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參數(shù)資料
| 型號： | LA76810HA |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP54 |
| 封裝： | 0.600 INCH, DIP-54 |
| 文件頁數(shù)： | 21/41頁 |
| 文件大小： | 417K |
| 代理商： | LA76810HA |
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LA76810HA
No.A1143-28/41
Continued from preceding page.
Input signal
Symbol
Test point
Input signal
Test method
Bus bit/input signal
<High-voltage dependent vertical size correction>
Vertical size
correction@0
Vsizecomp
Y IN:
Horizontal/
vertical sync
signal
PAL
Monitor the pin 23 vertical ramp output and
measure the voltage at the line 24 and line 310
with VCOMP = 000. Calculate as follows:
Va = Vline310-Vline24
Apply 4.1V to pin 13 and measure the voltage at
the line 24 and line 310 again. Calculate as
follows:
Va = Vline310-Vline24
Calculate as follows:
Vsizecomp = Vb/Va
VCOMP: 000
<Vertical screen position adjustment>
Vertical ramp DC
voltage
PAL@32
NTSC@32
Vdcpal32
Vdcnt32
Y IN:
Horizontal/
vertical sync
signal
PAL
NTSC
Monitor the pin 23 vertical ramp output and
measure the voltage at line 167. (PAL)
Monitor the pin 23 vertical ramp output and
measure the voltage at line 142. (NTSC)
Vertical ramp DC
voltage
PAL@0
Vdcpal0
Y IN:
Horizontal/
vertical sync
signal
PAL
Monitor the pin 23 vertical ramp output and
measure the voltage at line 167.
VDC: 000000
Vertical ramp DC
voltage
PAL@63
Vdcpal63
Y IN:
Horizontal/
vertical sync
signal
PAL
Monitor the pin 23 vertical ramp output and
measure the voltage at line 167.
VDC: 111111
Continued on next page.
Line 310
Line 24
Vertical ramp output
23
Line 167
T h is
catalo g
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