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Asus MM19T Service Manual

19” lcd monitor
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ASUS MM19T

SERVICE MANUAL

19" LCD MONITOR
MM19T
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 RE LIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
1

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  • Page 1: Service Manual

    ASUS MM19T SERVICE MANUAL 19” LCD MONITOR MM19T 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 RE LIABILITY FOR...

  • Page 2: Table Of Contents

    ASUS MM19T Table of Content Revision List…………………………………………………………………………………………………………. 1. Monitor Description…………………………………………………………………………………………….. 2. LCD Monitor Description……………………………………………………………………………………….. 3. Operating Instructions………………………………………………………………………………………….. 3.1 General Instructions…………………………………………………………………………………………... 3.2 Front Panel Control……………………………………………………………………………….…………... 3.3 Adjusting the Picture………………………………………………………………………………………….. 4. Input/Output Specification……………………………………………………………………………………... 4.1 Input Signal Connector……………………………………………………………………………………….. 4.2 Power Supply Requirements………………………………………………………………………………… 4.3 Factory Preset Display Modes………………………………………………………………………………..

  • Page 3: Revision List

    ASUS MM19T Revision List Version Date Revision History TPV Model Name Mar-15-06 Initial Release T980KH2HDAUSAP...

  • Page 4: Monitor Description

    ASUS MM19T 1. Monitor Specifications Items Description Driving system TFT Color LCD Type HSD190ME13 Size 48.0cm(19.0") LCD Panel Pixel pitch 0.294mm (H) x 0.294mm (V) Viewable angle 160(H) 160(V)(CR>5) Response time 8 ms Sync. Type H/V TTL 15Pin Analog Input Signal...

  • Page 5: Lcd Monitor Description

    ASUS MM19T 2. LCD Monitor Description The LCD MONITOR will contain a main board, a power board, a keypad 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: Operating Instructions

    ASUS MM19T 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located in front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.

  • Page 7: Adjusting The Picture

    ASUS MM19T 3.3 Adjusting The Picture Adjustment steps: 1. Press the MENU-button to activate the OSD window. 2. Press < or > to select the desired function. 3. Press the MENU-button to select the function that you want to adjust.
  • Page 8 ASUS MM19T Yellowish Select yellowish skin stone The image appears bluer. Cool (9300°K) Color Normal Normal image color. (7500°K) Temperature The image appears redder. Warm (6500°K) Brightness Adjust the brightness level Luminance Contrast Adjust the contrast level H-Position Adjust the horizontal position of the OSD...

  • Page 9: Input/Output Specification

    ASUS MM19T 4. Input/Output Specification 4.1 Input Signal Connector Analog Connector Pin No. Description Pin No. Description Green Logic Ground Blue Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout Digital Connector...

  • Page 10: Power Supply Requirements

    ASUS MM19T 4.2 Power Supply Requirement A/C Line voltage range : 100 V ~ 240 V : 50 ± 3Hz, 60 ± 3Hz A/C Line frequency range Input Current : 1.5A max at 100V; 0.8A max at 240 V : < 60A peak at 240 VAC and cold starting Peak surge current <...

  • Page 11: Factory Preset Display Modes

    ASUS MM19T 4.3 Factory Preset Display Modes VESA MODES Horizontal Vertical Nominal Sync Nominal Sync Nominal Frequency Polarity Freq. Polarity Pixel Mode Resolution Total +/- 0.5kHz +/- 1 Hz Clock (MHz) 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861...

  • Page 12: Panel Specification

    ASUS MM19T 4.4 Panel Specification 4.4.1 General Description 19”SXGA TFT LCD Panel 4 CCFLs Backlight System Supported SXGA (V:1024 lines, H:1280 pixels) Resolution Supported to 75Hz Refresh Rate LCD Timing Controller RoHS Compliance VESA Compatible 4.4.2 Display Characteristics...

  • Page 13: Optical Characteristics

    ASUS MM19T 4.4.3 Optical Characteristics...

  • Page 14: Electrical Characteristics

    ASUS MM19T 4.4.4 Electrical Characteristics 1. TFT LCD Module 2. Backlight Unit...

  • Page 15: Block Diagram

    ASUS MM19T 5. Block Diagram 5.1 Monitor Exploded View...

