Toshiba F Series, Service Manual

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3. Cautions on repair
Before repairing a product of the gigabeat F series, take the following cautions:
3.1. Tell the owner that the contents of the HDD may be erased.
Replacing or formatting the HDD will clear the contents of the HDD. In receiving the product from the owner, ask him
or her to make backup copies of important data.
3.2. Remove the AC adaptor and set the BATTERY switch to OFF.
Before disassembly, be sure to remove the AC adaptor and set the BATTERY switch to "OFF."
The gigabeat F series is such that its LCD and almost all ICs are powered even if the unit is turned off, if it is powered by
the AC adaptor or battery. Before conducting a repair, therefore, the AC adaptor and battery must be removed.
Setting the BATTERY switch to "OFF" will stop the power supply from the battery, thus putting the unit into the same
state as when the battery is removed.