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5
6.2 DVD ADJUSTMENT
1) Precautions
This product uses 5 V and 3.3 V as standard voltages.
The electrical potential that is the reference for signals,
is not GND, but VREF
.
During product
mistakenly taken as GND, and a grounding contact is
made, not only would it be
accurate
would
r
strong impact on the pick up. The following precaution-
ary measures should be strictly adhered to, in order to
The reference voltage and
when
the
When an
is being used special care should
be taken to
sure that the reference voltage is not
to the
of ch1 (on the minus side),
to GND. Further, since the body frame of most mea-
surement devices have the same electrical potential as
the minus side of the probe, the body frame of the mea-
surement device should be set to floating ground.
5
6
2.2 V) and VHALF
if the reference voltage is
to measure the
also the
in the
of a
should not be confused
a
device.
AVH-P7800DVD/UC
6
7
If the r
voltage is
take,
the regulator OFF i
F.
• Remove the filters and wires used for measurements
• After the power supply is turned on,
adjustment and measurement are promptly
done.
• Whenever the product is in the test mode, the software
will not take any protective action. For this reason,
special care
be
mechanical or
• Whenever the EJECT key is pressed to eject the disk,
no other keys, other than the
pressed until the disk eject action has
ed.
• Press the EJECT key only after the disk has stopped
completely.
• If the product hangs up turn the power OFF immedi-
y.
•
didoes may be damaged, if the volume switch for
the laser power adjustment of the pick up unit, is turned.
Attention)
• Test mode starting procedure
Reset start while pressing the SOURCE
and SETTING keys together.
• Test mode stopping procedure
Reset or ACC OFF-ON.
7
8
to GND by mis-
, or turn the
.
ON the
to m
sure
no
could be applied to the
key, should be
complet-
177
8
A
B
C
D
E
F
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