Brother CB200 Service Manual Download Page 1

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COPYBOARD

SERVICE MANUAL

MODEL: CP1800/CP2000/CB200

Summary of Contents for CB200

Page 1: ...COPYBOARD SERVICE MANUAL MODEL CP1800 CP2000 CB200 ...

Page 2: ...n may be reproduced in any form or by any means without permission in writing from the publisher Specifications are subject to change without notice All products and company names mentioned in this manual are trademarks or registered trademarks of their respective holders ...

Page 3: ...rm appropriate maintenance so that the machine is always in best condition for the customer the service personnel must adequately understand and apply this manual This manual is made up of five chapters and appendix CHAPTER I GENERAL DESCRIPTION CHAPTER II THEORY OF OPERATION CHAPTER III DISASSEMBLY REASSEMBLY AND LUBRICATION CHAPTER IV MAINTENANCE MODE CHAPTER V ERROR INDICATION AND TROUBLESHOOTI...

Page 4: ...CHAPTER I GENERAL DESCRIPTION ...

Page 5: ...CHAPTER I GENERAL DESCRIPTION CONTENTS 1 1 MACHINE OUTLINE I 1 1 1 1 External Appearance and Weight I 1 1 1 2 Components I 1 1 2 SPECIFICATIONS I 2 ...

Page 6: ...he figure below shows the machine appearance and approximate dimensions CP2000 CB200 CP1800 Weight Machine proper 14 5 kg 32 0 lbs 11 8 kg 26 0 lbs In package 23 0 kg 50 7 lbs 19 5 kg 43 0 lbs 1 1 2 Components The machine consists of the following major components ...

Page 7: ...s Print Density 8 dots mm USE Easel Stand Portrait Same as left Same as left Wall Mount Portrait landscape Partition Hanger Portrait landscape POWER Power Source AC adapter supplied 100 to 240 VAC 50 60 Hz Power Consumption Standby 5W Operating 30W SIZE Size H x W x D In package inch 54 5 x 33 6 x 11 0 49 9 x 38 3 x 10 0 mm 1383 x 852 x 280 1267 x 973 x 255 Use with easel stand inch 75 9 x 28 5 x ...

Page 8: ...CHAPTER II THEORY OF OPERATION ...

Page 9: ...CHAPTER II THEORY OF OPERATION CONTENTS 2 1 OVERVIEW II 1 2 2 MECHANISMS II 2 2 2 1 Scanner mechanism II 2 2 2 2 Thermal printing mechanism II 4 2 2 3 Sensors II 5 2 3 CONTROL ELECTRONICS II 6 ...

Page 10: ...II 1 2 1 OVERVIEW ...

Page 11: ...and control signals sent from the main PCB of the printer to the WB motor and relays the scanned image with control signals from the CIS units to the main PCB If you press the FEED key the WB motor rotates to drive the screen feed pipe scrolling up the copyboard screen The scanner uses three CIS units each of which consists of an LED array illuminating the copyboard screen via a glass prism bar si...

Page 12: ...II 3 ...

Page 13: ...r guide bar and ACS plate to the recording head which prints onto the paper pressed by the platen according to image signals issued from the main PCB The ACS eliminates curl peculiar to rolled paper by curving the paper towards the opposite side of the curl with the ACS plate If the printer motor stepping motor is driven its rotational force is transmitted via the gear train in the drive unit to t...

Page 14: ...ecording paper is present or the paper compartment cover is closed The thermistor in the recording head allows the controller to monitor the temperature of the head According to the change of the thermistor s internal resistance monitored the controller manages the duty cycle of the head drive current The left hand CIS works as a home position detector of the copyboard screen also If it detects ei...

Page 15: ...II 6 2 3 CONTROL ELECTRONICS ...

Page 16: ...CHAPTER III DISASSEMBLY REASSEMBLY AND LUBRICATION ...

Page 17: ...g the components from the printer base unit III 12 Removing the printer support III 12 Removing the sub cover and control panel PCB III 13 Removing the main PCB and its bracket III 14 Removing the drive unit and hinge plate L III 17 Removing the head protector recording head ASSY recorder frame and PE cover sensor PCB III 19 Removing the films III 21 3 1 2 Disassembly of Copyboard III 22 1 Removin...

