HP LE1851w User Manual

18.5" LCD Color Monitor HP LE1851w
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............……………...........10
4.1. Input Signal Connector............…………................10
4.2. Factory Preset Display Modes......…..................10
5. Panel Specification.....………………..................11
5.1. General Feature…….....………………..................11
5.2. Optical Characteristics………………………………11
5.3 Parameter guide line for CCFL Inverter……………..13
6. Block Diagram……...................…………................15
6.1 Software Flow Chart………………………………...15
6.2.Electrical Block Diagram……………..….......17
7. Schematic……………......................................19
7.1 Main Board....……….......................................19
7.2 Power Board.….……....................................24
7.3 Key Board…………………………………………..26
8.PCB Layout..…….................................. ........ ..... ...27
8.1. Main Board………........................................27
8.2. Power Board….......................................28
8.3. Key Board………............….......................30
9. Maintainability……….......................................31
9.1. Equipments and Tools Requirement..............31
9.2. Trouble Shooting……….............................32
9.2.1 Main Board…………..............................32
9.2.2 Power Board………..............................34
9.2.3 Key Board…………..............................36
10 White-Balance, Luminance adjustment...37
11.Mechanical Instructions……………..…...….......39
12. Monitor Exploded View………………..…....….......42
13. BOM List………………………………..……………43
14. Different Parts List.........…………..........................53

HP LE1851w Specifications

General

3D	No
Pixel pitch	0.3 x 0.3 mm
Aspect ratio	16:9
Display diagonal	18.5 \
Display resolution	1366 x 768 pixels
Viewing angle, vertical	160 °
Contrast ratio (typical)	1000:1
Display number of colors	-
Display brightness (typical)	250 cd/m²
Supported graphics resolutions	720 x 400, 832 x 624, 1024 x 768 (XGA), 1280 x 720 (HD 720), 1360 x 768 (WXGA), 640 x 480 (VGA), 800 x 600 (SVGA)
Package depth	140 mm
Package width	512 mm
Package height	420 mm
Package weight	5100 g
Product color	Black
Country of origin	China
Market positioning	Business
Plug and Play	Yes
LED indicators	Power
Tilt angle range	-5 - 25 °
Panel mounting interface	100 x 100 mm
Storage temperature (T-T)	20 - 60 °C
Operating temperature (T-T)	5 - 35 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	20 - 80 %
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (off)	1 W
Power consumption (standby)	2 W
Power consumption (typical)	31 W
Dimensions (W x D x H) (imperial)	17.6 x 2.3 x 10.6 \
DVI-D ports quantity	0

Weight and Dimensions

Depth (with stand)	190 mm
Height (with stand)	341 mm
Depth (without stand)	58 mm
Width (without stand)	446 mm
Height (without stand)	269 mm
Weight (without stand)	3800 g