against din and scratches. 7) Remove the C-ring at the rear of the fixing two C-rings are to the rear. assembly, and remove the gear Figure 4-95 CANON NPZlZO/ZMO RN.0 MAY 1990 PRINTEO IN JAPAN [IMPRIME AU JAPONI 4-30...
  • Page 137 15 seconds, and turn the knob further to remove the copy paper from the fixing assembly. 4) Measure the width over which the toner is shiny; 4-31 CANON NPZ120/2MO REY.2 OEC. IN92 PAINTEB IN JAPAN [IMPRIME AU JAPNNI...
  • Page 138 Do not use mounting screws otherthan those specified. Figure 4-l 01 Thermal switch Thermal switch upper roller Figure 4-l OO 4 - 3 2 C A N O N NP2120/2MO REY.0 MA” 1990 PAINTED IN JAPAN IIMPRIME AU JAPONI...
  • Page 139 @ Lower separation guide plate Figure 4-102 Figure 4-103 4) Remove the spring, and remove the upper separation claw. 3) Remove the spring, and remove the lower separation claw. CANON NP2¡20/2MO RN.0 MAY 1990 PRINTEU IN JAPAN IIMPAIME AU JAPONI 4 - 3 3...

  • Page 140: Unpacking And Installing The Copier

    CHAPTER 5 INSTALLATION Thecopieriscarefullyacljustedandstrictlyinspected beforeitleavesthefactoryand, therefore, proper installation is very important in maintaining its out-of-factory performance. Make sure that necessary inspections after installation. SETTING THE CT UNIT ....... 5-13 LOCATION ........... 5-l UNPACKING AND INSTALLING RELOCATING THE COPIER ....5-14 THE COPIER ........
  • Page 141 2 m (78.7 in.) min. - (2.1 mJ32 7 in. min II NP2120) A. The ambient temperature should be between Figure 5-1 1 O%to80%. Avoid locationsnearwaterfaucets, humidifiers, water boilers, and refrigerators.
  • Page 142 Open the cardboard box, and take out the parts and accessories. settes: remove the cushion blocks from CANON N?Zl20/2MO RN.1 OEC. 1992 PRINTEO IN JAPAN IIMPNIML AU JAPONI 5 - 2...
  • Page 143 INSTALLATION Remarks Fixing for optical unit Open the front cover, and disengage the developing assembly, and remove it from the copier. unit and fixing assembly. C A N O N N?Zl20/2070 REY.1 DEC. 1992 PNINlEO IN JAPAN IIMPRIME AU JAPON) 5 - 3...
  • Page 144 Open the delivery cover, and remove the two fixing roller release rolls. The reafter, close the delivery cover. CANON N?Zl29/2MO RN.2 DEC. 1992 PRINTED IN JAPAN IIMPAIME AU JAPONI 5 - 4...
  • Page 145 Move the grip to clean the corona wire of the drum unit two to three times. Set the developing assembly in the copier, The front cover may be left open. and engage t. CANON N?2l20/2~0 REY.0 OEC. 1992 PAINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 146 C. Checking the Operation C A N O N NP212012MO REY.1 OEC. 1992 PAINTEO IN JAPAN IIMPAIME AU JAPONI 5 - 5...
  • Page 147 D. Aciding Toner Glose the developing assembly lid, and Turn the developing assembly lever key goes green, and make six to ten CANON NPZlZO/ZMO RN.0 MAY IPJO PRINTEO IN JAPAN IIMPRIME AU JAPONI 5 - 6...

