Quadro CTV-37D10 TXT Service manual - Service Adjustments
Service Adjustments
-15-
(4)VERTICAL&YUV/RGB HORIZON ADJUST(KEY2 ):
5VSL 50HZ vertical linearity 5SCL 50Hz vertical slope correction
5VSH 50Hz vertical center 5VAM 50Hz vertical size
6VSL 60HZ vertical linearity 6SCL 60HZ vertical slope correction
6VSH 60HZ vertical center 6VAM 60HZ vertical size
a. Receive 50Hz cross hatch signal, set TV to STANDARD mode, press digital key “2”
after enter factory mode, adjust 5VSL so that picture’s vertical line is just at the
bottom of the half picture.
b. Adjust 5VSH to set picture vertical center to CRT center.
c. Adjust 5SCL to set proper vertical linearity
d. Adjust 5VAM to obtain picture’s vertical re-display ratio more than 90% .
e. If necessary, fine adjust above items.
f. Receive 50HZ RGB or YUV cross hatch signal,set TV to STANDARD mode,adjust
5RGH till picture horizontal center is at the CRT center.(OPTION)
g.
h. Receive 60Hz cross hatch signal, repeat above a,b.
f.Receive 60HZ RGB or YUV cross hatch signal,repeat above items.(OPTION)
(5) OSD POSITION:
4-6-1 Menu OSD position adjustment: Receive 50/60HZ cross hatch pattern. Set
TV standard status. Press
KEY 2
in factory mode, adjust 5VOF/6VOF and
HOF item, to obtain menu OSD at the center of CRT screen;
4-6-2 LOGO position adjustment: Receive 50/60HZ cross hatch pattern. Set TV
standard status. Press
KEY 7
in factory mode, adjust XMIN,XMAX,YMIN,
and YMAX item, to obtain LOGO at the center upto 1/3 of CRT screen.
4-6-3 TELETEXT OSD position adjustment: Receive 50/60HZ TELETEXT signal.
Set TV standard status. Press
KEY 7
in factory mode, adjust TXMI and
5TYM/6TYM item, to obtain INDEX at the center of CRT screen.
4-2
White Balance Adjustment (Applied in factory)
(
KEY 3
)
Normally, this chassis can auto adjust white balance, but for some CRT need to adjust
white balance carefully by hand
,
Set BRIGHTNESS and CONTRAST at normal status ,
receive GREY SCAL and entering factory mode press KEY 3, set WPR at 31, adjust WPG
and WPR to obtain white balance.
4-3
RF.AGC ADJUSTMENT(KEY 4 )
4-3-1 Receive 60dB RF signal. Connect Digital voltmeter positive terminal to
tuner AGC terminal and negative terminal to GND.
4-3-2 Enter the AGC item in factory mode by the REMOTE CONTROL.
Method
:
Press key S.M.,
,
in turn to enter factory mode, then