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JVC GX-N5E Servicehandbuch Seite 124

Modified one

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ITEM
SYNC
3 | VERTICAL
AMPLITUDE
4 | PICTURE
LOCATION
2 | HORIZONTAL
5 | BRIGHTNESS
6 | CONTRAST
PATTERN OR
SUBJECT
Any gray scale
pattern, mono-
scope pattern, or
resolution pat-
tern is OK.
Monoscope pat-
tern or cross-
hatch pattern
Gray scale pat-
tern
GX-N5E
ADJUSTMENT
PARTS
ADJUSTING METHOD
R855 H. HOLD
1) Set R855
H. HOLD
VR fully-counterclockwise
(in the
VR
high H. freq. direction).
Fig. 4-2 (A)
2) Return R855
H. HOLD
VR clockwise.
Stop turning it
when synchronization is adjusted and the bend appear-
ing on the screen upper portion
a_
is corrected.
Fig. 4-2 (A) — (B) — (C)
(Note) Adjustment
is facilitated
when
conducted
while
shooting a linear pattern such as a color bar pattern.
—____
@
=>
———
(A) No Good
(B) No Good
(C) Good
Fig. 4-2
Adjustment of H. HOLD
(using Color bar pattern)
R837 V. HEIGHT
VR
Centering magnet
of the Deflection
Yoke
R860 BRIGHT
VR
R801 CON-
TRAST VR
Adjust R837 V. HEIGHT VR so that the amplitude of the
pattern is normal.
Adjust the CENTERING
MAGNET
so that the center of
the pattern coincides with the center of the frame of the
EVF
screen.
Turn the R860
BRIGHT VR while observing the EVF
screen and stop turning it just before the pattern's black
portion becomes invisible.
(Note) Shoot the gray scale pattern so that it fills the whole
area of the frame.
While monitoring the EVF screen turn R801 CONTRAST
VR and stop shortly before contrast fails on the white
area of the pattern for better viewability.
(Note) Rather lighter contrast is easier on the eyes.
7 | FOCUS
8 | HIGH VOL-
TAGE CHECK
Gray scale pat-
tern or monos-
cope pattern
R862 FOCUS
VR
While monitoring the EVF screen turn R862 FOCUS VR
as far right as possible, as long as the picture is in good
focus.
|
Connect the high voltage meter of CRT anode and make
sure that the meter indicator is within 3.5 + O.5kV.
Ds
9 | FINAL CHECK
Shoot patterns or other subjects and operate zoom, focus, iris control switch, VTR switch, etc..
Thus make sure that brightness, contrast, focus, size and location of the picture, iris indication,
VTR start/stop indication are all proper. Operate also the FILTER switch and WHITE BALANCE but-
tons and make sure that white balance indication (LED indication on the CRT mask area) is properly
achieved.. Further reduce the camera supply voltage (12V input) and make sure that battery alarm
indication on the EVF is properly achieved when thej voltage is below ca. 10.8V.
(No. 5391B) 37E

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