Sharp C-2890EES, Service Manual

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24
AK - 45
CHASSIS
Y-Delay SECAM
Enter a SECAM B/G colour and black-white bar test pattern via RF. Adjust Y-Delay SECAM till the
colour transients on the colour bar of the pattern become as sharper and colours between transients do
not mix with each other as possible.
Y-Delay NTSC
Enter an NTSC colour and black-white bar test pattern via RF. Adjust Y-Delay NTSC till the colour
transients on the colour bar of the pattern become as sharper and colours between transients do not
mix with each other as possible.
Y-Delay other
Not used.
Vertical Position Offset
This value is fixed (127)
Vertical Position Offset
This value is fixed (127)
Horizontal Position Offset
This value is fixed (127)
Horizontal Position Offset
This value is fixed (127)
Vertical Blank Start
This register will be used only at 4:3 tubes for 16:9 mode adjustment. It adjusts the vertical blank start
position.
Vertical Blank Stop
This register will be used only at 4:3 tubes for 16:9 mode adjustment. It adjusts the vertical blank stop
position.
Angle
Change Angle by pressing Left/Right buttons till the vertical lines of the crosshatch pattern become
completely perpendicular to horizontal lines without any angle of vertical deviation. Check and readjust
ANGLE item if the adjustment becomes improper after some other geometric adjustments are done.
Bow
Change Bow by pressing Left/Right buttons till the vertical lines especially ones close to the left and
right sides will of equal and symmetrical bending, i.e. they together will neither be towards left side nor
right side. Check and readjust BOW item if the adjustment becomes improper after some other
geometric adjustments are done.
4:3 Horizontal Blank Start
This register will be used only at 16:9 tube for 4:3 mode adjustment. It adjusts the horizontal blank start
position.
4:3 Horizontal Blank Stop
This register will be used only at 16:9 tube for 4:3 mode adjustment. It adjusts the horizontal blank stop
position.
EHTV Compensation
It’s used to adjust the EHT compensation vertical gain coefficient.
EHTTM Compensation
It’s used to adjust the EHT compensation time constant.
EHTEW Compensation
It’s used to adjust the EHT compensation east/west gain coefficient.