Philips DPTV400 Series, Training Manual

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FIGURE 22 - YUV TO Y Pb Pr CONVERTER
YUV to Y Pb Pr Converter (Figure 22)
To obtain the proper color match, the input of the A/D converted on the HD_DW panel must be in
the Y Pb Pr format. To accomplish this, the UV (Blue Red) signals must be phase inverted.
The Y or Luminance signal is buffered by transistor 7207. The Y_IN labeled signal from the SSB is
matched to a lower impedance by 7207. The output is labeled as Y_YUV.
The V_IN or Red signal is inverted by Transistor 7203 and buffered by Transistor 7202. The output
is labeled as PR_YUV.
The U_IN or Blue signal is inverted by Transistor 7205 and buffered by Transistor 7204. The output
is labeled as PB_YUV.
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