HP F1905E Series Service Manual
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HP F1905E Series Service Manual

HP F1905E Series Service Manual

19" lcd monitor
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HP F1905E
SERVICE MANUAL
19〞LCD Monitor
F1905E 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.

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  • Page 1 HP F1905E SERVICE MANUAL 19〞LCD Monitor F1905E 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...

  • Page 2: Table Of Contents

    HP F1905E Table of Contents Table of Contents ---------------------------------------------------------------------------------- 02 Revision List ---------------------------------------------------------------------------------------- 1.Product Feature -------------------------------------------------------------------------------- 2.LCD Monitor Description ----------------------------------------------------------------------- 3.Operation Instructions -------------------------------------------------------------------------- 3.1 General Instructions ----------------------------------------------------------------------- 3.2 Control Button ------------------------------------------------------------------------------- 3.3 Adjusting The Picture --------------------------------------------------------------------- 4. Input/Output Specification ---------------- --------------------------------------------------- 4.1 Input Signal Connector --------------------------------------------------------------------09...
  • Page 3 HP F1905E 7. Schematic -----------------------------------------------------------------------------------------19 7.1 Main Board -----------------------------------------------------------------------------------19 7.2 Inverter/Power Board -------------------------------------------------------------------23 8. PCB Layout ---------------------------------------------------------------------------------------26 8.1 Main Board -----------------------------------------------------------------------------------26 8.2 Inverter/Power Board ----------------------------------------------------------------------27 Keypad Board -----------------------------------------------------------------------------30 9. Maintainability ------------------------------------------------------------------------------------31 9.1 Equipments and Tools Requirements -------------------------------------------------31 9.2 Trouble Shooting ---------------------------------------------------------------------------32 9.2.1...

  • Page 4: Revision List

    HP F1905E Revision List Revision Date TPV model name May.-09-06 T986KAVDKHHPAP...

  • Page 5: Product Feature

    HP F1905E 1. Product Feature 48.3 cm (19”) a-si TFT Active matrix LCD panel, 0.294mm dot pitch Scalar chipset: Genesis GM5321 Microprocessor controlled scan technology Both VGA analog and DVI-D digital signal video inputs supported 450:1 Typical Contrast Ratio and 250-nits typical Brightness...

  • Page 6: Operation Instructions

    HP F1905E 3. Operation Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located on the side of the front panel. By changing these settings, the picture can be adjusted to your personal performance.

  • Page 7: Control Button

    HP F1905E 3.2 Control Buttons...

  • Page 8: Adjusting The Picture

    HP F1905E 3.3 Adjust the Picture Brightness Adjust the brightness. Contrast Adjust the contrast Adjust the: Auto Adjustment: Adjusts the main settings and produces a stable, centered image. Image H-Position: horizontal position of the screen image. Control V-Position: vertical position of the screen image.

  • Page 9: Input/Output Specification

    HP F1905E 4. Input/Output Specification 4.1 Input Signal Connector 4.1.1 Analog D-SUB Connector MNEMONIC SIGNAL MNEMONIC SIGNAL Red Video +5 V +5 V (from PC) Green Video Sync Ground Blue Video None (Reserved for Factory Use) None DDC Data Ground (DDC Return)

  • Page 10: Factory Preset Display Modes

    HP F1905E DVI-D digital connector layout 4.2 Factory Preset Display Modes Factory Pre-set Video Input Modes Horizontal Vertical Frequency Pre-set Pixel Format Frequency (kHz) (Hz) 640 x 480 31.5 60.0 640 x 480 37.9 72.0 640 x 480 37.5 75.0 720 x 400 31.5...

  • Page 11: Power Supply Requirements

    HP F1905E 4.3 Power Supply Requirements PARAMETER RANGE AC Input Voltage 90 to 265V AC Input Frequency 47 to 63 Hz Inrush Current 50A MAX AT 220VAC and 30A AT 120VAC Leakage Current 5 mA MAX at 120VAC Power consumption <70W...

  • Page 12: Optical Characteristics

    HP F1905E 5.2 Optical Characteristics...

  • Page 13: Block Diagram

    HP F1905E 6. Block Diagram 6.1 Monitor Exploded View...

  • Page 14: Software Flow Chart

    HP F1905E 6.2 Software Flow Chart...
  • Page 15 HP F1905E 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. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode.

  • Page 16: Electrical Block Diagram

    HP F1905E 6.3 Electrical Block Diagram 6.3.1 Scalar Board Block Diagram...

