Apple Multiple Scan 20 Display Specifications download pdf (Page 39)

Troubleshooting Symptom Charts/Miscellaneous - 18

Miscellaneous

Picture dim;

adjusting front panel

controls does not

increase brightness

1 Ensure that screen does not face a window or other source of

ambient light. This type of environment gives screen a dim

appearance.

2 Replace CRT/video board.

Picture has vertical

jitter

1 Move monitor to different location and see if symptom

persists.

Note:

This symptom is often caused by electromagnetic

interference (electronic devices, fluorescent lights, power

lines, etc.) Refer to “First Checklist” in this chapter.

2 Replace main deflection board.

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 121 122

Apple Multiple Scan 20 1
Version Differences 3
Multiple Scan 20 Display 4
Monitor Distortion 5
Ideal Raster 6
Raster Shifted Up 6
Environmental Inﬂuences 7
Basics - 7 8
Basics - 10 11
EEPROM Settings 12
Basics EEPROM Settings - 12 13
Speciﬁcations 14
Characteristics 15
Video Input Signals 16
Requirements 16
Controls and Ports 17
Physical and Electrical 18
Monitor Stand 19
Environmental 20
Troubleshooting 21
First Checklist 23
CRTs rarely fail 25
Display Setting Restoration 26
Save the EEPROM Information 28
Symptom Charts 31
Indicator Lights 35
Miscellaneous 39
Take Apart 42
Rear Cover 43
Take Apart Bezel - 4 46
1 Remove the grounding 46
Hex Head Screw 47
EMI Shield 48
CRT/Video Board 51
NTC Connector 52
Ground Strap 52
R,G,B Cables 53
Video Cable Clip 55
Mounting Screw 56
FV1 Cable 57
FV2 Cable 57
Plastic Cable Clip 57
Power Supply 58
Plastic Cable Clips 60
Ground Strap Screw 61
Take Apart Power Supply - 20 62
8 Disconnect connector 62
Fuse Holder 64
Focus VR Control 65
VIDF Cable 66
MV Cable 66
HIDF Cable 66
AC Inlet Assembly 68
AC Inlet 70
Assembly 70
Serial I/O Board 71
Video Cable 74
Rear Panel 77
Take Apart Video Cable - 36 78
8 Remove the two screws 78
9 Remove the video cable 78
Main Deflection 79
±Warning: This product 79
Plastic Clip 80
10 Remove the cables from 86
Microprocessor 88
±Warning: Never use a 89
Tilt/Swivel 91
Assembly 91
Control Panel 93
ADB Board 96
Adjustments 98
Brightness and 99
Brightness 100
Contrast 101
Geometry 102
Vertical Center 103
Horizontal Center 104
Vertical Size 105
Horizontal Size 106
Uniformity 107
Rotation and Color 107
Convergence 110
Vertical Convergence 111
Horizontal 112
Color Temperature 113
Factory Settings 117
Reset a Speciﬁc 119
Reset All Controls 120
Exploded View 121
Exploded View 1 122

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Apple Multiple Scan 20 Display Specifications Page 39

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