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Element RW-337D, Service Manual

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Element RW-337D Service Manual Download Page 17

 

RW-337D Service Manual I Page  11  of  61 

 

             

 

 

 

 

Remove the six screws (M3x4) shown in the figure with 
cross screwdriver, and take off the bottom cover. 

 

1) 

Remove  the  four  screws  (ST2.9x6)  shown  in  the 
figure with cross screwdriver; 

2) 

Take off the top cover. 

 

Remove the four screws (ST2.9x6) shown in the figure 
with cross screwdriver, and take off the front cover. 

 

Summary of Contents for RW-337D

Page 1: ...RW 337D Service Manual I Page 1 of 61 RW 337D Receipt Printer Service Manual ...

Page 2: ...product or have any doubt about safety issues that might arise from using it please feel free to contact your dealer No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without the express written permission of element Copyright Copyright 2021 by Element Warning and Caution Warning Items shall be strictly followed to avoid ...

Page 3: ... print head and other electronic components 4 Time between turning on and turning off the printer should be no less than 20 seconds 5 Do not print without paper and ribbon otherwise you may damage the print bar and print head 6 In order to ensure the stable work of each components and printer s lifetime you need to conduct a regular maintenance monthly at least The regular maintenance includes pri...

Page 4: ...unction 5 3 2 3 Serial connection 5 3 3 Parallel interface 5 3 3 1 Parameter 5 3 3 2 Time Sequence of the Parallel Interface Module 5 3 3 3 Interface signal 6 3 3 4 Parameter 7 3 3 5 Effect of printer s status on parallel interface 7 3 4 Ethernet interface 7 3 4 1 Interface character 7 3 4 2 Protocol supported 7 3 4 3 Electrical character 8 3 4 4 Frame type 8 3 4 5 Interface signal 8 4 Disassembly...

Page 5: ...replacement 29 5 1 6 Upper mark sensor replacement 30 5 1 7 Lower mark sensor replacement 31 5 1 8 HP sensor replacement 32 5 1 9 Paper sensor replacement 32 5 2 Printer adjustment 33 5 2 1 Print spacing adjustment 33 5 2 2 Tighten transmission belt of carriage 34 6 Error Types and Processing 35 7 Troubleshooting 36 7 1 Abnormal print effect 36 7 2 Abnormal paper detection 36 7 3 Printing with noi...

Page 6: ...RW 337D Service Manual I Page 6 of 61 Appendix 5 Exploded drawing of the printer 46 Appendix 6 Part list 49 Appendix 7 Outline drawing 53 Appendix 8 Main board layout 54 Appendix 9 Lubrication 55 ...

Page 7: ...s 0 05 0 08mm total thickness 0 14 mm Character Character type Font A 9 9 Font B 7 9 Chinese 16 16 Characters line Default 76mm 69 5mm 57 5mm Font A 33 CPL 30 CPL 25 CPL Font B 40 CPL 36 CPL 30 CPL Chinese 22 CPL 20 CPL 16 CPL Character size Default Font A 1 6 3 1mm Font B 1 2 3 1mm Chinese 2 7 2 9mm Characters inch Default Font A 13 3CPI Font B 16CPI Chinese 8 9CPI Data buffer Receiving buffer 64...

Page 8: ...lock diagram is shown as below CPU FLASH Communication interface module Communication interface module STY_HHEAD Print head drive circuit Power input interface COV2 COV1 BM2 PE BM1 PLOW 1 PLOW 2 HP CN500 MOTO1 KEY_LED 1 MOTO2 Power switch Cutter drive circuit Motor drive circuit Printer mechanism Communication interface module Host Host Communication interface module Main Control Board Unit Block ...

Page 9: ...RW 337D Service Manual I Page 3 of 61 Position of all the sockets in the main control board ...

Page 10: ...ction Host Printer VBUS VBUS DATA DATA DATA DATA GND GND Caution The vertical USB interface cannot be used when set the receiving buffer to 40Bytes 3 2 Serial interface 3 2 1 Parameter Data transmission Asynchronous serial communicate Handshaking DTR DSR or XON XOFF Voltage MARK 3 to 15V Logic 1 OFF SPACE 3 to 15V Logic 0 ON Baud rate 1200 2400 4800 9600 19200 38400 57600 bps bps bits per second D...

Page 11: ...2 3 Serial connection Host Printer TXD RXD RXD TXD DSR DTR CTS RTS RTS CTS DTR DSR FG FG SG SG 3 3 Parallel interface Parallel interface works under IEEE1284 compatible mode and byte mode 3 3 1 Parameter Data transmission 8 bit parallel Synchronized mode Externally supplied nStrobe signals Handshaking mode Busy Signal Handshaking pressure TTL compatible Connector IEEE 1284 B CENTRONICS socket 3 3 ...

