TOSHIBA Thermal Printer B-852-R SERIES Maintenance Manual Document No. EO18-33018 Original (Revised Mar.
EO18-33018 TABLE OF CONTENTS Page 1. UNPACKING --------------------------------------------------------------------------------------------1- 1 1.1 1.2 PROCEDURES --------------------------------------------------------------------------------------------- 1- 1 CHECKS ----------------------------------------------------------------------------------------------------- 1- 2 2. MAJOR UNIT REPLACEMENT --------------------------------------------------------------------2- 1 2.1 2.2 2.3 2.4 2.5 2.
1. UNPACKING EO18-33018 (Revision Date: Sep. 28, 2007 1.1 Procedure 1. UNPACKING 1.1 Procedure 1) 2) 3) Open the carton. Unpack the accessories from the carton. Unpack the pads and the printer from the carton.
1. UNPACKING EO18-33018 (Revision Date: Sep. 28, 2007) 1.2 Checks 4) 5) 6) Remove the five pieces of tape from the printer. Open the top cover. Remove the one piece of tape. Top Cover Tape Tape Tape 7) 8) Press down the head block release lever (1) and raise the print head block (2). Remove the print head pad (3). Print Head Block 2 Print Head Pad 1 3 Head Block Release Lever 9) Place the printer on a level surface.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.1 OPENING AND REMOVING THE COVERS 2. MAJOR UNIT REPLACEMENT WARNING! Disconnect the power cord before replacing the parts. 2.1 OPENING AND REMOVING THE COVERS 1) 2) 3) Turn the power off. Open the top cover. Remove the three B-4x6 screws to detach the side cover R. B-4x6 Screw B-4x6 Screw Top Cover Side Cover R NOTE: After removing the screws, unhook the side cover R from portion A by lifting and moving it toward the front of the printer.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.1 OPENING AND REMOVING THE COVERS NOTE: After removing the screws, unhook the side cover L from portion B by lifting and moving it toward the front of the printer. Hook Portion B Side Cover L 5) Disconnect the operation panel harness from CN13 on the MAIN PC Board. Operation Panel Harness CN13 MAIN PC Board NOTE: Instructions to open the top cover and to detach the side covers L and R are omitted from each removal/installation procedure provided below. 2.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.3 Replacing the MAIN PC Board 2.3 Replacing the MAIN PC Board 1) 2) 3) Prior to replacing the MAIN PC board, print out the parameter settings for future reference. Remove the side cover L from the printer. (Refer to Section 2.1.) Remove the three SMW-3x6 screws to detach the rear frame cover. SMW-3x6 Screw Rear Frame Cover 4) Disconnect the harnesses from CN1, CN2, CN5, CN8, CN9 and CN500 on the MAIN PC board.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.3 Replacing the MAIN PC Board 4) Remove the two SMW-4x8 screws, SMW-3x6 screw and B-3x6 screw. SMW-4x8 Screw MAIN PC Board Ass’y B-3x6 Screw 5) SMW-3x6 Screw Disconnect the power harness from CN8 on the MAIN PC board ass’y, then remove the MAIN PC board ass’y from the printer.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.3 Replacing the MAIN PC Board 6) Remove the two B-3x6 screws and the two SMW-3x6 screws, then remove the MAIN PC board from the MAIN PCB support frame. MAIN PC Board B-3x6 Screw 7) MAIN PCB Support Frame SMW-3x6 Replace the MAIN PC board with a new one, and reassemble in the reverse order of removal. MAIN PC Board 8) After replacing the MAIN PC board, perform the following operations. (1) Perform a RAM clear.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.4 Replacing the Panel PC Board 2.4 Replacing the Panel PC Board 1) 2) Remove the side cover L from the printer. (Refer to Section 2.1.) Remove the PT-3x8 screw to detach the operation panel ass’y from the side cover L in the direction indicated by the arrow. Side Cover L Operation Panel Ass’y PT-3x8 Screw 3) 4) Disconnect the operation panel harness from CN2 on the panel PC board. Disconnect the flat cable from CN3 on the panel PC board.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.4 Replacing the Panel PC Board 5) Remove the two PT-3x6 screws and W-4 washers to detach the panel PC board from the operation panel cover. Operation Panel Cover Flat Cable E Plate Key Switch Panel PC Board W-4 W-4 PT-3x6 Screw 6) Replace the panel PC board with a new one, then reassemble in the order removal. 7) Turn the power on, then confirm that the LCD message is displayed properly.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.5 Replacing the Stepping Motor 2.5 Replacing the Stepping Motor 1) Remove the side cover L and MAIN PC board ass’y from the printer. (Refer to Sections 2.1 and 2.3.) 