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HP LE1901w Service Manual

19" lcd color monitor.
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19" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents......................................................1
Revision List........................................................2
1. Monitor Specification..................................................5
2. LCD Monitor Description........................................6
3. Operation Instruction.................................................7
3.1. General Instructions.................................................7
3.2. Control Button.......................................................7
3.3 Adjusting the Picture...............................................8
4. Input/Output Specification........................................12
4.1. Input Signal Connector..........................................12
4.2. Factory Preset Display Modes................................12
5. Panel Specification..................................................13
5.1. General Feature..................................................13
5.2. Optical Characteristics.....................................15
5.3 Electrical Characteristics....................................19
6. Block Diagram.........................................................22
6.1 Software Flow Chart..........................................22
6.2. Electrical Block Diagram....................................24
7. Schematic.............................................................26
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

Page Description
7.1. Main Board.........................................................26
7.2. Power Board.......................................................31
7.3. Key Board...........................................................33
8. PCB Layout................................. ................ ..... ...34
8.1. Main Board.........................................................34
8.2. Power Board........................................................36
8.3. Key Board............................ .............................38
9. Maintainability......................................................39
9.2. Trouble Shooting................................................40
9.2.1. Main Board......................................................40
9.2.2. Power Board....................................................42
9.2.3. Key Board.......................................................44
11.Mechanical Instructions.....................................47
12. Monitor Exploded View...................................51
13. BOM List.....................................................52
14. Different Parts List..............................................58
SAFETY NOTICE
1
HP LE1901w
Horizontal Frequency
24- 83 kHz
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Table of Contents

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   Summary of Contents for HP LE1901w

  • Page 1: Table Of Contents

    19" LCD Color Monitor HP LE1901w Service Service Service Horizontal Frequency 24- 83 kHz TABLE OF CONTENTS Description Page Description Page 7.1. Main Board..………..........26 Table Of Contents..……......…..1 7.2. Power Board.….……..........31 Revision List.…........……..2 7.3. Key Board.….……..........33 1. Monitor Specification......…………..5 8. PCB Layout..……..........34 2.
  • Page 2: Revision List

    19" LCD Color Monitor HP LE1901w Revision List Version Date Revision History TPV Model Name T99GM5EBCXHPNNE T99GM5EBCXHPNCE T99GM5EKCXHPNNE T99GM5EKCXHPNCE Initial release T99SM5EBCXHPNNE (LGD LM190WX1-TLL1 Aug.-20-2009 SEC LTM190BT03 T99SM5EBCXHPNCE AUO M190PW01) T99SM5EKCXHPNNE T99SM5EKCXHPNCE T99AM5EBCXHPNNE T99AM5EBCXHPNCE T99AM5ETCXHPNNE T99GM5EACXHANNE T99SM5EACXHANNE Add new Models T99AM5EACXHANNE Mar.-19-2010...
  • Page 3 19" LCD Color Monitor HP LE1901w T99GM5EDCXHPNCE T99GM5EDCXHPNNE T99GM5ENCXHANCE T99GM5EPCXHPNCE T99GM5EPCXHPNNE T99GM5ETCXHPNCE T99MM5EBCXHPNCE T99MM5EDCXHPNCE T99MM5EDCXHPNNE T99MM5EKCXHPNCE T99MM5EPCXHPNCE T99MM5EPCXHPNNE T99MM5ETCXHPNCE T99MM5ETCXHPNNE T99SM5EACXHANCE T99SM5EBCXHFNCE T99SM5EBCXHFNNE T99SM5EDCXHPNCE T99SM5ENCXHANCE T99SM5EPCXHPNCE T99SM5EPCXHPNNE T99SM5ETCXHPNCE Sep.-26-2010 Add new Model T99GM5EDCXHPNNE T99SM5EQCXHPNNE T99GM5EQCXHPNNE T99MM5EQCXHPNNE T99MM5EQCXHPNCE T99KM5EQCXHPNNE T99SM5EQCXHPNCE Aug.-09-2011...
  • Page 4 19" LCD Color Monitor HP LE1901w T99GM5EQCXHFNNE T99KM5EQCXHFNCE T99KM5EQCXHFNNE Mar.-16-2012 Add new Models T99MM5EQCXHFNCE T99MM5EQCXHFNNE T99SM5EQCXHFNCE T99SM5EQCXHFNNE Apr.-23-2014 Add new Model T99GM5EDCXHPNCE...
  • Page 5: Monitor Specification

    19" LCD Color Monitor HP LE1901w 1. Monitor Specification...
  • Page 6: Lcd Monitor Description

    19" LCD Color Monitor HP LE1901w 2. LCD Monitor Description The LCD Monitor will contain main board, power board, a key board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.
  • Page 7: Operation Instruction