Page 18: ... pipe and its holders III 30 Removing the WB motor III 33 4 Replacing the white sheet copyboard screen and the sheet backup board III 35 3 2 LUBRICATION III 40 1 Joints between the platen shaft and its bushings III 40 2 WB motor related gears on the lower pipe holder L III 40 3 Lower pipe holder L III 41 4 Lower pipe holder R III 41 5 Upper pipe shaft III 42 ...

Page 19: ...f tapping screws correctly if removed When removing self tapping screws from aluminum frames aluminum material may stick to the threads of those screws requiring higher torque for retightening If it happens do not tighten them forcedly but use new screws and observe the specified torque values 7 Tighten screws to the torque values listed on the next page 8 When connecting or disconnecting cable co...

Page 20: ...6 1 0 69 0 1 COPYBOARD Upper cover Shoulder screw 3 0 78 0 1 Corner covers upper Screw flat S M3x10 4 0 78 0 1 CIS protector upper Taptite cup S M3x10 2 0 78 0 1 Upper support frame Taptite cup S M3x10 2 0 78 0 1 CIS frame Taptite cup S M3x10 4 0 78 0 1 CIS units Taptite bind B M3x8 6 0 39 0 1 Lower cover Shoulder screw 3 0 78 0 1 Corner covers lower Screw flat S M3x10 4 0 78 0 1 CIS protector low...

Page 21: ...interface cable from the printer and then remove the four decorative screws to separate the printer from the copyboard n n How to Access the Object Component On the next page is a disassembly order flow which helps you access the object components To remove the main PCB for example first find it on the flow You need to remove the printer printer base unit printer support and sub cover so as to acc...

Page 22: ...III 4 n n Disassembly Order Flow ...

Page 23: ...y pulling up its latch 2 Pull the paper guide bar in the direction of arrow and unhook the hinge spring from the shoulder screw arrow 3 Remove the retaining ring E5 arrow ƒ from the shaft of the platen frame R 4 Shift the printer base unit in the direction of arrows and to release it from the shafts of the platen frame R and L respectively ...

Page 24: ... cover 1 Hold the printer base unit at a right angle from the paper compartment cover and fit it over the shafts of the platen frames L and R When doing this take care not to bring the paper guide bar inside the tabs of the ACS plate or not to bring the films inside the paper compartment cover ...

Page 25: ...III 7 2 Set the retaining ring E5 onto the shaft of the platen frame R 3 Hook the hinge spring onto the shoulder screw ...

Page 26: ...he paper guide bar then remove the paper guide bar from the paper stoppers R and L 3 Remove the platen stopper one pan B taptite screw M4x20 4 At the right end of the platen shaft remove the platen gear by pulling its pawl outwards and then remove the bushing R At the left end remove the pawled bushing L by pulling its pawls outwards 5 Move the platen to the right arrow to take out the left end fr...

Page 27: ...d then unhook the lock lever spring from the platen frame R 7 Move the lock lever to the left arrow ƒ At the left end of the lock shaft remove the lock lever by unlatching the pawl arrow and then unhook the lock lever spring from the platen frame L Take out the lock shaft arrow n n Reassembling notes When inserting the lock shaft through the paper compartment latch face its short end to the right ...

Page 28: ...move two screws from the platen frame R and take out the platen frame R together with the hinge spring paper stopper R and its spring 9 Remove two screws from the platen frame L and take out the platen frame L together with the paper stopper L and its spring ...

Page 29: ...hole of the platen frame arrow and then fit the paper stopper to the tab of the platen frame arrow ƒ For the platen frame R set the hinge spring on it as shown on the previous page When reinstalling the lock levers first work at the platen frame L As shown below with dotted lines hold the lock lever and then hook the lock lever spring onto the platen frame L Next work the same way at the platen fr...

Page 30: ...nts from the printer base unit Removing the printer support 1 Take off the printer support from the printer base unit by removing the four screws NOTE After removing the printer support take care not to bend the grounding spring R ...

