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GX-N5E
Measuri
Item
ep
ies
Test point and Adjustment part
Description
|
=
./DC
Oscillocope
VIDEO OUT
R311 (OFF SET)
Adjustment procedure with oscilloscope
BALANCE
Adjustment
( H-rate )
10:1
1. Close the iris.
2. Adjust
R311
(OFFSET)
to
minimize
the
noise component of the waveform.
¥
i
=>
To minimum
Fig. 3-12
(a)
R311
Vectorscope
EEE
Adjustment procedure with vectorscope
1. Close the iris.
2. Adjust R311 (OFFSET) to minimze the blue
portion of the carrier on the vectorscope.
Fig. 3-12
(b)
.|R/B GAIN
| Oscillocope
VIDEO OUT
R371
(R GAIN)
°
Set the iris for a value
of O.7Vpp-wp
at
Adjustment
R363 (B GAIN)
VIDEO OUT.
{ H-rate )
a
©
Set R420 (R DC BAL.) to that the voltage at
10:1
g.
the center position becomes
3.5V.
=
©
Set R426 (B DC BAL.) so that the voltage at
Gray scale
the
center
position
becomes
3.65V.
pattern
1. Measure
VIDEO
OUT
and adjust R371
(R
GAIN) and R363
(B GAIN) to minimize the
carrier at the center
of the gray scale, as
shown in Fig. 3-13.
thy il ail
hy. wt
we
fe ~
Ten
ah
fi epee
port
Fig. 3-13
2. Open the iris a little and check G. SET UP. If
carrier is present, perform fine adjustment of
R381
(G SET UP).
(No. 5391B) 25E
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