    19" LCD Color Monitor HP LE1901w 3. Operation Instructions 3.1 General Instructions Use the On-Screen Display (OSD) to adjust the screen image based on your viewing preferences. To access the OSD, do the following: 1. If the monitor is not already on, press the Power button to turn on the monitor.
  • Page 8: Adjusting The Picture

    19" LCD Color Monitor HP LE1901w 3.3 Adjust the Picture...
  • Page 9 19" LCD Color Monitor HP LE1901w...
  • Page 10 19" LCD Color Monitor HP LE1901w...
  • Page 11 19" LCD Color Monitor HP LE1901w...
  • Page 12: Input/output Specification

    19" LCD Color Monitor HP LE1901w 4. Input/Output Specification 4.1 Input Signal Connector D-SUB connector Signal Signal Red Video 3.3/+5 V (from PC) Green Video Sync Ground Blue Video None None DDC Data Ground (DDC Return) Horizontal Sync Red GND...
  • Page 13: Panel Specification

    19" LCD Color Monitor HP LE1901w 5. Panel Specification 5.1 General Feature LM190WX1-TLL1 LTM190BT03...
  • Page 14 19" LCD Color Monitor HP LE1901w M190PW01 M190A1-L0G...
  • Page 15: Optical Characteristics

    19" LCD Color Monitor HP LE1901w 5.2 Optical Characteristics M190WX1-TLL1...
  • Page 16 19" LCD Color Monitor HP LE1901w LTM190BT03...
  • Page 17 19" LCD Color Monitor HP LE1901w M190PW01...
  • Page 18 19" LCD Color Monitor HP LE1901w M190A1-L0G...
  • Page 19: Electrical Characteristics

    19" LCD Color Monitor HP LE1901w Electrical Characteristics 1.TFT LCD Module: LM190WX1-TLL1 LTM190BT03 M190PW01...
  • Page 20 19" LCD Color Monitor HP LE1901w M190A1-L0G Ta = 25 ± 2 ºC 2. Back Light Unit: LM190WX1-TLL1 LTM190BT03...
  • Page 21 19" LCD Color Monitor HP LE1901w M190PW01 M190A1-L0G Ta = 25 ± 2 ºC...
  • Page 22: Block Diagram

    19" LCD Color Monitor HP LE1901w 6. Block diagram 6. 1 Software Flow Chart...
  • Page 23 19" LCD Color Monitor HP LE1901w REMARK: 1) MCU initialize. 2) Is the EEprom blank? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed? 6) Clear all global flags.
  • Page 24: Electrical Block Diagram

    19" LCD Color Monitor HP LE1901w 6.2 Electrical Block Diagram 6.2.1 Scalar Board Crystal(14.31818MHz) Panel Interface (X401) (CN402) EPR_SDA EPR SCL Scalar TSUM1PLR-LF FLASH MEMORY (Include ADC、OSD、MCU) PM25LV010A (U401) (U402) H sync V sync EEPROM M24C04-WMN6TP D-Sub Connector (U403) (CN101)
  • Page 25 19" LCD Color Monitor HP LE1901w 6.2.2 Inverter / Power Board AC input Bridge Rectifier EMI filter Transformer Rectifier diodes and Filter Start Circuit CN902 Feedback Over Circuit Voltage Control IC Protect ON/OFF Transformer MOSFET Resonance Lamp Over ON/OFF Feedback...
  • Page 26: Schematic

    19" LCD Color Monitor HP LE1901w 7. Schematic 7.1 Main Board TSUM1PFR SCHEMATIC XGA/SXGA LVDS OUTPUT DSUB_R+ DSUB_R+ VCC1.8 DSUB_R- DSUB_R- DSUB_G+ DSUB_G+ VCC3.3 DSUB_G- DSUB_G- VCC1.8 DSUB_SOG DSUB_SOG CMVCC DSUB_B+ DSUB_B+ DSUB_5V DSUB_B- DSUB_B- VCC3.3 DSUB_H DSUB_H ESD_VCC DSUB_V...
  • Page 27 19" LCD Color Monitor HP LE1901w AVDD VDDP VDDC VCC3.3 VDDP AVDD U401 FB401 TSUM1PLR-LF VCTRL VCTRL 7 VCC3.3 300OHM LVA3P C401 C402 DSUB_R+ RIN0P LVA3M DSUB_R- RIN0M PA[0..1] 0.1uF/16V 0.1uF/16V DSUB_G+ PA[0..1] 6 GIN0P DSUB_G- GIN0M LVA2P DSUB_SOG SOGIN0...
  • Page 28 19" LCD Color Monitor HP LE1901w H_Sy nc R101 0R05 1/10W 5% R102 1K 1/16W 5% DSUB_H 5 V_Sy nc R103 1K 1/16W 5% FB101 DSUB_V 5 R104 C102 VGA_B+ DSUB_B+ 5 ESD_VCC R105 R106 C101 C103 BEAD 2K2 1/16W 5%...
  • Page 29 19" LCD Color Monitor HP LE1901w PA[0..1] PA[0..1] R434 has to be changed PANEL_VCC from 0805 to 1206 PA[4..9] PA[4..9] CN403 PANEL_VCC CN402 PB[0..9] C417 PB[0..9] R429 330 OHM 1/4W 0.1uF/16V For single channel CMVCC CMVCC 5,7 R430 C418 10K 1/16W 5% 0.1uF/16V...
  • Page 30 19" LCD Color Monitor HP LE1901w CMVCC CMVCC VOUT ADJ(GND) CN701 U702 NC VCC3.3 CMVCC CMVCC U701 BKLT_VBRI BKLT_VBRI 5 BKLT_EN VCC3.3 4,5 VOUT C701 C702 100UF16V 0.1uF/16V AP1117E33LA CONN C704 C703 0.1uF/16V 100UF16V CMVCC VCC3.3 Co-layout both 223 and 252...
  • Page 31: Power Board