  • Page 148: E. Checking The Image

    Feed paper in the manual mode. Make tow-sided and overlay copies, and check that the operation is correct; otherwise, make adjustments. Check pick-up by the multifeeder (NP2120). Put the OPERATOR’S MANUAL in the pocket of the copyboard cover. When all above work is finished, install the options (ADF-Al, MS-Al, Sorter-Al, Stapler Sorter-Bl , Stapler Installation off the dirt using a flannel cloth coated with toner.
  • Page 149 plate (11.7’X16.5”) The copier’s cassette may be modified to suit the desired paper size by modifying the rear stop plate, spring, and face plate. Government Letter 1) Turn over the cassette, and remove the screw that holds the rear stop plate in place. Bottom of cassette Legal Argentine Letter...
  • Page 150 Slide the paper size plate along the index on the bottom of the cassette to suit the desired paper size. Figure 5-4 Figure 5-7 3) Fixthestopplate inplaceusingscrews(M4XlO). Place about 100 sheets of paper (fresh out of package, of thedesired size) in thecassette, and Note: butt them against the front of the cassette.
  • Page 151 10) Set the cassette size roll; see Table 5-2. 1 1 x 1 7 Argentine Letter Government Letter Argentine Legal Government Lener-R Government Legal Argentine Lener-R Foolscap Letter Argentine Legal, Foolscap, Korean Ledger-R Government Legal, Folio Australian Foolscap, Officio, Ecuadorean Officio, Table 5-3 Government Letter, Argentine Letter, Korean Ledger...
  • Page 152 copies by modifying the cassette spring as shown Figure 5-I 1 Table 5-4 ARGENTINE LTR Set the inside plate, and attach the rubber GOVERNMENT LTR stoppers. KOREAN ARGENTINE LGL GOVERNMENT LGL ARGENTINE LTR-R GOVERNMENT LTR-R FOOLSCAP FOLIO AUSTRALIAN FOOLSCAP KOREAN-R ECUADORAN OFICIO plate.
  • Page 153 KOREAN, or KOREAN-R, remove the pick-up rollers shown below (metric rollers). Figure 5-15 CANON NPZl20/2MO REY.0 MAY ,990 PRINTEO IN JAPAH IIMPRIME AU JAPON) 5 - 1 2...
  • Page 154 4) if the image is uneven. Set the CT unit in thecopier, and pull the orange out; straight thereafter, close the front door. Figure 5-17 Figure 5-20 CANON NPZlZO/ZMO RN.0 MAY 1990 PAINTEil IN JAPAN IIMPRIME AU JAPORI 5-l 3...
  • Page 155 Tape the front door and delivety unit. Place a sheet of A3 or 11 “X1 7” paper on the copyboard glass, and tape the copyboard cover. CANON NPZ,20,2MO WV.0 MAY 1990 PAINTEO IN JAPAN IIMPRIME AU JAPONI 5-14...
  • Page 156 Figure 5-24 Hole Figure 5-22 Fix Control Card V on the control panel using four mounting screws. Card V where the card can be slid in and out CANON NP21'20/2020 REY.0 MAY 1990 PRINTED IN JAPAN IIMPRIME AU JAPONI 5-15...
  • Page 157 Card Von the control panel of the copier. Figure 5-27 14) Turn the copier ON, and check the operation of Control Card V. 15) Attach the inside right cover. CANON NPZl20/2MD RN.1 JAN. 1592 PAINTED IN JAPAN IIMPAIME AU JAPONI...
  • Page 158 2. NP2120 NP2020 1) Fit the mounting screws in the holes shown, and attach the document tray; see Figure 5-30. The document holder may be attached to the left 01 of the holder on the left cover side. 1) Remove the two screws of the left cover.
  • Page 159 CHAPTER 6 MAINTENANCE AND SERVICING PERIODICALSERVICING CHART..6-4 PERIODICALLY REPLACED PARTS .. 6-i l l . CONSUMABLES ........6-2 PERIODICALSERVICING ....6-3 C A N O N NPZl2012mO R N . 0 M A Y 1990 PAINTEU IN JAPAN IIMPRIME AU JAPONI...
  • Page 160 regardless of damage or wear, since they can affect the very operation of the machine when they fail. Replace as of July 1992 Developing roll (rear; developing 500,000 assembly) Note: The above are estimates only and subject to change to reflect data from the field. C A N O N NPZl20/2MO AN.I OEC.
  • Page 161 300.000 220v 300,000 240V Developing cylinder (developing 300,000 Upper feeder roller (NP2120) 300,000 Lower feeder roller (NP21 20) 300,000 Note: The values above are estimates only and subject to change based on future data. C A N O N NPZlZO/Z&?O AN. OEC. 1992 PAINTED I N J A P A N IIMPAIME AU JAPONI d...
  • Page 162 MAINTENANCE AND SERVICING tZZi?B Note: As a rule, conduct the following wok every 20,000 copies. 2. Check the service record before paying a vis%, and take replacement parts if necessary. Work Remarks Meet the operator. Check the condition. Record the counter reading. Check the faulty copies.
  • Page 163 Note: Do not use solvents or oils other than those specified. X: Oil 0: Adjust 0: Check Remarks 6 - 4 C A N O N NPZl20/2MO KV.0 MAY ,930 PRINTEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 164 APPENDIX GENERAL TIMING CHART....9. ADJUSTING PC0 ......... A-26 SIGNALS AND ABBREVIATIONS..10. PRE-EXPOSURE LAMP ....... A-29 GENERAL CIRCUIT DIAGRAM.... 11. AE SENSOR ......... A-30 WIRING ....... 12. HVT ............A-31 DC CONTROLLER PCB ....... A-l 1 13.
  • Page 165 2. SIGNALS AND A Signals ACBON ACOFF AEGIN BTEP BLACK TONER EMPTY signa1 COPYBOARD COVER CLOSED signa1 1 COPYBOARD COVER CLOSED signa1 2 CBCC2 CONTROL CARD CONNECT signa1 CCNNT CONTROL COUNTER DRIVE command CCNTD CLEANING MOTOR COUNTERCLOCKWISE command CLEANING MOTOR CLOCKWISE command csz 0 CASSETTE SIZE signa1 1 csz 1...
  • Page 166 TCNTD TOTAL COUNTER DRIVE command FIXING ROLLER SURFACE TERMPERATURE signa1 UPPER CASSETTE PAPER DETECTION signa1 UCPD WCHP CORONA WIRE CLEANER HOME POSITION signa1 WCRP CORONA WIRE CLEANER REAR POSTION signa1 ZXDP Abbreviations INTR LSTR LAST ROTATION SCFW SCANNER FORWARD SCRV SCANNER REVERSE STBY STANDBY...
  • Page 170 WIRING DIAGRAM (NP2020lA603) Motor driver PCB DC power supply PC6 CANON NPZl20/2CQO AEV.0 MAY 1990 PRINTEU IN JAPAN IIMPRIME AU JAPONI A - 9...

