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Text excerpt from page 102 (click to view)
PDP-503CMX, PDP-503MXE, PDA-5002
6.3 ADJUSTMENT
6.3.1 Video Card Adjustment
� Adjust after controlling each IC. � Perform it from step 1 to step 6 every each input signal.
NTSC PAL SECAM 443NTSC INPUT4 PALM PALN NTSC PAL
INPUT3
Step
Adjustment Item
Input Signal
Control
Measuring Point
Adjusting Value
Adjusting Method
Adjust Level so that the peak to peak of waveform becomes 700 mVp-p.
1
Y Level Adjustment (IC7130)(SA83)
RAMP
IC7302
CN7401-pin 3 700mVp-p
a 700mVp-p
a: Adjust Offset so that the pedestal level becomes fixed. b: Adjust Level so that the peak to peak of waveform becomes 525 mVp-p. 2 R-Y Offset Adjustment (IC7130)(SA88) Color-Bar IC7302 CN7401-pin 7 525mVp-p b a 525mVp-p
a: Adjust Offset so that the pedestal level becomes fixed. b: Adjust TINT so that the height ratio of each stair step waveform becomes fixed. c: Adjust Level so that the peak to peak of waveform becomes 525 mVp-p. b b b a c 525mVp-p
4
Adjustment (IC7130)(SA80)
a: Adjust Offset so that the pedestal level becomes fixed. b: Adjust Level so that the peak to peak of waveform becomes 525 mVp-p. 5 R-Y Level Adjustment (IC7103) (SA101) Color-Bar IC7103 CN7401-pin 7 525mVp-p b a 525mVp-p
6
B-Y Level Adjustment (IC7103) (SA100)
Color-Bar
IC7103
a: Adjust Offset so that the pedestal level becomes fixed. b: Adjust TINT so that the height ratio of each stair step waveform becomes fixed. c: Adjust Level so that the peak to peak of waveform becomes 525 mVp-p. b CN7401-pin 5 525mVp-p b b c a 525mVp-p
Each adjustment value which adjusted, store the adjustment data in IC7104.
