Compaq Portable 286 Compaq Portable Computer, Compaq Plus Personal Computer, a - Page 128

adjustment is necessary. Using a plastic adjustment tool, adjust

Get Compaq Portable 286 - Notebook PC PDF manuals and user guides View all Compaq Portable 286 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 128 highlights

7. Using the label on the high voltage access plate as a guide, locate and adjust the BRITE control until the screen raster appears on the display. Check this display to make sure it is not tilted in any way. NOTE: Do not use excessive force when making adjustments on the video display unit. 8. Turn the BRIGHTNESS control knob until the raster disappears. 9. Using the VDU alignment procedure contained in the DIAGNOSTICS program, fill the display screen with a character (see Chapter 4, "DIAGNOSTIC Procedures," for more information on the VDU alignment test screen). 10. Using a plastic adjustment tool, turn the WIDTH adjustment potentiometer (pot) until the left and right edges of the display screen fall within the range specified on the adjustment template. Width may change between high and low resolution mode and should be adjusted for a good compromise. NOTE: When making adjustments on the video display unit do not use excessive force. 11. If the characters on your display appear blurry or fuzzy, a focus adjustment is necessary. Using a plastic adjustment tool, adjust the pot labeled FOCUS until all characters are clear and sharp. 12. If the characters on your display appear too short or too tall, a character height adjustment is necessary. Using the VDU adjustment diagnostic program, fill the screen with capital Es. 13. Two adjustments control the character height. The first is the MASTER HT control pot, which controls the height of characters in both the high and low resolution text mode. NOTE: Do not use excessive force when making adjustments on the video

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
7. Using the label on the high voltage access plate as a guide, locate and
adjust the BRITE control until the screen raster appears on the display.
Check this display to make sure it is not tilted in any way.
NOTE: Do not use excessive force when making adjustments on the video
display unit.
8. Turn the BRIGHTNESS control knob until the raster disappears.
9. Using the VDU alignment procedure contained in the DIAGNOSTICS program,
fill the display screen with a character (see Chapter 4, "DIAGNOSTIC
Procedures," for more information on the VDU alignment test screen).
10. Using a plastic adjustment tool, turn the WIDTH adjustment potentiometer
(pot) until the left and right edges of the display screen fall within
the range specified on the adjustment template. Width may change between
high and low resolution mode and should be adjusted for a good
compromise.
NOTE: When making adjustments on the video display unit do not use
excessive force.
11. If the characters on your display appear blurry or fuzzy, a focus
adjustment is necessary. Using a plastic adjustment tool, adjust the
pot labeled FOCUS until all characters are clear and sharp.
12. If the characters on your display appear too short or too tall, a
character height adjustment is necessary. Using the VDU adjustment
diagnostic program, fill the screen with capital Es.
13. Two adjustments control the character height. The first is the MASTER HT
control pot, which controls the height of characters in both the high
and low resolution text mode.
NOTE: Do not use excessive force when making adjustments on the video