Summary of the content on the page No. 1
TOSHIBA Thermal Printer
B-852-R SERIES
Maintenance Manual
Document No. EO18-33018
Original Mar., 2006
(Revised )
PRINTED IN JAPAN
Summary of the content on the page No. 2
EO18-33018 TABLE OF CONTENTS Page 1. UNPACKING --------------------------------------------------------------------------------------------1- 1 1.1 PROCEDURES---------------------------------------------------------------------------------------------1- 1 1.2 CHECKS-----------------------------------------------------------------------------------------------------1- 2 2. MAJOR UNIT REPLACEMENT --------------------------------------------------------------------2- 1 2.1 OPENING AN
Summary of the content on the page No. 3
1. UNPACKING EO18-33018 (Revision Date: Sep. 28, 2007 1.1 Procedure 1. UNPACKING 1.1 Procedure 1) Open the carton. 2) Unpack the accessories from the carton. 3) Unpack the pads and the printer from the carton. Caution Label (QQ/QP model) Supply Holder Frame (L) and (R) Wing Bolt Caution Label Instruction Print Head Cleaner (QQ/QP model) Unpacking Instruction Power Cord Supply Holder Base Owner’s Manual Supply Holder Pad A Top Pad Supply Holder Pad
Summary of the content on the page No. 4
1. UNPACKING EO18-33018 (Revision Date: Sep. 28, 2007) 1.2 Checks 4) Remove the five pieces of tape from the printer. 5) Open the top cover. 6) Remove the one piece of tape. Top Cover Tape Tape Tape 7) Press down the head block release lever (1) and raise the print head block (2). 8) Remove the print head pad (3). Print Head Block 2 1 Print Head Pad 3 Head Block Release Lever 9) Place the printer on a level surface. 10) Please attac
Summary of the content on the page No. 5
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) Turn the power off. 2) Open the top cover. 3) 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 printe
Summary of the content on the page No. 6
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 procedur
Summary of the content on the page No. 7
2. MAJOR UNIT REPLACEMENT EO18-33018 2.3 Replacing the MAIN PC Board 2.3 Replacing the MAIN PC Board 1) Prior to replacing the MAIN PC board, print out the parameter settings for future reference. 2) Remove the side cover L from the printer. (Refer to Section 2.1.) 3) 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. CN9 (Print Head Harness,
Summary of the content on the page No. 8
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 SMW-3x6 Screw 5) Disconnect the power harness from CN8 on the MAIN PC board ass’y, then remove the MAIN PC board ass’y from the printer. Power Harness MAIN PC Board Ass’y CN8 2-4
Summary of the content on the page No. 9
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 MAIN PCB Support Frame SMW-3x6 B-3x6 Screw 7) 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) Restore the
Summary of the content on the page No. 10
2. MAJOR UNIT REPLACEMENT EO18-33018 2.4 Replacing the Panel PC Board 2.4 Replacing the Panel PC Board 1) Remove the side cover L from the printer. (Refer to Section 2.1.) 2) 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) Disconnect the operation panel harness from CN2 on the panel PC board. 4) Disconnect the flat cable from CN3 o
Summary of the content on the page No. 11
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. 2-7
Summary of the content on the page No. 12
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 Stepping Motor SM-4x8 Screw 4) Disconnect the harness from the
Summary of the content on the page No. 13
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. Pulley Motor Gear Stepping Motor 2-9
Summary of the content on the page No. 14
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) Remove the side cover L from the printer. (Refer to Section 2.1.) 3) Press down the head block release lever and raise the print head block.
Summary of the content on the page No. 15
2. MAJOR UNIT REPLACEMENT EO18-33018 2.6 Replacing the Head Up Sensor, Slit Sensor (Rewind/Feed) and Ribbon Motor (Rewind/Feed) 3) Replace the head up sensor with a new one, then reassemble in the reverse order of removal. 4) 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 Replacing the Slit Sensor (Rewind/Feed) 1) Remove the two SMW-3x6 scr
Summary of the content on the page No. 16
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. The colors of the sen
Summary of the content on the page No. 17
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. Ribbon Motor Pulley
Summary of the content on the page No. 18
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 Head Block 2 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 remov
Summary of the content on the page No. 19
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. 2-15
Summary of the content on the page No. 20
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. Sensor Case Cap Tab A Media Sensor Har
