Hitachi C43-FD5000, Service Manual

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SERVICE ADJUSTMENTS
2.16 BLUE DEFOCUS ADJUSTMENT
Adjustment Preparation
(1) Optical and electrical focus adjustment should be completed.
(2) The convergence adjustment should be completed.
(3) VIDEO control should be set to Factory Preset condition. (Contrast: maximum; Other items: center)
Adjustment Procedure
(1) Input cross-hatch signal to VIDEO or RF input.
(2) Turn the B FOCUS VR fully clockwise.
(3) If blue does not satisfy specification as shown in the table below, adjust it by turning the B FOCUS VR
counterclockwise.
Blue Defocus Luminance
CHASSIS DP3M UNIT
Screen size 43” 50” INCH
Blue out of specification 1.5 1.5 mm
Note: The view point should be limited to the center of the screen for this adjustment. (FOB 0.0)
2.17 WHITE BALANCE ADJUSTMENT
2.17.1 CHECK CUT OFF ADJUSTMENT
Adjustment Preparation
(1) Pre heat-run should be completed.
Adjustment Procedure
(1) Go to “SERVICE item No.10” and press [ ► ] key to enter CUT OFF adjustment mode by using JIG R/C.
(2) Check that each line just appears.
(3) If some of lines are brighter or darker than others, apply CUT OFF adjustment again.
(4) Press [ ◄ ] key to return normal mode.
2.17.2 WHITE BALANCE ADJUSTMENT
Adjustment Preparation
(1) Pre-heat 20 minutes or more before the adjustment.
(2) VIDEO control should be set to Factory Preset condition. (Contrast: maximum; others: center)
(3) Color temp. : COOL
(4) Signal: High Light white balance adjustment: WHOLE WHITE 100 IRE
Low Light white balance adjustment: WHOLE WHITE 25 IRE
Blue out of specification
High brightness white balance Low brightness white balance
Service mode Item No. Service mode Item No.
Red : (R DRV) 45 Red : (R cut OFF) 47
Green: (G DRV) 46 Green: (G cut OFF) 48
Blue : (B cut OFF) 49
Sub Brightness should be adjusted roughly
before adjust the white balance.