Blue Defocus - Hitachi 53SWX10B Service Manual

2.13 Blue defocus adjustment
Adjustment Preparation
(1) Optical and electrical focus adjustment should
have been completed.
(2) The convergence adjustment should have been
completed.
(3) Set Video conditions to factory preset.
(4) Input the cross-hatch signal.
Adjustment procedure
(1) Turn the B Focus VR (Focus Pack) fully
clockwise.
(2) Adjust sticking out level of blue to specification
shown in table below, by turning the (B) FOCUS
VR counter clockwise.
UNEVENNESS SPECIFICATION: ±1cd/m 2
Defocus sticking out specification
Screen Size
43"
53"
61"
Condition: User controls are set to the initial set
positions (for shipment)
Measuring point-Screen center.
2.14 White balance adjustment
(1) Screen adjustment
(2) High light white balance.
(3) Low light white balance.
I 2 C data for High light white balance
Green : G DRV (COOL) 3F (initial data)(Adjustable)
Red : R DRV (COOL) 3F (initial data)(Adjustable)
Blue : on FOCUS PACK EFPK
I 2 C data for Low light white balance
Green : G CUT OFF (COOL) 80 (initial) (Adj. data)
Red : R CUT OFF (COOL) 80 (initial) (Adj. data)
Blue : B CUT OFF (COOL) 80 (initial) (Fixed data)
Adjustment Preparation
(1) Adjustment should start 20 min. or more after the TV
power is turned ON.
(2) CUT OFF ADJ. should be finished.
(3) VIDEO control : Contrast is MAX., Others are center.
(4) Color temp. : COOL
STICKING OUT OF BLUE
Blue sticking out
1.0mm
1.0mm
1.0mm
(5) Signal:
* Hight Light white Balance Adj.
White raster 0.715Vpp (w/o sync., termination
incidence : 75ohm.) 100IRE
* Low Light white balance ADJ.
White raster 0.180Vpp (w/o sync., termination
incidence : 75ohm.) 25 IRE (The brightness
equal to 20cd/m
(6) BLUE defocus ADJ. should be finished.
(7) The vertical incident illumination on the screen
should be 20 Lux. or less.
(8 2
) Go into I C service mode.
Adjustment Procedure
A. High Light W/B adjustment
(1) Receive signal for High Light white balance ADJ.
(2) Adjust white balance to 10800K–0 MPCD (x=0.278;
y=0.280) at center of screen, using R DRV/ G DRV
with remote control.
B. Low Light W/B adjustment
(1) Receive signal for Low Light white balance ADJ.
(2) Adjust white balance to 10800K–0 MPCE (x =0.278,
y=0.280) at center of screen, using R CUT OFF/G
CUT OFF/B CUT OFF with remote control. Do not
touch screen VRs.
(3) Take Blue color as a reference color, then adjust Low
Light W/B by increasing other two colors CUT OFF
data. Do not change B CUT OFF data.
Repeat A & B two or three times, until no adjustment
is needed (white balance tracking-GOOD). If W/B
tracking is not good, set all data (BothDRV and CUT
OFF) to inital data, and change reference color to
different color.
Note: If Low Light adj. spec cannot be followed, apply
previous adj. spec. (adjust by eye.)
50 50 50
2 at screen center)