Philips S37SD-YD02 Service Manual page 68

EN 68 8.
8.8 Alignments 50" HD v4
1. Get Pattern to be Full White(jumper CN2012 on Logic Brd).
2. Check the waveform using Oscilloscope.
• Triggering through V_TOGG of LOGIC Board.
• Connect the CN5511 Test Point at the Y_buffer to
other channel, and then check the first SF operating
waveform of 1TV-Field.
ComPair
Adjust VR5000 to set the time of
Yrr (Main Reset Rising Ramp)
SDI PDP Alignments
CN2012
Figure 8-44 Jumper CN2012 / ComPair connector on v4 Logic board
1 st Sub Field
90 us
Figure 8-45 TCP ramp waveform inclination adjustment (Y-Board)
• Check the waveform as before by adjusting Horizontal
Division. Check the Reset waveform when the
V_TOGG Level is changed.
• Set the Rising Ramp Flat Time to 90 µs by adjusting
VR5000.
• Set the Falling maintenance time to 80 µs by adjusting
VR5001.
Adjust VR5001 to set the time of
Yfr (Main Reset Falling Ramp) 80 us
F_14991_052.eps
081105
F_14991_020.eps
030805