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DTD21U6/21U8 Manual de Servicio
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APPENDIX
IC DESCRIPTION
37
PIN NAME DIG.VDD
FUNCTION A Vdd terminal for of digital block. Supply HVcc voltage through 270 ohms of resistance. The voltage of this terminal is clipped to approximately 3.3V by the internal regulator.
31 37
INTERFACE
H VCC
30
30
2.6V
30
750
38
SYNC IN
An input terminal for Sync signal. The input sync tip is clamped by charging/discharging the coupling capacitors so as to align the Sync slice level. Input is through a low impedance buffer, (input level 1Vp-p/140IRE)
31
38 1k
33
39
Y IN
An input terminal for Y signal. The pedestal level is clamped by means of charging/discharging the coupling capacitor, therefore input through low impedance buffer. (1Vp-p/140IRE input level)
39 1k 1k 1k
42
19
40
DC RESTOR
A terminal to be connected wiht a capacitor to detect the average picture level for DC restoration. The ratio of the DC restoration is set by bus. Leave this terminal open if the DC restoration is not required.
