Hitachi 51F710A/DP55, Руководство по обслуживанию

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30
DP
55
1
,
2
≤±
2mm
1
≤
±2 mm
Notes: (1) If internal cross-hatch does not appear after
clearing RAM data, press service switch
again, on DEF./CONV. PWB.
(2) To restore old RAM data, turn TV off and on.
CROSSHATCH (GREEN)
2
(4) Receive cross-hatch signal.
Adjustment procedure
(1) Green (G) tube beam alignment adjustment.
Short-circuit TS (2p EH) subminiature connector
plug pins of Red (R) and Blue (B) on the CPT
boards and project only Green (G) light or you
may cover the R and B lens.
(2) Put Green (G) tube beam alignment magnet to
the cancel state as shown below.
(3) Turn the Green (G) electrical focus (Focus Pack)
counterclockwise all the way and make sure of
position of cross-hatch center on screen. (Halo
state.)
(4) Turn the Green (G) electrical focus (Focus Pack)
clockwise all the way. (Blooming state.)
(5) Turn two magnets forming alignment magnet in
any desired direction and move cross-hatch
center to position found in (3).
(6) If image position does not shift when Green (G)
static focus (Focus Pack) is turned. Green (G)
beam alignment has been completed.
(7) If image position shifts when Green (G) static
focus (Focus Pack) is turned, repeat (2)-(6).
(8) Conduct beam alignment for red (R) and
Blue (B) focus: Focus Pack UFPK.
(9) Upon completion of adjustment, fix beam
alignment magnets with white paint.
2.5 Beam alignment
Adjustment preparation
(1) Adjust at least 30 minutes after turning on power
switch.
(2) Raster tilt should be completed. Raster position,
horizontal and vertical size, and optical focus
adjustment should be coarse adjusted.
(3) Set video conditions to factory preset.
(4) Turn the deflection yoke of R or B and set so that the
inclination of R or B light with respect to the green
light is as shown below on the top and bottom sides.
(5) After raster inclination adjustment, the DY screw
should be screwed to 10-14kg-cm torque.
BACK TO ADJUSTMENTS
2.6 Raster position adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Input the single cross test signal.
(3) Set video conditions to factory preset.
(4) The electrical focus should have been coarse
adjusted.
(5) The digital convergence RAM should be cleared
(uncorrected state). With the TV set off, press
and hold the service switch located on the
DEF./CONV. PWB and then press the power
button.
(6) Start adjustment 20 minutes or more after TV is
turned on.
Adjustment procedure
(1) Turn the centering magnets for red, green, and
blue to satisfy the condition below. The red and
blue horizontal lines should match with green.
(RED) (BLUE)
51”, 57", 65" 20 25
Tolerance: ± 2mm
1
2
Geometric
center of the
screen
R B
(2) Upon completion of adjustment, fix centering
magnets with white paint.
NOTES: (1) If internal cross-hatch does not appear
after clearing RAM data, press service
switch again.
(2) To restore old RAM data, turn TV off and
on.
1 2
Units = millimeters
25.4mm = 1in.
G