VCOM ADJUSTMENT
Purpose:
To set the optimum LCD common voltage.
Symptom of Misadjustment:
The picture will be flickering.
Test Pattern Signal:
-
70 % Red Horizontal Signal: "2 Red 70 %" in "2 Horizontal" of "3
Phase"
-
70 % Green Horizontal Signal: "3 Green 70 %" in "2 Horizontal"
of "3 Phase"
-
70 % Blue Horizontal Signal: "4 Blue 70 %" in "2 Horizontal" of "3
Phase"
SET UP:
1. Connect the PC(2) to the PC Input Terminal with the RGB
Cable.
Note:
PC output should be 720p resolution.
A Desk Top PC with a video graphics card compatible
with 1080p resolution must be used.
2. Set to PC mode by pressing TV/VIDEO key on the remote.
PROCEDURES:
1. Supply 70% Red Horizontal signal.
2. Select "VCOM RED ADJUSTMENT" in menu.
3. Adjust "VCOM RED ADJUSTMENT" by pressing 4(
),
6(
) key on the 10-key keyboard so that there are no
flicker on the whole screen.
4. Supply 70% Green Horizontal signal.
5. Then, select "VCOM GREEN ADJUSTMENT" in software
menu by 2( ) or 8( ) key on the 10-key keyboard.
6. Adjust "VCOM GREEN ADJUSTMENT" by pressing 4(
),
6(
) key on the 10-key keyboard so that the flicker on the
whole screen becomes minimum and uniformity.
7. Supply 70% Blue Horizontal signal.
8. Then, select "VCOM BLUE ADJUSTMENT" in software
menu by 2( ) or 8( ) key on the 10-key keyboard.
9. Adjust "VCOM BLUE ADJUSTMENT" by pressing 4(
),
6(
) key on the 10-key keyboard so that the flicker on the
whole screen becomes minimum and uniformity.
10. End the software.
11. Turn off the unit power.
TP
PC(2), Test Pattern Signal
or PC with video graphics
card
Refer to Description below
SPECIFICATION
EQUIPMENT
ADJ.
Vcom R
Adjust
Vcom G
Adjust
Vcom B
Adjust
INPUT
(PC Input Terminal)
70 % Red Horizontal Signal
(PC Input Terminal)
70 % Green Horizontal Signal
(PC Input Terminal)
70 % Blue Horizontal Signal
Note:
This method is for use with PC which has a 720p video
graphics card to output the Test Pattern Signal.
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
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