Toshiba B-852-R manual Main PC Board 3x6 Screw Main PCB Support Frame SMW-3x6

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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

MAIN PCB Support Frame

SMW-3x6

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 printer system setting according to the printout of the parameter settings.

(3)Perform a media sensor adjustment.

(4)Perform a test print to print to confirm that the printer works properly.

2-5

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Contents Series Table of Contents Unpacking ProcedureChecks Opening and Removing the Covers Major Unit Replacement Lubrication Replacing the Main PC Board Remove the two SMW-4x8 screws, SMW-3x6 screw and B-3x6 screw Main PC Board 3x6 Screw Main PCB Support Frame SMW-3x6 Replacing the Panel PC Board Major Unit Replacement Replacing the Stepping Motor Pulley Motor Gear Stepping Motor Replacing the Head Up Sensor Replacing the Slit Sensor Rewind/Feed Replacing the Ribbon Motor Rewind/Feed Major Unit Replacement Replacing the Platen Platen Shaft Holder Feed Gap Sensor TR and Black Mark Sensor Upper Side Replacing the Media SensorFeed Gap Sensor LED and Black Mark Sensor Lower Side Pass the media sensor harness between the harness guides Replacing the Print Head Replacing the PS Unit and Reactor Disconnect the PSU harness from CN4 on the PS unit Inlet Periodic Maintenance Procedure Periodic Maintenance Procedure Replacement Periodic Maintenance Procedure Troubleshooting Toshiba TEC