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HP L1908w User Manual

HP L1908w
115 pages
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19" LCD Color Monitor HP L1908w / L1908wm / L1908wi
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..............................………........4
2. LCD Monitor Description…………………………….......7
3. Operation Instruction…………...............……................8
3.1. General Instructions...........................…....................8
3.2. Control Button…………….…..............……................8
3.3 Adjusting the Picture...........................…....................9
4. Input/Output Specification............…………….............13
4.1. Input Signal Connector............…………..................13
4.2. Factory Preset Display Modes......………................14
5. Panel Specification.....………………...........................15
5.1. General Feature…….....………………….................15
5.2. Optical Characteristics…………………..…………17
5.3 Parameter guide line for CCFL Inverter…………20
6. Block Diagram……...................…………................22
6.1 Software Flow Chart………………………………...22
6.2.Electrical Block Diagram……………..….......24
7. Schematic……………......................................26
8.PCB Layout..…….......................................35
8.1. Main Board………........................................35
8.2. Power Board….......................................37
9. Maintainability……….......................................40
9.1. Equipments and Tools Requirement..............40
9.2. Trouble Shooting………..............................41
10 White-Balance, Luminance adjustment...51
11. Monitor Exploded View………………..…....….......53
12. BOM List………………………………..……………54
13. Different Parts List…....................................66

Table of Contents

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HP L1908w Specifications

General IconGeneral
3DNo
Panel typeTFT
Pixel pitch0.285 x 0.285 mm
Display surfaceMatt
Display diagonal19 \
Separate H/V syncYes
Display resolution1440 x 900 pixels
Display technologyLCD
Native aspect ratio16:10
Vertical scan range50 - 76 Hz
Maximum refresh rate75 Hz
Horizontal scan range24 - 83 kHz
Viewable size diagonal482.5 mm
Viewable size, vertical256.7 mm
Contrast ratio (typical)1000:1
Display number of colors-
Viewable size, horizontal409.8 mm
Viewing angle, horizontal160 °
Display scanning frequencyHorizontal frequency: 24-83 kHz, Vertical frequency: 50-76 Hz
Display brightness (typical)300 cd/m²
Supported graphics resolutions1440 x 900 (WXGA+)
I/O portsVGA
HDMI ports quantity0
CertificationTCO 03, Taiwan Green Mark, CECP
Product colorBlack
Country of originChina
Tilt angle range-5 - 30 °
Cable lock slot typeKensington
Panel mounting interface100 x 100 mm
On Screen Display (OSD) languagesDEU, DUT, ENG, ESP, FRE, ITA, JPN
UNSPSC-code43211902
Audio includedNo audio included at platform level
Security featuresKensington Lock-ready
Power requirements100 - 240 VAC, 50 - 60 Hz
Multimedia connectionsOptional HP Flat Panel Speaker Bar: powered directly by the monitor or PC, the Speaker Bar attaches to the monitor's lower bezel to bring full audio support to select HP Flat Panel Monitors. Features include dual speakers with full sound range and external jack for headphones, part number EE418AA. For more information, refer to the product's Quick Specs. Optional HP Flat Panel Monitor Quick Release: an easy-to-use, VESA-compliant, flat panel monitor mounting solution that allows you to quickly and securely attach a flat panel monitor to a variety of stands, brackets, arms or wall mounts, part number EM870AA. For more information, refer to the product's Quick Specs.
Recommended resolutionPreset VESA Graphic Modes (non-interlaced): 1280 x 1024 @ 60 and 75 Hz, 1024 x 768 @ 60 and 75 Hz, 1152 x 870 @ 75 Hz (Mac), 1152 x 900 @ 66 Hz (Sun), 832 x 624 @ 75 Hz (Mac), 800 x 600 @ 60 and 75 Hz, 720 x 400 @ 70 Hz, 640 x 480 @ 60 and 75 Hz
Active display area (W x H)409.8 x 256.7 mm
AC input voltage100 - 240 V
AC input frequency50 - 60 Hz
Power consumption (max)50 W
Power consumption (off)1 W
Power consumption (standby)2 W
Power consumption (typical)37 W
Operating altitude0 - 3658 m
Non-operating altitude0 - 12192 m
Storage temperature (T-T)-34 - 60 °C
Operating temperature (T-T)5 - 40 °C
Storage relative humidity (H-H)5 - 95 %
Operating relative humidity (H-H)20 - 80 %
Non-operating relative humidity (non-condensing)5 - 90 %
Package depth174 mm
Package width536 mm
Package height423 mm
Package weight6450 g
Sustainability certificatesEPEAT Silver, ENERGY STAR
Cables includedAC, VGA
Power cable length1.9 m
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)187 mm
Width (with stand)446 mm
Height (with stand)370 mm
Weight (with stand)5100 g
Depth (without stand)59 mm
Height (without stand)301 mm
Weight (without stand)4200 g

Summary

1. Monitor Specification

2. LCD Monitor Description

Monitor Block Diagram

Diagram illustrating the monitor's block structure.

3. Operation Instructions

3.2 Control Button

Explanation of the monitor's control buttons.

3.3 Adjust the Picture

Guide to adjusting picture settings.

4. Input/Output Specification

4.1 Input Signal Connector

Information about the input signal connectors.

5. Panel Specification

5.1 General Feature

General features of the panel.

5.2 Optical Characteristics

Optical properties and measurements of the panel.

5.3 Parameter guide line for CCFL Inverter

6. Block diagram

6. 1 Software Flow Chart

Flowchart illustrating the monitor's software logic.

6.2 Electrical Block Diagram

Electrical block diagram of the monitor's circuitry.

6.2.2 Inverter / Power Board

Block diagram for the inverter and power board.

7. Schematic

8. PCB Layout

8.1 Main Board

PCB layout for the main board.

8.2 Power Board

PCB layout for the power board.

9. Maintainability

9.1Equipments and Tools Requirement

List of required equipment and tools for maintenance.

9.2 Trouble Shooting

Guidance for troubleshooting common monitor issues.

9.2.1 No. display of screen (Screen is black, color of LED is amber)

9.2.2 Nothing display on screen is black, color of LED is green

9.2.3 Checking the backlight unit

9.2.4 Abnormal screen

9.2.5Abnormal OSD screen, OSD adjustment problem

9.2.7 Checking the interface circuit of sync signal

9.2.8 Checking the resolution changed IC movement

9.2.9 Checking the DC/DC converter circuit

9.2.10 No power on

9.2.11 Checking inverter board circuit

9.2.12. Abnormal Audio Output

10. White- Balance, Luminance Adjustment

11. Monitor Exploded View

12. BOM List

13. Different Parts List

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