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Asus MW201U Service Manual

20" lcd color monitor
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20" LCD Color Monitor
Service
Service
Service
Table Of Contents......................................................1
Revision List........................................................2
Important Safety Notice.....................................3
1.Monitor Specification...............................................4
2.LCD Monitor Description........................................5
3.Operation Instruction............................................6
3.1.General Instructions.........................................6
3.2.Control Button......................................................6
3.3.OSD Menu.............................................................8
4.Input/Output Specification.......................................11
4.1.Input Signal Connector.........................................11
4.2.Factory Preset Display Modes..........................12
4.3.Power Supply Requirements...............................12
4.4.Panel Specification.........................................13
5.Block Diagram.......................................................16
5.1.Software Flow Chart......................................16
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
5.2.Electrical Block Diagram...........................18
6.Schematic.....................................................20
6.1.Main Board...................................................20
6.2.Power Board.............................................26
7.PCB Layout.....................................................28
7.1.Main Board.................................................28
7.2.Power Board..........................................31
7.3 Audio Board.................................................34
7.4.Key Board....................................................34
8.Maintainability................................................35
8.2.Trouble Shooting..........................................36
10.Monitor Explode View.................................44
11.Spare Parts List..........................................45
12. Different Parts List....................................66
SAFETY NOTICE
1
ASUS MW201U
Horizontal Frequency
30-83 KHz
Page

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  Summary of Contents for Asus MW201U

  • Page 1: Table Of Contents

    20" LCD Color Monitor ASUS MW201U Service Service Service Horizontal Frequency 30-83 KHz TABLE OF CONTENTS Description Page Description Page 5.2.Electrical Block Diagram……………..…..18 Table Of Contents..……......…..1 Revision List.…........……..2 6.Schematic……………........20 6.1.Main Board………..........20 Important Safety Notice.……....……..3 1.Monitor Specification......………..4 6.2.Power Board...……........26 2.LCD Monitor Description……………………………..5 7.PCB Layout..…………........28...
  • Page 2: Revision List

    20" LCD Color Monitor ASUS MW201U Revision List Version Release Date Revision History TPV Model Name TA6CMUMTW8USAP TA6CMUMBW8U1AP TA6CMUMBW8USAP Aug.15, 2006 Initial release TA6CMUMCW8USAP TA6CMUMDW8USAP TA6CMUMKW8USAP Feb.08 2007 Add new BOM in Item 12 TA6CMUMBW8U1AP...
  • Page 3: Important Safety Notice

    20" LCD Color Monitor ASUS MW201U Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations.
  • Page 4: Monitor Specification

    20" LCD Color Monitor ASUS MW201U 1. Monitor Specifications Driving system TFT Color LCD Size 51.11cm(20") Pixel pitch 0.258mm( H )x 0.258mm( V ) LCD Panel Response time (type) 5ms for CPT panel Viewable angle 170˚ (H) 160˚ (V) (CR≥10)
  • Page 5: Lcd Monitor Description

    20" LCD Color Monitor ASUS MW201U 2. LCD Monitor Description The LCD monitor will contain a main board, a power board, an audio board and a key board which house the flat panel control logic, brightness control logic and DDC.
  • Page 6: Operation Instruction

    20" LCD Color Monitor ASUS MW201U 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at the front of the panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 7 20" LCD Color Monitor ASUS MW201U 3.2.2 Key Function...
  • Page 8: Osd Menu

    20" LCD Color Monitor ASUS MW201U 3.3 OSD Menu 3.3.1 How to Reconfigure 3.1.2 OSD Function Introduction...
  • Page 9 20" LCD Color Monitor ASUS MW201U...
  • Page 10 20" LCD Color Monitor ASUS MW201U...
  • Page 11: Input/Output Specification

    20" LCD Color Monitor ASUS MW201U 4. Input/Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Video Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync Red Ground V-Sync...
  • Page 12: Factory Preset Display Modes

    20" LCD Color Monitor ASUS MW201U 4.2 Factory Preset Display Modes 4.3 Power Supply Requirements A/C Line voltage range 100 V ~ 240 V 50 ± 3Hz, 60 ± 3Hz A/C Line frequency range < 60A peak at 240 VAC and cold starting Peak surge current <...
  • Page 13: Panel Specification

