Daewoo DSC-3270E, Руководство по обслуживанию

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IC description
Pin 65 - GY Analog Green/Luma Input
This input pin takes the AC-coupled analog compinent sig-
nal Green or Luma. The amplitude is 1.0V maximum at 75
Ohms and a couplign capacitor of 220nF. Internally, the
DC-offset of the input signal is adjusted via the program-
mable internal clamping circuit. Connect to ground if not
used.
Pin 66 - GNDGY Analog Ground
This is the ground pin for the A/D converter of the Green
or Luma signal and must be connected to ground.
Note : All ground pins of the chip(i.e. 18,52,58,60,62,64,
66, and 68) must be connected together low rresistive.
The layout of the PCB must take into consideration the
need for a low-noise ground.
Pin 67 - RV Analog Red/V Chroma Input
This input pin takes the AC-coupled analog component
signal Red or V Chroma. The amplitude is 1.0V maximum
at 75ohms and a coupling capacitor of 220nF. Internally,
the DC-offset of the input signal is adjusted via the pro-
grammable internal clamping circuit. Connect to ground if
not used.
Pin 68 - GNDRY Analog Ground
This is the ground pin for the A/D converter of the Red or V
Chroma signal and must be connected to ground.
Note : All ground pins of the chip (i.e. 18,52,58,62,64,66,
and 68) must be connected together low resistive. The lay-
out of the PCB must take into consideration the need for a
low-noise ground.