Fostex PD-4 Owner's Manual page 36

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PD-4 DIGITAL AUDIO RECORDER
Condensation
If the PD-4 is moved from a warm environment to a cold environment, condensation may build
up on the tape transport. To prevent possible damage to the transport and the DAT cassette, a
dew sensor automatically stops all transport operation.
When the dew sensor is active, the DEW indicator (59) will flash on the display.
When the condensation has dried, the DEW indicator will no longer be flashing on the display
and the tape transport will resume operation.
IMPORTANT! All keys other than the EJECT/UNLOAD key are inactive while the dew sensor
is active. Wait until the DEW indicator is no longer illuminated before attempting any operations.
Memory back-up battery
In addition to the main battery, the PD-4 contains a memory back-up battery. This battery
protects the memory data while the main battery is being replaced. The back-up battery
automatically charges when the PD-4 is powered up.
During periods of non use, the memory data will be maintained for two months, if the unit is
stored at room temperature. When you turn the power on after the back-up battery has
discharged, the memory will reset to the factory default settings.
To maintain the memory data, power up the PD-4 for 24 hours at least once every two months. A
fully discharged memory back-up battery requires 24 to 48 hours of charging.
Note for replacing the ROM
When you replace the ROM to update the system version, please note the following:
Before replacing the ROM, be sure to remove the internal battery (NP-IB) and unplug the
external power source (AC adaptor AD-15) from the AC outlet. If you replace the ROM without
removing the battery or disconnecting the AC power, the ROM may be damaged, or the PD-4
may malfunction.
IMPORTANT! You should have the ROM replaced at an authorized FOSTEX service centre.
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Precautions