HP 20-Feb - Manual (Page 169)

Chapter 5 Removing and Replacing the Power Supply 167
Ch
apter 5
Removing and Replacing the Power Supply
A failing power supply on a 2/20 series library disables the library. A failing
power supply on upper library levels results in a partial availability state.
Note Power cycling the library at this point will result in a hard error. If
you want to continue using the library in its partially available
state, do not power cycle.
When the library is in a partial availability state, it is still functional, but is not
in optimum configuration. When this occurs, the front panel will display Partly
Available , and the illuminated LED beneath the front panel display will be solid
amber until the condition is resolved (see Table 26 on page 139).
Removing the Power Supply
1. Power off the library.
2. Disconnect the power cord from the back of the power supply.
3. Loosen the thumbscrews at the top and bottom of the power supply. If the
thumbscrews are too tight to loosen by hand, loosen them with a
screwdriver.
4. Remove the stop bracket (if applicable). See Figure 56 on page 171.
5. Remove the power supply with one hand by pulling outward (see Figure
56 on page 171). Support the bottom of the power supply to avoid
dropping the module.