  • Page 17: Inverter/Power Board

    HP F1905E 6.3.2 Inverter / Power Board Block Diagram Inverter Block Diagram...
  • Page 18 HP F1905E Power Block Diagram...

  • Page 19: Schematic

    HP F1905E 7. Schematic 7.1 Main Board CN101 RX2-IN A_GND RX2- RX2+IN RX2+ SGND R101 47　 1/16W SCL_IN DDCCLK R102 47　 1/16W SDA_IN DDCDAT A_VSY NC RX1-IN RX1- RX1+IN RX1+ SGND DVI_5V ZD101 R103 10K　 1/16W HOT_PLUG MLL5232B 5.6V RX0-IN...
  • Page 20 HP F1905E 1.8V_CVDD Clos e to re s pe ctive pow e r Pins +1.8V FB201 120 OHM C202 C203 C204 C205 C206 C207 C208 C201 1.8V_AVDD 10uF/50V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 1.8V_DVI 1.8V_PLL 1.8V_CVDD 3.3V_LVDS +3.3V 1.8V_DVI...
  • Page 21 HP F1905E VCC5V+ TO-263 D310 U301 CN301 ES3D R316 4.7K　 1/16W AIC1084-18CE ON_OFF PBIAS VCC12V VCC12V D311 C304 VCC5V+ ES3D +1.8V 0.1uF SMAL240LVXRO +1.8V D309 CONN C305 C306 C307 0.1uF 47uF/25V 0.1uF C302 C303 +3.3V R301 100uF/25V 0.1uF Brightness 1K　 1/16W VCC5V+ +3.3V...
  • Page 22 HP F1905E CN401 CONN LV_O[0..9] RXO0- RXO0+ LV_O0 RXO0- RXO1- RXO1+ LV_O1 RXO0+ RXO2- RXO2+ RXO1- RXOC- RXOC+ LV_O2 RXO1+ RXO3- RXO3+ LV_O3 LV_O4 RXO2- RXE0- RXE0+ LV_O5 RXO2+ RXE1- RXE1+ RXE2- RXE2+ RXOC- LV_O6 RXEC- RXEC+ RXOC+ LV_O7 RXE3-...

  • Page 23: Inverter/Power Board

    HP F1905E 7.2 Power Board L907 L909 L903 +13VCC Q904 BEAD 73L253151-L(45uH) BEAD R901 MOSFET P R902 1K　 1/16W C927 1K　 1/16W C926 1000uF/25V C923 Q902 D901 1000uF/16V C911 L904 PMBS3904 0.1uF/25V AUDIO SM340A 0.1uF/25V R943 Q903 22　 1/16W PMBS3906 R903 22　...
  • Page 24 HP F1905E R701 INV1 0　 1/8W Q712 CN701 DTA144WKA C701 PT701 220uF/25V Q713 Q701 DTC144WKA R704 R702 C702 ON/OFF 100　(1206) 22　 1/8W C703 22pF/3KV 0.0022uF R705 R707 C704 6.2M　 1/2W CONN 22　 1/8W C705 Q702 0.0022uF 22pF/3KV 　 CN702 PMBS3904...
  • Page 25 HP F1905E R942 R912 100　 1/8W 665K　 1/8W INV1 C904 R915 C912 150uF/400V R914 R913 POWER X'FMR 100　 1/8W C913 100K　 2W L912 BD901 R916 1500P/2KV 0.001uF BEAD U4KB80R 665K　 1/8W T901 L911 BEAD L905 INV2 C934 R917 0.0033uF/250V R918 D902 PS102R-NC 665K　...

  • Page 26: Pcb Layout

    HP F1905E 8. PCB Layout 8.1 Main Board...

  • Page 27: Inverter/Power Board

    HP F1905E 8.2 Power BOARD...
  • Page 28 HP F1905E...
  • Page 29 HP F1905E...

  • Page 30: Keypad Board

    HP F1905E 8.3 KEY BOARD...

  • Page 31: Maintainability

    HP F1905E 9. Maintainability 9.1 Equipments and Tools Requirement 1.) Multi-meter. 2.) Oscilloscope. 3.) Pattern Generator. 4.) DDC Tool with an IBM Compatible Computer. 5.) Alignment Tool. 6.) LCD Color Analyzer. 7.) Service Manual. 8.) User Manual.

