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  5. Maintenance Manual

Oki Microline 320 Turbo D1 Maintenance Manual

Other manuals for Microline 320 Turbo D1: User Manual, Product Update, Brochure & Specs, Product Update, Handbook
Manual is about: 9 Pin Printer

Summary of Microline 320 Turbo D1

  • Page 1

    Oki data confidential 1 2 3 4 5 6 rev date dco no. Contents design approval bom use for certification body approval check date drawing no. Name design ..................................................................................................... ..................................................

  • Page 2

    42089201th rev.4 2 / oki data confidential 1 2002-03-28 issue 2 2006-11-01 for rohs ods m.Kanno 3 2007-03-30 for energy star ods m.Kanno 4 2009-02-17 50, 69 addition of “warning”, ep5 t. Sugiyama etc. Rev.No. Date no. Corrected items page description of change person in change document revision hist...

  • Page 3: Preface

    42089201th rev.4 3 / oki data confidential preface this maintenance manual describes how to maintain the microline 320/321turbo,microline 3320/3321 printer in the field. This manual is for customer engineers. For further information, refer to the users manual for handling or operating the equipment....

  • Page 4: Contents

    42089201th rev.4 4 / oki data confidential contents 1. Configuration ...........................................................................................6 1.1. Standard printer configuration ..................................................................................... 6 1.2 options .....

  • Page 5

    42089201th rev.4 5 / oki data confidential 3.3.21 rear pressure assy ...................................................................................... 75 3.3.22 switch lever .................................................................................................. 76 4. Adjustment ........

  • Page 6: Configuration

    42089201th rev.4 6 / oki data confidential 1. Configuration 1.1. Standard printer configuration this printer consists of the following assemblies: figure 1-1 configuration sheet guide assy platen knob access cover assy upper cover control/power supply assy traansformer assy pull-up roller assy opera...

  • Page 7

    42089201th rev.4 7 / oki data confidential 1.2 options (1) cut sheet feeder unit (csf) (narrow and wide versions available) dual-bin csf single-bin csf attachment assy (2) pull-tractor assy.

  • Page 8

    42089201th rev.4 8 / oki data confidential (3) bottom push tractor unit (5) option i/f board • rs232c • rs422a • current loop • nic (network version only) (4) roll paper stand (narrow only).

  • Page 9: Theory of Operation

    42089201th rev.4 9 / oki data confidential 2. Theory of operation 2.1 electrical operation the electrical operation of the printer circuit is described in this section. 2.1.1 summary fig. 2-1 shows the block diagram of the printer. The control board is made up of the microprocessors, peripheral circ...

  • Page 10

    42089201th rev.4 10 / oki data confidential figure 2-1 htemp 12.288 mhz 4 vcc-level htemp swrd headgap a/d pe-sensor operation panel serial alarm -circuit hd alarm power-off transformer rectifier circuit regulaticn circuit 40 volt 8 volt 5 volt 15 volt reset circuit swrd i/f-ipt print-ipt eeprom 1kb...

  • Page 11

    42089201th rev.4 11 / oki data confidential (2) program rom this is a 256k/512k/1024k × 16 bits (4/8/16m bit) mask rom or flash rom with the control program for the printer stored. The mpu executes instructions under this program. The program rom is assigned to the program memory area of the mpu and...

  • Page 12

    42089201th rev.4 12 / oki data confidential (3) ram the ram is cmos dynamic ram with 256k × 16bits (4mbit), and used as buffers (such as receiving buffer, printing buffer, dll buffer and working buffer). The following shows the examples of the memory access operation. A0~a7 cas-n ucas-n lcas-n we-n ...

  • Page 13

    42089201th rev.4 13 / oki data confidential (4) eeprom the eeprom is a cmos serial i/o type memory which is capable of electrically erasing and writing 1,024 bits. The eeprom contains menu data. The following shows the memory access operation. Mpu eeprom eedin-p eecs-p eedout-p eeclk-p p24 p27 p25 p...

  • Page 14

    42089201th rev.4 14 / oki data confidential (5) lsi this lsi detects and controls the sp motor speeds by monitoring the two phase sensor signals obtained from the dc motors and modifying the excitation phases as appropriate. This lsi is connected in multiplex to the mpu. P07 mpu a/d bus lsi rd wrl p...

  • Page 15

    42089201th rev.4 15 / oki data confidential 2.1.3 initialization this printer is initialized when the power is turned on or when the i-prime-n signal is input from the host side via the parallel interface. For the initializing operation, the rst-n signal is first output from the reset circuit to res...

  • Page 16

    42089201th rev.4 16 / oki data confidential 2.1.4 parallel interface control the parallel data input from the host to the interfaced lsi is latched to its internal register at the falling edge of the strobe-n signal. At the same time, the lsi sets the busy signal to the high level to inform the host...