    20" LCD Color Monitor ASUS MW201U 4.4 Panel Specification 4.4.1 General Features CLAA201WA07 is 20.1”(51.11cm) color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, LVDS driver ICs, control circuit and backlight(CCFL, 6 tubes). By applying 8 bit digital data (6bits+FRC), 1680×1050, drived by 5 voltages,16.7M-color images are displayed on the 20.1”...
  • Page 14 20" LCD Color Monitor ASUS MW201U 4.4.2 Optical Characteristics...
  • Page 15 20" LCD Color Monitor ASUS MW201U 4.4.3 Electrical Characteristics (1) TFT-LCD (2) Backlight...
  • Page 16: Block Diagram

    20" LCD Color Monitor ASUS MW201U 5. Block Diagram 5.1 Software Flow Chat...
  • Page 17 20" LCD Color Monitor ASUS MW201U 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags.
  • Page 18: Electrical Block Diagram

    20" LCD Color Monitor ASUS MW201U 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal LCD Interface 24MHz (CN701) (X601) Scalar IC MST9259BH MTV416GMV (Include ADC, OSD) (U604) (U401) EPR_SDA EPR_SCL H sync D-Data Key Board V sync D-Clock EEPROM Control...
  • Page 19 20" LCD Color Monitor ASUS MW201U 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904、R932、R933 CN903 Feedback Over Voltage Circuit Control IC Protect ON/OFF Output MOSFET Circuit Transformer Lamp Over ON/OFF Feedback...
  • Page 20: Schematic

    20" LCD Color Monitor ASUS MW201U 6. Schematic 6.1 Main Board 715G2116-1 R137 R138 +5V_S TO-263 R133 +3.3AVDD +3.3V PWM_DUTY   1/10W +12V   1/8W U101 L101 VOUT R115 120 OHM AO3401 Q108 C131   1/10W R132 C130 AO3401L/NC C107...
  • Page 21 20" LCD Color Monitor ASUS MW201U CN202 JACK RX2-IN R239   1/10W A_GND RX2N RX2+IN R240   1/10W RX2P SGND DVI DDC2_SCL DDCCLK DVI DDC2_SDA DDCDAT A_VSY NC RX1-IN R241   1/10W RX1N RX1+IN R234   1/10W RX1P ZD217 ZD218...
  • Page 22 20" LCD Color Monitor ASUS MW201U +3.3AVDD +3.3V L407 AVDD_MPLL L408 AVDD_PLL AVDD18_DVI AVDD18_ADC 120 OHM 120 OHM C426 C423 C424 C425 AVDD_LPLL C422 AVDD_PLL2 0.1uF 0.1uF 22uF/50V 0.1uF 22uF/50V AVDD_APLL AVDD_MPLL AVDD_ADC AVDD_MCLK +3.3AVDD L411 AVDD_ADC +3.3V L412 AVDD_LPLL...
  • Page 23 20" LCD Color Monitor ASUS MW201U +3.3V_SD L301 +3.3V_MC +3.3V_MC +3.3V_MQ +3.3V_MC +3.3V_MQ AR[0..10] 120 OHM C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C313 22uF/50V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 24 20" LCD Color Monitor ASUS MW201U R647 4.7K   1/10W HPD_CTRL VCPU R648 NC HDCP_WP VCPU R627 R628 R630 R631 R632 R633 R634 R629 CN604 +12V D4 LEFT C601 0.1uF LM810M3-2.93V DIO/MA730 VCPU VCPU C602 22pF P7.0 P1.0 P1.1 X601 AD[0..3]...
  • Page 25: Lvds Interface

    20" LCD Color Monitor ASUS MW201U CN701 LVDS INTERFACE CONNECT CN702 RXOIN0- RXO0- RXO0+ RXOIN0+ RXOIN1- RXO1- RXO1+ RXOIN1+ RXOIN0- RXOIN3+ RXOIN2- RXO2- RXO2+ RXOIN2+ RXOIN0+ RXOIN3+ RXOIN3- RXOCKIN- RXOC- RXOC+ RXOCKIN+ RXOIN1- RXOIN3- RXOIN1+ RXOCKIN+ RXOIN3- RXO3- RXO3+ RXOIN3+...
  • Page 26: Power Board

