LG 42PW350 - Observing (Capturing) the Y-Drive Signal for Set Up Adjustment; Capturing Y-Drive Waveforms

Observing (Capturing) the Y-Drive Signal for Set Up Adjustment
Fi 1
Set must be in “WHITE WASH”
All other DC Voltage adjustments should have already been made.
Adjustment
Area
Fi
g
1
:
As an example of how to lock in to the Y-Drive Waveform. Fig
1 shows the signal locked in at 2ms per/div.
Note the 2 blanking sections.
The area for ad
j
ustment is
p
ointed out within the Waveform
FIG1
2mS
Area to
expand
Blanking Blanking
jp
Fig 2:
At 200uSec per/division, the area of the waveform to
use for SET-UP or SET-DN is now becoming clear.
Now
only one
blanking
signal is
present
FIG2
200uS
Area to
ex
p
and
Adjustment
Area
Fig 3:
At 100us per/div the area for adjustment of SET-UP or SET-DN
i i t i It i tli d ithi th W f
Now
only
one
blanking
signal
is
present
.
FIG3
p
Expanded
from above
i
s now eas
i
er
t
o recogn
i
ze.
It
i
s ou
tli
ne
d
w
ithi
n
th
e
W
ave
f
orm.
Remember, this is the 1
st
large signal to the right of blanking.
TIP: If
y
ou ex
p
and to 40uSec
p
er/division, the
Area for Set
-
Up
100uS
155V
p/p
Expanded from above
yp p
adjustment for:
SET-UP can be made using VR601 and the
SET-DN can be made using VR401.
It will make this adjustment easier if you use the
“
Expanded
”
mode of your scope
Area
for
Set
Up
adjustment
Blanking
June 2011 42PW350 Plasma
88
Expanded
mode
of
your
scope
.
195 uSec
Area for Set-Dn
adjustment