  • Page 17

    42089201th rev.4 17 / oki data confidential 2.1.5 universal serial bus (usb) (at usb ver.) universal serial bus specification revision 1.0 compliance. 1) connector • printer side : “b” receptacle (upstream input to the usb device) • cable side : series “b” plug 2) cable • cable length : approx 1.8m ...

  • Page 18

    42089201th rev.4 18 / oki data confidential 9) signal level • input / output level parameter input levels : high (driven) high (floating) low output levels : low high (driven) output signal crossover voltage symbol v ih v ihz v il ol oh v crs min. 2.0 2.7 0.0 2.8 1.3 max. 3.6 0.8 0.3 3.6 2.0 units v...

  • Page 19

    42089201th rev.4 19 / oki data confidential 2.1.6 print control print data is transmitted as parallel data (head1~head9) from lsi to print head. Lsi generates print timing and drive time. Head drive timing chart dt1 dt2 head drive current print data mpu lsi driver head1-n~ head9-n print data print h...

  • Page 20

    42089201th rev.4 20 / oki data confidential (d) simultaneous compensation of the number of impact pins the mpu is provided with the compensation table for each pin to make necessary compensation. Print compensation control the print compensation can be made as shown below: (a) voltage compensation (...

  • Page 21

    42089201th rev.4 21 / oki data confidential 2.1.7 sp/lf motor control (1) space motor control the sp motor driver (ecn30105) drives the three-phase brushless motor based on the phase signal (spu, spv and spw) and the speed instruction data from the lsi. The mpu can identify the current speed of the ...

  • Page 22

    42089201th rev.4 22 / oki data confidential (2) encoder disk in the operation of the spacing motor, the phase-a and phase-b signals are generated when the encoder disk interrupts the photo sensor. The lsi divides these edge pulse signals in accordance with the print pitch, and sends the ipt signal t...

  • Page 23

    42089201th rev.4 23 / oki data confidential 2.1.8 operation panel the clock synchronization opclk of lsi is used to input the switch data and output the led data through the operation panel control lsi (ic1: bu6152s). Lsi optxd opclk opclr-n oprxd 77 78 80 optd opck npa2 oprd command and data latch ...

  • Page 24

    42089201th rev.4 24 / oki data confidential note: from the illustration above, you can see that the command and the command response are output at the same time. This is because the bit 0 to bit 3 of oprxd are fixed so that the response can be returned before decoding the command. Optxd opclk oprxd ...

  • Page 25

    42089201th rev.4 25 / oki data confidential 2.1.9 alarm circuit (1) head drive time alarm circuit this circuit monitors the drive time using the hdalm signal interlocked with the overdrive signal of each drive circuit. If the drive time of any drive circuit exceeds the specified time, the drive faul...

  • Page 26

    42089201th rev.4 26 / oki data confidential mode speed pass direction 1 100% 1 bi 2 85% 1 bi 3 70% 1 bi 4 55% 1 bi 5 40% 1 bi 6 30% 1 bi 1.5 sec stop (7) stop • when the temperature is between α° c and 119 ° c, the mode switches sequentially to higher level. When the temperature falls below ß ° c, t...

  • Page 27

    42089201th rev.4 27 / oki data confidential 2.1.10 power supply circuit this power supply circuit supplies the +5vdc, +8vdc, +40vdc, 10vac. Sw fuse noise filter circuit trans- former control board rectifier rectifier regulation circuit +40v +8v +5v ac10v the uses of output voltages and signals are d...

  • Page 28

    42089201th rev.4 28 / oki data confidential 2.2 mechanical operation 2.2.1 printhead mechanism and operation (see figure 2-2.) the printhead is a spring charged 9-pin driving head using a permanent magnet. It is attached to the carriage, which moves in parallel with the platen. Electrically, this un...

  • Page 29

    42089201th rev.4 29 / oki data confidential (2) operation of printhead (see figure 2-3.) (a) when the printhead is idle, the armature is attracted by a permanent magnet and the spring fixing the armature is compressed. The print wires fixed to each armature are thus concealed under the wire guide. (...

  • Page 30

    42089201th rev.4 30 / oki data confidential (2) when not printing (1) when printing paper print wire platen paper print wire armature assembly thermistor wire guide yoke magnet assembly spacer paper figure 2-3 printhead.

  • Page 31

    42089201th rev.4 31 / oki data confidential 2.2.2 spacing operation (see figure 2-4.) the spacing mechanism consists of a carriage shaft mounted in parallel with the platen, and a carriage frame that moves along the shaft. It is driven by a dc motor mounted on the bottom of the carriage frame. Items...