Page 12: ...t Bit 27 Signal Ground 10 P Ack 28 Signal Ground 11 P Busy 29 Signal Ground 12 P PError 30 Signal Ground 13 P Select 31 H nInit 14 H nAutoLF 32 P nFault 15 Not defined 33 Signal Ground 16 Logic Gnd 34 Not defined 17 Chassis Gnd 35 Not defined 18 P Peripheral Logic High 36 H nSelectIn Parallel interface signal definition Caution H stands for host end P stands for printer end Parallel interface sign...

Page 13: ... above error occurs user can inquire the printer s status from the pin of parallel interface 3 4 Ethernet interface 3 4 1 Interface character Supports 10BASE T communication Ethernet II frame type compatible LED indicates the net connection status and data transmission status Supports 9100 port printing Supports status back Supports parameter configuration Supports firmware update online Supports ...

Page 14: ...e is no more than 2 5V Input signal If the differential mode voltage is more than 160mV then it is valid signal 3 4 4 Frame type Compatible with the frame type of Ethernet II format 3 4 5 Interface signal The interface use 10BASE T standard which comply to IEEE802 3 Pin Signal Name Description 1 TX Data sending 2 TX Data sending 3 RX Data receiving 4 NC Reserved 5 NC Reserved 6 RX Data receiving 7...

Page 15: ... cables When handling the print head or electronic component make sure to take some measures to protect it from electrostatic charge During maintenance be careful not to leave parts or screws loose inside the printer During maintenance be careful not to damage the print head surface and the print bar 4 1 Maintenance Tools Maintenance Tools Cross screwdriver Sharp nose pliers Wire cutter Assistant ...

Page 16: ...cture Instructions Top view of printer 1 Remove the two screws ST2 9x8 shown in the figure with the cross screwdriver 2 Take off the vertical pluggable interface board shown in the figure 1 Push out the power cover plate in the arrow direction 2 Take off the built in power supply from its location position ...

Page 17: ...n in the figure with cross screwdriver and take off the bottom cover 1 Remove the four screws ST2 9x6 shown in the figure with cross screwdriver 2 Take off the top cover Remove the four screws ST2 9x6 shown in the figure with cross screwdriver and take off the front cover ...

Page 18: ... the cover locking unit at the back of middle cover with appropriate force and take off the middle cover 4 Take off the baffle of middle cover with appropriate force upward Notes Please do not pull the connection wire to avoid damage to the wire when plug and unplug the connection wire Remove the two screws ST2 9x6 shown in the figure with cross screwdriver and take off the button board ...

Page 19: ...ntrol board with a moderate force 2 Remove the four screws M3x5 with the screw driver and take off the main control board Notes Please keep the main control board safely to avoid scratching and short circuit Please do not pull the connection wire to avoid damage to the wire when plug and unplug the connection wire 1 Remove the two screws M2x8 shown in the figure at with cross screwdriver and take ...

Page 20: ...tation shaft of stationary blade cutter with sharp nose pliers pull out the rotation shaft of stationary blade along the arrow direction and disassemble the stationary blade module Remove the two screws M3x7 shown in the figure with cross screwdriver and take off the cutter bracket and stationary blade cutter Notes Please be careful to keep the stationary blade disassembled to avoid damage to huma...

Page 21: ...olders of stationary blade 4 2 4 Disassemble the non retraction platen roller module Picture Instructions 1 Cut off the cable tie of cutter cable with wire cutter 2 Take off one E ring at one end and one E ring at the middle of the rear rotation shaft with sharp nose pliers pull out the rear rotation shaft along the arrow direction shown in the figure and then disassemble the non retraction platen...

Page 22: ...te 1 Disassemble the two E rings shown in the figure with sharp nose pliers 2 Take off the gear of platen roller and sleeve of platen roller shaft respectively and then disassemble the paper feeding platen roller 1 Disassemble the two 3 5mm E rings shown in the figure with sharp nose pliers 2 Disassemble the hook rotation shaft in the direction shown in the figure 3 Disassemble the hook module and...

Page 23: ...2x4 shown in the figure with cross screwdriver and disassemble the mark sensor and its dustproof cover 4 2 5 Disassemble the paper cabinet module Picture Instructions 1 Cut off the cable ties of all wires with wire cutter 2 Remove the four ST2 9x6 screws shown in the figure with cross screwdriver and take the paper cabinet module off from circuit board box Unscrew the two ST2 6x6 screws with the c...

