Toshiba 40WH08B, Service Manual

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GENERAL ADJUSTMENTS
Model Adjustment points Adjustment methods
40WH08G
40WH08B
Electrical focus
Lens focus
(Precautions)
Conditions: (1) RED, BLUE: Internal Retoma signals (PAL)
(2) GREEN: Internal crosshatch signal (white crosshatch on black background)
(3) User adjustment: Dynamic mode, cinema mode
(4) Carry out electrical focus and lens focus after rough adjustment.
(5) Use the jig to protect everything, except the color subjected to adjustment, from exposure to light.
(1)Receive the internal Retoma signals, use the focus VR of the focus pack (Z410), and adjust the electrical focus of
each R and B projection tube to the position where the center of the screen gets optimally focused.
(2)Receive the internal crosshatch signals, use the focus VR of the focus pack (Z410), and adjust the electrical focus of
G so that the vertical scanning lines on the screen center can appear most clearly.
(1)R, B: Receive the internal Retoma signals, watch the screen center and its periphery, and make adjustment to the
best possible focus.
(2)G: Adjust this by the method
y
Carry out anticipated adjustment on the G lens, considering the time until the lens focus stabilizes.
x
The level of anticipated adjustment on the G lens results in a required level of correction, if an adjustment point is
set on the screen.
c
During a heat run, be sure to keep lower the G’s screen VR of the focus pack from turning on the power of the set
until immediately before the cutoff adjustment in order to stabilize the G’s coupling liquid temperature.
Focus adjustment method (1/2)