  • Page 16: Software Flowing Chart

    ASUS MM19T 5.2 Software Flowing Chart...
  • Page 17 ASUS MM19T 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 18: Electrical Block Diagram

    ASUS MM19T 5.3 Electrical Block Diagram 5.3.1 Main Board Crystal LCD Interface 24MHz (CN503) (X601) Scalar IC TSU56AWK MTV512 (Include ADC, OSD) (U601) (U401) EPR_SDA EPR_SCL H sync D-Data V sync Key Board D-Clock EEPROM Control M24C16 (U602) DVI-I only...

  • Page 19: Inverter/Power Board

    ASUS MM19T 5.3.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit CN902 R906, R907 Feedback Over IC101 Voltage Circuit Protect Control IC ON/OFF OSC and DC Convert MOSFET Output Circuit Circuit Lamp Feedback...

  • Page 20: Schematic

    ASUS MM19T 6. Schematic 6.1 Main Board 715G1423-3-512 TSU16/56AK SCHEMATIC GNDR GNDR GNDG GNDG DDC_CLK VCC1.8 VCC3.3 VAA1 VAA2 VAA3 VAA4 DDC_DAT GNDB GNDB ST_DET1 HSYNC HSYNC VSYNC VSYNC DVI_DET VCC2.5 DDCCI_SEL VCC3.3 VAA1 VAA2 VAA3 CLK+ CLK+ VAA4 CLK-...
  • Page 21 ASUS MM19T VCC5V+ VCC5V SOT-252 D202 U201 VCC12V R202 GS1D VCC1.8 VCC12V AZ1117D-1.8 CN201 　 1/16W VCC1.8 ON_OFF R201 4.7K 　 1/16W C210 C211 C212 VCC12V VCC12V D201 SS14 C201 R212 4.7K 　 1/16W 0.1uF 47uF/16V 0.1uF VCC5V+ VCC5V VCC5V...
  • Page 22 ASUS MM19T CN301 DB15 FB301 　 1/16W R301 　 1/16W C304 0.047uF FB302 1/16W R302 1/16W C305 0.047uF 　 　 FB303 　 1/16W R303 　 1/16W C306 0.047uF R304 1/16W C307 0.001uF 　 PC5V R325 C301 C302 C303 VGA_CON 　...
  • Page 23 ASUS MM19T 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 24 ASUS MM19T PA[0..9] PA[0..9] LVA3P CN503 LVA3M LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVBCKM RXOC- RXOC+ LVBCKP LVA1P RXO3- RXO3+ LVB3M LVB3P LVA1M LVA0M RXE0- RXE0+ LVA0P LVA1M RXE1- RXE1+...
  • Page 25 ASUS MM19T VCPU VCPU RN602 RN601 R601 R602 C601 R607 1/16W 1/16W 　 　 R606 　 1/16W 　 1/16W 0.1uF 　 1/16W 4/2/2004-change Crystal from 20MHz to 24MHz 　 1/16W R644 R645 R646 C602 22pF 　 1/16W U601 X601 P1.0 P1.1...

  • Page 26: Power Board

    ASUS MM19T 6.2 Power Board 715G1349-2...
  • Page 27 ASUS MM19T...
  • Page 28 ASUS MM19T...
  • Page 29 ASUS MM19T...

  • Page 30: Audio Board

    ASUS MM19T 6.3 Audio Board 715G1144-4NMV OUT_L OUT_R +12V PIN-3 CN202 MUTE PIN-1 VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF WAFER 2*7P 2.54mm U201 TDA7496L CN204 C205 CN203 C204 0.47uF R201 10K　 OUTL 470uF/16V C206 0.47uF OUTR 10K　 R203 R212...

  • Page 31: Pcb Layout

    ASUS MM19T 7. PCB Layout 7.1 Main Board 715G1423-3-512...

  • Page 32: Power Board

    ASUS MM19T 7.2 Power Board 715G1349-2...

  • Page 33: Audio Board

    ASUS MM19T 7.3 Audio Board 715G1144-4-NMV 7.4 Key Board 715G1820-B...

  • Page 34: Maintainability

    ASUS MM19T 8. Maintainability 8.1 Equipments And Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.

