HP L1740 Service Manual

17" LCD Color Monitor HP L1740
1
Service
Service
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............……………............7
4.1. Input Signal Connector............………….................7
4.2. Factory Preset Display Modes......…..................8
4.3. Power Supply Requirements...............................8
5. Panel Specification.....………………..................9
5.1. General Feature…….....………………..................9
5.2. Optical Characteristics………………………………9
6. Block Diagram……...................…………................10
6.1 Software Flow Chart………………………………...10
6.2.Electrical Block Diagram……………..….......12
7. Schematic……………......................................14
7.1 Main Board....……….......................................14
7.2 Power Board.….……....................................18
8.PCB Layout..…….......................................20
8.1. Main Board………........................................20
8.2. Power Board….......................................23
8.3. Key Board………............….......................26
9. Maintainability……….......................................27
9.1. Equipments and Tools Requirement..............27
9.2. Trouble Shooting………..............................28
9.2.1 Main Board…………..............................28
9.2.2 Power Board………..............................30
9.2.3 Key Board…………..............................32
10 White-Balance, Luminance adjustment...33
11.Mechanical Instructions……………..…...….......35
12. Monitor Exploded View………………..…....….......39
13. BOM List………………………………..……………40
14. Different Parts List…....................................54

HP L1740 Specifications

General

3D	No
Response time	8 ms
Display diagonal	17 \
Display resolution	1280 x 1024 pixels
Viewing angle, vertical	135 °
Contrast ratio (dynamic)	-
Contrast ratio (typical)	500:1
Display number of colors	16.78 million colors
Viewing angle, horizontal	150 °
Digital vertical frequency	56 - 76 Hz
Digital horizontal frequency	30 - 83 kHz
Display brightness (typical)	300 cd/m²
Supported graphics resolutions	720 x 400, 832 x 624, 1152 x 870, 1024 x 768 (XGA), 1360 x 768 (WXGA), 640 x 480 (VGA), 800 x 600 (SVGA)
USB hub version	2.0
DVI-I ports quantity	0
Cable lock slot type	Kensington
Panel mounting interface	100 x 100 mm
Power consumption (max)	60 W
Power consumption (average)	33 W
Power consumption (standby)	2 W
Power consumption (typical)	40 W
Product color	Black, White
Country of origin	China
Package weight	8800 g
Sustainability certificates	ENERGY STAR

Weight and Dimensions

Depth (with stand)	248 mm
Height (with stand)	490 mm
Weight (with stand)	7000 g
Depth (without stand)	62 mm
Width (without stand)	371 mm
Height (without stand)	315 mm
Weight (without stand)	3760 g