JVC GX-N7E - Page 29

Description
ef
© Set the iris so that the Y level of Yellow
becomes 0.7V under VIDEO OUT (Setting
is facilitated by preventing the color from
appearing through turning R43).
1. Adjust R43 (CHROMA LIMITER) to a
Point just before the yellow carrier becomes
compressed, as shown in Fig. 3-22.
~ , Fig, 3-22
No. Item Measuring Test point and Adjustment part
instrument
22.| CHROMA | Oscilloscope |VIDEOOUT R43 (CHROMA
LIMITER H-rate LIMITER)
Adjustment 10:1 [AGC BOARD]
Color bar
pattern
(CC-2T)
23.
OUTDOOR]
Onaiosope
VIDEO
OUT
R242
(OUTDOOR
R.B
GAIN
Cx)
B
SET)
Adjustment
10:1
R244
(OUTDOOR
R SET)
{MOTHER BOARD]
Gray scale OUTDOOR _fA Om
pattern e
Vectorscope
Gray scale
pattern
VIDEO OUT
Adjustment procedure with oscilloscope
© Set the IRIS CONTROL SWITCH to AUTO
1. Mount a 80B C.C. filter on the lens and
set the AUTO WHITE SWITCH to “OUT-
DOOR.”
2. Alternately adjust R242 (OUTDOOR B
SET) and R244 (OUTDOOR R SET) to
minimize the carrier of the waveform.
Adjustment procedure with vectorscope
© Set the IRIS CONTROL SWITCH to AUTO
1. Mount a 80B C.C. filter on the lens and set
the AUTO WHITE SWITCH to “OUT-
DOOR.”
. Alternately adjust R242 (OUTDOOR 8
SET) and R244 (OUTDOOR R SET) so
that the carrier displayed on the vectorscope
is positioned at center and minimized.
ey a
\
~~ Fig. 3-23 (b} a ee
(No. 5550) 35E
nN
Measuring . : Zo ag
item inrtrament Test point and Adjustment part Description
.| AUTO Oscilloscope | VIDEO OUT RO1 (A/W B. Adjustment procedure with oscilloscope
WHITE H-rate PRESET)
BALANCE 10:1 ) RO2 (A/W R. © Set the FRIS CONTROL SWITCH to AUTO
Adjustment PRESET)
ROS (A/W B. GAIN) | 1. Set the AUTO WHITE SWITCH to “AUTO”
RO6 (A/W R. GAIN) and preset ROS (A/W B. GAIN) and R06
Gray
scale
{B.
SET
BOARD]
(A/W
R.
GAIN)
at
the
mechanicat
centers.
pattern 2. As shown in Fig. 3-24 (b), adjust ROT (A/W
B. PRESET) and RO2 (A/W R. PRESET}
AUTO WHITE SENSOR Fig. 3-24 (a)
}-~------ soo oan +
Vectorscope | VIDEO OUT
Gray scale
pattern
AWB. PRESET
A/W R. PRESET
Fig. 3-24 (c)
so that the carrier is minimized.
3. Next, mount W4 C.C. filter on lens and
mount No. 80B C.C. filters on both the
lens and the A/W sensor {refer to Fig. 3-24
{a)), and as shown in Fig. 3-24 (b), adjust
ROS (A/W B. GAIN) and ROG (A/W R.
GAIN) so that the carrier is minimized,
q
—W
Fig. 3-24 (b) —
4. Repeat above steps 2 and 3, and adjust so
that carrier difference between the two is
eliminated.
© Set the IRIS CONTROL SWITCH to AUTO
1. Set the AUTO WHITE SWITCH to “AUTO”
and preset ROS (A/W B.GAIN) and R06
(A/W R. GAIN) at the mechanical centers.
2. As shown in Fig. 3-24 (c), adjust RO1 (A/W
B. PRESET) and RO2 (A/W R. PRESET) so
that the carrier is positioned at the center.
3. Next, mount W4 C.C. filter on lens and
mount No. 80B C.C. filters on both the
lens and the A/W sensor (refer to Fig. 3-24
(a)), and as shown in Fig. 3-24 (c), adjust
ROS (A/W B. GAIN) and ROG (A/W R.
GAIN) so that the carrier is positioned at
the center.
4. Repeat above steps 2 and 3, and adjust so
that carrier transfer between the two is
eliminated.
36E (No. 5550)