Computer Tech Link 21dn manual Specifications, Factory Preset Timings, Troubleshooting

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SPECIFICATIONS

CDT Size

 

21-inch

 

 

 

 

 

Diagonal visible image area

20-inch

 

 

 

 

 

Dot Pitch

 

0.25 mm

 

 

 

 

 

 

Synchronization

 

Horizontal

30

- 107

KHz

 

 

 

 

 

 

 

 

Vertical

50

- 160

Hz

 

 

 

 

Plug and Play

 

DDC1/2B/CI

 

 

 

 

Power Saving

 

EPA, VESA DPMS, Nutek Compliant

 

 

 

 

 

Power Source

 

100-240

Vac, 50/60Hz (Free Voltage)

 

 

 

 

 

Power Consumption

 

135 W

 

 

 

 

Dimension-W x H x D

494 x 500 x 518mm

(set with stand)

 

 

 

 

 

 

 

Weight-unpacked (lbs/Kg)

61.7/28.0

 

 

 

 

Operating Temperature

10

~ 40°C /50 ~ 104°F

 

 

 

 

 

 

*This specification can be changed without any prior notice to improve the quality of the product.

FACTORY PRESET TIMINGS

Mode

Resolution

H.Freq(KHz)

V.Freq(Hz)

Remark

(dots X lines)

 

 

 

 

VGA 480

640

X 480

31.5

60

Non-interlaced

 

 

 

 

 

 

VGA 400

720

X 400

31.3

70

Non-interlaced

 

 

 

 

 

 

VESA 43K

640

X 480

43.0

85

Non-interlaced

 

 

 

 

 

 

VESA 46K

800

X 600

46.9

75

Non-interlaced

 

 

 

 

 

VESA SVGA 85

800 X 600

53.7

85

Non-interlaced

 

 

 

 

 

 

VESA 60K

1024

X 768

60.0

75

Non-interlaced

 

 

 

 

 

 

VESA 1024/85

1024

X 768

68.7

85

Non-interlaced

 

 

 

 

 

 

VESA 1280/75

1280

X 1024

80.0

75

Non-interlaced

 

 

 

 

 

 

VESA 1600/70

1600

X 1200

87.5

70

Non-interlaced

 

 

 

 

 

 

VESA 1280/85

1280

X 1024

91.1

85

Non-interlaced

 

 

 

 

 

 

VESA 1600/75

1600

X 1200

93.8

75

Non-interlaced

 

 

 

 

 

 

VESA 1600/85

1600

X 1200

106.3

85

Non-interlaced

 

 

 

 

 

 

TROUBLESHOOTING

 

Symptom

Check

 

 

 

 

 

No picture.

Check if power switch and computer power switch

 

 

are in the on position.

 

 

 

 

 

 

 

 

 

Check if the signal cable is correctly connected to

 

 

the video card.

 

 

 

 

 

 

 

 

 

Check if the pins of D subconnector are not bent.

 

 

 

 

 

 

 

 

 

Check if the computer is in the power- saving mode.

 

 

 

 

 

POWER LED is not

Check if power switch is in the on position.

 

lit.

 

 

 

 

 

 

 

Check if the power cord is correctly connected.

 

 

 

 

 

Image is unstable.

Check if the signal cable is suitable to the video card.

 

 

 

 

 

Image is not

Adjust H &V Size or H&V Center to get the proper

 

centered, too small

image.

 

or too large.

 

 

 

 

 

 

 

Picture bounces or a

Keep the devices that may cause electrical

 

wave pattern is

interference away from the monitor.

 

present in the

 

 

 

 

 

 

picture.

See the FCC information at the front cover of the

 

 

manual.

 

 

 

 

 

Color looks blotchy.

Operate Degauss once.

 

 

 

 

 

Picture is blurred.

Adjust Contrast and Brightness.

 

 

 

 

 

 

 

 

 

Operate Degauss once.

 

 

 

 

 

Edges of available

Adjust Geometry Control (Pincushion, Trapezoid..).

 

area on the screen

 

 

 

are not straight.

 

 

 

 

 

 

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Contents USER’S Guide Important Safeguards Introduction ContentsSetup Connecting the BNC Signal Cable Brightnesscontrast Operation & AdjustmentOSD Functions Self Diagnosis Specifications Factory Preset TimingsTroubleshooting Pin Signal Description for D-SUB Connector