Toshiba 61PH18P, Service Manual

Page: 17 / 74

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GENERAL ADJUSTMENTS
Adjustment items Adjusting methods
4) Adjust the G lens focus. (Applicable only to 43PH, 42W)
Watch the horizon of the left and right both ends of the screen (the range of
circle with 100mm diameter shown in the following sketch), make optimum
adjustments on the G lens focus, and check that the focus balance on the
right and left is satisfactory.
(Balance check of left-and-right G lens focus)
(1) Adjust the G lens focus best by crosshatch of the left end (or the right end).
(2) Check the focus of the right end (orthe left end).
If the balance of the left and right lens focus (flare) is different, part it and
adjust to the medium quality.
Check the environment and confirm that the focus quality (including flare) is
within a tolerable range.
Focus adjustment
The method mentioned left is
applied to the focus adjustment
on the G lens adjustment of
43PH, 42W.The details of G
lens adjustment for 50PH,61PH,
50W, and 57W are described in
the previous page.
Concerning items 1), 2), 3), and 5) of G adjustment, these are common to the ones
on the previous page.
3. R adjustment
1) Set to the R monochrome by lens cap.
2) Receive the image of Retma pattern.
3) Adjust the R electrical focus.
Adjust by focus volume of the focus block (Z410) so that the screen center will
come to optimum focus.
4) Adjust the R lens focus.
Adjust so that the screen center will become the best.
5) Repeat 3, 4, and attempt to further improve the focus quality.
Point to be noted during
G lens focus adjustment
(To be adjusted within
circles of 100mm diameter
contacting the left and
right of the bezel)