Sanyo VMC-8621P, Service Manual

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ADJUSTMENT
ITEM
TIMING
PATTERN
SETTING
VR
LOCATION
ADJUSTMENT PROCEDURE
CHECK B+
VOLTAGE
HOLD DOWN
VOLTAGE
SETTING
FOCUS
ADJUSTMENT
HORIZONTAL
PHASE
ADJUSTMENT
HORIZONTAL
SIZE
ADJUSTMENT
VERTICAL
LINEARY
ADJUSTMENT
VERTICAL
CENTER
ADJUSTMENT
VERTICAL
SIZE
ADJUSTMENT
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
TEST POINT : D910(-)
DIGITAL VOLT METER
VALUE 125.5
±
0.5 VDC.
TEST POINT : ZD501(-)
DIGITAL VOLT METER
VALUE 8.75
±
0.1 VDC.
Adjusting FBT Focus VR make focus
resolution of reach over 450TV lines, four
corners must be aiso clear.
Adjusting VR401 horizontal phase make
right and left of picture to <=1%.
Adjusting VR306 make signal side of
picture of scale at 1.5 ~ 2.2 position.
Adjusting vertical linear control VR302 for
equal spacing of lines between center
extreme of scan [(Max-Min)/Aver-
age]<=10%.
Adjusting vertical center control VR303 to
<=1%.
Adjusting vertical size control VR301
make signal side of scale is 1.0 ~ 1.5
position.
VR503
FTB FOCUS
VR
VR401
VR306
VR302
VR303
VR301
BRIGHT VR and
CONTRAST VR
TO MAX.
BRIGHT VR and
CONTRAST VR
TO 75%.
SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
2. SERVICE ADJUSTMENTS
1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes.
NOTE
Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting.
Adjustment tool
1. Digital multi meter
2. Pattern generator
3. Color analyzer
Adjustment mode
Over scan mode