Toshiba B-450-R manual Detach the PS Unit from the Bottom Cover

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2. MAJOUR UNIT REPLACEMENT

EO18-33021

2.3. REPLACING THE PS UNIT

6)Detach the PS Unit from the Bottom Cover.

Bottom Cover

PS Unit

7)Replace the PS Unit as an assembly, then, reassemble in the reverse order of steps 1) to 6).

To replace the Fan Motor, Power Harness, Inlet Ass’y, PSU Cover, etc. individually, follow the steps 8) to 12) provided below.

8)Remove the SMW-3x6, SMW-3x8, and D-3x5 screws to detach the PSU Cover from the PS Unit.

SMW-3x6 Screw

PSU Cover

D-3x5 Screw

SMW-3x8 Screw

9)Disconnect the Power Harness from CN4 on the PS Unit. Remove the SMW-4x8 screw to release the Ground Wire of the Inlet Ass’y.

Power Harness

Ground Wire

SMW-4x8 Screw

CN4

2- 9

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Contents Series Table of Contents Procedure ChecksMajor Unit Replacement Replacing the CPU PC BoardCN9 CN5 CN2 CN1 Release the two Hooks securing the Printer Unit Remove the SMW-3x6 screw, N-3 Nut and Ground Plate Replacing the Motor Ribbon MotorStepping Motor Replacing the PS Unit Hook PS Unit Printer Block Bottom Cover Detach the PS Unit from the Bottom Cover Power Switch Inlet Ass’y Replacing the Print Head Replacing the Media Sensor Replacing the Sensor PCB TRSensor PCB TR Connector Sensor Holder Harness Rivet Replacing the Sensor PCB LED Release the two Hooks securing the Printer Unit Printer Unit Harness Rivet Sensor PCB LED Troubleshooting