Page 24: ...the figure with cross screwdriver and then take off the left side plate module of paper cabinet 1 Remove the one screw M3x6 at shown in the figure with cross screwdriver and then take off the damping washer 2 Remove the two screws M3x8 at shown in the figure with cross screwdriver and then take off the paper feeding motor and gear 31 17 1 Remove the one screw ST2 6x6 at shown in the figure with cr...

Page 25: ...in the arrow direction shown in the figure 1 Take off the paper roll guide with a moderate force in the arrow direction shown in the figure 2 Take off the paper near end sensor adjustment lever in the arrow direction shown in the figure Take off the paper roll shaft in the arrow direction shown in the figure Remove the three screws ST2 9x6 shown in the figure with cross screwdriver and take off th...

Page 26: ...rews ST2 9x6 shown in the figure with cross screwdriver and take the print module off 1 Take off the tension spring shown in the figure with sharp nose pliers 2 Take off the one E ring shown in the figure with sharp nose pliers 3 First move the ribbon support plate 4mm to the left side in the horizontal direction as the arrow shown and then lift up the ribbon support plate so as to take the ribbon...

Page 27: ...centric bushing at left and right sides at the arrow shown so as to make the eccentric bushings to superpose with the notches of the side plate 3 Take off the left side eccentric bushing and the right side eccentric bushing at the arrow and shown 4 Take off the guide shaft at the arrow shown Remove the two screws ST2 9x6 shown in the figure with cross screwdriver and take off the ribbon support pl...

Page 28: ...rd Remove the three screws ST2 9x6 shown in the figure with cross screwdriver and take off the right side board Remove the two screws ST2 9x6 shown in the figure with cross screwdriver and take off the gear dustproof cover Remove the two screws ST2 9x6 shown in the figure with cross screwdriver and then take off the tight plate and timing belt ...

Page 29: ...ers and then take off the tight wheel Take off the one E ring shown in the figure with sharp nose pliers and then take off the transition gear and balance wheel module Take off the one E ring shown in the figure with sharp nose pliers and take off the gear 3 Take off the gear 1 and ribbon rotation wheel ...

Page 30: ... off the driving pulley Remove the one screw ST2 9x6 shown in the figure with the screwdriver and take off the HP sensor Remove the two screws M3x8 shown in the figure with cross screwdriver and take off the carriage motor 4 3 Assemble the printer Assemble the printer in the reverse sequence of printer disassembly ...

Page 31: ...of ribbon support plate as shown in the figure 3 Move the ribbon holder 4mm in the arrow direction and then lift it in the arrow direction and take the ribbon spring off then take the ribbon holder off 4 Open the rear cover remove the two screws ST2 6x10 and take off ribbon guide plate then take off the print head from carriage and pull out the print head cable with moderate force in the arrow dir...

Page 32: ...hen disassembling or reassembling it Please make sure that the cable print head connect to the print head firmly Please avoid squeezing the cable in reassembly When reassembling the print head please position the print head on carriage and ribbon correctly and fix the screws firmly 5 1 2 Cutter replacement Stationary blade replacement 1 Turn off the power 2 After the print head cooling down open t...

Page 33: ...f the power 2 After the print head cooling down disassemble the cover according to 4 2 1 3 Cut the cable ties and detach the cutter cable off from the main control board 4 Remove the two screws ST2 9X6 and disassemble the movable blade together with the cutter holder 5 Remove the two screws M3X5 and disassemble the movable blade ...

Page 34: ... to section 4 2 1 3 Pull out the cables from main control board with moderate force and then disassemble the main control board with reference to section 4 2 2 4 Install a new control board in the reverse steps Caution While disassembling the locking frame of printer the force must be moderate to avoid damaging the cover of printer Please do not drag the connecting cable while pulling the cable ou...

Page 35: ...feed motor please fix all screws firmly 5 1 5 CR motor replacement 1 Turn off the power 2 Disassemble the printer cover after print head cooling down with reference to section 4 2 1 3 Pull out the cables of CR motor HP sensor and print head from the main control board 4 Disassemble the transmission module with reference to section 4 2 6 5 Remove the two ST2 9X6 screws and take off the gear dust pr...

Page 36: ... cover with reference to section 4 2 1 then pull out the cable of upper mark sensor form the main control board 3 Remove the two ST2 9X6 screws with cross screwdriver and disassemble the movable blade module as shown in the figure 4 Take off the one E ring shown in the figure with sharp nose pliers then take off the gear 30 and gear 31 17 5 Cut the cable tie shown at in the figure with wire cutter...