    20" LCD Color Monitor ASUS MW201U 6.2 Power Board 715G1847-1 R918 C912 0.001uF/500V L904 R941 R942 inverter   1/4W R939 R940 F902 +12V R919 Coil 100 /1206     1/4W R920 ZD902 100 /1206   C917 RLZ13B SP20150 C918 C919...
  • Page 27 20" LCD Color Monitor ASUS MW201U CN801 C801 47pF/3KV D801 C806 4.7uF/25V C803 SB240 C804 47pF/3KV V12A Q801 AM4502C-T1-PF C802 47pF/3KV 470uF/25V PT801 R801 ZD802 C805 POWER X'FMR C807 2.4KΩ 1/10W R802 80GL20T-12-DN CONN 470Ω 1/4W 0.1UF/50V ZD801 R803 R804 C808 RLZ5.6B...
  • Page 28: Pcb Layout

    20" LCD Color Monitor ASUS MW201U 7. PCB Layout 7.1 Main Board 715G2116-1...
  • Page 29 20" LCD Color Monitor ASUS MW201U...
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  • Page 31: Power Board

    20" LCD Color Monitor ASUS MW201U 7.2 Power Board 715G1847-1...
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  • Page 34: Audio Board

    20" LCD Color Monitor ASUS MW201U 7.3 Audio Board 715G2098-1 7.4 Key Board 715G2099-1...
  • Page 35: Maintainability

    20" LCD Color Monitor ASUS MW201U 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 36: Trouble Shooting

    20" LCD Color Monitor ASUS MW201U 8.2 Trouble Shooting 8.2.1 Main Board 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 U105 PIN1=1.8V...
  • Page 37 20" LCD Color Monitor ASUS MW201U (2). No Picture No picture Measure U101 PIN2=3.3V, U102 PIN2=3.3V U105 PIN1=1.8V? Replace U101, U102 or U105 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable...
  • Page 38 20" LCD Color Monitor ASUS MW201U (3). White screen White screen Measure Q107 base X401 oscillate waveform is normal is high level? Replace X401 Check Q107, Q104 and Q105 is broken or CN701 solder? Check reset circuit of U401 is normal...
  • Page 39 20" LCD Color Monitor ASUS MW201U 8.2.2 Power/Inverter Board 1.) No power Check CN903 pin6 = 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 pin8 of IC901...
  • Page 40 20" LCD Color Monitor ASUS MW201U 2.) W / LED, No Backlight Check CN903 pin6 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 pin5=12V Change Q802 or Q803 Check IC801 PIN18, 17 have the output of square wave at short...
  • Page 41 20" LCD Color Monitor ASUS MW201U 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?
  • Page 42: White-Balance, Luminance Adjustment

    = 313 ±20, y = 329 ±20, Y= 150 ±20cd/m 3. Into Factory mode of ASUS MW201U: 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 43 20" LCD Color Monitor ASUS MW201U 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 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.
  • Page 44: Monitor Explode View

    20" LCD Color Monitor ASUS MW201U 10. Monitor Exploded View...
  • Page 45: Spare Parts List