Page 31: ... the panel sheet will become unusable and a new one will have to be put back in 5 Remove two screws from the panel cover Push up the front face of the panel cover to release its latches and pull it towards you 6 Remove the two screws from the control panel PCB n n Reassembling notes When securing the panel cover with screws press it in the direction of arrows A and B as shown below When securing t...

Page 32: ...CB and its bracket 7 Disconnect the following harnesses from the main PCB while holding down the main PCB Recording head signal harness Sensor harness Panel harness if connected Printer motor harness Recording head power harness ...

Page 33: ...III 15 8 Remove the PC interface cover if mounted 9 Remove two screws and take out the main PCB ...

Page 34: ...ally entered the in process inspection mode To exit from this mode press the COPY FEED COPY ALL FEED COPY ALL and COPY keys in this order quickly The ERROR and PAPER LEDs will go off If these LEDs remain flashing turn the machine power off and then on and perform the same exit procedure After replacement of the main PCB it is necessary to set scanning compensation parameters stored in the EEPROM a...

Page 35: ...the drive unit and disconnect the printer motor harness from the motor NOTE After removing the drive unit take care not to drop the grounding spring L 14 Take off the motor cover by removing the screw 15 Take off the printer motor by removing the screw 16 Remove two screw from the hinge plate L and take it off ...

Page 36: ...to the motor and its end near the core to the main PCB as illustrated on the previous page When setting the drive unit back into place route the printer motor harness as shown below Route the printer motor harness through two cable guides and position the ferrite core between the cable guide and cutout as illustrated below ...

Page 37: ...through in this order with a small flat screwdriver as illustrated below 18 Push down both ends of the recording head ASSY and move it to the rear to release the tabs from the cutouts provided in the recorder frame 19 Disconnect the two harnesses recording head signal and power harnesses from the recording head ASSY and then lift it up 20 Remove three head springs ...

Page 38: ...harness from the PE cover sensor PCB 23 Take off the PE cover sensor PCB by removing the screw 24 Remove the sensor actuator as shown below n n Reassembling notes Before setting the recorder frame back into place make sure that the ACS spring is fitted in the U shaped cutout of the recorder frame as illustrated above ...

Page 39: ...emoving the films NOTE Once removed the films will become unusable and new ones will have to be put back in 25 Remove the films as shown below n n Reassembling notes Attach the adhesive face of each film to the hatched section of the printer base unit within the rib as shown above ...

Page 40: ...ner covers CIS protector and upper support frame 1 Remove the upper cover three shoulder screws 2 Remove the corner covers A and B two flat S screws M3x10 from each cover 3 Remove the CIS protector two cup S taptite screws M3x10 4 Remove the upper support frame two cup S taptite screws M3x10 ...

Page 41: ...shown below remove the three harness sponges disconnect the three CIS harnesses from the CIS units and then lift up the CIS frame NOTE When handling the CIS frame hold it as shown below taking care not to touch the glass prism bars or transparent sheets If you touch any of them be sure to wipe it with a soft cloth NEVER use alcohol to clean it ...

Page 42: ...en reinstalling the CIS frame first connect the three CIS harnesses to the CIS units according to the ID color set the CIS frame back into place and then put three sponges into the positions specified on the previous page to secure those harnesses Next set the two positioning jigs in the direction of arrows and with its shorter end facing towards the CIS units While pressing the positioning jigs i...

Page 43: ...oved the CIS clamp on the protector should be replaced with a new one Before setting the removed CIS protector back into place remove the current CIS clamp After securing the CIS protector attach a new CIS clamp instead taking care not to let the new CIS clamp protrude from the rear edge of the CIS protector When securing the upper cover temporarily tighten the three shoulder screws shown on page ...

Page 44: ... corner covers CIS protector and lower support frame 1 Remove the lower cover three shoulder screws 2 Remove the corner covers A and B two flat S screws M3x10 from each cover 3 Remove the CIS protector two cup S taptite screws M3x10 4 Remove the lower support frame two cup S taptite screws M3x10 ...

Page 45: ...e relay PCB straighten the cable clip and pull out the ferrite core of the harness Then take the WB motor harness out of the cable clamps 6 Remove the tape from the CIS harness set and straighten the two cable clips 7 Disconnect the red CIS harness from the relay PCB and pull it out from the cable clip In the same way release the yellow and blue CIS harnesses ...