    19" LCD Color Monitor HP LE1901w 7.2 Power Board D905 SR5150 D906 SR5150 R918 100 OHM 1/4W C912 0.001uF 1A(INVERTER) R919 100 OHM 1/4W +12V L903 3.5uH R920 100 OHM 1/4W ZD902 R946 GDJ13B R947 470OHM2W C915 T901 470UF/25V C916...
  • Page 32 19" LCD Color Monitor HP LE1901w +12V PT801 R817 Q805 10R 1/8W 5% POWER X'FMR G1 D1 ZD802 R816 GDZJ5.6B 10R 1/8W 5% R803 AO4620 5K1 1/8W 5% R804 ZD803 5K1 1/8W 5% GDZJ5.6B C815 0.1uF CN801 CONN R802 R819...
  • Page 33: Key Board

    19" LCD Color Monitor HP LE1901w 7.3 Key Board CN001 R003 3K 1/10W 1% LBADC1 R002 1.8K OHM 1% 1/10W LBADC2 DC_POWER_ON R001 3K 1/10W 1% LED_GRN LED_AMB CONN R004 0R05 1/8W SW001 SW002 SW003 SW004 SGND LBADC1 Plus (3K) 1.43V...
  • Page 34: Pcb Layout

    19" LCD Color Monitor HP LE1901w 8. PCB Layout 8.1 Main Board...
  • Page 35 19" LCD Color Monitor HP LE1901w...
  • Page 36: Power Board

    19" LCD Color Monitor HP LE1901w 8.2 Power Board...
  • Page 37 19" LCD Color Monitor HP LE1901w...
  • Page 38: Key Board

    19" LCD Color Monitor HP LE1901w 8.3 Key Board...
  • Page 39: Maintainability

    19" LCD Color Monitor HP LE1901w 9. Maintainability 9.1 Equipments and Tools Requirement 1. Multi-meter. 2. Oscilloscope. 3. Pattern Generator. 4. DDC Tool with a Compatible Computer. 5. Alignment Tool. 6. LCD Color Analyzer. 7. Service Manual. 8. User Manual.
  • Page 40: Trouble Shooting

    19" LCD Color Monitor HP LE1901w 9.2 Trouble Shooting 9.2.1 Main Board 1. No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section Measure U701 Pin2=3.3V...
  • Page 41 19" LCD Color Monitor HP LE1901w 2. No picture (LED is orange) No picture Measure U701 Pin2=3.3V Replace U701 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally...
  • Page 42: Power Board

    19" LCD Color Monitor HP LE1901w 9.2.2 Power Board 1. No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C905(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of U901...
  • Page 43 19" LCD Color Monitor HP LE1901w 2. W/LED No Backlight Check C804(+) =12V Check Q805 Check ON/OFF signal Check Interface board Check IC801 pin6/10=12V ? Change Q802 Check the pin1 of IC801 have saw tooth wave Change IC801 Check PT801 has the output of square wave at short time.
  • Page 44: Key Board

    19" LCD Color Monitor HP LE1901w 9.2.3 Key Board OSD is unstable or not working Is Keypad board connecting normally? Connect Keypad Board Is Button Switch normally? Replace Button Switch Replace Keypad Board Is Keypad board normally? Check main board...
  • Page 45: White-balance,luminance Adjustment

    6500K color temp. parameter is x = 313±15, y = 329 ±15, Y>250 cd/m 3. Into factory mode of HP L1908w Turn on power, press the down (+) button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
  • Page 46 19" LCD Color Monitor HP LE1901w B. Adjust sRGB color-temperature 1. Switch the chroma-7120 to sRGB channel. 2. The chroma 7120 will show x = 313 ±15, y = 329 ±15, Y >220 cd/m 3. Switch the chroma 7120 l to RGB MODE ( with press “MODE” button to change ) 4.
  • Page 47: Mechanical Instructions

