Service Adjustments - Sanyo VMC-8615FP Service Manual

3. 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 (luminance Mindlta)
Adjustment mode
Over scan mode
ADJUSTMENT
TIMING
ITEM
PATTERN
PATTERN GENERATOR
B+ VOLTAGE
MONOSCOPE PATTERN
ADJUSTMENT
PATTERN GENERATOR
HOLD DOWN
MONOSCOPE PATTERN
VOLTAGE
SETTING
PATTERN GENERATOR
FOCUS
MONOSCOPE PATTERN
ADJUSTMENT
PATTERN GENERATOR
PINCUSHION
MONOSCOPE PATTERN
ADJUSTMAN
PATTERN GENERATOR
HORIZONTAL
MONOSCOPE PATTERN
PHASE
ADJUSTMENT
PATTERN GENERATOR
HORIZONTAL
MONOSCOPE PATTERN
SIZE
ADJUSTMENT
(VMC-8614F
only)
PATTERN GENERATOR
HORIZONTAL
MONOSCOPE PATTERN
SIZE
ADJUSTMENT
(VMC-8615FP
only)
PATTERN GENERATOR
VERTICAL
MONOSCOPE PATTERN
LINEARY
ADJUSTMENT
VR
SETTING
LOCATION
Tiny Brightness
VR901
BRIGHT VR ,
VR503
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
FBT FOCUS
CONTRAST VR
VR
to 75%.
SHARPNESS
VR to MAX.
BRIGHT VR ,
VR305
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
VR401
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
VR306
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
VR306
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
VR302
CONTRAST VR
and SHARP-
NESS VR to
MAX.
– 7 –
ADJUSTMENT PROCEDURE
TEST POINT : D910(-)
DIGITAL VOLT METER
VALUE 47.5 ± 0.5 VDC.
TEST POINT : PIN1
DIGITAL VOLT METER
VALUE 8.5 ± 0.2 VDC.
Adjusting FBT FOCUS VR to make focus
resolution of reach over 800 TV Lines,
Center and four corners must be clear.
Adjusting VR305 to make the vertical line
of the picture in a beeline.
Adjusting VR401 horizontal phase to
make screen right and left symmetrize.
Adjusting H-size control VR306 to make
signal side of picture of scale is "3"
position.
Adjusting H-size control VR306 to make
signal side of picture of scale is "2"
position.
Adjusting VR302 V-LINEARITY to make
up/down linear be identical.