Bio-Rad PowerPac™ Universal Power Supply - Manual (Page 29)

5.3 Replacing a Fuse
If the power supply is plugged into a working outlet, with the power switch in the
ON position and there is no display, lights or fan operation, a fuse might need to be
replaced.
1. Disconnect the power cord from the electrical outlet.
2. Use a fingernail or a flat blade screwdriver to gently press the tabs on the side
of the fuse holder toward each other. This will release the fuse holder and the
fuses. See Figure 7. Inspect the fuses visually to determine if one or both of the
fuses are blown.
3. Remove the blown fuse from the fuse holder. Replace it with a 6.3A, 250VAC
5mm X 20mm fuse (Bio-Rad part number 900-7288).
4. Re-insert the fuse holder into its position. Press the fuse holder gently until it
snaps into place on both sides.
The unit is now ready for use.
Fig. 7. Rear view Showing Fuse Drawer with Notches.
Note: Repeated blowing of the fuse indicates a hardware failure. Contact Bio-Rad
Technical Support.
5.4 Expediting Technical Support
Make sure the following information is readily available before contacting Bio-Rad.
Product model no: Located in the sticker on the bottom of the unit
(example: PowerPac Universal Power Supply).
Serial number: Located in the sticker on the bottom of the unit
Software version: The PowerPac Universal displays the software version
momentarily after switching the power ON (example: Firmware 1.20).
State clearly the error code, error message or anomaly, and the conditions that
originated the problem, including run parameters (V, A, and W) as well as the
electrophoresis cell and buffer system.
NOTCHES
FUSE
DRAWER
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