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9)
xye320P
_XV-320PO©
i
te
a
ee
ae
mer
es
mR
EE
ee
emma
mg
mete
re
initialization
2 | NTSC horizontal | e
display
positioning:
Horizontal
display position
control on LCD
panel
AGC
adjustment:
R1539
Sub-brightness
adjustment:
ADJINi
@
NTSC tint
adjustment:
ADJIN1
yee
Microprocessor
| e
First of all, be sure to initialize the
microprocessor.
By doing so, all the adjustment-
related data are initialized and the
unit ts ready to adjust.
% This initialization should be made
only when
!C2004
has
been
replaced for repair purpose.
Receive
the
NTSC
monoscope
pattern signal.
Receive the NTSC half colour bar
signal.
Connect the oscilloscope between
pin (1) of TP2 and GND.
luminance signal muted.
18
@ Hold down the switch $2014 for
1
second
or
Jonger,
and
"ADJ. IN"
appears
on
the
screen.
® Hold down the switch $2006 for
1 second or longer, and "SET2"
first
and
then
"ADJ.OUT"
appear on the screen.
® If the horizontal position is out
of center, turn the horizontal
display position control on the
LCD panel.
Horizontal!
display position
control
SETH
Ee
T:
LCD pane!
@ Adjust R1539 so that the signal
level be 0.9 Vp-p
+20 mVp-p
(including the sync). .
Using the DAC {+/-)
control,
adjust the signal's back porch
LANE
wy
levelto DC -4.3
+0.05V.
Using the DAC (+/-)
control,
adjust the waveform so that the
portions A and B be at the same
level. See the figure below.
A
XV-320P
XV-320P®©
Adjusting point
Adjusting conditions
Adjusting procedure
Colour
|
saturation:
ADJINI
@
Contrast
adjustment:
ADJINI
R sub-bias
adjusiment:
Ri i BAS
| B sub-bias
adjustment:
R1507
R drive
adjustment:
ADJIN2 RDR
B drive
adjustment:
ADJ IN2 BDR
Sub-bias
adjustment:
ADJIN2 SBS
"
Receive the NTSC
half colour bar
ett
Connect the ascilloscope between
pin (8) of TP2 and GND.
Receive the NTSC half colour bar
signal.
Connect the oscilloscope between
pin (2) of TP32 and GND.
Receive the NTSC
half cclour bar
signai.
a
eee
ee
Recerve
ite NTSC haiti coieut
bar
signal.
Connect the oscilloscope between
pin (3) of TP3 and GND.
Receive the NTSC
half peeuy bar
signal.
Connect the oscilloscope between
pin (1) of TP3 and GND.
Receive the NTSC half colour bar
signal.
Connect the 'oscilloscope between
pin (3) of TP3 and GND.
Receive the NTSC half colour bar
signal.
Connect the oscilloscope between
pin (2) of TP4 and GND.
19
® Using the DAC (+/-) control,
adjust the waveform as shown
below.
Make sure that the 75%
white
level
and
the
arrow-
marked level are the same.
Using the DAC (+/-)
control,
adjust the signal's 100% white
level to DC 0.20.05 V.
Using the DAC
agjusi
ihe
siGi
:
a
Poneto
te
PA
ee
a
Usiig tne DAC (+/-—)
contrat,
adjust the signal's back porch
level to DC -4.3+0.05V.
Using the DAC (+/-) control,
|
adjust the signal's 100% white |
level to DC 0.2+0.05V.
Using the DAC (+/-) control,
adjust the signal's 100% white
level to DC 0.2 40.05 V..
Get the
waveform
inverted.
|
With the DAC
(+/-—) control,
adjust the voltage difference
between the white portion of :
the inverted wave
and that of :
the
non-inverted
wave
to
1.35
+ 0.05 Vp-p.
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