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6.1.12Store the set result and exit OSD.
(the values for pincushion, trapezoid, balance pincushion and
parallelogram can be copied to the other pre-set modes to
shorten alignment time)
6.2 Other pre-set modes geometry adjustment
Use following procedure for all pre-set modes (except 80kHz/75Hz)
(Timing Table 1 - 14)
6.2.1 Adjust the Horizontal Position to CRT center position.
6.2.2 Adjust the Horizontal video Size to 355mm
6.2.3 Adjust the Vertical Position to CRT center position .
6.2.4 Adjust the Vertical video size to 265 mm.
6.2.5 Adjust pincushion to get optimum vertical line.
6.2.6 Adjust trapezoid to get optimum vertical line.
6.2.7 Adjust balanced pincushion to get optimum vertical line.
6.2.8 Adjust the parallelogram to get optimum vertical line ,
(6.2.5, 6.2.6, 6.2.7 and 6.2.8 may need some iteration)
6.2.9 Adjust the Top/Bottom corner control to get best corner
geometry distortion .
(6.1.7, 6.1.8, 6.1.9 and 6.1.10 may need to be readjusted) make
sure total geometry distortion meet Fig 4 spec (except corners
distortion must meet Note 3 spec) .
6.2.10 Store the set result and exit OSD.
6.2.11 Repeat above items (from 6.2.1 to 6.2.9 ) with all pre-load
modes (see Form 1)& store the results to EPROM .(Note : all these
parameters of geometry distortion can be stored in EPROM previously
before alignment if those parameters were confirmed by auto
alignment equipments & make sure they all obey below function:
a. Adapt with any one pre-load mode ,H-size should larger than
280mm when adjust H-size to minimum dimension in user operation .
6.2.12 V - size regulation & H-size regulation should be confirmed
by human inspection after auto alignment to make sure they are
all inside spec ,failed set should be readjusted .
criteria of human inspection : < = 1.5 mm (@ 31k ~ 97k) .
(at rated light o/p ,measure the image deviation between video
pattern change from cross-hatch pattern to reverse cross-hatch
pattern ), only check pre-set modes .
7. Convergence adjustment .
release magnetic assy located on Yoke assy ,apply 91.1K/85Hz ,
1280 x 1024 mode with crosshatch pattern ,set video size as Fig 1 ,
remove blue video ,adjust 6 pole magnetic to let red line & green
line overlap together completely ,recovery blue video,remove green
video ,adjust 4 pole magnetic to let red line & blue line overlap
together completely ,refer Fig 6 to make sure mis-convergence
meet below spec, fix magnetic assy if mis-convergence meet spec.
Area C : < = 0.35mm Area A : < = 0.25 mm
Note: Stick small piece magnetic on CRT is available if above
adjustment can not meet spec.
8 . Focus adjustment
Apply 1280 X 1024 (91.1K/85hz) mode ,set brightness at 50%
and contrast at 100% , fill ME pattern shown at Spec in full screen ,
adjust focus pot-meters which are located on fly-back transformer
until each M & E character is clearly identified in all display area .
9.
Adjustment of Moire
Store H - Moire & V-Moire DAC value in EEROM according to
Form 1 preset value , the moire is acceptable if not exceed 1/ 3
area at 15 FL contrast . (all factory modes are available for this spec)
Electrical Instructions
109B6 CRT
30
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