HP LP2275w Service Manual

22" LCD Color Monitor HP LP2275w
1
Service
Service
Service
Horizontal Frequency
30- 93 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……………………….......5
3. Operation Instruction…………..............……...........6
3.1.General Instructions.........................….............6
3.2. Control Button…………….….........……...............6
3.3 Adjusting the Picture...........................…............7
4. Input/Output Specification......……………............12
4.1. Input Signal Connector............………................12
4.2. Factory Preset Display Modes......…..................15
4.3. Power Supply Requirements..............................15
5. Panel Specification.....………………..................16
5.1.General Feature…..........................................16
5.2. Optical Characteristics…………………………17
6. Block Diagram……...................………................18
6.1 Software Flow Chart……………………………...18
6.2. Electrical Block Diagram……………..….......20
7. Schematic……………......................................22
7.1 Main Board..……….......................................22
7.2 Power Board.…….……....................................31
7.3 Inverter Board……………………………………33
7.4 Key Board.……..……....................................35
8.PCB Layout…...…….......................................36
8.1.Main Board………........................................36
8.2 Inverter Board.................................................38
8.3.Power Board…................................................39
8.4.Key Board………............….......................40
8.5.USB Board………............….......................41
9. Maintainability……….......................................42
9.1.Equipments and Tools Requirement..............42
9.2.Trouble Shooting………..............................43
10.White-Balance, Luminance adjustment...49
11.Mechanical Instructions………….…...….......51
12.Monitor Exploded View…….…………....….......56
13.BOM List……………….…………………………58
14. Different Parts List………………………………86

HP LP2275w Specifications

General

3D	No
Panel type	PVA
Pixel pitch	0.282 x 0.282 mm
Response time	6 ms
Display diagonal	22 \
Display resolution	1680 x 1050 pixels
Display technology	LCD
Vertical scan range	48 - 85 Hz
Horizontal scan range	30 - 93 kHz
Contrast ratio (typical)	1000:1
Display number of colors	-
Display brightness (typical)	300 cd/m²
Supported graphics resolutions	1280 x 1024 (SXGA), 1440 x 900 (WXGA+), 640 x 480 (VGA), 800 x 600 (SVGA)
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 %
Non-operating relative humidity (non-condensing)	5 - 90 %
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	85 W
Power consumption (standby)	2 W
Power consumption (typical)	56 W
Plug and Play	Yes
Tilt angle range	-5 - 30 °
Height adjustment	100 mm
Cable lock slot type	Kensington
Panel mounting interface	100 x 100 mm
USB hub version	2.0
HDMI ports quantity	0
USB Type-A downstream ports quantity	4
Product color	Black
Country of origin	China
Dimensions (W x D x H) (imperial)	19.9 x 10 x 18.8 \
Package weight	11300 g

Weight and Dimensions

Depth (with stand)	253 mm
Width (with stand)	506 mm
Height (with stand)	477 mm
Depth (without stand)	82.6 mm
Height (without stand)	328 mm
Weight (without stand)	8500 g