Service Adjustments - Sanyo VM-6609PA Service Manual

2. SERVICE ADJUSTMENTS

ADJUSTMENT
TIMING
ITEM
PATTERN
HORIZONTAL PATTERN GENERATOR
HOLD AD- MODE CROSS-HATCHED
JUSTMENT PATTERN
VERTICAL PATTERN GENERATOR
SIZE ADJUST- MODE MONOSCPE
MENT PATTERN
HORIZONTAL PATTERN GENERATOR
WIDTH AD- MODE CROSS-HATCHED
JUSTMENT PATTERN
VERTICAL PATTERN GENERATOR
LINEARITY MODE CROSS-HATCHED
ADJUSTMENT PATTERN
FOCUS PATTERN GENERATOR
ADJUSTMENT MODE CROSS-HATCHED
PATTERN
RASTER PATTERN GENERATOR
CENTERING MODE CROSS-HATCHED
ADJUSTMENT PATTERN
RASTER TILT PATTERN GENERATOR
ADJUSTMENT MODE CROSS-HATCHED
PATTERN
BRIGHTNESS PATTERN GENERATOR
ADJUSTMENT MODE FULL-WHITE
PATTERN
VERTICAL PATTERN GENERATOR
HOLD AD- MODE MONOSCPE
JUSTMENT PATTERN
INTERLACE CAMERA SIGNAL
ADJUSTMENT
VR
SETTING
LOCATION
CONTRAST VR
VR404
AND BRIGHT
VR TO CENTER.
CONTRAST VR
VR302
AND BRIGHT
VR304
VR TO CENTER.
CONTRAST VR
L402
AND BRIGHT
VR TO CENTER.
CONTRAST VR
VR301
AND BRIGHT
VR TO CENTER.
CONTRAST VR
VR405
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
VR402
AND BRIGHT
VR TO MAX.
CONTRAST VR
VR303
AND BRIGHT
VR TO CENTER.
CONTRAST VR
VR303
AND BRIGHT
VR TO CENTER.
– 7 –
ADJUSTMENT PROCEDURE
Turn off horizontal sync. (pin to ground)
Adjust VR404 to make pattern upright.
Set the power switch "ON" and adjust
VR302 and VR304 until height for eye
comfort is obtained.
Horizontal width is adjusted by means of
the width coil L402 on the main PWB,
width standard hexagonal alignment tool.
Adjust L402 to make picture width within
"2" position.
Adjust the vertical linearity control VR301
for equal spaceing of lines between the
center extreme of scan.
The focus control may be adjusted for
optimum focus by VR405.
The raster is centered by rotating the two
small at the rear of the yoke.
Loosen the screw on the rear of deflection
yoke, rotating the yoke to correct position
tighten the screw.
Brightness can be controlled by VR406
and VR201 is the main control which is
controlled at exeternal side of front side.
VR402 is a sub-bright control which is
located on the main PWB.
The vertical hold is automatic stop rolling.
But can't hold must adjust VR303.
Adjust VR303 have gap of vertical scan
line distinguish clearly.
1
1
3
3
5
5
1 3 5 7
5
5
3 3
1 1
Fig. 7
7 5 3 1