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Sony Trinitron PVM-8041Q Service Manual page 29

Color
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PVM-8041Q/8044Q
2
.
(1)
(
2
)
(3)
PAL
COLOR ADJUSTMENT
(RVl
10)
Receive
PAL
color bar
signal
(75%
color
bar).
Connect
an
oscilloscope
to
IC124
pin-(©
(B-OUT).
Adjust
RVl
10
(PAL-COL)
so
that
waveform
peaks should have
the
same
level
(most
flat).
(Adjust
so
that
the
first
and
the 4th
B-OUT)
peaks
should
have
the
same
level.)
3.
PAL-COLOR-(R-
Y)
ADJUSTMENT
(RV
105)
(1)
Connect
an
oscilloscope
to
IC124
pin-®
(R-OUT).
(2)
AdjustRV105 (PAL-COL-(R-Y))
so
that
waveform
peaks should
have
the
same
level
(most
flat).
(Adjust
for
B=D.
[less
than
20m
V]
Also
level
difference
between
B
and
C
should
be
less
than
60mV.)
SUB-SHARP ADJUSTMENT
(RV205)
CHROMA
H PULSE
POSITION
ADJUSTMENT
(RV101,RV102)
(1)
Receive
the
SECAM
color bar
signal.
(The
left
edge
of
the screen
should
not
be
colored.)
(2)
Set
to the
under-scan
mode.
(3)
Adjust
RVlOl (PLUSE-WIDTH)
until
the point
immediately
before
the
color
on
the
left
edge
of
the
screen disappears.
(4)
Relea.se the
under-scan
mode.
(5)
Set
the
HV DELAY
mode.
(6)
Adjust
RV
1
02
(PULSE-
POSI)
untill
the point
immediately
before
the
rising
color
of
the
image
after
back porch
diappears.
Note
:
IfimagephaseadjustmentorHVDELAYamountadjustment
during
HV DELAY
is
performed
after
completing
the
adjustment
in this
.section,
re-adjustments
will
be
required.
Therefore,
performed
this
adjustmentafterthe
two mentioned
have been performed.
(1
)
Receive
a
sweep
signal (or multi-burst).
*
Bandwidth
should be
more
than
1
OMHz
(flat).
»
Composite
sync should be
included.
Turn
burst
off.
(2)
Connect
an oscilloscope
to
1C124
pin-®
(G-OUT).
(3)
Adjust
RV205 (SUB-SHARP)
as
shown.
0.5MHz
eMHz
Example
of
sweep
signal
output
waveform
[specification]
6MHz/0.5MHz=0±0.5dB
29

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