Page 46: ...e the PCB support two cup S taptite screws M3x10 together with the printer copyboard interface cable and the relay PCB 11 Remove two screws two cup S taptite screws M3x6 from the relay PCB and disconnect the printer copyboard interface cable 12 Remove the printer copyboard interface cable two cup S taptite screws M3x10 on the cable clamp ...

Page 47: ...heir ferrite cores do not interfere with the white sheet and frames respectively When securing the lower support frame to the side frames sandwich the spacers between them as shown on page III 26 When securing the lower cover temporarily tighten the three shoulder screws shown on page III 26 in the center screw hole and outer screw holes center the lower cover relative to the corner covers and the...

Page 48: ...ull it out NOTE When placing the copyboard rightside up after removing the lower frame apply any pad under the copyboard to protect the grip as shown below Removing the pipe holder stoppers pipe spacer L lower pipe and its holders 3 Remove two pipe holder stoppers one cup S taptite screw M3x8 from each stopper ...

Page 49: ...holder springs from the lower pipe holders R and L 5 While scrolling the white sheet copyboard screen slide it in the direction of arrow so that the pipe spacer L can appear 6 Remove the pipe spacer L in the direction of arrow ...

Page 50: ...s the pipe gear in the direction of arrow and disengage it from the lower pipe holder L then pull out the lower pipe in the direction of arrow 8 Take out the lower pipe holders R and L in the direction of the arrows ...

Page 51: ...the difference between distances A and B shown on the next page is within 1 mm where A and B are distances from the top edge of the backboard to the rib of the upper frame If the difference exceeds 1 mm loosen not remove all screws E press the frame ASSY in the direction of C or D to fix the ASSY s distortion tighten screws E and then secure the lower corner plates R and L with screws If the frame...

Page 52: ...III 34 ...

Page 53: ...hree cup S taptite screws M3x10 from each side cover from the side covers and slide them as shown below NOTE When sliding the side covers take care not to damage the CIS harnesses 2 Cut the white sheet to be replaced with scissors NOTE Do not use a cutter or knife which could damage the sheet backup board ...

Page 54: ...III 36 3 Paste two black HP marks onto the ruled side of a new white sheet as specified below ...

Page 55: ...the old one 6 Pull the other edge of the old white sheet in the direction of the black arrow This will set the new white sheet around the sheet backup board 7 To replace the sheet backup board remove two screws one cup S taptite screw M3x10 from each side frame and pull out the board together with its supports Set a new board back into place together with the removed supports and tighten two screw...

Page 56: ...low first put a block at each of the right and left ends of the seam cut a strip of the white sticky tape longer than the width of the white sheet and temporarily attach the tape to those blocks Push the tape down to the seam of the white sheet at three points and ƒ and then press the entire tape along the seam After that cut off the excess of the tape at the right and left ends of the seam Use sc...

Page 57: ...to place take care not to damage the CIS harnesses When securing the side covers first temporarily tighten the three screws at each side cover After securing the corner covers center the side covers relative to those corner covers and then tighten those screws firmly ...

Page 58: ... lubrication points as shown below Lubricant type Manufacturer Molykote grease EM 30L or EM 30LG Dow Corning Lubricant amount Rice sized pinch of grease 6 mm3 1 Joints between the platen shaft and its bushings 2 WB motor related gears on the lower pipe holder L ...

Page 59: ...III 41 3 Lower pipe holder L 4 Lower pipe holder R ...

Page 60: ...III 42 5 Upper pipe shaft ...

Page 61: ...CHAPTER IV MAINTENANCE MODE ...

Page 62: ...ction code 55 IV 3 4 3 2 Scanning contrast adjustment Function code 07 IV 4 4 3 3 Automatic setting of the scanning compensation parameters stored in the EEPROM Function code 02 IV 5 4 3 4 Dump including page length setting error code and scanning compensation data Function code 05 IV 6 4 3 5 Test pattern print Function code 09 IV 8 4 3 6 Operational check of keys and LEDs on the control panel Fun...