  • Page 174: Dc Power Supply Pcb

    A P P E N D I X W WIRING DIAGRAM (NP2120/A603) Motor driver WI3 24VA GND12 DC power supply PCB 1 2 v...
  • Page 175 WIRING DIAGRAM (NP2020/A604) 9 1 0 1 1 1 2 A-10 CANON NPZl20/2CQO AN.f JAN. 1932 PAINTED IN JAPAN IIMPAIME AU JAPON,...
  • Page 176 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. A - 3 3 CANON NPZlZWZMO AEV.0 MAY 1990 PAINTEO IN JAPAH IIMPRIME AU JAPONI...
  • Page 177 Avoid contact with eyes orskin. Do not use for cleaning the durm molded plastic parts, or corona Lubricating the CANON Tool No.: CK-0427 (500glcan) drive mechanisms; (Equivalent grease can be used, but should be able to withstand driving gear, fixing drive gear, fixing time.)
  • Page 178 CANON NP2l20/2020 KV.0 MAY 1990 PAINTEO IN JAPAN [IMPRIME AU JAPON)
  • Page 179 OF ELECTRICAL PARTS .______..___.__..A-l P VARIABLE RESISTOR (VR), LED, AND CHECK PIN BY PCB ._....A-3P C A N O N NP2120/2020 REY.0 M A Y 1930 PRINTEO IN JAPAN [ I M P R I M E AU JAPONI...