  • Page 32

    42089201th rev.4 32 / oki data confidential 2.2.3 head gap adjusting (see figure 2-5.) the head gap adjusting lever moves back and forth to tilt the carriage frame, altering the gap between the printhead and the platen. The adjusting screw, which is connected to the adjusting gear rotates when the a...

  • Page 33

    42089201th rev.4 33 / oki data confidential figure 2-5 platen range adjusting lever idler gear adjusting gear carriage shaft printhead adjusting screw adjusting cam adjusting screw c.C.W. Printhead narrows platen guide rail widens c.W. 1 2 3 4 range from 5 to 1 range from 1 to 5 5.

  • Page 34

    42089201th rev.4 34 / oki data confidential 2.2.4 ribbon drive (see figure 2-6.) the ribbon driver mechanism moves the ribbon in synchronization with the space motor operation. The ribbon drive mechanism consist of the following items: (a) ribbon drive gear assembly (b) ribbon gear (space motor) (c)...

  • Page 35

    42089201th rev.4 35 / oki data confidential 2.2.5 paper feed operation feeding of the paper is performed by turning the platen and the pin tractor, which is driven by the lf pulse motor. Item of the paper feed mechanism are as follows: (a) pulse motor with gears (b) decelerating gear (c) platen (d) ...

  • Page 36

    42089201th rev.4 36 / oki data confidential (1) cut sheet and continuous sheet switching mechanism (see figure 2-8.) three different paper paths can be selected and set by the change lever. (a) top (for cut sheet) when the cut sheet is used in the manual mode or fed by the csf (option), set the chan...

  • Page 37

    42089201th rev.4 37 / oki data confidential control power supply assy release shaft change arm change lever change gear shaft figure 2-8 top platen rear bottom change lever tractor gear change gear reset spring platen gear (r) idle gear (bottom tractor unit) rear switch switch lever bottom switch.

  • Page 38

    42089201th rev.4 38 / oki data confidential (2) cut-sheet feeder operation (see figure 2-9.) the pulse motor used for the paper feed mechanism is mounted on the left of the frame, and the rotation of the motor is transmitted through decelerating gears (lf idle gear, platen gear) to the platen. When ...

  • Page 39

    42089201th rev.4 39 / oki data confidential (3) continuous paper feed operation (rear) (see figure 2-10.) the force transmitted to the platen, rotates the tractor gear through platen gear, the idler gear and the change gear. The rotation of the tractor gear makes the pin tractor belt rotate through ...

  • Page 40

    42089201th rev.4 40 / oki data confidential figure 2-11 drive gear pull tractor idle gear push tractor platen gear platen (4) push and pull tractor mechanism (option) (see figure 2-11). This mechanism consist of an optional pull tractor and a standard push tractor mechanism. This mechanism can perfo...

  • Page 41

    42089201th rev.4 41 / oki data confidential (5) pull tractor mechanism (option) (see figure 2-12.) bottom feed of continuous sheets is possible only when an optional pull tractor unit is installed. The rotation of the platen is transmitted to the idle gear of the pull tractor unit through the platen...

  • Page 42

    42089201th rev.4 42 / oki data confidential (6) bottom push feed operation (option) (see figure 2-13.) the bottom push feed of the continuous sheet is possible only when the bottom tractor feed unit is installed. When the platen rotates, the rotational force of the platen is transmitted through the ...

  • Page 43

    42089201th rev.4 43 / oki data confidential (7) paper clamp mechanism (see figure 2-14.) when setting the change lever to the bottom , top or rear position, the operation of the front release gear arm changes according to the position of the release cam. And at the same time, the position of the cam...

  • Page 44

    42089201th rev.4 44 / oki data confidential figure 2-14 change lever release cam platen front release gear arm top bottom rear.

  • Page 45

    42089201th rev.4 45 / oki data confidential 2.2.6 paper detection mechanism (see figure 2-15.) (1) cut sheet detection when the cut sheet is inserted, the point a is pushed backward and the paper near end lever b rotates counter clockwise (ccw). At this time, the rear sensor lever rotates counterclo...

  • Page 46

    42089201th rev.4 46 / oki data confidential (4) top line print mechanism (see figure 2-16.) the front edge of the sheet is protected by the ribbon protector so that it can stop at a position just near to the print head (0 tear off position) to start printing at the front end of the sheet, without ca...

  • Page 47

    42089201th rev.4 47 / oki data confidential time out time selected on the menu sheet setting pe detection timer lf action rear bottom top bottom rear top sw1 sw2 figure 2-17 2.2.7 automatic sheet feed this function is used to feed in the sheet automatically up to the print start position when the cu...

  • Page 48

    42089201th rev.4 48 / oki data confidential (2) when using the continouos paper 1) set the change lever either to the rear side or the bottom side position. (see figure 2-17.) 2) set a sheet of paper either to the push tractor or the bottom tractor. 3) press the “ff/load” switch. 4) the lf motor sta...