  • Page 35: Trouble Shooting

    ASUS MM19T 8.2 Trouble Shooting 8.2.1 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 Adapter/Inverter section Measure U201 PIN2=1.8V U202 PIN2=3.3V...
  • Page 36 ASUS MM19T No picture (LED orange) No picture The button if X601 oscillate Replace X601 under control waveform is normal Check reset circuit of Check Correspondent component U601 is normal Measure U201 PIN2=1.8V U202 PIN2=3.3V Replace U601 Replace U201, U202...
  • Page 37 ASUS MM19T White screen White screen Measure Q204 base X601 oscillate waveform is normal is high level? Replace X601 Check Q204, Q203 is Check reset circuit of broken or CN503 solder? U601 is normal Check Correspondent Check Correspondent component. component.

  • Page 38: Inverter/Power Board

    ASUS MM19T 8.2.2 Power/Inverter Board 1) No power Check CN902 pin2,4 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901...
  • Page 39 ASUS MM19T 2.) W / LED, No Backlight Check CN902 pin2, 4 = 12V Check adapter board Check ON/OFF signal Check Main Board Check IC201 pin5=12V Change Q207, Q205, Q206, ZD203 Check IC201 PIN18 have the output of sawtooth wave at short...

  • Page 40: Keypad Board

    ASUS MM19T 8.2.3 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally? Check Main Board...

  • Page 41: White-Balance, Luminance Adjustment

    6500 color temp. parameter is x = 313 ±20, y = 329 ±20, Y = 180 ±10 cd /m 3. Into Factory mode of ASUS MM19T: ① Press the MENU 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 42 ASUS MM19T 6. Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4,5,6) until chroma 7120 RGB value meet the tolerance =100±2 C. Adjust 6500 color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2.

  • Page 43: Edid Content

    ASUS MM19T 10. EDID Content Analog EDID 112: Digital EDID 112:...

