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HP VS19T Service Manual

HP VS19T Service Manual

19” lcd monitor
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HP VS19T
SERVICE MANUAL
19" LCD Monitor
VS19T
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

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  • Page 1 HP VS19T SERVICE MANUAL 19” LCD Monitor VS19T 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...

  • Page 2: Table Of Contents

    HP VS19T Table of Content Revision List ---------------------------------------------------------------------------------------------------------------------------- 1.Monitor Specification -------------------------------------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------------------------------- 4.2 Factory Preset Display Modes ----------------------------------------------------------------------------------------------...

  • Page 3: Revision List

    HP VS19T Revision List Version Date Revision History TPV Mode Name Jan-21-06 Initial release T980KS4DKHHPAP...

  • Page 4: Monitor Specification

    HP VS19T 1.Monitor Specification Items Description Driving system TFT Color LCD Panel LTM190EX-L21 Display area 376.32(H) x301.056 (V) (19.0") Pixel pitch 0.294mm( H )x 0.294mm( V ) LCD Panel Viewable angle 140˚ (H) 135˚ (V) Response time (typ.) 16 ms...

  • Page 5: Lcd Monitor Description

    HP VS19T 2.LCD Monitor Description The LCD Monitor will contain main board, power board, key board and an audio 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 6 HP VS19T...

  • Page 7: Adjusting The Picture

    HP VS19T 3.3 Adjust the Picture Control Icons Control Icons Brightness Clock Phase Contrast Power Saver Auto Adjustment Mode Display Image Control Power-On Status Display Color Sleep Timer Custom Color Basic Menu Language Advanced Menu Management Power On Recall OSD Control...

  • Page 8: Input/Output Specification

    HP VS19T 4. Input/Output Specification 4.1 Input Signal Connector Mnemonic Signal Mnemonic Signal Red Video +5 V +5 V (from PC) Green Video Sync Ground Blue Video None PC Connect detection DDC Data Ground (DDC Return) Horizontal Sync Red GND...

  • Page 9: Factory Preset Display Modes

    HP VS19T 4.2 Factory Preset Display Modes Pixel Horz Freq Horz Vert Freq Vert Pixel Clk Preset Format (KHz) Polarity (Hz) Polarity (MHz) Source 640 x 480 31.469 59.940 25.175 640 x 480 37.861 72.809 31.500 VESA 640 x 480 37.500...

  • Page 10: Panel Specification

    HP VS19T 5. Panel Specification 5.1 General Feature Mechanical Information...

  • Page 11: Optical Characteristics

    HP VS19T 5.2 Optical Characteristics...

  • Page 12: Block Diagram

    HP VS19T 6. Block Diagram 6.1 Monitor Exploded View 6.2 Software Flow Chart...
  • Page 13 HP VS19T REMARK:...

  • Page 14: Scalar Board

    HP VS19T 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 15: Electrical Block Diagram

    HP VS19T Crystal 24MHz LCD Interface (Y601) (CN503) Scalar IC TSU56AK MTV-512MV (Include ADC, OSD) (U601) (U401) H sync V sync Key Board EEPROM Control AT24C16 (CN602) (U602) Crystal D-Sub 14.318MHz Connector (X401) (CN301) DDC_CLK, DDC_DAT EEPROM M24C02 (U301) 6.3.2 Inverter / Power Board Block Diagram...
  • Page 16 HP VS19T AC input Bridge Rectifier EMI filter Transformer Dc to Dc Rectifier diodes and Filter StartCircuit: CN902 R909/R910/R931 Feedback Over Circuit Voltage Control IC Protect ON/OFF Transformer MOSFET Resonance Lamp Over ON/OFF Feedback Voltage Control Circuit Control IC...