  • Page 49

    42089201th rev.4 49 / oki data confidential 2.2.8 paper park function (continuous paper) continuous sheets which have been inserted can be reversed automatically by using the “park” button on the operation panel. 1) press the “park” button on the operation panel. 2) reverse lf is started and paper i...

  • Page 50: Assembly/disassembly

    42089201th rev.4 50 / oki data confidential ac input plug ac receptacle ac cable interface cable 3. Assembly/disassembly this section explains the procedures for removing and installing various assemblies and units in the field. Description is mainly limited to the removal procedure; installation sh...

  • Page 51

    42089201th rev.4 51 / oki data confidential 3.2 service tools table 3.1 lists the tools necessary for replacing printed circuit boards and parts of units in the field. Table 3.1 service tools 1 no. 1-100 phillips 1 screws screwdriver 2.6 mm 2 no. 2-200 phillips 1 screws screwdriver 3-5 mm 3 no. 3-10...

  • Page 52

    42089201th rev.4 52 / oki data confidential a b c d control/power supply board upper cover assy transformer assy operation panel board printhead printer unit driver board 3.3 disassembly/reassembly procedure this section explains the assembly replacement procedures according to the following disas- ...

  • Page 53

    42089201th rev.4 53 / oki data confidential [how to change parts] this section explains how to change parts and assemblies appearing in the disassembly diagram below. Printer unit 3.3.1 printhead 3.3.2 ribbon protector 3.3.3 pull-up roller assy 3.3.4 upper cover, access cover and sheet guide 3.3.5 g...

  • Page 54

    42089201th rev.4 54 / oki data confidential 3.3.1 printhead (1) open the access over. (2) pull up and rotate the head clamp 1 to unclamp the printhead 2 as shown fig. 3.3.1. (3) disconnect the printhead 2 from pc connector 3 . (4) to install, follow the removal steps in the reverse order. Notes on i...

  • Page 55

    42089201th rev.4 55 / oki data confidential 3.3.2 ribbon protector (1) remove the printhead (see 3.3.1). (2) open the pull-up roller cover 1 . (3) raise and remove the ribbon protector 2 . (4) to install, follow the removal steps in the reverse order. 1 2.

  • Page 56

    42089201th rev.4 56 / oki data confidential 3.3.3 pull-up roller assy (1) open the access cover 1 . (2) lift up the sheet guide assy 4 to remove. (3) tilting the pull-up roller assy 2 toward the front, remove from the shaft of platen assy 3 . (4) to install, follow the removal steps in the reverse o...

  • Page 57

    42089201th rev.4 57 / oki data confidential 1 3 4 5 2 a 3.3.4 upper cover assy, access cover assy and sheet guide assy (1) pull off the platen knob 1 . (2) turn the change lever 2 toward the bottom position. (3) insert a flat-blade screwdriver into grooves (5 places) (4 places for narrow type) of fr...

  • Page 58

    42089201th rev.4 58 / oki data confidential 3.3.5 gear case assy (1) remove the printhead (see 3.31). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) move the carriage assy to right hand side, remove two screws 1 , then the space motor 2 . (4) disconnect a carriage cable. (5) disengage claws (...

  • Page 59

    42089201th rev.4 59 / oki data confidential 3.3.6 pc connector (1) remove the printhead (see 3.3.1). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the gear case assy (see 3.3.5). (4) remove the pc connector 1 from the space motor assy 2 . (5) to install, follow the removal steps in th...

  • Page 60

    42089201th rev.4 60 / oki data confidential d 3.3.7 space motor, guide roller assy (1) remove the printhead (see 3.3.1). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the gear case assy (see 3.3.5). (4) remove the pc connector (see 3.3.6). (5) remove screw 2 , then the guide roller as...

  • Page 61

    42089201th rev.4 61 / oki data confidential 3.3.8 space rack (1) remove the printhead (see 3.3.1). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the gear case assy (see 3.3.5). (4) remove the space motor (see 3.3.7). (5) remove the spring 1 . (6) disengage the claw on left side of spa...

  • Page 62

    42089201th rev.4 62 / oki data confidential a b d c e 3.3.9 carriage cable (1) remove the printhead (see 3.3.1). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the gear case assy (see 3.3.5). (4) remove the space motor (see 3.3.7). (5) remove the space rack (3.3.8). (6) remove two scre...

  • Page 63

    42089201th rev.4 63 / oki data confidential 3.3.10 backup roller holder assy (1) remove the printhead (see 3.3.1), (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the gear case assy (see 3.3.5). (4) remove the space motor (see 3.3.7). (5) remove the backup roller spring 2 . Disengage cl...

