ViewSonic VG750 Service Manual - Page 30

Function, Alignment, Procedure

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6-5 Function Test and Alignment Procedure 6-5.1 All Mode Reset Input signal to VG700, turn off the power of VG700. Press "A ", "y" and "Power on" buttons on the select knob simultaneouslyfor 3-5 seconds, release "Power on" button first, then else buttons. The screen will show "All Mode Reset". This action will allow you to erase all end-user's settings and restore the factory defaults. 6-5.2 Auto Image Adjust Please select and enter "Auto Image Adjust"function on OSD "E" Main Menu or press button directly. The "Auto Image Adjust" function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually %ea 6-5.3 Fine Tune (D Test Signal: 1280 *1024@75Hz Test Pattern: Line Moire Pattern • Check and see if the image has noise andfocus is well performed. • If not, readjust by the following steps: a.) Select and enter "Manual Image Adjust"function on OSD Main Menu. b.) Then, select and enter "Fine Tune"function to adjust the image to eliminate visual noise. 6-5.4 Boundary Test Signal: 1280*1024@75Hz Test Pattern: Horizontal & Vertical Line Thickness Pattern • Check and see if the image boundary is within the screen frame. • If not, readjust by the following steps: a.) Select and enter "Manual Image Adjust"function on OSD Main Menu. b.) Then, select and enter "Horizontal/Vertical Position" or "ScalingIFit All"function to adjust the video Boundary to be full scanned and within screen frame. 6-5 ViewSonic Corporation CONFIDENTIAL - DO NOT COPY

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6-5
Function
Test
and
Alignment
Procedure
6-5.1
All
Mode
Reset
Input
signal
to
VG700,
turn
off
the
power
of
VG700.
Press
"A
",
"y"
and
"Power
on"
buttons
on
the
select
knob
simultaneously
for
3-5
seconds,
release
"Power
on"
button
first,
then
else
buttons.
The
screen
will
show
"All
Mode
Reset".
This
action
will
allow
you
to
erase
all
end
-user's
settings
and
restore
the
factory
defaults.
6-5.2
Auto
Image
Adjust
Please
select
and
enter
"Auto
Image
Adjust"
function
on
OSD
Main
Menu
or
press
"E"
button
directly.
The
"Auto
Image
Adjust"
function
is
aimed
to
offer
a
better
screen
quality
by
built-in
ASIC.
For
optimum
screen
quality,
the
user
has
to
adjust
each
function
manually
%e
a
6-5.3
Fine
Tune
(D
Test
Signal:
1280
*1024@75Hz
Test
Pattern:
Line
Moire
Pattern
•
Check
and
see
if
the
image
has
noise
and
focus
is
well
performed.
•
If
not,
readjust
by
the
following
steps:
a.)
Select
and
enter
"Manual
Image
Adjust"
function
on
OSD
Main
Menu.
b.)
Then,
select
and
enter
"Fine
Tune"
function
to
adjust
the
image
to
eliminate
visual
noise.
6-5.4
Boundary
Test
Signal:
1280*1024@75Hz
Test
Pattern:
Horizontal
&
Vertical
Line
Thickness
Pattern
•
Check
and
see
if
the
image
boundary
is
within
the
screen
frame.
•
If
not,
readjust
by
the
following
steps:
a.)
Select
and
enter
"Manual
Image
Adjust"
function
on
OSD
Main
Menu.
b.)
Then,
select
and
enter
"Horizontal/Vertical
Position"
or
"ScalingIFit
All"
function
to
adjust
the
video
Boundary
to
be
full
scanned
and
within
screen
frame.
6-5
ViewSonic
Corporation
CONFIDENTIAL
-
DO
NOT
COPY