Hitachi SM0541 Service Manual page 8

Adjustment procedure 1
(when a colour differential meter is used)
1. First adjust [MID-L] tone [G:].
2. Select adjustment point [No.2][G:].
When the background is not [G] monochrome,
press the [ENTER] key on the Remote control
transmitter to change to solid [G] monochrome.
3. Measure the illumination at adjustment points No.
2, No.3, No.10 and No.11.
The values should be:
No.2 = Y2 [lx] No.10 = Y10 [lx]
No.3 = Y3 [lx] No.11 = Y11 [lx]
4. No.2 and No.3 adjustment point have the average
of Y2 and Y3.
Y2 = ( Y2 + Y3 ) / 2 ±2 [%]
Y3 = ( Y2 + Y3 ) / 2 ±2 [%]
5. No.10 and No.11 adjustment point have the
average of Y10 and Y11.
Y10 = ( Y10 + Y11 ) / 2 ±2 [%]
Y11 = ( Y10 + Y11 ) / 2 ±2 [%]
6. Then adjust [MID-L] tone [R] and [B].
When the background is [G] monochrome, press
t h e [ E N T E R ] k e y o n t h e R e m o t e c o n t r o l
transmitter to change to solid white.
7. Measure the colour co-ordinates of adjustment
point [No.1] and make a note of them.
Assume that they are x = x1, y = y1.
Note: W h e n t h e C L - 1 0 0 c o l o u r a n d c o l o u r
difference meter is used, the [ ](delta)
mode is convenient. When adjustment
point [No.1] colour co-ordinate has been
selected, set the slide switch on the side to
[ ](delta) while holding down the [F] button
on the front panel. The measurement
shown after this displays the deviation from
measurement point 1.
8. Measure the colour co-ordinates of measurement
point [No.2] and adjust [No.2][R:] and [B:] so that
the co-ordinates are as follows.
x = x1 ± 0.005 , y = y1 ± 0.010
CP-S235 (C10SM2)
9. Similarly, measure adjustment points [No.3] to
[No.17] and adjust their colour co-ordinates starting
in order from the small number points.
This completes adjustments required for [MIN].
Note: Since excessive correction may lead to a
10. Then adjust [MIN] tone [G] so that the adjustment
data set two times as much as [MID-L] tone [G].
This completes [G] colour adjustments.
11. Then adjust [MIN] tone [R] and [B].
Select [No.2] [B:] and press the [ENTER] key on
the Remote control transmitter to change to solid
white.
12. Measure the colour co-ordinates of adjustment
point [No.1] and make a note of them.
Assume that they are x = x1, y = y1.
13. N o w m e a s u r e t h e c o l o u r c o - o r d i n a t e s o f
measurement point [No.2] and adjust [No.2][R:]
and [B:] so that the co-ordinates are as follows.
x = x1 ±0.005 , y = y1 ±0.010 (Target)
x = x1 ±0.020 , y = y1 ±0.040
14. Similarly, measure adjustment points [No.3] to
[No.17] and adjust their colour co-ordinates starting
in order from the small number points.
This completes [MIN] tone adjustments.
15. Now make similar adjustments for [MID-H] tone.
(Adjust [MID-H] tone [G] so that the adjustment
data set half as many as [MID-L] tone [G].)
16. Now make similar adjustments for [MAX] tone.
(Adjust [MAX] tone [G] so that the adjustment
data set half as many as [MID-L] tone [G].)
8
correction data overview during internal
calculations, use the following values for
reference.
[No.2] to [No.5] ±40 or less
[No.6] to [No.9] ±50 or less
[No.10] to [No.13] ±70 or less
[No.14] to [No.17] ±120 or less