Sony KV-27EXR25, Technical Service Data

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MISCELLANEOUS ADJUSTMENTS
continued
HORIZONTAL SIZE
Tune in a crosshatch pattern. Enter the Service Adjustment Mode.
Select HSIZ, and adjust level for slight horizontal overscan. Save ad-
justment to memory.
HORIZONTAL CENTER (HPOS)
Perform Horizontal Frequency Adjustment. Tune in a crosshatch pat-
tern. Adjust Horizontal Centering Connector (A-55) for best horizon-
tal centering. Enter the Service Adjustment Mode. Select HPOS, and
adjust level for best horizontal centering. Save adjustment to
memory.
PINCUSHION (PAMP, CPIN, PPHA)
Tune in a crosshatch pattern. Enter the Service Adjustment Mode.
Select PAMP, and adjust level for straight vertical lines at left and
right of screen. Save adjustment to memory. Select
and adjust
level for straight vertical lines at top and bottom of screen. Save ad-
justment to memory. Select PPHA, and adjust level for equal spacing
of vertical lines from top to bottom of screen. Save adjustment to
memory.
VERTICAL FREQUENCY
Tune in a pattern. Enter the Service Adjustment Mode. Se-
lect VFRE adjustment, and adjust the level until the picture locks in.
Save adjustment to memory.
VERTICAL SIZE
Tune in a crosshatch pattern. Enter the Service Adjustment Mode.
Select VSIZ, and adjust level for slight vertical overscan. Save ad-
justment to memory.
VERTICAL POSITION
Tune in a crosshatch pattern. Enter the Service Adjustment Mode:
Select VPOS, and adjust level to center picture vertically. Save ad-
justment to memory.
VERTICAL LINEARITY
Tune in a crosshatch pattern. Enter the Service Adjustment Mode.
Select VLIN, and adjust level for equal vertical spacing of pattern.
Save adjustment to memory.
VERTICAL COMP
Enter the Service Adjustment Mode. Select VCOM, and adjust level
to 02. Save adjustment to memory.
CHROMA TRAP (CROM)
Tune in a pattern. Set Color to Maximum, and turn NOTCH
on. Connect an oscilloscope to (On C-Board). Enter the Ser-
vice Adjustment Mode. Select CROM, and adjust level for MINI-
MUM
Save adjustment to memory.
SUB BRIGHTNESS
Tune in a crosshatch pattern. Set Picture and Brightness to MINI-
MUM. Enter the Service Adjustment Mode. Select SBRT, and adjust
level for visible highlights. Save adjustment to memory.
SUB CONTRAST
Tune in a crosshatch pattern. Enter the Service Adjustment Mode.
Select
and adjust level for best picture. Check tracking by ad-
justing Picture and Brightness to MINIMUM and Maximum and
check for blooming. Readjust if necessary. Save adjustment to
memory.
SUB HUE AND SUB COLOR (SHUE, SCOL)
Tune in a pattern. Connect an oscilloscope to (On
C-Board). Enter the Service Adjustment Mode. Select SCOL, and
adjust level for
p-p. Tune in an active channel. Select SHUE,
and adjust level for proper skin tones. Save adjustment to memory.
S CORRECTION
Enter the Service Adjustment Mode. Select VSCO, and adjust level
to 0. Save adjustment to memory.
COLOR PURITY
Use a degaussing coil to demagnetize the CRT and mounting brack-
ets. Enter the Service Adjustment Mode. Adjust ROFF and BOFF
levels to MINIMUM. Adjust GOFF for a green raster. Loosen
Deflection Yoke clamp screw and slide it backward to obtain a verti-
cal green band. Adjust purity rings to center the vertical green band.
Slide the Deflection Yoke forward until a uniform green screen is
obtained. Check Blue and Red purity by adjusting the ROFF, GOFF,
and BOFF levels. Return all controls and adjustments to normal lev-
els.