  • Page 64

    42089201th rev.4 64 / oki data confidential 3.3.11 platen assy (1) remove the printhead (see 3.3.1). (2) remove the ribbon protector (see 3.3.2). (3) remove the pull-up roller assy (see 3.3.3). (4) remove the upper cover (see 3.3.1 (1) – (5)). (5) turn the change lever 1 to the bottom position. (6) ...

  • Page 65

    42089201th rev.4 65 / oki data confidential 3.3.12.1 driver board (dve/dvf) (at usb ver.) (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove two screws 1 and remove two screws 5 , and release the driver board 2 and plate i/f 6 by lifting clamp 4 . (3) disconnect all cables from driver boar...

  • Page 66

    42089201th rev.4 66 / oki data confidential 3.3.12.2 driver board (sdf) (at non usb ver.) (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove two screws 1 , and release the driver board 2 and pcb sheet 5 by lifting clamp 4 . (3) disconnect all cables from driver board 2 . (4) to install, fo...

  • Page 67

    42089201th rev.4 67 / oki data confidential 3.3.13 lf motor (1) remove the printhead (see 3.3.1). (2) remove the ribbon protector (see 3.3.2). (3) remove the pull-up roller assy (see 3.3.3). (4) remove the upper cover (see 3.3.4 (1) – (5)). (5) remove the platen assy (see 3.3.11). (6) remove the dri...

  • Page 68

    42089201th rev.4 68 / oki data confidential a 3.3.14 operation panel pcb (leop) (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) disconnect the cable 1 from connector 3 of driver board 2 . (3) disengage claws on both sides from the frame, and remove the operation panel 4 . (4) open claws (8 pla...

  • Page 69

    42089201th rev.4 69 / oki data confidential a 3.3.15 control/power supply board (aoe/aou/aoo) 3 6 5 7 8 4 8 1 2 (at usb ver.) there is a risk of electric shock during replacement of the power supply. Use insulating gloves or avoid direct contact with any conducting part of the power supply, and caut...

  • Page 70

    42089201th rev.4 70 / oki data confidential 3.3.16 transformer assy (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove ac inlet 1 and ac switch 2 from the frame guide. (3) disconnect the cable 3 from the connector 4 on the control/power supply board 5 . (4) remove a screw 6 and disconnect ...

  • Page 71

    42089201th rev.4 71 / oki data confidential 3.3.17 change lever and gears (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove the reset spring 1 , then remove the idle gear 2 , the tractor gear 4 and the change gear 5 . (3) push back the protrusion of the change gear shaft 6 with a flatblad...

  • Page 72

    42089201th rev.4 72 / oki data confidential 3.3.18 carriage shaft (1) remove the printhead (see 3.3.1). (2) remove the upper cover (see 3.3.4 (1) – (5)). (3) remove the driver board (see 3.3.12). Remove the fg plate (l) 2 . (4) slide the carriage shaft 1 to the left side (in the direction of the arr...

  • Page 73

    42089201th rev.4 73 / oki data confidential 3.3.19 paper pan (1) remove the printhead (see 3.3.1). (2) remove the ribbon protector (see 3.3.2). (3) remove the pull-up roller assy (see 3.3.2). (4) remove the upper cover assy (see 3.3.4 (1) – (5)). (5) remove the platen assy (see 3.3.11). (6) release ...

  • Page 74

    42089201th rev.4 74 / oki data confidential 3.3.20 rear tractor assy (1) remove the printhead (see 3.3.1). (2) remove the ribbon protector (see 3.3.2). (3) remove the pull-up roller assy (see 3.3.3) (4) remove the upper cover (see 3.3.4 (1) – (5)). (5) remove the reset spring (see 3.3.17 (3)) (6) re...

  • Page 75

    42089201th rev.4 75 / oki data confidential 7 6 2 4 1 4 2 5 3 3 1 3 2 a b 3.3.21 rear pressure assy (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove the change lever and gears (see 3.3.17). (3) remove the paper pan (see 3.3.19). (4) remove the rear pressure roller 1 . (5) rotate the rele...

  • Page 76

    42089201th rev.4 76 / oki data confidential 3.3.22 switch lever (1) remove the upper cover (see 3.3.4 (1) – (5)). (2) remove the change lever and gears (see 3.3.17). (3) remove the paper pan (see 3.3.19). (4) remove the rear pressure assy (see 3.3.21). (5) pull the switch lever toward you and remove...

  • Page 77: Adjustment

    42089201th rev.4 77 / oki data confidential 4. Adjustment (1) be sure to carry out this adjustment with the printer mechanism mounted on the lower cover. (2) be sure to carry out this adjustment operation on a level and highly rigid work table (flatness: less than 0.039 inch or 1 mm) so as to minimi...

