Service Manuals, User Guides, Schematic Diagrams or docs for : HP Monitor HP_L1940T_GM5321_R0_[SM]
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>> Download HP_L1940T_GM5321_R0_[SM] documenatation <<Text preview - extract from the document HP L1940T
SERVICE MANUAL
19" LCD Monitor
L1940T Series
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE
EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
1
HP L1940T
Table of Contents
Table of Contents ------------------------------------------------------------------------------------------------------------------------ 02
Revision List ------------------------------------------------------------------------------------------------------------------------------ 03
1.Monitor Specification ----------------------------------------------------------------------------------------------------------------04
2.LCD Monitor Description ------------------------------------------------------------------------------------------------------------05
3.Operation Instructions ---------------------------------------------------------------------------------------------------------------05
3.1 General Instructions ---------------------------------------------------------------------------------------------------------------05
3.2 Control Button ---------------------------------------------------------------------------------------------------------------------06
3.3 Adjusting The Picture --------------------------------------------------------------------------------------------------------------06
4. Input/Output Specification -------------------------------------------------------------------------------------------------------- 09
4.1 Input Signal Connector -----------------------------------------------------------------------------------------------------------09
4.2 Factory Preset Display Modes --------------------------------------------------------------------------------------------------11
4.3 Power Supply Requirements ----------------------------------------------------------------------------------------------------11
5.Panel Specification ---------------------------------------------------------------------------------------------------------------------12
5.1 General Feature --------------------------------------------------------------------------------------------------------------------12
5.2 Optical Characteristics ------------------------------------------------------------------------------------------------------------13
6.Monitor Exploded View -----------------------------------------------------------------------------------------------------------------14
7.Repair Flow Chart ---------------------------------------------------------------------------------------------------------------------15
8. Trouble Shooting -------------------------------------------------------------------------------------------------------------------18
9. Block Diagram --------------------------------------------------------------------------------------------------------------------19
10. Schematic ------------------------------------------------------------------------------------------------------------------------------20
10.1Main Board ----------------------------------------------------------------------------------------------------------------------20
10.2 Inverter/Power Board -------------------------------------------------------------------------------------------------------25
10.3 Key Board ------------------------------------------------------------------------------------------------------------------29
11. PCB Layout -----------------------------------------------------------------------------------------------------------------------------31
11.1 Main Board --------------------------------------------------------------------------------------------------------------------------31
11.2 Inverter/Power Board -------------------------------------------------------------------------------------------------------------32
11.3 Key Board ---------------------------------------------------------------------------------------------------------------------------33
12. Maintainability -------------------------------------------------------------------------------------------------------------------------34
13. White-Balance, Luminance Adjustment ------------------------------------------------------------------------------------ 35
14. Check List after replacing LCD Main board ---------------------------------------------------------------------------------37
14.1 Check white-balance -------------------------------------------------------------------------------------------------------------37
14.2 Steps for writing DDC ------------------------------------------------------------------------------------------------------------37
15. EDID Content --------------------------------------------------------------------------------------------------------------------------52
16. BOM List --------------------------------------------------------------------------------------------------------------------------5364
2
HP L1940T
Revision List
Revision Date Revision History TPV Model
A00 Feb.-24-06 Initial release T981KMVDBHHPNP
3
HP L1940T
1.Monitor Specifications
Driving system TFT Color LCD
Panel M190E5-L0A
Active Area 376.32(H) x 301.056(V) (19.0")
Pixel pitch 0.294( H )x 0.294mm( V )
LCD Panel Viewing Angles(Min / TYP) H:120/140; V:110/130
Response time (typ.) < 8 ms
Brightness 200 nits
Contrast 450:1
Video Analog /Digital
Sync. Type H/V TTL
Input
H-Frequency 30kHz
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