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PVM-1 440QM/1 442QM/1
444QM
SECTION
5
CIRCUIT
ADJUSTMENTS
5-1.
A
BOARD ADJUSTMENTS
-A
BOARD (COMPONENT
SIDE)
-
HORIZONTAL
OSCILLATION
FREQUENCY
ADJUSTMENT
(RV501)
1.
Receive
a
monoscope
signal.
2.
Connect
pin
©
of
IC501
to
ground
with
100
v
F/
16
V
electrolytic
capacitor.
3.
Adjust
RV501
so
that
the screen
streaming
stops.
I
to
:
low
to
:
suitable
f
o
:
high
white frame
White frame
becomes
just
to
the
right
side.
6.
V.
BLK
Adjustment (RV514)
(1)
Adjust
RV514
(V.
BLK)
so
that the
upper
side
white
frame
of
monoscope
signal
is
not blanked.
H
V BLK
ADJUSTMENTS
(RV510. RV512, RV513,
RV514)
1.
Receive
a
monoscope
signal.
2.
Set
U/S
(Under Scan)
switch
to
Under mode.
3.
•
CONTRAST
Minimum
•
BRIGHTNESS
Maximum
4.
Adjust
RV510
(U.
H.
SIZE)
so
that the
white
frame
of
monoscope
signal
becomes
visible.
5.
Adjust
RV512
(Video Phase)
so
that the
white
frame
of
monoscope
signal
becomes
to
the
right
side just
on
the screen.
V.
BLK
Make
not to
blank the
upper
side
white frame
of
monoscope
signal.
-
18
-
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