BELINEA 10 55 70, Service Manual

Page: 41 / 80

4.15. Display Size Stability
Inputer a full white pattern in primary mode, set
brightness at
and the display size. Adjust the
brightness to 30FL and remeasure the display size. The
fereness should be less than
--
4.16. Color Purity Verification .
1. Input a full white pattern in primary mode and adjust
external brightness so there is no background brightness
and adjust external contrast to
Make a visual
check of color purity as follows:
a)Input the red signal only; no green (G) or blue
should be visible.
the G signal only; no R or B should be visible.
the B signal only; no R or G should be visible.
4.17. Video Noise
Input a cross hatch pattern or full white pattern in primary
mode and make a visual check from a distance of
(19
inches) for any video noise or other on-screen interference.
4.18. Power Saving Check
1. Input cross hatch pattern in primary mode.
2 . Turn OFF H-Sync signal, the power indicator LED have
to change the emitting color from green to orange, then
turn ON H-Sync signal again, the picture shall be vis-
ible.
3 . Turn OFF V-Sync signal, the power indicator LED have
to change the emitting color from green to orange, then
turn ON V-Sync signal again, the picture shall be vis-
ible.
4 . Turn OFF H/V-Sync signal, the power indicator LED
have to change the emitting color from green to orange,
then turn ON
signal again, the picture shall
be visible.
4.19. Audio Power Amplifier Check,
1. Input audio signal from the audio signal generator to
of the audio in R/L-Side.
2 . Push L-Side switch on fixture and check the U.U.T of
the L-Side speaker out.
3. Push R-Side switch on fixture and check the of
the R-Side speaker out.
4 . Push L/R-Side switch on fixture and check the
of the L/R-Side speaker out.
5 . Push switch on fixture and check the U.U.T of
the phone jack out.
4.20. DDC Data Witting
Wing the DDC data in EEROM.
.