  • Page 32: Trouble Shooting

    HP F1905E 9.2 Trouble Shooting 9.2.1 Main Board 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 U301 PIN2=1.8V? Measure U302 PIN2=3.3V?
  • Page 33 HP F1905E No picture (LED is orange) No picture 1.Check power section Measure U301 PIN2=1.8V? Measure U302 PIN2=3.3V? 2.Replace U301, U302 X201 oscillate waveforms are normal Replace X201 Check if the sync signal from computer is output and video cable is connected normally...
  • Page 34 HP F1905E Panel Power Circuit Measure Q402 base is high level? X201 oscillate waveforms are normal Check Q402 and Q203 Replace X201 are broken or CN401 Replace U201 Check Correspondent component. Replace PANEL...

  • Page 35: Power/Inverter Board

    HP F1905E 9.2.2 Power Board No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C904(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901 Check R912, R916, R918, IC901...
  • Page 36 HP F1905E No Backlight Check CN903 Pin1/3 =12V Check adapter Check ON/OFF signal Check Interface board Check IC701 PIN6=5V+0.25V Check Q713,Q712, Q702, ZD701 circuit Check IC701 PIN1=5V Check Q707, Q706 circuit Check IC701 PIN 2 triangular wave is normal Check C720, C719, IC201 circuit...

  • Page 37: Keypad Board

    HP F1905E 9.2.3 Keypad 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 38: White-Balance, Luminance Adjustment

    SRG color temp. parameter is x = 313±20, y = 329 ±20, Y >200 cd/m 3. Into factory mode of HP F1905E Turn on power, at the same time press the up (+) key and menu key, 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 39 HP F1905E B. Adjust SGB color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button ) 2. Switch the MEM .Channel to Channel 4( with up or down arrow on chroma 7120 ) 3. The LCD-indicator on chroma 7120 will show x = 313 ±10, y = 329 ±10, Y = 210 ±10 cd/m...

  • Page 40: Check List After Replacing Lcd Main Board

    (Center). The exact brightness values are confirmed by the checking-regulations of different customers and different models. Ⅱ. Steps of white-balance adjustment for LCD:(Take 19” HP LCD for example) 1. Required instruments: Chroma7120、Chroma2325（BGA265A） 。 2. First connect the instruments together and turn on the LCD power, then warm up for 30 minutes under full white screen mode.
  • Page 41 HP F1905E d) Test white-balance again after Auto Level. Adjustment with hand is necessary if it is beyond the specs just the same. e) Select 7x00 item to adjust cool color-temperature and select 6x00 to adjust warm color- temperature. It can reach to the best effect through adjusting R/G/B value if it inclines to green or blue.
  • Page 42 HP F1905E 3.Input the serial number of the product (For instance: AOC LM729 is 13 bits), then press ENTER to start writing 4.Check the indication of DDC-writing program at the end. When you see the picture as the schematic picture above, “Data compare...
  • Page 43 HP F1905E Instruction：DDC-writing needs 4 files: Barcode.txt (Supply Barcode length and flow number) *.EXE (DDC-writing program) WR.bat (Group order file for cycling utilization of *EXE, and dual-click this file when perform DDC-writing) 4、w.dat The content with 128 bits of DDC...

  • Page 44: Edid Content

    HP F1905E 12. EDID CONTENT ANALOG 0： 16： 32： 48： 64： 80： 96： 112： DIGITAL 0： 16： 32： 48： 64： 80： 96： 112：...

