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RZ5D Tech Notes

Changing Power Supply Fuses

TN0952

Product: RZ, RZ2, RZ5, RZ5D, RZ6, RZ10, ZB1PS
Version: All
Date Added: 2015-01-22

Issue

RZ Processors and ZB1PS device chassis power supplies have fuses that can be changed by the user. This note provides step by step instructions on changing the fuses. This information can also be found in the Power and Safety guide for these devices, available on the TDT Website User Manuals page.

RZ Fuses

The RZ devices uses two 5 x 20 mm, 1.6 A 250 V rated, slow-blow fuses. Access to the fuses are through a fuse plate on the back panel.

Danger

Only fuses with the required rated current, voltage, and specified type should be used with this device.

To change the power supply fuses:

  1. Turn off the power switch and disconnect the power cord from the power supply.

  2. Using a small flathead screwdriver gently push the clip along the left side of the fuse plate to the right.

  3. When the fuse plate pops free, gently slide the fuse plate and housing out of the power supply.

  4. The housing contains two fuses. Replace the defective/broken fuse(s) with a new 5 x 20 mm, 1.6A 250V rated, slow-blow fuse by gently pushing the end of the fuse into the fuse housing.

  5. Push the fuse housing back into the power supply and press gently until the clip clicks into place.

ZB1PS Fuses

The ZB1PS devices uses two 500 mA 250 V rated time lag fuses. Access to the fuses are through fuse plates on the back panel.

Danger

Only fuses with the required rated current, voltage, and specified type should be used with this device.

To change the power supply fuses:

  1. Turn off the power switch and disconnect the power cord from the power supply.

  2. Using a flathead screwdriver, gently push the fuse plate inward.

  3. Once the fuse plate is pressed inward gently turn the screwdriver counterclockwise until the fuse plate tab is visible.

  4. Depress the fuse plate and it will pop up.

  5. Slide the fuse housing out of the power supply.

  6. Replace the defective/broken fuse with a new 500 mA 250 V rating time lag fuse by gently pushing the end of the fuse into the fuse housing.

  7. Push the fuse housing back into the power supply by pressing the screwdriver inward.

  8. Rotate the fuse plate clockwise until the fuse tab is correctly locked back into its original position.

  9. Repeat for the other fuse, if necessary.

Note

This tech note does not cover the older ZB1 model device caddie, which relies on the PS25F power supply. The PS25F uses a different fuse (printed on the faceplate).