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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
ITEM
TIMING
PATTERN
SETTING
VR
LOCATION
ADJUSTMENT PROCEDURE
B+ VOLTAGE
ADJUSTMENT
HOLD DOWN
VOLTAGE
SETTING
FOCUS
ADJUSTMENT
PINCUSHION
ADJUSTMAN
HORIZONTAL
PHASE
ADJUSTMENT
HORIZONTAL
SIZE
ADJUSTMENT
(VMC-8614F
only)
HORIZONTAL
SIZE
ADJUSTMENT
(VMC-8615FP
only)
VERTICAL
LINEARY
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 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.
VR901
VR503
FBT FOCUS
VR
VR305
VR401
VR306
VR306
VR302
Tiny Brightness
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR to
MAX.
BRIGHT VR ,
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.