  • Page 44: Bom List

    ASUS MM19T 11. BOM List T980KH2HDAUSAP Location Part No. for TPV Description Quantity Unit AUPC980KA9P AUDIO BOARD CBPC980KH2USP CONVERSION BOARD KEPC980KUSAP KEY BOARD PWPC1942HSU3P POWER BOARD S95G801830634 LVDS 15G6207 L 3 PANEL BRACKET 15G6207 R 3 PANEL BRACKET 44G3231 15600...
  • Page 45 ASUS MM19T 15G6206 1 HINGE BRACKET 34G6202 GM17B REAR COVER Q1G 140 8128 SCREW 705L980KF34078 33G4891 1 LENS 33G6433 GM L KEY PAD 34G6398 GM 1B BEZEL 78G 322501 KL SPEAKER 78G 322504 RK SPEAKER Q1G1030 8128 SCREW 705L980KP34076 12G 394 3...
  • Page 46 ASUS MM19T R201 61L0603183 CHIP 18K OHM 1/10W R203 61L0603183 CHIP 18K OHM 1/10W R207 61L0603102 RST SM 0603 RC0603 1K P R208 61L0603102 RST SM 0603 RC0603 1K P R210 61L0603203 CHIPR 20K OHM+-5% 1/10W R211 61L0603203 CHIPR 20K OHM+-5% 1/10W...
  • Page 47 ASUS MM19T C305 65G0603473 32 CHIP 0.047UF 50V X7R C306 65G0603473 32 CHIP 0.047UF 50V X7R C307 65G0603102 32 1000PF +-10% 50V X7R C308 65G0603473 32 CHIP 0.047UF 50V X7R C309 65G0603473 32 CHIP 0.047UF 50V X7R C310 65G0603473 32 CHIP 0.047UF 50V X7R...
  • Page 48 ASUS MM19T C423 65G0603104 32 CHIP 0.1UF 50V X7R C425 65G0603104 32 CHIP 0.1UF 50V X7R C426 65G0603104 32 CHIP 0.1UF 50V X7R C428 65G0603104 32 CHIP 0.1UF 50V X7R C510 65G0603104 32 CHIP 0.1UF 50V X7R C601 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 49 ASUS MM19T D315 93G 39147 TZMC5V6 D316 93G 39147 TZMC5V6 D317 93G 39S 39 T MLL5234B D318 93G 39147 TZMC5V6 D319 93G 39147 TZMC5V6 D320 93G 39147 TZMC5V6 D321 93G 39147 TZMC5V6 D322 93G 39147 TZMC5V6 D323 93G 39147 TZMC5V6...
  • Page 50 ASUS MM19T R207 61L0603472 RST SM 0603 RC0603 4K7 R208 61L0603103 RST SM 0603 RC0603 10K R209 61L0603000 RST SM 0603 JUMP MAX 0R R211 61L0603103 RST SM 0603 RC0603 10K R212 61L0603472 RST SM 0603 RC0603 4K7 R215 61L0603513...
  • Page 51 ASUS MM19T R343 61L0603100 CHIP 10 OHM 1/10W R344 61L0603100 CHIP 10 OHM 1/10W R345 61L0603100 CHIP 10 OHM 1/10W R346 61L0603100 CHIP 10 OHM 1/10W R347 61L0603100 CHIP 10 OHM 1/10W R348 61L0603100 CHIP 10 OHM 1/10W R349 61L0603100...
  • Page 52 ASUS MM19T R625 61L0603103 RST SM 0603 RC0603 10K R626 61L0603103 RST SM 0603 RC0603 10K R627 61L0603103 RST SM 0603 RC0603 10K R636 61L0603101 RST SM 0603 RC0603 100R R639 61L0603101 RST SM 0603 RC0603 100R R640 61L0603102 RST SM 0603 RC0603 1K P...
  • Page 53 ASUS MM19T PWPC1942HSU3P PW1942HSU3SMTP POWER BOARD FOR SMT 40G 45762420A ID LABEL 1.03 705L 560 61 06 R903 ASS'Y 705L 780 57 51 Q901 ASS'Y 705L 980 87 05 CN901 ASS'Y 705L 980 93 04 D910/D911 ASS'Y BD901 93G 50460 16...
  • Page 54 ASUS MM19T L903 73G 253 91 T CHOKE L904 73L 174 26T1G LINE LILT 0.45MM NR901 61G 58050 WT NTC 5 OHM 5A PT201 80LL17T 16DNG TRANSFORMER PT202 80LL17T 16DNG TRANSFORMER R914 61G152M398 64 0.39 OHM 2W R917 61G 20747052T...
  • Page 55 ASUS MM19T C240 65G0805104 32 CHIP 0.1U 50V X7R C241 65G0805152 22 CHIP 0.005UF 25V X7R 08 C242 65G0805332 32 3200PF/25V/X7R C243 65G0805104 32 CHIP 0.1U 50V X7R C244 65G0805225 12 CHIP 2.2UF 15V X7R 0805 C245 65G0805104 32 CHIP 0.1U 50V X7R...
  • Page 56 ASUS MM19T IC901 56G 379 33 SG6841SZ Q101 57G 763 3 AO4411 SO-8 Q102 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q103 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q204 57G 60040A AM4512C-T1-PF SO-8 Q205 57G 760 4B PDTA144WK SOT346 Q206 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q207...
  • Page 57 ASUS MM19T R213 61L0805362 CHIP 306KOHM 1/8W R214 61L0805000 CHIP O OHM 1/8W R215 61L0805431 CHIP 430OHM 5% 0805 1/8 R216 61L0805100 4F CHIPR 1M OHM +-1% 1/8W R217 61L0805623 CHIPR 62K OHM +-5% 1/8W R218 61L0805102 CHIPR 1K OHM +-5% 1/8W...
  • Page 58 ASUS MM19T R910 61L1206221 CHIP 220 OHM 1/4W R911 61L0805240 2F CHIP 24KOHM 1% 1/8W R912 61L0805203 CHIPR 20KOHM +-5% 1/8W R913 61L1206203 20K OHM 5% 1/4W R915 61L1206303 CHIP 30K OHM 1% 1/4W R916 61L0805472 CHIRP 4.7K OHM +-5% 1/8...
  • Page 59 ASUS MM19T Q901 6G 31502 1.5MM RIVET R208 61G212Y305 KT MGFR 3M OHM +-5% 1/2W R224 61G212Y305 KT MGFR 3M OHM +-5% 1/2W T901 6G 31502 1.5MM RIVET 96G 29 6 SHRINK TUBE UL/CSA R903 61G152M10458F 100K OHM 5% 2W...

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