HP L1950 User Manual (English)

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19" LCD Color Monitor HP L1950

Service

Horizontal Frequency

24- 83 kHz

TABLE OF CONTENTS

Description Page Description Page

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS

AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC

EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Table Of Contents.......……..............................…........1

Revision List.…........................................……......2

1. Monitor Specification..............................………........3

2. LCD Monitor Description…………………………….......4

3. Operation Instruction…………...............……...........5

3.1. General Instructions...........................…...........5

3.2. Control Button…………….…..............……...............5

3.3 Adjusting the Picture...........................…............6

4. Input/Output Specification............……………............10

4.1. Input Signal Connector............………….................10

4.2. Factory Preset Display Modes......…..................11

5. Panel Specification.....………………..................12

5.1. General Feature…….....………………..................12

5.2. Optical Characteristics………………………………14

6. Block Diagram……...................…………................16

6.1 Software Flow Chart………………………………...16

6.2.Electrical Block Diagram……………..….......18

7. Schematic……………......................................20

7.1 Main Board....……….......................................20

7.2 Power Board.….……....................................24

7.3 Key Board…………………………………………..28

7.4 USB Board…………………………………………29

8.PCB Layout..…….......................................30

8.1. Main Board………........................................30

8.2. Power Board….......................................32

8.3. Key Board………............….......................34

8.4 USB Board…………………………………………35

9. Maintainability……….......................................37

9.1. Equipments and Tools Requirement..............37

9.2. Trouble Shooting……….............................38

9.2.1 Main Board…………..............................38

9.2.2 Power Board………..............................40

9.2.3 Key Board…………..............................42

10 White-Balance, Luminance adjustment...43

11.Mechanical Instructions……………..…...….......45

12. Monitor Exploded View………………..…....….......51

13. BOM List………………………………..……………52

14. Different Parts List.........…………..........................66

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HP L1950 Specifications

General

3D	No
HD type	-
Panel type	TFT
Display surface	Matt
Display diagonal	19 \
Display resolution	1280 x 1024 pixels
Display technology	LCD
Vertical scan range	50 - 77 Hz
Horizontal scan range	24 - 83 kHz
Contrast ratio (typical)	800:1
Viewing angle, horizontal	160 °
Display brightness (typical)	300 cd/m²
Supported graphics resolutions	640 x 480 (VGA), 720 x 400, 800 x 600 (SVGA), 832 x 624, 1024 x 768 (XGA), 1152 x 870
Plug and Play	Yes
Tilt angle range	-5 - 35 °
Active display area (W x H)	378 x 303 mm
AC input voltage	90 - 256 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	2 W
Power consumption (typical)	30 W
USB hub version	2.0
HDMI ports quantity	0
USB Type-A downstream ports quantity	2
Product color	Silver
Country of origin	China

Weight and Dimensions

Bezel width (top)	18 mm
Depth (with stand)	301 mm
Height (with stand)	503 mm
Weight (with stand)	7400 g
Bezel width (bottom)	27 mm
Depth (without stand)	58 mm
Width (without stand)	414 mm
Height (without stand)	347 mm
Weight (without stand)	6500 g