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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
Adjustment mode
Over scan mode
ADJUSTMENT
ITEM
TIMING
PATTERN
SETTING
VR
LOCATION
ADJUSTMENT PROCEDURE
CHECK B+
VOLTAGE
HOLD DOWN
VOLTAGE
SETTING
FOCUS
ADJUSTMENT
HORIZONTAL
PHASE
ADJUSTMENT
VERTICAL
LINEARY
ADJUSTMENT
PINCUSHION
ADJUSTMAN
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
CROSS HATCH PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
TEST POINT : D910(-)
DIGITAL VOLT METER
VALUE 46.0 ± 0.5 VDC.
TEST POINT : ZD501(-)
DIGITAL VOLT METER
VALUE 8.5 ± 0.2 VDC.
Adjusting FBT FOCUS VR to make
csreen corner & center focus be identical.
Adjusting VR401 horizontal phase to
make screen right and left symmetrize.
Adjusting vertical linear control VR302 for
equal spacing of lines between center
extreme of scan.
Adjusting VR304 to make pincushion
distortion be identical.
Adjusting VR303 to make screen up &
down symmetrize.
Adjusting VR301 to make screen V-size
to level wide3/4.
VR503
FBT FOCUS
VR
VR401
VR302
VR304
VR303
VR301
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.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.