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JVC VM-R200PSN Service Manual page 16

Color video monitor

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7M-R200PSN_—
|
= PAL CIRCUIT ADJUSTMENT
* The adjustment. of the NTSC/SECAM CIRCUIT should
be completed.
1. Input the PAL
COLOUR
BAR PATTERN
(composite)
to video terminal A or B.
3. Connect an oscilloscope to the
pin of 108203.
(Voltage range is AC10 mV).
4. Adjust the TRIMMER
(C8340) so that a, b becomes the
game level.as shown in Fig. 1.
Fig. 1
—> .
Adjust
Fig. 2
= ADJUSTMENT OF CONTRAST (I)
1. Set the Component switch to the "ON" position.
14 (No. 50058)
7. Set the Colour/Mono switch on the front control panel
to the "MONO"
position. At this time, confirm that the
screen is in the gray scale.
# ADJUSTMENT
OF CONTRAST
(II)
1. Finish
the adjustment
using component signal before-
hand.
2. Input color bar pattern to the Video A or B terminal.
3. Set the Colour/Mono switch on the front control panel
to the "MONO"
position. At this time, confirm that the
screen is in gray scale.
4. Connect
an
oscilloscope
between
TP-47B
and
TP-E
(GND) at the CRT socket printed-circuit board.
5. Make an adjustment so that the oscillator indicates 24
Vp-p
using the N Sub Contrast
VR
(R8142)
on the
decoder printed-circuit board.
m USE
THIS
AS A
REFERENCE
WHEN
AD-
JUSTING
THE
CONTRAST
AND
COLOUR
BY MEANS OF A COMPONENT SIGNAL
1. COMPONENT OUTPUT DEVICE
@ Milformat VTR
KR-M800U, KR-M860U, KR-M460U, KR-M260U.
@ BETACAM
VTR
@ Component output of IWS (Image Workstation)
2. INPUT LEVEL
R-Y, B-Y = 0.7 Vp-p
Y =1 Vp-p (including sync 0.286 Vp-p)

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