  • Page 78

    42089201th rev.4 78 / oki data confidential item no. Specification drawing adjustment method gap between the plat- en and the print head 1) parallelism ad- justment 4–1–1 variation of value at the left, the center and the right shall be less than 0.02 mm it shall be measured at 3 points: the left en...

  • Page 79

    42089201th rev.4 79 / oki data confidential item no. Specification drawing adjustment method note 1) the head gap shall be measured with the change lever set to rear position. Note 2) the head gap shall be measured positioning the platen gear (r) craw on the top. Note 3) move the adjust screw in clo...

  • Page 80

    42089201th rev.4 80 / oki data confidential item no. Specification drawing adjustment method gap between the con- tact and the monitor 0.3mm or more touching adjust lever contact motor pcb confirm followings. Make sure that the gap between the con- tact and the motor pcb is 0.3 mm or more. At the ti...

  • Page 81

    42089201th rev.4 81 / oki data confidential item no. Specification drawing adjustment method 4–2 1 ± 0.5 confirm followings. (1) when the change lever is set at friction position, the gap between the platen and the paper pan at the rear side shall be 1 ± 0.5mm. (2) when the change lever is set at re...

  • Page 82

    42089201th rev.4 82 / oki data confidential item no. Specification drawing adjustment method rotation of the push tractor 4–4–1 to confirm: the tractor gear shall rotate smoothly when the change lever is set at friction posi- tion. Backlash between gears 4–4–2 approx. 0.05 to 0.11 mm to confirm: the...

  • Page 83

    42089201th rev.4 83 / oki data confidential item no. Specification drawing adjustment method ribbon feed 4–5–1 to confirm: ribbon shall be fed smoothly when the carriage is moved from side to side. Running load to spac- ing mechanism 4–5–2 to confirm: make sure that the power is turned off at the ti...

  • Page 84

    42089201th rev.4 84 / oki data confidential item no. Specification drawing adjustment method 4–6 to confirm: the idle gear of the lf motor and the platen gear (l) and the bias gear of the platen shall be in mesh in such way that the platen gear (l) and the bias gear rotate against each other to pinc...

  • Page 85: Cleaning and Lubrication

    42089201th rev.4 85 / oki data confidential 5. Cleaning and lubrication 5.1 cleaning [cautions] 1. Be sure to turn off the ac power switch before cleaning. Remove the ac power cord from the printer. 2. Avoid dust inside the printer mechanism when cleaning. 3. If a lubricated part has been cleaned, b...

  • Page 86

    42089201th rev.4 86 / oki data confidential 5.2 lubrication this printer is designed to be maintenance free and requires no lubrication during normal operation. However it is necessary to apply lubricant in case the printer is disassembled, reassembled, cleaned or parts have been changed. (1) cleani...

  • Page 87

    42089201th rev.4 87 / oki data confidential (5) lubrication point 1. Ribbon feed gear assy. 2. Space rack idle gear shaft (upper and lower) pm-b (0.006 ± 0.002g) space rack rack upper side approx. 30 (greasing range) planetary gear shaft (upper and lower) em-30l-a drive gear shaft (upper and lower) ...

  • Page 88

    42089201th rev.4 88 / oki data confidential 3. Platen assy. Bias gear contact face of platen shaft and platen fg spring em-30-l-b grease the contact face of platen gear (l) and bias gear pm-b platen gear (l).

  • Page 89

    42089201th rev.4 89 / oki data confidential 4. Tractor driving mechanism 5. Tractor drive shaft change lever change arm reset spring sliding surface of reset spring and gear em-30l-a sliding surface of change lever and gear em-30l-a 12345 12345 12345 12345 a-a arrow view sliding surface of change ar...

  • Page 90

    42089201th rev.4 90 / oki data confidential 6. Pressure roller sliding portion of release shaft and change arm em-30l-a change arm release shaft front pressure roller support spring controller holder sliding portion of rear roller holder and release shaft cam surface (release shaft plane portion) em...

  • Page 91

    42089201th rev.4 91 / oki data confidential 7. Pull up roller assy. Pull-up roller frame pull-up roller shaft all bearing portions of pull-up roller shaft and pull-up roller frame em-30l-b gear and post em-30l-a.

  • Page 92

    42089201th rev.4 92 / oki data confidential models destination apoint ml3320 oel ml320turbo other ml3321 oel ml321turbo other 8. Main chassis assy. Grease portion grease portion at rib (n: 9 portions w: 13 portions) em-30l-a grease portion (n: 3 portions, w: 5 portions) rear side em-30l-a n w.

  • Page 93

    42089201th rev.4 93 / oki data confidential 9. Carriage assy. Nk2-10-sus bearing portion of guide roller em-30l-b.