    20" LCD Color Monitor ASUS MW201U 11. Spare Parts List TA6CMUMTW8USAP Location Part No. for TPV Description V000 012G 394 3 RUBBER FOOT 040G 457834 4A GP S/N LABEL FOR ID 040G 581680 1A WARRANTY LABEL 040G 582680 1A CARTON LABEL...
  • Page 46 20" LCD Color Monitor ASUS MW201U 750GLCA1WA721N PANEL LCD 20.1" WA07 011 CPT V000 A15G0028 1 VESA BKT A15G0075AS1 1 MAIN FRAME A15G0076 1 1 BKT CONNECTOR A33G0064 GM 1L LOGO COVER A33G0065 GM 1L LOGO LOCKER A34G0099 GM 1L 30...
  • Page 47 20" LCD Color Monitor ASUS MW201U A37G0015 1 HINGE Q15G0074 1 BASE BKT CN202 033G8027 14 WAFER 14P 2.0MM DIP DUAL ROW U201 056G 616 1 TDA7496 C209 067G 2151097NT KMY50VB1M-TP5 5*11.5 C210 067G 2151097NT KMY50VB1M-TP5 5*11.5 C201 067G215B471 3N GP...
  • Page 48 20" LCD Color Monitor ASUS MW201U C701 067G215Y2207NV KY50VB22M-CC3 5*11 C704 067G215Y2207NV KY50VB22M-CC3 5*11 C705 067G215Y2207NV KY50VB22M-CC3 5*11 CN201 088G 35315F HJ SOC SUBD H 15P F CN202 088G 35424F H DV1 CONNECTOR 24PIN CN202 088G 35424F HL DVI 24PIN FEMALE...
  • Page 49 20" LCD Color Monitor ASUS MW201U C923 065G305M1022BP Y2 1000PF M 250VAC Y5P C921 065G306M4722BP 4700PF +-20% 400VAC C930 067G215L102 3H LOW E.S.R.E.C C914 067G215L102 3H LOW E.S.R.E.C C914 067G215S102 3K ED1000UF 16V C930 067G215S102 3K ED1000UF 16V C915 067G215S4714KL LOW ESR EC 470UF 25V BY 金山...
  • Page 50 20" LCD Color Monitor ASUS MW201U 705G 201 95 01 J904 ASS'Y 705GQAK0 61 01 R914 ASS'Y R908 705GQAK0 61003 R908 ASS'Y PWA62QU1SMTP POWER BOARD FOR SMT 095F S14 S2WB7 WERE HARNESS 095F S14 S2RB7 WERE HARNESS R208 061L0603102 CHIPR 1K OHM +-5% 1/16W...
  • Page 51 20" LCD Color Monitor ASUS MW201U Q106 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q104 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q601 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q602 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q202 057G 759 2 RK7002 Q203 057G 759 2 RK7002 Q204 057G 759 2...
  • Page 52 20" LCD Color Monitor ASUS MW201U R404 061L0603101 CHIPR 100 OHM +-5% 1/16W R706 061L0603101 CHIPR 100 OHM +-5% 1/16W R705 061L0603101 CHIPR 100 OHM +-5% 1/16W R610 061L0603101 CHIPR 100 OHM +-5% 1/16W R609 061L0603101 CHIPR 100 OHM +-5% 1/16W...
  • Page 53 20" LCD Color Monitor ASUS MW201U R215 061L0603222 CHIPR 2.2K OHM+-5% 1/16W R216 061L0603222 CHIPR 2.2K OHM+-5% 1/16W R219 061L0603222 CHIPR 2.2K OHM+-5% 1/16W R222 061L0603222 CHIPR 2.2K OHM+-5% 1/16W R131 061L0603316 2F CHIP 31.6K OHM 1/10W 1% R127 061L0603333...
  • Page 54 20" LCD Color Monitor ASUS MW201U R649 061L0603472 CHIPR 4.7K OHM +-5% 1/16 R645 061L0603472 CHIPR 4.7K OHM +-5% 1/16 R644 061L0603472 CHIPR 4.7K OHM +-5% 1/16 R642 061L0603472 CHIPR 4.7K OHM +-5% 1/16 R640 061L0603472 CHIPR 4.7K OHM +-5% 1/16...
  • Page 55 20" LCD Color Monitor ASUS MW201U R208 061L0603750 9F 75OHM 1% 1/10W R209 061L0603750 9F 75OHM 1% 1/10W R210 061L0603750 9F 75OHM 1% 1/10W R701 061L0805222 CHIP 2.2KOHM 5% 0805 1/8W R129 061L1206000 CHIPR 0 OHM +-5% 1/8W R133 061L1206000...
