LA76075 Datasheet, PDF (33/35 Pages) Sanyo Semicon Device – NTSC Color Television Sets

LA76075
Continued from preceding page.
Item
Symbol
[Keystone distortion compensation]
East/West parabola tilt
@32
EWtilt32
Measurement
Point
Input
Signal
Measurement Procedure
Monitor the pin 18 East/West (parabola wave) output,
measure the voltages for lines 22 (Va) and 262 (Vb),
and substitute in the following formula.
YIN:
EWtilt32 = Va – Vb
Composite
18
horizontal and
vertical
synchronization
signal
Bus Condition
East/West parabola tilt
@0
EWtilt0
Monitor the pin 18 East/West (parabola wave) output,
measure the voltages for lines 22 (Va) and 262 (Vb),
and substitute in the following formula.
YIN:
EWtilt0 = Va – Vb
Composite
18
horizontal and
vertical
WTILT : 000000
synchronization
signal
Monitor the pin 18 East/West (parabola wave) output,
measure the voltages for lines 22 (Va) and 262 (Vb),
and substitute in the following formula.
YIN:
EWtilt63 = Va – Vb
Composite
East/West parabola tilt
@63
EWtilt63
18
horizontal and
vertical
WTILT : 111111
synchronization
signal
[Corner distortion compensation]
Monitor the pin 18 East/West (parabola wave) output,
measure the voltage for line 22 under the conditions:
CORTOP = 1111 (Va) and CORTOP = 0000 (Vb), and
YIN:
Composite
substitute in the following formula.
EWcortop = Va – Vb
East/West parabola
corner top
EWcortop
18
horizontal and
vertical
CORTOP : 1111-0000
synchronization
signal
East/West parabola
corner bottom
EWcorbot
Monitor the pin 18 East/West (parabola wave) output,
measure the voltage for line 262 under the conditions:
CORTOP = 1111 (Va) and CORTOP = 0000 (Vb), and
YIN:
Composite
substitute in the following formula.
EWcorbot = Va – Vb
horizontal and
vertical
CORBOTTOM : 1111-0000
synchronization
signal
No. 5845-33/35