2) Remove the two SMW-3x6 screws to detach the PCB support plate from the printer. SMW-3x6 Screw PCB Support Plate 3) Remove the two SM-4x8 screws to detach the stepping motor from the printer. SM-4x8 Screw 4) SM-4x8 Screw Stepping Motor Disconnect the harness from the stepping motor.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.5 Replacing the Stepping Motor NOTE: Apply FLOIL to the stepping motor’s pulley and the motor gear when reassembling the stepping motor.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) Prior to replacing the sensors or ribbon motor, perform the following operations. 1) Open the top cover. (Refer to Section 2.1.) 2) 3) Remove the side cover L from the printer. (Refer to Section 2.1.) Press down the head block release lever and raise the print head block.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) 3) 4) Replace the head up sensor with a new one, then reassemble in the reverse order of removal. Perform a test print to print to confirm that the printer works properly. NOTE: Be careful not to damage the slit sensor (Rewind/Feed) when replacing it, as this may cause a malfunction. 2.6.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) 5) Push and release the hook A, then release the hook B to remove the slit sensor from the sensor holder. Slit Sensor Sensor Holder 1 2 Hook A 1 Hook B 6) Replace the slit sensor with a new one, then reassemble in the reverse order of removal. 7) Perform a test print to print to confirm that the printer works properly. NOTES: 1.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) NOTES: 1. After replacing the ribbon motor, refer to Section System Mode Manual to perform a Maintenance Counter clear. 2. Secure the ribbon motors while inserting a 0.1 mm-thick paper (or folded backing paper) between the ribbon motor pulley and the idler gear to adjust the backlash. After the ribbon motors is secured, remove the paper.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.7 Replacing the Platen 2.7 Replacing the Platen 1) Prior to replacing the platen, print out the maintenance counter for future reference. 2) Open the top cover, and raise the print head block by pressing down the head block release lever. Top Cover Print Head 2 Head Block Release Lever 1 3) While pulling the top part of the platen holders L and R to the center of the printer, move them to the front of the printer to remove.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.7 Replacing the Platen 6) Replace the platen with a new one, then reassemble in the reverse order of removal. NOTE: When reassembling, confirm the orientation of the shaft holder. (See the picture below.) Platen Shaft Holder 7) Perform a test print to confirm that the printer works properly.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.8 REPLACING THE MEDIA SENSOR 2.8 REPLACING THE MEDIA SENSOR 2.8.1 Feed Gap Sensor (TR) and Black Mark Sensor (Upper Side) 1) Open the top cover and raise the print head block. 2) Pull up the two tabs of the sensor case cap to remove it from the sensor block. 3) Remove the feed gap sensor (TR) and black mark sensor (upper side) from the sensor case. Disconnect the media sensor harness.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.8 REPLACING THE MEDIA SENSOR 2.8.2 Feed Gap Sensor (LED) and Black Mark Sensor (Lower Side) 1) 2) 3) 4) Remove the platen holder R, platen holder L, platen, and strip plate from the printer Remove the SMW-4x8 screw to detach the front cover from the printer. Unhook the two springs. Remove the two SMW-3x6 screws to detach the sensor block from the pritner.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.8 REPLACING THE MEDIA SENSOR NOTES: 1. When reassembling the sensor case cap, fit the hooks of the sensor case into portion A of the sensor case cap. 2. When reassembling the sensors, align the pins on the sensor case with the holes of the sensors. 3. Connect the harness including the green wire to the black mark sensor (lower side). 4. Pass the media sensor harness between the harness guides.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.9 REPLACING THE PRINT HEAD 2.9 REPLACING THE PRINT HEAD CAUTION: 1. Never touch the print head element when handling the print head. 2. Never touch the connector pins to avoid a breakdown of the print head by static electricity. 3. Never remove the screws which secure the print head to the bracket. Doing so may cause improper print quality. NEVER remove these screws. Bracket Print Head 4. Never disassemble the head block frame.
