PREPARATIONS
36
AC Operation
The GY-HD250/GY-HD251 is operable with AC power supply
or battery pack.
Use the AC adapter as the AC power supply.
1.After making sure that the power switches of the GY-
HD250/GY-HD251 and of the AC adapter are set to OFF,
connect the DC cable to the DC OUTPUT connector of
the AC adapter and the DC INPUT connector of the GY-
HD250/GY-HD251 as shown in the illustration.
• To lessen the amount of unnecessary radio waves
emitted, attach a provided Clamp filter near both ends
of the DC cable as shown in the diagram.
2.Press the POWER switch of the GY-HD250/GY-HD251 to
ON. Power is supplied to the VTR section and the cam-
era.
CAUTION
• Do not remove or connect the DC cable whil e recording
is being performed.
• Do not use any power source with large fluctuations in
the power source voltage, power sources generating
noise, such as ripples or power sources with lower volt-
age.

Charging the Built-in Battery

The built-in, rechargeable backup battery retains the date
and time and the time code data.
The built-in battery is constantly being charge whenever the
GY-HD250/GY-HD251 is connected to a power supply, but it
gradually discharges while the GY-HD250/GY-HD251 is dis-
connected from a power supply. The battery will be fully dis-
charged when the GY-HD250/GY-HD251 is not used for
about three months, in which case the set date and time and
time code data are reset.
In this case, recharge the built-in battery and then set the
date and time and time code data again.
However, it is possible to use the GY-HD250/GY-HD251
even if the built-in battery is discharged but the date and time
and time code data cannot be recorded.

How to charge the built-in battery

1.Connect the AC adapter to the GY-HD250/GY-HD251
and an AC outlet or mount a charged battery on the GY-
HD250/GY-HD251.
2.Set the POWER switch on the GY-HD250/GY-HD251 to
“ON” or “OFF” (charging takes places with the POWER
switch set to either of the positions).
3.Leave the equipment in this condition for about 4 hours.
• The built-in battery will remain charged for about 3
months after being charged for about 4 hours.
IEEE 1394
CH2-AUDIO OUT-CH1 VIDEO
DC INPUT
AC adapter
DC OUTPUT
DC cable
Clamp filter
Clamp filter
37
Battery Operation
The attachable battery varies depending on location.
Recommended batteries
U model: Dionic 90 (Anton Bauer)
E model: Endura-7 (IDX)
CAUTION
Use only the recommended batteries.
If a heavy battery is used, the battery may fall out depend-
ing on the way the HD camera recorder is used.

GY-HD250U

Use an Anton Bauer battery.

Attaching the Battery

1.Align the battery guide pins (three places) with the bat-
tery adapter guide holes and insert straight. Battery will
not be properly attached if guide pins are not straight.
2.Slide the battery towards the Cassette cover side panel
until it clicks.
• The battery is attached.

Removing the Battery

Slide the battery towards you (LCD screen side panel) while
holding down the release lever, and pull away from the
device to remove the battery.

GY-HD251E

Use an IDX (Endura) battery.

Attaching the Battery

1.Face the battery terminals down and align the battery V-
mount with the battery adapter V-mount attachment.
2.Slide the battery down until it clicks and locks.
• The battery is attached.

Removing the Battery

Slide the battery up while holding down the lock release but-
ton to remove the battery.
Release lever
Cassette cover
side panel
Guide
holes (×3)
LCD screen
side panel
Guide pins
Battery pack
(trim pack)
Release lever
Battery
V-mount
attachment V-mount
Release button
Battery