  • Page 17: Schematic

    HP VS19T 7. Schematic 7.1 Main Board SCHEMATIC HPQ2005 GNDR GNDR GNDG GNDG DDC_CLK VCC1.8 VCC3.3 VAA1 VAA2 VAA3 VAA4 DDC_DAT GNDB GNDB ST_DET1 HSYNC HSYNC VSYNC VSYNC DDC_WP VCC1.8 3.INPUT VCC3.3 VAA1 DDC_WP ST_DET1 VAA2 DDC_CLK DDC_DAT VAA3 VCPU...
  • Page 18 HP VS19T 3,4,5,6,7 VCC5V+ VCC5V U201 change to 1.8V TO-252 VCC12V D202 U201 DIODE R202 VCC1.8 AZ1117D-1.8 CN201 1/16W 　 VCC1.8 ON_OFF R201 4.7K 1/16W 　 C209 C210 C211 C212 VCC12V VCC12V D201 DIODE SCHOTTKY C201 R212 4.7K 　 1/16W 47uF/16V 0.1uF...
  • Page 19 HP VS19T CN301 DB15 FB301 1/16W R301 1/16W C304 0.047uF 　 　 FB302 1/16W R302 1/16W C305 0.047uF 　 　 D323 MLL5232B 5.6V FB303 　 1/16W R303 　 1/16W C306 0.047uF R304 　 1/16W C307 0.001uF D322 PC5V R325 C301...
  • Page 20 HP VS19T VCC3.3 FB401 VCC1.8 FB402 VCC3.3 VCC1.8 600 OHM 600 OHM C405 C414 10uF/16V 10uF/16V VPLL VDVI VDPLL C406 C407 C408 C409 C410 C411 C412 C413 C415 C416 C417 C418 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 21 HP VS19T CN501 PA[0..9] PA[0..9] PA[0..9] PA[0..9] LVA3P RA1P CN503 LVA3M RA1N RA3N FB0N LVACKP RA2P RA3P FB0P LVACKM LVB0M RXO0- RXO0+ LVB0P RA2N LVA2P FB1N LVB1M RXO1- RXO1+ LVB1P RA3P RA2N LVA2M FB1P LVB2M RXO2- RXO2+ RA3N RA2P LVB2P...
  • Page 22 HP VS19T VCPU VCPU R602 RP601 RP602 RP603 R601 C601 　 1/16W 　 1/16W 　 1/16W RP604 0.1uF 　 1/16W 　 1/16W C602 R606 R607 22pF 　 1/16W 　 1/16W 　 1/16W R644 U601 　 1/16W X601 CHANGE TO 24M HZ EA/VP P0.0...
  • Page 23 HP VS19T CN701 300 OHM R701 U701 300 OHM R702 C701 0.1uF/16V C702 0.1uF/16V LINN RINN C728 C729 C703 0.1uF/16V C704 0.1uF/16V LINP RINP LINE IN GREEN R731 R732 AGND 470pF 470pF 1/16W AGND 　 AUDIO_SD SHUTDOWN BYPASS 1/16W C705 1uF/50V AGND 　...

  • Page 24: Power Board

    HP VS19T 7.2 Power Board (Include Inverter And Power) L907 L909 L903 +13VCC Q904 BEAD 73L253151-L(45uH) BEAD R901 MOSFET P R902 　 1/16W C927 1/16W C926 　 1000uF/25V C923 Q902 D901 1000uF/16V C911 L904 PMBS3904 0.1uF/25V AUDIO SM340A 0.1uF/25V R943 Q903 　...
  • Page 25 HP VS19T R701 INV1 　 1/8W Q712 CN701 DTA144WKA C701 PT701 220uF/25V Q713 Q701 DTC144WKA R704 R702 C702 ON/OFF 100 (1206) 　 　 1/4W C703 22pF/3KV 0.0022uF R705 R707 C704 6.2M 　 1/2W CONN 　 1/4W C705 Q702 0.0022uF 22pF/3KV...
  • Page 26 HP VS19T R942 R912 1/8W 　 665K 1/8W INV1 　 C904 R915 C912 150uF/400V R914 R913 POWER X'FMR 1/8W 　 C913 100K L912 　 BD901 R916 1500P/2KV 0.001uF BEAD U4KB80R 665K 1/8W T901 L911 　 BEAD L905 INV2 C934 R917 0.0033uF/250V...

  • Page 27: Pcb Layout

    HP VS19T 8. PCB Layout 8.1 Main Board...

  • Page 28: Inverter/Power Board

    HP VS19T 8.2 Inverter / Power Board 8.3 Key Board (715G1404-2)

  • Page 29: Maintainability

    HP VS19T 9. Maintainability 9.1Equipments 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 30: Trouble Shooting

    HP VS19T 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 CN201 PIN5/6=12V?
  • Page 31 HP VS19T No picture (LED is orange) No picture Y601 oscillate waveforms are Key is under control? normal Replace Y601 X401 oscillate waveforms are normal Replace U601 Replace X401 Replace U401 Check if the sync signal from computer is output and video cable...
  • Page 32 HP VS19T Panel Power Circuit Measure Q204 base is high level? Y601 oscillate waveforms are normal Check Q204 and Q203 are broken Replace Y601 or CN503 solder? Replace U601 Check Correspondent component. Replace U401 Replace PANEL...

  • Page 33: Power/Inverter Board

    HP VS19T 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 34 HP VS19T 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 35: Keypad Board

    HP VS19T 9.2.3 Keypad Board OSD is unstable or not working Is Keypad board connecting normally Connect Keypad Board Replace Button Switch Is Button Switch normally Replace Keypad Board Is Keypad board normally Check main board...

  • Page 36: White-Balance, Luminance Adjustment

    C. 6500K color: Don’t adjustment,Custom requires. 3. Into factory mode of HP VS19T A. 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 37 HP VS19T B. Adjust sRGB color-temperature 1. Switch the chroma-7120 to sRGB channel. 2. The chroma 7120 will show x = 313 ±20, y = 329 ±20, Y >200 cd/m 3. Switch the chroma 7120 l to RGB MODE ( with press “MODE” button to change ) 4.

  • Page 38: 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 39 HP VS19T 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 40 HP VS19T 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 41 HP VS19T 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 42: Edid Content

    HP VS19T 12. EDID Content 16 : 32 : 48 : 64 : 80 : 96 : 112:...

