Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-37General TroubleshootingCheck Drum MenuUses the sine and cosine sum data to determine the characteristics of theencoder disk and encoder sensors.Y-Axis EncoderR# DefinitionTypicalValue(8400)TypicalValue (8500/8550/8560) Actions0 Sin Sum DataOffset (sin sumunits)150000 to800000-68000 to160000Reports average of the maxand min Sin Sum averageamplitude values.1 Sin Sum DataAmplitude (sin sumunits)-11000 to350000-68000 to160000Reports difference between themax and min Sin Sum averageamplitude values.2 Amplitude Ripple(Sun Sum units)25 to 75 2.0 to 12 Reports the ripple in the SinSum amplitude values.Excludes the neighborhood ofthe Home notch (a distance of+/- 50 samples from the Homenotch min location.3 Max PositionRipple (mpts)-140000 to27500024000 to52000Reports the max variation inthe reported delta positionbetween samples over therevolution.4 Sin max deltaposition-.3 to 5 -.3 to 5 Reports the max value of thediference between the rotationposition of any adjacent sinsum peaks5 Home Notch DepthRatio (none)0 to 13 68 to 80 Reports the ratio between thenotch bottom amplitude andthe max amplitude value asreflected in the Sin Sum data.6 Home Notch Width(sec)50 to 90 720 to 960 Reports the width of the Homenotch at 99% full depth asreflected in the Sin Sum data.7 Home NotchSymmetry (none)250 to 550 35 to 65 Reports the ratio of the Homenotch width sections asbisected by a vertical from thenotch min as reflected in theSin Sum data.8 Cosine Sum DataOffset (cosine sumunits)90000 to450000-125000 to200000Reports average of the maxand min Cosine Sum averageamplitude values.9 Cosine Sum DataAmplitude (cosinesum units)300000 to500000300000 to500000Reports difference between themax and min Cosine Sumaverage amplitude values.