  • Page 180: Specification

    CHAPTER 1 GENERAL DESCRIPTION I I . CROSS-SECTIONALV~EW ._..________. SPECIFICATION .._.______....l-1P C A N O N NW,ZO/ZMO KV.0 MAY 1990 PRINW I N J A P A N IIMPRIME AU JAPON)
  • Page 181 610 (W) x 577 (D) x 429 (H) mm (24.0 (W) x 22.7 (D) x 16.9 (H) in) Dimensions 28 kg161.7 Ib Weight l - l P C A N O N NP2120/ZET BEY.0 MAY 1930 PAINTED I N JAPAN IIMPAIME AU JAPONI d...
  • Page 182 Figure l-201 C A N O N NPZl2012MO KV.0 M A Y 1 9 9 0 PAINTED I N JAPAN IIMPRIME AU JAPONI l - 2 P...

  • Page 183: Basic Constructions

    CHAPTER 2 OPERATIONS AND TIli/lING In outline diagrams,-+represents mechanical drive paths, and = indicates electrical signa1 paths. however, depends on the circuít. Nearly all operations of the copíer are controlled by microprocessors; the interna1 workings of these processors are not relevant to the serviceman’s work and, therefore, left out of the discussions.
  • Page 184 In response to the signals from the copier and from its own microswitches and sensors, the pedes- and clutches. Figure Z-201 is a block diagram showing the relationship among the pedestal3 majar circuits. The paper deck pedestal is controlled by signals The pedestal is supplied with 24 V, 5 V, and 115V from its host copier and from its own controller.
  • Page 185 P D P 2 When C?ZZ detecb L T D Whsn Q23 dstects ,iffet, ‘ C D Vhen ‘0’. CL2 goes ON. F i g u r e 2 - 2 0 2 CANON NPZf20/ZU20 RN.0 MAY 1590 PAINTED IN JAPAN [IMPRIME AU JAPON]...

  • Page 186: Inputs To And Outputs From Paper Deck Controller

    B. Inputs to and Outputs from Paper Deck Controller (2/2) DC controller PCS ‘1’. F i g u r e 2 - 2 0 3 CANON NP2,20,2@0 mV.0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI...
  • Page 187 , and registra- The lifterlowers on itsown weightwhen thepaper tion rollers. deck is pulled out, releasing the gears. F i g u r e 2 - 2 0 4 CANON NPZl20/ZMO KV.0 MAY 1990 PAINTEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 188 O P E R A T I O N S ANDTLMING m D. Pick-up and Feed Operations copying machine; drive is then transmitted to the pick-up and registration rollers by way of clutches. The clutches in turn are under control of the The paper deck picks up and feeds the paper in signals from the copying machine.
  • Page 189 (1) Sequence of Pick-up and Feed Operations Figure 2-206 CANON NPZl20/2MO RN.0 MAY 1990 PAINTED IN JAPAN IIMPAIME AU JAPON)
  • Page 190 The arm is also used to release the pick-up roller during pick-up operation. Figure 2-207 CANON NPZl20/2020 REY.0 MAY 1990 PAINTEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 191 2. Releasing the Separation Roller Theseparation rolleris releasedwhen thecamon the deck side plate comes off the release lever roller. Figure Figure 2-209 CANON NPZl20/2GZO EV.0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI...
  • Page 192 DRIVE SYSTEM .._____...... 3-4P (FRONT, REAR) ..____...... M O D I N I N G T H E DEC SIZE ..3-7P CANON NPZlZO/ZMO RN.0 MAY 1990 PRINTEA IN JAPAN IIMPRIME AU JAPON)

  • Page 193: Pick-Up Roller

    1) Remove the rear cover from the pedestal. Figure 3-203 4) RemovetheE-ring, anddetachthepick-uproller (front);thereafter, pulloutthepick-uproller(rear) together with its shaft. Figure 3-201 2) Remove the deck stopper plate. Figure 3-202 Figure 3-204 3-l P CANON NPZl20/2WZO RN.0 MAY 192.0 PNINTEO IN JAPAN IIMPRIME AU JAPONI...

