HP L1950g - User Manual

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19" LCD Color Monitor HP L1950g

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…………………………………………..26

7.4 USB Board…………………………………………27

8.PCB Layout..…….......................................28

8.1. Main Board………........................................28

8.2. Power Board….......................................29

8.3. Key Board………............….......................31

8.4 USB Board…………………………………………32

9. Maintainability……….......................................33

9.1. Equipments and Tools Requirement..............33

9.2. Trouble Shooting……….............................34

9.2.1 Main Board…………..............................34

9.2.2 Power Board………..............................36

9.2.3 Key Board…………..............................38

10 White-Balance, Luminance adjustment...39

11.Mechanical Instructions……………..…...….......41

12. Monitor Exploded View………………..…....….......47

13. BOM List………………………………..……………48

14. Different Parts List.........…………..........................62

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HP L1950g Specifications

General

Panel type	TN
Pixel pitch	0.294 x 0.294 mm
Aspect ratio	5:4
Display diagonal	19 \
Separate H/V sync	Yes
Display resolution	1280 x 1024 pixels
Display technology	LED
Vertical scan range	50 - 77 Hz
Viewable size, vertical	303 mm
Contrast ratio (dynamic)	-
Contrast ratio (typical)	800:1
Display number of colors	16.78 million colors
Viewable size, horizontal	378 mm
Viewing angle, horizontal	160 °
Display brightness (typical)	300 cd/m²
USB hub version	2.0
HDMI ports quantity	0
USB Type-A downstream ports quantity	2
Product color	Silver
Country of origin	China
Pivot angle	0 - 90 °
Tilt angle range	-5 - 35 °
Cable lock slot type	Kensington
Panel mounting interface	100 x 100 mm
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	44 W
Power consumption (off)	1 W
Power consumption (standby)	2 W
Power consumption (typical)	32 W
Sustainability certificates	EPEAT Gold, ENERGY STAR

Weight and Dimensions

Depth (with stand)	301 mm
Weight (with stand)	7300 g
Depth (without stand)	58 mm
Width (without stand)	414 mm
Height (without stand)	347 mm
Weight (without stand)	4500 g