Panasonic PT-50LCZ70 Service Manual page 52

PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7
VCOM ADJUSTMENT
Purpose:
To set the optimum LCD common voltage.
Symptom of Misadjustment:
The picture will be flickering.
TP ADJ.
Vcom R
Adjust
Vcom G
Adjust
Vcom B
Adjust
EQUIPMENT
PC(2), Test Pattern Signal
or PC with video graphics
card
This method is for use with PC which has a 1080p video
graphics card to output the Test Pattern Signal.
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 1080p 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.
INPUT
(PC Input Terminal)
70 % Red Horizontal Signal
(PC Input Terminal)
70 % Green Horizontal Signal
(PC Input Terminal)
70 % Blue Horizontal Signal
SPECIFICATION
Refer to Description below
Note:
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.
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