  • Page 94: Troubleshooting and Repair

    42089201th rev.4 94 / oki data confidential 6. Troubleshooting and repair 6.1 items to check before repair (1) check the inspection items specified in the instruction manual. (2) find out as many details of the trouble as possible from the customer. (3) inspect in the conditions as close as possible...

  • Page 95

    42089201th rev.4 95 / oki data confidential note: blink1 : 400ms on, 400ms off blink2 : 200ms on, 200ms off — : led is kept in current condition (no change) (2) fault alram display when the printer detects any of the various alarm states, the information is displayed as shown below on the operation ...

  • Page 96

    42089201th rev.4 96 / oki data confidential alarm category alarm led display alarm 10 12 15 17 20 prop hsd utl nlq remarks troubleshooting main control alarm firmware detection alarm serial interface alarm mpu internal ram alarm program rom alarm ram on control board alarm eeprom alarm wdt (watch do...

  • Page 97

    42089201th rev.4 97 / oki data confidential alarm category alarm led display alarm 10 12 15 17 20 prop hsd utl nlq remarks troubleshooting spacing alarm spacing alarm print head homing alarm print head a/d alarm space ipt is not occurred within in specified timing. : led blink (200ms on, 200ms off) ...

  • Page 98

    42089201th rev.4 98 / oki data confidential lf motor control/power supply board ac connector transformer driver board operation panel board centro-connector switch printhead space motor (at usb ver.).

  • Page 99

    42089201th rev.4 99 / oki data confidential 6.4 connection circuit check for printhead and sp/lf motor (1) printhead signal connector pin number cn1 1 #1 2 #2 3 #4 4 #6 5 #8 6 7 8 9 10 11 #9 12 #7 13 #5 14 #3 15 thermistor head1 head2 head4 head6 head8 el htemp +40v +40v +40v head9 head7 head5 head3.

  • Page 100

    42089201th rev.4 100 / oki data confidential (2) line feed motor resistance of each coil should be about 10.4 Ω . Signal connector pin number a1 a2 b1 b2 cn4 1 2 3 4 lf motor (3) space motor resistance of each coil should be about 18.4 Ω . Signal connector pin number sp-u sp-v sp-w spa spb +5v el cn...

  • Page 101

    42089201th rev.4 101 / oki data confidential 6.5 troubleshooting flow chart 1 power is not supplied. Is the ac cable connected correctly? Yes no connect the ac cable correctly. Is fuse f1 on the transformer assy/or f1 on the control/power supply board blown? No yes replace fuse (with same type and r...

  • Page 102

    42089201th rev.4 102 / oki data confidential no yes replace driver board. Replace transformer assy. Remedied? No yes end replace control/power supply board. Pin no. 20 19 18 17 16 15 14 13 10 9 8 7 6 5 signal +8v ep +40v ac el +5v (f.G) 10v (0v) driver board cn2 20 1 ••••••••••••••••••••••.

  • Page 103

    42089201th rev.4 103 / oki data confidential 2 no spacing operation (the alarm led blinks) is carriage assembly binding or jammed? No yes check around space motor to repair the mechanism of space rack, back up roller, ribbon feed mechanism, and carriage frame etc. Replace space motor assy. Remedied?...

  • Page 104

    42089201th rev.4 104 / oki data confidential 3 homing does not end normally yes no check around space motor to repair the mechanism. (space rack, ribbon feed assembly back up roller, carriage frame, support protector and ribbon protector.) remedied? No yes end replace space motor assy. Replace space...

  • Page 105

    42089201th rev.4 105 / oki data confidential 4 paper jam while paper insertion jam 1 check around pressure roller mechanism. • front pressure springs are narrow: 3 pcs; wide: 5 pcs) mounted properly or not. • tension of all of front pressure rollers is properly. • make sure of the fitting position o...

  • Page 106

    42089201th rev.4 106 / oki data confidential 5 smearing/missing dots does alarm led blink and display alarm? No yes see tables 6.2 and 6.3 for troubleshooting information. Replace printhead. Remedied? No yes end replace driver board. Remedied? No yes end replace carriage cable or space motor assy..

  • Page 107

    42089201th rev.4 107 / oki data confidential 6 faint or dark print is the print head gap set properly? Yes no adjust the printhead gap (see section 5). Remedied? No yes end replace printhead. Remedied? No yes end replace driver board. Remedied? No yes end replace ribbon feed mechanism..

  • Page 108

    42089201th rev.4 108 / oki data confidential 7 ribbon feed trouble remove the ribbon cartridge. Move carriage to left and right. Does the ribbon drive shaft rotate? No yes change ribbon cartridge. Remove ribbon feed mechanism. Move carriage to left and right. Does the ribbon drive shaft rotate? No y...

