Toshiba B-852-R manual Replacing the Print Head

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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. Doing so may cause a print failure, such as ribbon wrinkle, blurred print, etc.

Head Block Frame

1)Open the top cover and raise the print head block.

2)Push the print head ass’y to the right side, lift it in the direction of the arrow, and release it from the print head fixing pin.

3)Disconnect the print head harnesses from the three connectors of the print head.

Hole

Print Head Ass’y

Print Head Harness

Spring

Print Head Fixing Pin

Print Head Harness

5)Replace the print head with a new one, then reassemble in the reverse order of removal.

NOTES: 1. Install the print head in position by fitting its holes into the spring and print head fixing pin.

2.After replacing the print head, refer to Section 6.8 to perform a Maintenance Counter Clear.

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Contents Series Table of Contents Unpacking ProcedureChecks Opening and Removing the Covers Major Unit ReplacementLubrication 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