  • Page 45: Bom List

    HP F1905E 13. BOM List T986KAVDKHHPAP Location Part NO. for TPV Description Quantity Unit CBPC981KAVHPP CONVERSION BOARD KEPC980KB4P KEY BOARD PWPC1942AUH5P POWER BOARD 12G 423 1 BUCKET BUMPER 15G8127 1 MAIN FRAME 23G3178690 6A LOGO 34G1471CPC B BEZEL 34G1473APD 1B...
  • Page 46 HP F1905E 705G980KB34082 19" BACK COVER ASS'Y 705G980KP34003 19" STAND ASS'Y 750GLU90N45 Z AU 19" V50 ZBD PANEL E089A 89G402A19N LS POWER CORD AIC981KAVHPP MAIN BOARD 40G 457624 1B LABEL-CPU 40G 45762412B CBPC LABEL C201 67G305V100 7N GP KME50VB10M-CC3 5*11...
  • Page 47 HP F1905E C203 65G0603104 32 CHIP 0.1UF 50V X7R C204 65G0603104 32 CHIP 0.1UF 50V X7R C205 65G0603104 32 CHIP 0.1UF 50V X7R C206 65G0603104 32 CHIP 0.1UF 50V X7R C207 65G0603104 32 CHIP 0.1UF 50V X7R C208 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 48 HP F1905E C304 65G0603104 32 CHIP 0.1UF 50V X7R C305 65G0603104 32 CHIP 0.1UF 50V X7R C307 65G0603104 32 CHIP 0.1UF 50V X7R C308 65G0603104 32 CHIP 0.1UF 50V X7R C310 65G0603104 32 CHIP 0.1UF 50V X7R C313 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 49 HP F1905E FB207 71G 56K121 CHIP BEAD FB208 71G 56K121 CHIP BEAD FB209 71G 56K121 CHIP BEAD Q101 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q203 57G 763 1 A03401 SOT23 BY AOS(A1) Q301 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q302 57G 417 6 PMBS3906/PHILIPS-SMT(06...
  • Page 50 HP F1905E R145 61L0603472 RST SM 0603 RC0603 4K7 R205 61L0603255 0F CHIP 255OHM 1/16W 1% R215 61L0603103 RST SM 0603 RC0603 10K R218 61L0603103 RST SM 0603 RC0603 10K R233 61L0603103 RST SM 0603 RC0603 10K R234 61L0603103 RST SM 0603 RC0603 10K...
  • Page 51 HP F1905E U102 56G113334A 24LC02B/SNG SOIC-8PIN U104 56G4LVC 14 P 74LVC14ADT U201 56G 562 70 GM5321 QFP-208 U202 56G 643500 EM6353BX2SP3B-2.9 3PIN U203 56G1133 59UH4 SST25VF010-20-4C-SA SOI U205 56G113356A 24LC16B/SNG SOIC-8PIN U301 56G 563 34 AIC 1084-18PM TO-263 U302 56G 563 7...
  • Page 52 HP F1905E 705G 980 56 03 IC901 ASS'Y 705G 980 57 07 Q901 ASS'Y 705G 980 87 04 CN901 ASS'Y 705G 980 93 06 D903/D907 ASS'Y BD901 93G 50460 16 U4KB80R C701 67G215L471 4N GP KY25VB470M-L10*16 C706 65G 3J5096ET 5PF 5% SL 3KV...
  • Page 53 HP F1905E PT701 80GL19T 8DN1 X'FMR DARFONTK.2006M.10 PT702 80GL19T 8DN1 X'FMR DARFONTK.2006M.10 R913 61G152M104 64 100KOHM 5% 2W R928 61G152M398 64 0.39 OHM 2W T901 80LL19T 3 TG TRANSFORMER VAR901 61G 46 6 TNR 10V471K PWP1942AUH5AIP POWER BOARD FOR AI...
  • Page 54 HP F1905E C928 65G0805104 22 0.1UF +-10% 25V X7R 080 C930 65G0805104 32 CHIP 0.1U 50V X7R C932 65G0805104 32 CHIP 0.1U 50V X7R C937 65G0603104 22 CHIP 0.1UF +80-20% 50V C941 65G0603104 32 CHIP 0.1UF 50V X7R C942 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 55 HP F1905E Q708 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q709 57G 759 2 RK7002 Q710 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q711 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q712 57G 760 4B PDTA144WK SOT346 Q713 57G 760 5B PDTC144WK SOT346 Q714 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q902...
  • Page 56 HP F1905E R732 61L0603431 CHIP 430OHM5% 1/10W R733 61L0603160 2F CHIP 16K OHM 1/10W 1% R735 61L0603431 CHIP 430OHM5% 1/10W R736 61L0603105 RST SM 0603 RC0603 1M P R737 61L0603102 RST SM 0603 RC0603 1K P R738 61L0603105 RST SM 0603 RC0603 1M P...
  • Page 57 HP F1905E R926 61L1206334 330K 1/4W R927 61L0805221 CHIPR 220 OHM +-5% 1/8W R929 61L0805240 2F CHIP 24KOHM 1% 1/8W R930 61L0805102 CHIPR 1K OHM +-5% 1/8W R931 61L0805102 CHIPR 1K OHM +-5% 1/8W R932 61L0805100 2F CHIP 10K OHM 1/8W 1%...
  • Page 58 HP F1905E L908 71G 55 29 FERRITE BEAD L912 71G 55 19 T FERRITE BEAD D9X3. 5X0. PT701 6G 31502 1.5MM RIVET PT702 6G 31502 1.5MM RIVET Q901 6G 31502 1.5MM RIVET R705 61G212Y625 KT MGFR 6.2MOHM +-5% 1/2W R725 61G212Y625 KT MGFR 6.2MOHM +-5% 1/2W...

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