  • Page 109

    42089201th rev.4 109 / oki data confidential 8 line feed trouble turn the power off, and rotate the platen manually. Does the platen rotate smoothly? Yes no is the platen gear (l) broken? No yes replace platen assembly. Is the lf motor idle gear broken? No yes replace the lf motor assembly or lf idl...

  • Page 110

    42089201th rev.4 110 / oki data confidential 9 malfunction of switch on operation panel is the cn1 of operation panel connected to the cn3 on the driver board? Yes no connect the cable properly. Replace operation panel board. Remedied? No yes end replace driver board..

  • Page 111

    42089201th rev.4 111 / oki data confidential 0 data receiving failure is the sel led blinking? No yes printer went into the print suppress mode. Wait until printer to receives dc1 code, or change the menu item “print suppress-ineffective” when the function is not required. Is the i/f rs232c? No yes ...

  • Page 112

    42089201th rev.4 112 / oki data confidential 10-2 (rs232c i/f) printer i/f pin assignment. Is the correct cable used? Txd 2 pin, rxd 3 pin, yes no ssd 11 pin, dtr 20 pin, change i/f cable. Dsr 6 pin. Is alarm led blinking? No yes see tables 6.2 and 6.3 for the troubleshooting. Make sure of the param...

  • Page 113: Appendix A  Pcb Layout

    42089201th rev.4 113 / oki data confidential appendix a pcb layout pcb list (1) circuit board aoe/aou/aoo (control/power supply) (2) circuit board dve/dvf or sdf (driver) (3) circuit board leop (operation panel) (1) control/power supply board (aoe/aou/aoo) sp2 sp1 q1 q2 sp3 sp4 (aoo) (aou) sp2 sp1 q...

  • Page 114

    42089201th rev.4 114 / oki data confidential (2) driver board (dve/dvf or sdf) (3) operation panel board (leop) (dve/dvf) driver board (sdf).

  • Page 115: General

    42089201th rev.4 115 / oki data confidential appendix b rs-232c serial interface board (option) 1. General this section describes the operation of the rs-232c serial interface board installed in the printer as an option using a start-stop synchronization and serial communications circuit. This seria...

  • Page 116

    42089201th rev.4 116 / oki data confidential ocs p1 p2 p0 p3 td rd if wr ls245 2764 rom 8 kb rd td ram 8 kb driver +5 vd 10 vac +5 v +9 v -9 v +5v 0v ± 9 v power supply circuit serial data control line bus line control line adr latch receiver db0 to db9 adr/data bus adr bus 80c51 rst cn1 figure b-2-...

  • Page 117

    42089201th rev.4 117 / oki data confidential 2.2.1 operation at power on after power is turned on, an rst out signal is sent from the printer control board to reset the printer. When the reset is canceled, the 80c51 cpu performs initialization. Initialization consists of setting the 80c51 timer, and...

  • Page 118

    42089201th rev.4 118 / oki data confidential ready/busy received one character? Yes is dsr valid? No buffer overflow? Error? Parity error no error store the received character in buffer. Is the printer in deselect state or is the paper low? No no yes yes no dsr high? Yes store 40 h in buffer. Yes ye...

  • Page 119

    42089201th rev.4 119 / oki data confidential figure b-2-3 x-on, x-off received one character? Yes is dsr valid? No buffer overflow? Error? Parity error no error store the received character in buffer. Is the printer in deselect state or is the paper low? No no yes yes no dsr high? Yes store 40 h in ...

  • Page 120: Troubleshooting Flowchart

    42089201th rev.4 120 / oki data confidential 3. Troubleshooting flowchart 3.1 before repairing a fault before servicing the printer, ask the customer in what situation the trouble occurred and record the response. Before starting troubleshooting, operate the printer in the same situation as that at ...

  • Page 121

    42089201th rev.4 121 / oki data confidential figure b-3-4 a yes are ale, psen, rd, wr, signals as specified in figure b-3-3? No replace the q3. Yes are (t1) select and (into) busy signals low level? No check q12 on the driver board. Yes are +9v and -9v input to q1? No replace defective component in ...

  • Page 122

    42089201th rev.4 122 / oki data confidential 2 in receiving by serial interface, printing data is omitted or printing operation is not performed. Are rxd and ssd of q3 as specified in figure b-3-4? No replace the q2. Yes are, wr, and bus signals of q3 pin 3 as specified in figure b-3-5? No replace t...

  • Page 123

    42089201th rev.4 123 / 123 oki data confidential 3.3 local test 3.3.1 circuit test mode 3.3.1.1setting (1) diagnostic test (set by menu) (2) test connector connect the test connector shown in figure b-3-6 to the interface connector figure b-3-6 test connector connection diagram 3.3.1.2function after...