  • Page 43: Bom List

    HP VS19T 13. BOM List T980KS4DKHHPAP Location Part NO. For TPV Description Quantity Unit CBPC980KS4HPAP CONVERSION BOARD KEPC980KD4P KEY BOARD PWPC1942SEH2P POWER BOARD 15G8126 7 MAIN FRAME 23G3178690 6A LOGO 33G4788 PC L STAND-CAP 34G1469APC B BEZEL 44G3918 1 EPS(L)
  • Page 44 HP VS19T C213 67G405V470 3P 47UF 16V C215 67G405V470 3P 47UF 16V C219 67G215L221 4R LOW E.S.R 220UF +/-20% C405 67G405V100 3P 10UF 16V C414 67G405V100 3P 10UF 16V C419 67G405V100 3P 10UF 16V C422 67G405V100 3P 10UF 16V C424...
  • Page 45 HP VS19T C310 65G0603473 32 CHIP 0.047UF 50V X7R C311 65G0603680 31 CHIP 68PF 50V NPO C312 65G0603221 31 CER1 0603 NP0 50V 220P C313 65G0603104 32 CHIP 0.1UF 50V X7R C314 65G0603104 32 CHIP 0.1UF 50V X7R C315 65G0603104 12...
  • Page 46 HP VS19T C610 65G0603102 32 1000PF +-10% 50V X7R C613 65G0603104 32 CHIP 0.1UF 50V X7R C701 65G0603104 12 CER2 0603 X7R 16V 100N C702 65G0603104 12 CER2 0603 X7R 16V 100N C703 65G0603104 12 CER2 0603 X7R 16V 100N...
  • Page 47 HP VS19T D601 93G 6432P LL4148 FB202 71G 56K121 CHIP BEAD FB301 61L0603000 RST SM 0603 JUMP MAX 0R FB302 61L0603000 RST SM 0603 JUMP MAX 0R FB303 61L0603000 RST SM 0603 JUMP MAX 0R FB304 61L0805201 200 OHM 0805 1/8W...
  • Page 48 HP VS19T R309 61L0603101 RST SM 0603 RC0603 100R R310 61L0603102 RST SM 0603 RC0603 1K P R311 61L0603102 RST SM 0603 RC0603 1K P R312 61L0603101 RST SM 0603 RC0603 100R R313 61L0603222 RST SM 0603 RC0603 2K2 R314...
  • Page 49 HP VS19T R613 61L0603103 RST SM 0603 RC0603 10K R615 61L0603103 RST SM 0603 RC0603 10K R616 61L0603472 RST SM 0603 RC0603 4K7 R617 61L0603391 CHIP 390 OHM 1/10W R620 71G 59G301 CHIP BEAD 300OHM R621 71G 59G301 CHIP BEAD 300OHM...
  • Page 50 HP VS19T R729 61L0603000 RST SM 0603 JUMP MAX 0R R731 61L0603823 CHIPR 82KOHM +-5% 1/16W R732 61L0603823 CHIPR 82KOHM +-5% 1/16W RP601 61L 125103 8 CHIP AR 8P4R 10KOHM +-5 RP602 61L 125103 8 CHIP AR 8P4R 10KOHM +-5...
  • Page 51 HP VS19T ZD105 93G 39S 34 T UDZS5.6B ZD106 93G 39S 34 T UDZS5.6B ZD107 93G 39S 34 T UDZS5.6B PWPC1942SEH2P PW1942SEH2SMTP POWER BOARD FOR SMT 11G6049 2 TIE MOUNT(S) 40G 45762420A ID LABEL 1.02 705G 980 57 07 Q901 ASS'Y...
  • Page 52 HP VS19T L905 73G 253 91 L CHOKE BY LI TA L906 73G 253 91 L CHOKE BY LI TA L909 71G 55 29 FERRITE BEAD NR901 61G 58050 WT NTC 5 OHM 5A PT701 80GL19T 8 DN OZ9RR_TRANS PT702...
  • Page 53 HP VS19T C923 65G0603104 22 CHIP 0.1UF +80-20% 50V C924 65G0805471 21 CHIP 470PF 25V NPO C925 65G0805103 22 CHIP 0.01uF 25V X7R 080 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...
  • Page 54 HP VS19T 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 4 DTA144WKA BY ROHM SMT Q713 57G 760 5 DTC144WKA BY ROHM SMT Q714 57G 417 6...
  • Page 55 HP VS19T 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 R739...
  • Page 56 HP VS19T 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% R933 61L0805472 CHIRP 4.7K OHM +-5% 1/8 R934 61L0805102...
  • Page 57 34G1460 PC B STAND PILLAR 34G1461 PC B BASE Q1G 130 8120 SCREW Q1G 140 8128 SCREW M037 S37G5133 19" HP LCD HINGE ASS'Y 2F0605200 4F0612052 00 METAL WASHER 4F061210M 00 METAL WASHERS12.0*6.03* 4F061210T 00 METAL WASHERS12.0*8.00* 4F061210T 01 METAL WASHERS12.0*4.72*...

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