JVC GX-N7E User Manual

Measuring
instrument
[=]
|
Test
point
and
Adjustment
Part
|
Description
|
Position
or
direction
of
the
lights
have
been
changed.
Some
procedures
require
a
black
lens
cap.
Oscilloscope | ®
Ce)
[PRE-PRO
BOARD}
10:1
Gray scale
pattern
Hlumination lamp
IRIS
BIAS
LIGHT
Adjustment
VIDEO OUT
Oscilloscope
=)
10:1
R215
(LIGHT
LEVEL)
R216
(LIGHT
BALANCE)
(MOTHER
BOARD]
LIGHT LIGHT
LEVEL BALANCE
*
There
may
be
cases
where
R216
is
not
provided.
*
Certain
adjustments
in
this
section
require
the
iris
setting
to
be
checked.
Be
especially
careful
if
the
1,
Adjust
the
position
and
angie
of
the
lamp
so
that
the
lighting
becomes
uniform
alt
over
the
gray
scale
pattern.
2.
Adjust
the
Iris
so
that
a
waveform
of
0.4V
(optical
black-white
peak)
is
obtained
on
the
oscilloscope,
as
shown
in
Fig.
3-1.
WP
0.4V0B8-wPe
OB
© Close the tris by lens cap
1,
Maintain
the
Y
SET-UP
level
raised
to
about
100
mV
(refer
to
Section
3-4).
2.
Conduct
fine
adjustment
of
R215
(LIGHT
LEVEL)
{to
prevent
the
Y
SET-UP
tevel
from
varying
by
AGC
ON/OFF
Operation.
es
Fig. 3-2
3.
When
the
carrier
is
tilted,
adjust
R216
(LIGHT
BALANCE).
{No. 5550) 19E
lee {V PB)
R218 (V SAW)
[MOTHER BOARD]
No.
item
Measuring
Test
point
and
Adjustment
part
|
Description
instrument
3.
[BLSH
|
Oscilloscope
HBLCOMP.-Y
VRs
|
©
Close
the
Iris
by
lens
cap
COMP.-Y.
H-rate
[PRE-PRO
ae
{H
PB)
;
Adjustment
V-rate
BOARD]
R726
(H
SAW)
1.
Measure
(B8)
at
H-rate,
and
as
shown
in
4:1
V
BL
COMP.-Y
VRs
Fig.
3-3
(a),
adjust
R127
(H_PB)
and
R126
(H SAW) so that the carrier becomes flat.
fee
©
eam
Fig. 3-3 (a)
2 Measure (B8) at V-rate, and as shown in
Fig. 3-3 (b), adjust R219 (V PB) and R218
(V SAW) so that the carrier becomes flat.
A
Fig. 3-3 (b)
3. Measure the VIDEO OUT, and confirm that
AUTO «+ MANUAL switching of the IRIS
SW. (or AGC SWITCH ON/OFF) causes no
Y SET UP level variation. :
If varied, repeat “3-2. BIAS LIGHT Adjust-
ment,”
anwe ioe
4. | Y SET UP
Oscilloscope
fa
VIDEO OUT
R04 (Y SET UP) + °
Close the Iris (AGC OFF)
‘
|
Adjustment
H-rate
(ENC
BOARD]
10:1
1.
As
shown
in
Fig.
3-4,
adjust
RO4
(Y
SET
UP)
so
that
the
set-up
level
becomes
35
mV.
:
35
mv
H-rate
Fig.
3-4
k
L
is
20E
(No.
5550)

JVC GX-N7E Specifications

General

Brand	JVC
Model	GX-N7E
Category	Camcorder
Language	English