Assembled; 19 L-1. Memory Initialization; Adjustment; Comb Filter Operation Check - Hitachi 46UX51K Service Manual

1. ASSEMBLED P.W.B. ADJUSTMENT
1 .I Memory Initialization
Adjustment procedure
(1) Press INPUT key on Control Panel and then
Power On to access Video Chroma adjustment
mode.
(2) Receive signal on main picture.
(3) Check the OSD recording to table below, using
A v buttons on Remote Control.
*: Adjustable data
Others: Fixed data (be careful not to change)
(4) Check MENU key to exit VIDEO CHROMA
ADJUST mode.
NOTE: (1) If there is a different value than shown
in table above, for fixed data, adjust it
using 4) buttons (only in this case).
(2) When exchanging microprocessor and
TV is turned on for first time, it requires
initialization of VIDEO CHROMA ADJ
on Pl and P6.
1.2 Comb filter operation check
Adjustment preparation
(1) Receive the color bar signal at the regular tuning
point.
(2) Set the contrast control to MAX and the other
controls to center.
(3) Set the Al to OFF
Adjustment procedure
(I) Check that between the color bars there are line
dots every second color bar as shown in the
drawing.
1.3
Check@
and @
line dots.
I
1 AP73 i AP74 1
0
A
Dots
x
Dots
None
I
0
B
None None
Sub-picture position adjustment
Adjustment preparation
(1) Select signal on main picture.
(2) Video settings have to be at normal condition.
Adjustment procedure
Press &e INPUT and POWER button on Control
Panel at same time to access VIDEO CHROMA
ADJUST mode.
Select H POSI and V POSI using A v buttons.
Adjust the H POSl (HORIZONTAL) and V POSI
(VERTICAL) position using 4) buttons.
Press MENU button to exit VIDEO CHROMA
ADJUST mode.
Select single PINP mode and move the sub
picture, using the MOVE button. Distance
between PINP and edge of screen should be
equal when moved. If
it
is not,
repeat
(1) - (5).
NOTE: Check the position of MULTI PINP mode.
Check the right edge of the sub pictures for
MV-4 to make sure there is no separation
between the MULTI PINP and the edge of
the screen.
19