Hitachi CM615ET, Service Manual

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3
E-2. Light output adjust
Select Timing 1, preset BRI. And CONT. to max. position.
Adjust G2 to get G2 = 550V
±
10V
Adjust VR803 to get light output = 0.6FL ~ 0.5FL
Select Timing 2, adjust VR405 to get pattern over scan. (H SIZE 100%)
F. White Balance Adjustment (9300°as major temperature) Low light
adjust
9300
°
6500
°
5000
°
x = 0.283
±
10 x = 0.313
±
10 x = 0.324
±
10
y = 0.297
±
10 y = 0.329
±
10 y = 0.342
±
10
Y = 0.6 ~ 0.8FL Y = 0.6 ~ 0.8FL Y = 0.6 ~ 0.8FL
Select Timing 6, adjust BRI. And CONT. to max. disconnect R. G. B. signals, adjust R/B BAIS to 100 scale
(OSD then solowly adjust G BAIS to 100 scale adjust VR803 to get light output = 0.6 ~ 0.8FL for 9300,
repeat above steps for 6500 and 5000 R/B GAIN setting to get raster color temperature within specified,
finally, adjust BRI to get raster = 0.06FL.
High light adjust
9300
°
6500
°
5000
°
x = 0.283
±
10 x = 0.313
±
10 x = 0.324
±
10
y = 0.297
±
10 y = 0.329
±
10 y = 0.342
±
10
Y = FL Y = FL Y = FL
Select Timing 4, measure 2 "square, set CONT. to Max, position and SUB-CONT to 127, R/B GAIN to
200, G
GAIN to 200, adjust SUB-CONT to get light output = 50 FL for 9300, repeat above steps for 6500
and
5000 R/B GAIN setting to get color temperature within specified.
3. Select Timing 3 with full white pattern adjust OSD-ABL (SUB BRIGHTNESS) to get full white light
output = 30
±
1 FL.
G. Focus Adjustment
G-1. Adjust brightness, have the brightness of raster be 0.06FL and contraset be 35FL in timming 6.
G-2. Adjust the G4a and G4b of theFBT, have focus be in the best condition on the 1/4 diagonal of
screen in timing 5.