SANYO DVD-HP58 Repair Manual

IC BLOCK DIAGRAM & DESCRIPTION
IC201 IR3Y31M(VIDEO PROCESSING)
Term. No. Term. Name Voltage Description
31. GAMMA2 1.5V Adjusts the inflection point (72) on the DC
Voltage gain of the gamma correction.
This terminal is preset inside the IC.

32. BRIGHT The DC Voltage applied to this terminal
Adjusts the brightness of RGB outputs.
Gamma correction curve doesn)t link this
Terminal voltage.
33. S/H Input the sampling pulse for RB output
PULSE R Delay circuit.
34. S/H "High": hold
PULSE G "Low": sample
35. S/H "ALL Low": No delay
PULSE B Vth=1.5V
36. SYNC IN The rising edge of this input pulse. Must be
Before the fall edge of the SYNC OUT pulse.
In the case of PAL mode.
Inner flip-flop switches at the rising of the
Input pulse.
37. SYNC OUT Outputs the sync signal separated by the
Sync separated by the sync separator Circuit.
The output is provided by an open collector.
This output signal goes "High" level when
In sync and "Low" level when out of sync.
38. SYNC SEP 1.8V Inputs the video signal to the sync separator
Circuit. Input the H FILTER output signal.
39. EXT B IN The input terminal of the external analog RGB
40. EXT G IN signal.
41. EXT R IN The coupling capacitor works as a pedestal
Clamp capacitor.
42. CONTRAST The DC voltage applied to this terminal adjusts
the contrast of R.G.B. output.
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