2. MAJOR UNIT REPLACEMENT EO18-33018 (Revision Date: May 21, 2007) 2.10 Replacing the PS Unit and Reactor 2.10 Replacing the PS Unit and Reactor WARNING! 1. Hazardous electrical parts. Before disassembling the unit, unplug the power cord from the mains. 2. As the printer block and PS unit are heavy, be careful not to pinch your fingers or drop it on your feet. 3. The PS unit should be replaced as a unit. Never disassemble the PS unit. Doing so may cause a fire or machine failure.
2. MAJOR UNIT REPLACEMENT EO18-33018 (Revision Date: May 21, 2007) 2.10 Replacing the PS Unit and Reactor 5) Disconnect the PSU harness from CN4 on the PS unit. PSU Harness PS Unit CN4 6) Disconnect the harnesses from CN1 on the PS unit. harness from CN2, too. For the QP and CN models, disconnect the 7) Remove the two SMW-4x8 screws to detach the PS unit from the PSU base. 8) Remove the SMW-4x8 screws to detach the reactor from the PSU base.
2. MAJOR UNIT REPLACEMENT EO18-33018 2.10 Replacing the PS Unit and Reactor 9) Replace the PS unit or reactor with a new one, then reassemble in the reverse order of removal. WARNING! Pass the reactor harness and inlet harness through the cut in the PS unit frame. Care must be taken not to pinch the harnesses in the frame. Failure to do this may break the harnesses causing a fire or electric shock.
3. PERIODIC MAINTENANCE PROCEDURE EO18-33018 3. PERIODIC MAINTENANCE PROCEDURE 3. PERIODIC MAINTENANCE PROCEDURE WARNING! 1. Be sure to turn the power off before cleaning the cutter unit. 2. As the cutter blade is sharp, care should be taken not to injure yourself when cleaning. All machines are generally delivered in their best condition. To maintain optimal operating condition and help gain maximum performance and life of machines, we would recommend you to conduct periodic maintenance.
3. PERIODIC MAINTENANCE PROCEDURE EO18-33018 3. PERIODIC MAINTENANCE PROCEDURE 3) Clean the print head elements with the TOSHIBA TEC-approved print head cleaner. (Please instruct your customers to clean them daily.) Print Head Cleaner Print Head Print Head Element 4) Remove any paper dust and glue of the label. Wipe off moving range of the media sensor.
3. PERIODIC MAINTENANCE PROCEDURE EO18-33018 3. PERIODIC MAINTENANCE PROCEDURE 5. Apply FLOIL G-488 to the cutter unit using a soft cloth. 6. Clean the Cutter Blade with a cotton swab moistened with absolute ethyl alcohol. Cutter Blade Cutter Unit 7. Confirm that the problem occurs as reported, and then take corrective action. 8. Replace the following parts periodically, if necessary. product life for each part. No.
3. PERIODIC MAINTENANCE PROCEDURE EO18-33018 3. PERIODIC MAINTENANCE PROCEDURE 11. Clean the outside of the printer. 12. Fill out a report form. Hand it to the manager and obtain a signature.
4. TROUBLESHOOTING EO18-33018 4. TROUBLESHOOTING 4. TROUBLESHOOTING Problems Power does not turn ON. Cause 1. Input voltage to the printer is not within the rated voltage. Solution Replace the power cable or power inlet. 2. Output voltage from the printer is not Replace the PS unit. within the rated voltage. LED or LCD does not light. Poor printing Printer does not print. Dot missing Blurred print 3. No voltage to the MAIN PC board.
4. TROUBLESHOOTING EO18-33018 4. TROUBLESHOOTING Problems Media feed failure Cause 1. Media is not set properly. 2. Poor media quality 3. Improper adjustment of the feed gap sensor or black mark sensor. 4. Threshold is improper. 5. Failure of the feed gap sensor or black mark sensor 6. The cutter mechanism is not installed properly. 7. Failure of the stepping motor. Communication error 1. Failure of the communication cable 2. Failure of the RS-232C connector 3. Failure of the communication connector 4.
