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參數(shù)資料
| 型號： | TB1254N |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP56 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-56 |
| 文件頁數(shù)： | 46/58頁 |
| 文件大?。?/td> | 526K |
| 代理商： | TB1254N |
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Ver3.7
00/01/28 50
Note
Items/Symbols
Bus conditoins
Measurement methods
D20
V. Ramp DC on
Service Mode
/ VNOVRAMP
V STOP:1
Others:Preset
(1)Set V STOP to 1.
(2)Measure the DC level of Pin24, that is "VNOVRAMP".
D21
Vertical Pull-in Range
(Auto)
/ FVPAUL
/ FVPAUH
Vertical Pull-in Range
(50Hz)
/ FVP50L
/ FVP50H
Vertical Pull-in Range
(60Hz)
/ FVP60L
/ FVP60H
V-Freq:
000/001/010
Others:Preset
(6) Input a composite sync signal into Pin38.
(7) For V-Freq 000/001/010, increasing the input vertical period
from 220H by 0.5H step, measure the period at which input
signal synchronized with V Ramp(Pin24), that is "FVPAUL" /”
FVP50L”/ "FVP60L".
(8) (3)For V-Freq 000/001/010, decreasing the input vertical
period from 360H by 0.5H step, measure the period at which
input signal synchronized with V Ramp, that is "FVPAUH" /”
FVP50H”/ "FVP60H".
D22
Vertical
Period
on
Fixed Mode
/ TV3125
/ TV2625
/ TV313
/ TV263
V-Freq:
100/101/110/
111
Others:Preset
For V-Freq 100/101/110/111, measure the vertical period at SCP
out (Pin30), that is "TV312.5"/"TV262.5" / "TV313"/"TV263" .
D23
V-BLK Start Phase
/ PH50VBLK
/ PH60VBLK
V-BLK Width
/ W50VBLK
/ W60VBLK
All:Preset
(1)Input a 50Hz/60Hz composite sync signal into Pin38.
(2)Measure "T50AFCOFF" / "1T60AFCOFF" at Pin30. (cf. Fig.D25)
D24
Sand
Castle
Pulse
Level
/ VSCPH
/ VSCPM
/ VSCPL
All:Preset
Measure "VSCPH" / "VSCPM" / "VSCPL" at Pin30.
V
SCPL
V
SCPM
V
SCPH
D25
Vertical
Ramp
Amplitude
/ VVRAMP
All:Preset
Measure the V Ramp amplitude at Pin24, that is "VVRAMP".
D26
Vertical AMP Gain
/ GVAMP
Vertical AMP
Max.Output Level
/ VVOMAX
Vertical AMP
Min.Output Level
/ VVOMIN
All:Preset
(1)Let Pin26 be open.
(2)Changing the Pin25 DC voltage, measure "VVOMAX" / "VVOMIN" /
"GVAMP"
according to a following figure.
V
VOMAX
V
VOMIN
V=GVAMP
=20log(V#26/V#25)
#25DC
#26DC
D27
Vertical
AMP
Max.Output Current
/ IVOMAX
All:Preset
(1)Supply 7V to Pin25.
(2)Measure the current from Pin26 to GND, that is "IVOMAX".
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