  • Page 194: Feed Roller

    2) Open the right door of the pedestal. 3) Remove the two stop rings, and detach the separation roller. Figure 3-207 Figure 3-205 Note: Take care; the feed roller has its own orienta- tion. Figure 3-206 CANON NP2120/2MO NB.0 MAY 1990 PAINYEU IN JAPAN IIMPNIME AU JAPONI...

  • Page 195: Registration Roller

    M E C H A N I C A L S Y S T E M D. Registration Roller 1 ) Detachthedeckdriveunit;seethediscussionon removing the deck drive unit. See p. 3-4P. 2) Remove the E-ring at the rear and the spring. Figure 3-208 3) Remove the E-ring at the front, and detach the gear;...

  • Page 196: Deck Drive Unit

    Figure 3-210 4) Detach the deck stopper plate, and pull out the deck. 5) Detach the right cover from the pedestal. Figure 3-213 Figure 3-211 CANON NPZi20/2O70 RN.0 MAY 1990 PAINYEO IN JAPAN [IMPRIME AU JAPONI...
  • Page 197 1) Slide out the deck. The registration at the front and rear for the pedestal should be as shown in Figure 3-214. Iftheregistrationisotherwise, makethefollowing adjustments. Figure 3-215 2) Loosen the four mounting screws on the front Figure 3-214 plate. Grip plate Figure 3-216 C A N O N NPZl20/2070 RN.0 MB 1590 PRINTED IN JAPAN IIMPRIME AU JAPONI...
  • Page 198 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. CANON NP2l20/2G20 RN.0 MAY 1990 PRINTUI IN JAPAN IIMPRIME AU JAPONI...
  • Page 199 M E C H A N I C A L S Y S T E M 3) Detach the three partitions. 4) Fit the partitions into the holes corresponding to the desired size. Use a sheet of thedesired size as referente to facilitate the work.

  • Page 200: Parts To Be Replaced

    CHAPTER 4 PARTS TO BE REPIACED CHART .._.______....... PERIODICALLY _..__._...... 4-1 P CONSUMABLES __._..____....4-i P...
  • Page 201 The figures in the table are estimated values and may be changed with operating experience. Tabfe 4-l x: Oil Section Interval Remarks Unit every 100,000 copies Apply oil 4-l P CANON NPZ12012MO RE”.0 MAY 1990 PRINTEO IN JAPAN (IMPAIME AU JAPONI...

  • Page 202: Of Electrical Parts

    APPENDIX ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS...... A-l P VARIABLE RESISTOR (VR), LED, AND CHECK PIN BY PCB ....A-3P CANON NPZlZO/ZMO KV.0 MB 1590 PRINTEO IN JAPAN IIMPRIME AU JAPONI...
  • Page 203 A P P E N D I X...
  • Page 204 Symbol Notation Function Photointerrupter .Paper sensor Pre-registration sensor Lifter position sensor Microswitch Upper limit switch Door openlclosed switch M o t o r Deck motor Clutch Lifter clutch Registration roller clutch Solenoid Pedestal driver PCB Drives each load in the pedestal. C A N O N NPZl20/2RZO R N .
  • Page 205 Discussion will be limited to thevariable resistors (VR), LEDs, and checkpins that can be used in the field from among those the copying machine is equipped with. Those not discussed are for adjustment at the factory only, and adjustments and checks using them call for Note: 1.
  • Page 206 Prepared by COPYING MACHINE TECHNICAL 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]...
  • Page 207 The printing paper contains The printing paper contains 70% reused paper. 70% reused paper.

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