Hitachi C47-WD7000 Service Manual page 41

SERVICE ADJUSTMENTS
(5) In case of R lens.
Set the position where the chromatic aberration change from red to crimson.
As shown below, observe the vertical bright line and adjust lens focus where
the crimson or red chromatic aberration slightly appears inside and crimson or
red outside (reference value : 1~3mm) at the point specified in table below.
Change the signal and fine-adjust in the same way as the G lens.
OPTICAL FOCUSING ADJUSTMENT RED
LENS
SCREEN SIZE
(ASPECT RATIO)
PITCHES from CENTER
SIDE
COLOR
ABERRATION
I
O
(NOTE) * Slightly reddish or no color
** Slightly bluish or no color
(NOTE 2)
Setting to the center between Red and crimson is optimum.
L
I
HSA
43"
(4:3)
4.0
*
*
(2.0mm
)
MAX
**
(2.0mm
)
MAX
O
HSA
47" 50"
(16:9) (4:3)
3.0 3.0
41
HSB
57"
(16:9)
CROSS-HATCH
2.0
NOTE BELOW
UNIT
INCH
PITCHES
REFER TO