Page 37: ...assemble the printer cover with reference to 4 2 1 then pull out the cables of paper near end sensor paper feed motor paper end sensor rear cover micro switch and lower mark sensor from main control board 3 Remove the four ST2 9X6 screws with cross screwdriver and disassemble the paper cabinet module as shown in the figure 4 Remove the two ST2 9X6 screws with cross screwdriver and disassemble the ...

Page 38: ...the one ST2 9X6 with cross screwdriver and disassemble the HP sensor as shown in the figure 4 Install a new HP sensor in the reverse steps Caution While disassembling the locking frame of printer the force must be moderate to avoid damaging the cover of printer Please do not drag the connecting cable while pulling the cable out of main control board to avoid breaking the cable connector Please mak...

Page 39: ... Printer adjustment 5 2 1 Print spacing adjustment 1 Turn off the power 2 Disassemble the printer cover with reference to 4 2 1 after print head cooling down 3 Measure the print spacing with feeler gauge and compare with standard distance 0 5 0 05mm if the distance is bigger than standard distance please rotate the eccentric bushing at both sides in arrow direction until the print spacing measured...

Page 40: ...cover of printer In reassembling please fix all screws firmly 5 2 2 Tighten transmission belt of carriage 1 Turn off the power 2 After the print head cooling down open the front cover and take off the ribbon 3 Remove the two ST2 9X6 screws with cross screwdriver tighten the transmission belt in the arrow direction about 1 2 kg force then fix the two screws to complete tightening transmission belt ...

Page 41: ...n unrecoverable About 3 2S Off About 3 2S Send command DLE ENQ 2 after closing rear cover Rear cover open recoverable About 3 2S Off About 3 2S Close rear cover Front cover open About 3 2S Off About 3 2S Close front cover Paper end About 3 2S On About 3 2S Automatically come back to normal status after loading paper Paper near end About 3 2S On Replace roll paper Notes The priority sequence of err...

Page 42: ...te the ribbon knob two to three times clockwise to tighten the ribbon baseband The ink of ribbon is used up please replace a new ribbon The installation of the ribbon is not correct please install the ribbon again The toothed belt is too loose please ask the technician to adjust the tension of the toothed belt The print spacing is too small please ask the technical personnel to adjust the spacing ...

Page 43: ...is deformed please ask the technical personnel to replace it 7 5 Abnormal cutter action 1 Problems Cutting is not completely and noise is abnormal Possible causes and solutions There are too many scraps of paper and dust accumulated inside the cutter please remove the scraps of paper and dust The cutter is worn out badly please ask the technician to replace the cutter The cutter is not installed i...

Page 44: ...ck whether foreign material exists in the gears or not If so please clear it The installation position of HP sensor is not correct please ask the technical personnel to install it again The wire of HP sensor is broken please ask the technical personnel to replace it The HP sensor is damaged please ask the technical personnel to replace it The main control board is damaged please ask the technical ...

Page 45: ...ear cover is open then press down the FEED button while you turn on the printer and release the FEED button after carriage was verified Close the rear cover after confirming there is paper then the printer will enter into dump mode 2 Send command 0x1D 0x28 0x41 0x02 0x00 0x00 0x01 the printer will enter into dump mode Terminate Hexadecimal Dump mode Send command 0x1D 0x28 0x41 0x02 0x00 0x00 0x01 ...

Page 46: ...Select printer ESC n 1B 3F n 027 063 n Cancel user defined characters ESC 1B 40 027 064 Initialize printer ESC D 1B 44 027 068 Set horizontal tab positions ESC E n 1B 45 n 027 069 n Turn on off bold mode ESC G n 1B 47 n 027 071 n Turn on off double printing mode ESC J n 1B 4A n 027 074 n Print and feed n lines ESC K n 1B 4B n 027 075 n Print and reverse feed n lines ESC M n 1B 4D n 027 077 n Selec...

Page 47: ...Disable Auto Status Back ASB GS r n 1D 72 n 029 114 n Transmit status GS z 0 1D 7A 30 029 122 048 Set the waiting time of online recovery FS n 1C 21 n 028 033 n Select Kanji character mode FS 1C 26 028 038 Select Kanji mode FS n 1C 28 n 028 045 n Select cancel Kanji and underline mode FS 1C 2E 028 046 Cancel Kanji mode FS 2 1C 32 028050 Define user defined Kanji character FS 1C 3F 028 063 Cancel u...