Page 63: ...nce mode To select one of the maintenance mode functions listed in Section 4 2 keep the paper compartment cover opened or close it depending upon the maintenance mode functions you want to access and then press the specified key The details of each maintenance mode function are described in Section 4 3 To make the machine exit from the maintenance mode 1 Close the paper compartment cover 2 Press t...

Page 64: ...ength setting error code and scanning compensation data Function code 05 Sect 4 3 4 COPY key Test pattern print Function code 09 Sect 4 3 5 FEED key Exit from the maintenance mode COPY ALL key Reserved Never use this function Opened COPY key Operational check of keys and LEDs on the control panel Function code 13 Sect 4 3 6 FEED key Sensor operational check and EEPROM customization for page length...

Page 65: ...the COPY ALL key with the paper compartment cover opened The machine checks whether either of the two black HP marks on the copyboard screen is placed in the home position i e in the scanning position If neither mark is in the home position the machine scrolls up the copyboard screen until either mark comes to the home position After detection of either black HP mark the machine flashes the PAPER ...

Page 66: ...RROR LED stops flashing for one second and then starts flashing again 3 Press the COPY key to show the current scanning contrast Then the machine shows the current contrast by using the ERROR and PAPER LEDs as shown below Contrast Indication by ERROR and PAPER LEDs If the LEDs flash in the cycle below The current contrast level is ERROR ON once and PAPER ON four times 0 Light ERROR ON two times an...

Page 67: ... the service site 1 Open the paper compartment cover and hold down the COPY ALL and FEED keys for 15 seconds 2 Press the FEED key with the paper compartment cover opened The machine writes the automatic scanning parameter setting code into the EEPROM and returns to the regular operation mode At the user site 1 Power on the machine The machine automatically starts home positioning of the copyboard ...

Page 68: ...een LEDs in CIS0 66 bytes b White level data for green LEDs in CIS1 72 bytes c White level data for green LEDs in CIS2 63 bytes d White level data for red LEDs in CIS0 66 bytes e White level data for red LEDs in CIS1 72 bytes f White level data for red LEDs in CIS2 63 bytes g Clamp PWM value 2 bytes h Gain PWM value 12 bytes for green and red images 6 bytes color i Compensation coefficient data fo...

Page 69: ...IV 7 Dump List a b c d e f g h i ...

Page 70: ...d hold down the COPY ALL and FEED keys for 15 seconds 2 Close the paper compartment cover and press the COPY key The machine prints out the specified test pattern as shown below Upon completion of printing the machine returns to the regular operation mode Test Pattern Check these two rows of patterns for print quality Ignore other rows of patterns The print should be free from faint section white ...

Page 71: ... Sensor operational check and EEPROM customization for page length Function code 32 n n Function This function allows you to check whether the PE cover sensor works correctly After checking the sensor you select letter or A4 size for page length n n Operating Procedure 1 Open the paper compartment cover and hold down the COPY and FEED keys for 15 seconds 2 Press the FEED key with the paper compart...

Page 72: ... copying function an error will occur in the scanning test disabling the machine Both the ERROR and PAPER LEDs go off and the machine returns to the regular operation mode 8 To check that the correct page length is set print out a dump list refer to Subsection 4 3 4 9 To make sure that the R B copying function is deactivated press the COPY ALL key after performing the above procedure If images on ...

Page 73: ...CHAPTER V ERROR INDICATION AND TROUBLESHOOTING ...

Page 74: ... 2 Locating a printer or copyboard failure Important V 3 Read This First User Setup Guide for Repaired Machine V 4 5 2 3 Precautions V 5 5 2 4 Checking prior to Troubleshooting V 5 5 2 5 Troubleshooting Procedures V 6 1 Control panel related V 6 2 Copyboard screen scrolling related V 7 3 Recording paper feeding related V 7 4 Copy image related V 8 5 PC interface related V 11 ...

Page 75: ... opened according to the PE cover sensor PAPER ON A4 Faulty of white level data AB Home positioning of the copyboard screen failed The CIS cannot detect either of the black HP marks on the screen B1 Upper limit of clamp PWM value B2 Lower limit of clamp PWM value This error occurs also if interference light comes into the CIS units B3 Upper limit of gain PWM value This error occurs also if the pri...