    19" LCD Color Monitor HP LE1901w 11. Mechanical Instructions Step Figure Description Lay the monitor on a flat, soft Preparation and clean surface. Remove the decorate cover Remove the and the screws stand to remove the stand.
  • Page 48 19" LCD Color Monitor HP LE1901w Remove the Remove the back cover back cover Remove the Remove the bezel bezel...
  • Page 49 19" LCD Color Monitor HP LE1901w Remove the screws marked Remove the in red and to main frame remove the main frame...
  • Page 50 19" LCD Color Monitor HP LE1901w 1.Remove the screws marked in red to remove the Power Remove Boardand Main main board Board. and power 2.Disconnect board the connector and remove the Power Board and Main Board.
  • Page 51: Monitor Exploded View

    19" LCD Color Monitor HP LE1901w 12. Monitor Exploded View...
  • Page 52: Bom List

    Mainframe _LG_LE1901w H34G0015AAA 2B 30 REAR COVER_ASS'Y_LE1901W H40G 19N69040A LE1901w ID LABEL H40G 19N69041A LE1901w safety label 防盗标签 H40G 58169010A H41G160669058A LE1901w EU DOC KIT (532423-A22) H41G780669059B RTF CARD 407430-006 H41G780669068A SCREEN FLY (311618-008) H41G780669078A QSG(532422-B21) H44G9045101 EPS_LE1901w H44G9045201 EPS_LE1901w...
  • Page 53 19" LCD Color Monitor HP LE1901w SMTCR-U402 100GHMG9004W11 MCU ASS'Y-056G1133713 CN401 033G3802 6B Y WAFER CN701 033G3802 7B Y conn 2.0 7p CN402 033G801930F CH JS CONNECTOR 040G 45762412B CBPC LABEL CN101 088G 35315F XH D-SUB 15PIN VERTICAL CONN WITH SCREW...
  • Page 54 19" LCD Color Monitor HP LE1901w R413 061G0402101 JF RST CHIPR 100 OHM +-5% 1/16W FENGHUA R412 061G0402101 JF RST CHIPR 100 OHM +-5% 1/16W FENGHUA R410 061G0402101 JF RST CHIPR 100 OHM +-5% 1/16W FENGHUA R409 061G0402101 JF RST CHIPR 100 OHM +-5% 1/16W FENGHUA...
  • Page 55 19" LCD Color Monitor HP LE1901w C401 065G040210412K CAP CHIP 0402 0.1UF 16V X7R C402 065G040210412K CAP CHIP 0402 0.1UF 16V X7R C403 065G040210412K CAP CHIP 0402 0.1UF 16V X7R C404 065G040210412K CAP CHIP 0402 0.1UF 16V X7R C405 065G040210412K CAP CHIP 0402 0.1UF 16V X7R...
  • Page 56 19" LCD Color Monitor HP LE1901w R815 061G06037500FF RST CHIPR 750 OHM +-1% 1/10W FENGHUA R928 061G06037502FF RST CHIPR 75KOHM +-1% 1/10W FENGHUA R811 061G06038202FF RST CHIPR 82K OHM +- 1% 1/10W FENGHUA R810 061G06038202FF RST CHIPR 82K OHM +- 1% 1/10W FENGHUA...
  • Page 57 19" LCD Color Monitor HP LE1901w D803 093G 6433P BAV99 PW9921LHB1AI POWER BOARD FOR AI CN901 006G 31500 EYELET PT801 006G 31502 1.5MM RIVET U903 056G 158 10 T IC AS431AZTR-E1 TO-92 Q902 057G 530503 T 2SD1207T R903 061G152M10452T SY...
  • Page 58: Different Parts List

    Diversity of T99GM5EKCXHPNNE compared with T99GM5EBCXHPNNE Location Part No. Description Remark E08901 089G402A19N IS AC POWER CABLE H41G160669059A LE1901w NA DOC KIT (532423-DN2) Diversity of T99GM5EKCXHPNCE compared with T99GM5EBCXHPNNE Remark Location Part No. Description E08901 089G402A19N IS AC POWER CABLE...
  • Page 59 PANEL LTM190BT03 Q03 FQ SEC 2nd source 756GH9CB HP018 MCU ASS'Y SMTCR-U402 100GHMS9001W11 HP_LE1901w_SEC H15G0008 3101S Mainframe _SEC_LE1901w H41G160669059A LE1901w NA DOC KIT (532423-DN2) Diversity of T99AM5EBCXHPNNE compared with T99GM5EBCXHPNNE Location Part No. Description Remark 705GH934063 BEZEL ASS'Y LE1901W_SEC/AU H34G0044AAAA2B 30 BEZEL_LE1901W_SEC/AU...

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