TA1317AFG Datasheet, PDF (36/58 Pages) Toshiba Semiconductor – Deflection Processor IC for TV

TA1317AFG
Note
No.
18
Parameter
EW top corner correction (EW
top corner) change amount
SW6
OFF
SW7
B
SW8
ON
Test Condition
SW Mode
SW10 SW13 SW14 SW21 SW30
Test Method
(unless otherwise specified, V_CC = 9 V, Ta = 25 ± 3°C, data = preset values)
OFF B
ON
A
A (1) Input vertical trigger pulse to pin V_IN.
Pulse level (VT) = 3.0 V
(2) Apply external power supply (DC voltage = 7 V) to pin 3 (EHT IN).
(3) Set EW PARABOLA (sub-address: 0A) to center (data: 20).
(4) Set EW TOP CORNER (sub-address: 0C) to minimum (data: 00) and measure Pin
13 (EW FD) amplitude V_TC (00).
(5) Set EW TOP CORNER (sub-address: 0C) to maximum (data: F8) and measure Pin
13 (EW FD) amplitude V_TC (F8).
(6) Calculate change amounts V_TCP and V_TCN using the following formulas.
VTC(00)
VTC(F8)
Pin 13 (EW FD) waveform
V_TCP =
V_TC (00) − V_PB (20)
V_PB (20)
× 100
V_TCN =
V_TC (F8) − V_PB (20)
V_PB (20)
× 100
36
2005-08-18