Page 76: ... flashes once interpret it as 0 For example error code A5 is expressed as 10100101 in eight bits with the MSB first so the ERROR and PAPER LEDs will flash as follows 5 1 3 Main PCB Uncustomized Error In any of the following cases a main PCB uncustomized error will occur and the machine will enter the in process inspection mode 1 A new main PCB not a used board is installed 2 The Reserved function ...

Page 77: ...tic setting of the scanning compensation parameters Function code 02 If you replace the main PCB you need to set the scanning compensation parameters in the EEPROM Function code 55 in Subsection 4 3 1 However if only the printer has been brought to the service station you cannot do it In such a case make automatic setting of the scanning compensation parameters Function code 02 in Subsection 4 3 3...

Page 78: ...three minutes during which the PAPER LED flashes 5 Upon completion of the automatic setting the machine turns off the PAPER LED and returns to the regular operation mode 6 If the machine fails to set those parameters it will print out an error sheet If ERR A4 go to step 7 If ERR AB skip to step 8 If ERR B3 go back to step 2 7 Turn the power off and check the copyboard screen for stains Then repeat...

Page 79: ... Environmental conditions Check that 1 The machine is placed on a flat firm surface 2 The machine is used in a clean environment at or near normal room temperature 10 C to 35 C with normal relative humidity 45 to 80 3 The machine is not subjected to rapid change of the ambient temperature Moving the machine from a cold place to warm place will cause condensation inside the machine If it takes plac...

Page 80: ... LED is lit l Paper compartment cover Is it closed l Recording paper Has it run out l PE cover sensor actuator 3 The ERROR LED comes on In printing Except in printing l Unplug the machine and leave it until the thermal recording head cools down This error may occur if the print duty is so high that the recording head is overheated l Thermal recording head l Main PCB 4 Keys disabled l Main PCB l Pa...

Page 81: ...d to the piper holders Are they pasted without any gap l Sheet backup board Is it secured with the screws 4 Scrolling of the copyboard screen not smooth l Upper pipe for looseness Is the CIS frame deformed 5 Low abnormal noise made periodically l Pipes for contamination with grease or sticky dust l Flanges and ends of the pipe gears for crack or small bumps 6 Images drawn on the copyboard screen r...

Page 82: ...aulty Trouble Action to be taken 1 Completely blank At the scanner l Check the following components CIS units and their harnesses Relay PCB Main PCB At the printer l Check the following components Recording head power harness and signal harness Thermal recording head and its compression springs Main PCB 2 All black First check the printer copyboard interface cable for connection At the scanner l C...

Page 83: ...tivated in EEPROM customization Function code 32 in Subsection 4 3 7 3 Make a monochrome copy If it has no problem the scanner may be defective At the scanner l Check the following components CIS units Main PCB At the printer l Check the following components Thermal recording head and its compression springs Recording head power harness Main PCB 5 White vertical streaks At the scanner l Set the sc...

Page 84: ...he two black HP marks At the printer l Check the following components Compression springs under the thermal recording head 8 Image distortion At the scanner l Check the following components WB motor Pipe holders and their gears and springs At the printer l Check that recording paper is loaded correctly l Check the printer motor l Clean the platen with alcohol 9 Blurred image At the scanner l Adjus...

Page 85: ...ther the scanner of the machine works normally If the copy is normal the problem may be due to the PC interface Proceed to the following checks Trouble Action to be taken 1 No communication with the PC The PC cannot recognize the machine At the machine l Check the following components PC interface cable for connection or breakage Main PCB At the PC l Check that the PC interface cable designed for ...

Page 86: ...CP1800 CP2000 CB200 APPENDIX Circuit Diagrams A Main PCB B Relay PCB ...

Page 87: ...A Main PCB 1 4 ...

Page 88: ...A Main PCB 2 4 ...

Page 89: ...A Main PCB 3 4 ...

Page 90: ...A Main PCB 4 4 ...

Page 91: ...B Relay PCB ...

Page 92: ...Mar 00 SM5B1101À Printed in Japan ...

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