Manuals / Apple / TV and Video / Home Theater Screen

Apple 20 manual Microprocessor Board

Models: 20

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Troubleshooting Characteristics Error messages Symptom Charts Video Input Signals Reset a Speciﬁc Control AC Inlet Assembly Adjustments Eeprom Settings Checklist

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Basics	EEPROM Settings - 12

Microprocessor Board

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Contents

Apple Multiple Scan 20 Display Basics Overview Version Differences Multiple Scan 20 Display Monitor Distortion Ideal Raster Raster Shifted Up Left Right Environmental Inﬂuences Basics Troubleshooting Page Basics Eeprom Settings Microprocessor Board Speciﬁcations Picture Tube Characteristics Video Input Signals Controls and Ports Physical and Electrical Power Supply Monitor Stand Environmental Temperature Troubleshooting General First Checklist CRT raster will not always resemble a perfect rectangle CRTs rarely fail Connect the Hardware Display Setting RestorationPage Save the Eeprom Information Install the Microprocessor Board Restore the Eeprom Information Page Raster Symptom Charts Raster Raster Power Indicator Lights TroubleshootingSymptom Charts/Indicator Lights Indicator Lights Indicator Lights Miscellaneous Miscellaneous Troubleshooting Symptom Charts/Miscellaneous Take Apart Rear Cover Take Apart Bezel Take Apart Bezel Remove the grounding Screw Take Apart Bezel Remove the four large EMI Shield Take Apart Take Apart CRT/Video Board Take Apart CRT/Video Board B Cables CN302 CN301 CN303 CN304 CN701 CN702 Clip to the CRT/video CRT FV1 Cable FV2 Cable Power Supply GroundCN602 Strap CN603 CN604 CN1601 CN1600 Plastic Cable Clips Securing the power Take Apart Power Supply Disconnect connector CN601 Fuse Fuse Holder Focus VR Control Vidf Hidf Focus Control AC Inlet Assembly CN1601 CN1600 Screw AC Inlet Assembly Serial I/O Board Remove the two screws Replacement Note Video Cable B Cables CN253 Remove the plastic cable clip Rear Panel ScrewScrew Main Deflection Board Take Apart Main Deflection Board CN253 CN254 Serial I/O Board CN250 B Cables CN302 CN303 Securing the video cable Page Page Page Screw Important Before you MicroprocessorPage Take Apart Microprocessor Board Important Make sure you Tilt/Swivel Assembly Side of the tilt/swivel Control Panel Page Clip ADB Board Page Adjustments Brightness Contrast Brightness Contrast Geometry Vertical Center Horizontal Center Vertical Size Horizontal Size Rotation and Color Uniformity Page Shape Convergence Vertical Convergence Horizontal Convergence Color Temperature Page Adjustments Color Temperature Adjustments Color Temperature Factory Settings Recall Reset a Speciﬁc Control Reset All Controls Exploded View Exploded View