Page 48: ...30 Cutter enabled 0 Disabled 1 Enabled 35 Distance between print position to mark Indicated by feeding steps 37 Distance between cut position to mark Indicated by feeding steps 40 Serial software handshaking 0 Disable software handshaking 1 Enable software handshaking 44 Stop printing when paper near end 0 Does not stop printing when paper near end 1 Stop printing when paper near end 58 Buzzer ena...

Page 49: ...t head FFC 7190 9005477 Ribbon drive gear 8203 9000490 Mark sensor 7600 9031882 Microswitch of front cover 7600 9014125 Microswitch of end cover 7600 9011464 Paper end sensor 7600 9005462 horizontal paper near end sensor 7600 9034616 vertical paper near end sensor 7600 9031884 HP sensor 7600 9031883 Platen roller 8301 9009121 ...

Page 50: ...age shaft sleeve Only ND220 8400 9021307 Paper guide elastic plate 8104 9009186 Paper feed motor 3200 9004997 Carriage motor 3200 9015008 Gear Driving gear 8221 9000487 Tight gear 8221 9000488 Paper feed gear Platen roller gear 18 8203 9002066 Transition gear 7702 9009477 ...

Page 51: ... 9001160 Print gear Transition gear 25 19 8203 9000489 Gear 3 42 17 8203 9001158 Scan gear 1 25 15 8203 9001159 Timing tooth belt 4930 9018827 Cutter 3100 9040048 Main control board 7201 9034525 Button and LED 7600 9031881 Button label English 8012 9028534 ...

Page 52: ...RW 337D Service Manual I Page 46 of 61 Appendix 5 Exploded drawing of the printer 1 Exploded drawing of cover module 2 Exploded drawing of print module ...

Page 53: ...RW 337D Service Manual I Page 47 of 61 3 Exploded drawing of stationary blade 4 Exploded drawing of platen roller module ...

Page 54: ...RW 337D Service Manual I Page 48 of 61 5 Exploded drawing of paper cabinet module 6 Exploded drawing of control board box module ...

Page 55: ...ate 1 18 3009 9027965 Print head 1 19 8007 9004692 RW 337D 01 01 09 03R Dustproof woolen washer 2 Only ND220 20 8400 9021307 RW 337D 01 09 19R Carriage shaft sleeve 2 Only ND220 21 8207 9036555 RW 337D 01 01 16R Carriage 1 8207 9004678 RW 337D 01 09 18R Carriage with shaft sleeve 1 Only ND220 22 8 1 04 9004609 RW 337D 01 01 09 01R Carriage elastic plate 1 23 8204 9004676 RW 337D 01 01 14R Eccentri...

Page 56: ...rew 1 56 8104 9009190 RW 337D 01 09 08R Holder of paper press wheel 1 57 8204 9009192 RW 337D 01 09 10R paper press wheel paper pulling structure 1 58 8001 9010102 RW 337D 01 09 14R Supporting shaft of paper press wheel 1 59 4400 9000294 Φ2mm E ring 1 60 8103 9007681 RW 337D 01 01 04 01R Right supporting plate of stationary blade 1 61 3100 9040048 Cutter sliding blade 1 62 8103 9009183 RW 337D 01 ...

Page 57: ...proof cover 1 93 7600 9031882 Mark sensor 1 94 4002 9000282 ST2 2 4 Pan head self tapping screw 2 95 8201 9036929 RW 337D 01 03 11R Pressure plate of paper end sensor 1 96 7600 9005462 Paper end sensor 1 97 8104 9009186 RW 337D 01 09 04R Paper guide elastic plate 1 98 8201 9036888 RW 337D 01 03 13R Paper roll baffle 1 99 8101 9028541 RW 337D 01 06R Right plate of paper cabinet 1 100 4002 9001163 S...

Page 58: ...0057 M2 8 Pan head screw 2 111 4200 9004101 Φ2 Flat washer 2 112 7201 9034525 NDLKV1 0 Main board 1 113 8103 9028537 RW 337D 01 02R Pluggable interface board USB cash drawer 1 8103 9028538 RW 337D 01 03R Pluggable interface board Ethernet cash drawer 1 ...

Page 59: ...RW 337D Service Manual I Page 53 of 61 Appendix 7 Outline drawing ...

Page 60: ...RW 337D Service Manual I Page 54 of 61 Appendix 8 Main board layout Top side of Main control board Bottom side of Main control board ...

Page 61: ...ing principle 1 Please lubricate joint point of gear and gear shaft do not lubricate gear tooth 2 Please do not lubricate platen roller shaft and its sleeve 3 Please lubricate the carriage guide shaft in maintenance Caution The lubrication grease is special EM50 please ask distributor or manufacture for advice ...

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