  • Page 56 20" LCD Color Monitor ASUS MW201U C454 065G0603104 32 CHIP 0.1UF 50V X7R C453 065G0603104 32 CHIP 0.1UF 50V X7R C452 065G0603104 32 CHIP 0.1UF 50V X7R C451 065G0603104 32 CHIP 0.1UF 50V X7R C450 065G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 57 20" LCD Color Monitor ASUS MW201U C304 065G0603104 32 CHIP 0.1UF 50V X7R C305 065G0603104 32 CHIP 0.1UF 50V X7R C306 065G0603104 32 CHIP 0.1UF 50V X7R C118 065G0603105 12 CHIP 1UF 16VX7R 0603 C122 065G0603105 12 CHIP 1UF 16VX7R 0603...
  • Page 58 20" LCD Color Monitor ASUS MW201U L604 071G 56K121 M CHIP BEAD L603 071G 56K121 M CHIP BEAD L602 071G 56K121 M CHIP BEAD L601 071G 56K121 M CHIP BEAD L413 071G 56K121 M CHIP BEAD L412 071G 56K121 M...
  • Page 59 20" LCD Color Monitor ASUS MW201U D206 093G 6433P BAV99 D203 093G 6433P BAV99 D202 093G 6433P BAV99 D201 093G 6433P BAV99 ZD217 093G 39S 34 T UDZS5.6B ZD216 093G 39S 34 T UDZS5.6B ZD201 093G 39S 34 T UDZS5.6B...
  • Page 60 20" LCD Color Monitor ASUS MW201U R914 061G152M22858F RST MOFR 0.22OHM +-5% 2WS 096G 29 6 H.S. TUBE R908 061G152M10458G 100K OHM 5% 2W 096G 29 6 H.S. TUBE IC901 056G 379 71 IC TEA1530AT SO-8 PHILIPS IC801 056G 608 7...
  • Page 61 20" LCD Color Monitor ASUS MW201U R810 061L0805000 CHIPR 0OHM +-5% 1/10W R838 061L0805000 CHIPR 0OHM +-5% 1/10W R845 061L0805000 CHIPR 0OHM +-5% 1/10W R876 061L0805000 CHIPR 0OHM +-5% 1/10W R934 061L0805000 CHIPR 0OHM +-5% 1/10W R806 061L0805100 2F CHIP 10K OHM 1/8W 1%...
  • Page 62 20" LCD Color Monitor ASUS MW201U R935A 061L1206101 CHIP 100 OHM 5% 1/8W R935B 061L1206101 CHIP 100 OHM 5% 1/8W R939 061L1206102 CHIP 1K OHM 5% 1/8W R940 061L1206102 CHIP 1K OHM 5% 1/8W R941 061L1206102 CHIP 1K OHM 5% 1/8W...
  • Page 63 20" LCD Color Monitor ASUS MW201U C860 065G0603103 12 chip 0.01uf 16v x7r C814 065G0603104 32 CHIP 0.1UF 50V X7R C826 065G0603104 32 CHIP 0.1UF 50V X7R C825 065G0603105 12 CHIP 1UF 16VX7R 0603 C813 065G0603105 12 CHIP 1UF 16VX7R 0603...
  • Page 64 20" LCD Color Monitor ASUS MW201U C809 065G1206475 22 4.7U/25V X7R C807 065G1206475 22 4.7U/25V X7R C806 065G1206475 22 4.7U/25V X7R C838 065G1206475 22 4.7U/25V X7R D909 093G 64 44 S LL4148WP D908 093G 64 44 S LL4148WP D903 093G 64 44 S...
  • Page 65 20" LCD Color Monitor ASUS MW201U F903 084G 56 4W FUSE 4.0A 250V F905 084G 56 4W FUSE 4.0A 250V D816 093G 521ZJ26T SB240 D814 093G 521ZJ26T SB240 D813 093G 521ZJ26T SB240 D811 093G 521ZJ26T SB240 D806 093G 521ZJ26T SB240...
  • Page 66: Different Parts List

    20" LCD Color Monitor ASUS MW201U 12. Different Parts List Diversity of TA6CMUMBW8U1AP compared with TA6CMUMTW8USAP Location Part No. for TPV Description Q41G780068016A warranty card-TW 045G 76 28V13 PE BAG FOR MANUAL Q41G780068019A 089G410A18N IS POWER CORD WALL-OUT FOR UK...
  • Page 67 20" LCD Color Monitor ASUS MW201U Diversity of TA6CMUMBW8U1AP compared with TA6CMUMTW8USAP Location Part No. for TPV Description 078G 322 5 KL SPK 8OHM 1.5W 43×18×18.5mm 35mm KUAIDA 078G 322 5 KR SPK 8OHM 1.5W 43×18×18.5mm 135mm KUAI 089G404A18N IS...