Sharp 50NP4, Руководство по обслуживанию

Страница: 38 / 121

38
Notes: (1) Only adjust the vertical size for
progressive mode (NTSC).
Because both modes (NTSC and
HD) have the same vertical
freuency.
(2) If internal cross-hatch does not
appear after clearing RAM data,
press service switch again (on
POWER/DEFLECTION PWB).
(3) To restore old RAM data, turn TV
off and on.
=
PROGRESSIVE
MODE
50NP4 650
60NP4 770
Tolerance:
w
5mm Unit:mm
2.7 Vertical size adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Set video conditions to factory preset.
(3) Horizontal size adjustment should be finished.
(4) Static focus adjustment should be finished.
(5) Start adjustment after TV is turned on for 20
minutes or more.
Adjustment procedure
(1) Receive any NTSC signal.
(2) Press and hold the SERVICE ONLY SW on
DEFLECTION PWB to display DCU crosshatch
with convergence data cleared.
(3) Adjust V. SIZE as following by using R630 .
(4) After adjustment, press SERVICE ONLY switch
to exit from DCU crosshatch.
PROGRESSIVE MODE
(RED) (BLUE)
50NP4 15 25
50NP4 15 25
Tolerance:
w
2mm
1
2
2.8 Horizontal size adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Set video conditions to factory preset.
(3) BEAM FORM adjustment should be finished.
(4) Convergence should not be corrected.
(5) Start adjustment after TV is turned on for 20
minutes or more.
Adjustment procedure
(1) Receive any NTSC signal.
(2) Press and hold the SERVICE ONLY SW on
DEFLECTION PWB to display DCU cross-hatch
with Convergence data cleared.
(3) Convergence should not be adjusted.
(4) Adjust H. SIZE by using R683.
(5) After adjustment, press SERVICE ONLY SW to
exit from DCU cross-hatch.
(1) Input 1080I (fH=33. 75kHz) component signal to
VIDEO 2.
(2) Press and hold the SERVICE ONLY SW on
DEFLECTION PWB to display DCU cross-hatch
with convergence data cleared.
(3) Adjust H. SIZE using R686.
(4) After adjustment, press SERVICE ONLY SW to
exit from DCU crosshatch.
H. SIZE SPECIFICATION
PROGRESSIVE MODE
HD MODE
=
PROGRESSIVE
MODE
HD
MODE
50NP4 995 995
60NP4 1190 1190
Tolerance:
w
5mm Unit:mm
Geometric
center of the
screen
R B
(2) Upon completion of adjustment, fix beam
alignment 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
2.6 Raster position adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Receive the DCU cross-hatch signal.
(3) Set video conditions to factory preset.
(4) Static Focus adjustment should be finished.
(5) The digital convergence RAM should be cleared
(uncorrected state). With the TV set off, press
and hold the service switch located on the
Power/Deflection 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.
V. SIZE SPECIFICATION