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Asus MW221 Service Manual

22" lcd color monitor
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22" 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.......................................................15
5.1.Software Flow Chart...........................................15
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...........................17
6.Schematic.....................................................19
6.1 Main Board.............................................19
6.2 Power Board..............................................23
7.PCB Layout.....................................................25
7.1.Main Board.................................................25
7.2.Power Board..........................................28
7.3 Audio Board.................................................31
7.4.Key Board....................................................31
8.Maintainability................................................32
8.2.Trouble Shooting..........................................33
10.Monitor Explode View.................................41
11.BOM List...................................................42
12.Different Parts List....................................58
SAFETY NOTICE
1
ASUS MW221
Horizontal Frequency
30-83 KHz
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  Summary of Contents for Asus MW221

  • Page 1: Table Of Contents

    22" LCD Color Monitor ASUS MW221 Service Service Service Horizontal Frequency 30-83 KHz TABLE OF CONTENTS Description Page Description Page 5.2.Electrical Block Diagram……………..…..17 Table Of Contents..……......…..1 Revision List.…........……..2 6.Schematic……………........19 6.1 Main Board..........19 Important Safety Notice.……....……..3 1.Monitor Specification......………..4 6.2 Power Board..……........23 2.LCD Monitor Description……………………………..5...
  • Page 2: Revision List

    22" LCD Color Monitor ASUS MW221 Revision List Version Release Date Revision History TPV Model Name TC6MM1DTW8USDP Feb.13,2007 Initial release TC6AMADTW8USAP...
  • Page 3: Important Safety Notice

    22" LCD Color Monitor ASUS MW221 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

    22" LCD Color Monitor ASUS MW221 1. Monitor Specifications Driving system TFT Color LCD Size 55.87cm(22") Pixel pitch 0.282mm( H )x 0.282mm( V ) LCD Panel Response time (type) 5ms for CMO panel Viewable angle 170˚ (H) 160˚ (V) Video R,G,B Analog Interface Sync.
  • Page 5: Lcd Monitor Description

    22" LCD Color Monitor ASUS MW221 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

    22" LCD Color Monitor ASUS MW221 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 22" LCD Color Monitor ASUS MW221 3.2.2 Key Function...
  • Page 8: Osd Menu

    22" LCD Color Monitor ASUS MW221 3.3 OSD Menu 3.3.1 How to Reconfigure 3.1.2 OSD Function Introduction...
  • Page 9 22" LCD Color Monitor ASUS MW221...
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  • Page 11: Input/Output Specification

    22" LCD Color Monitor ASUS MW221 4. Input/Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Video Green Video Detect Cable Blue Video DDC-Serial Data H-Sync Red Ground V-Sync Green Ground DDC-Serial Clock Blue Ground...
  • Page 12: Factory Preset Display Modes

    22" LCD Color Monitor ASUS MW221 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

    22" LCD Color Monitor ASUS MW221 4.4 Panel Specification 4.4.1 General Features The M220Z1-L01 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin 2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays up to 16.7 millions colors.
  • Page 14 22" LCD Color Monitor ASUS MW221 4.4.4 Optical Characteristics 4.4.5 Electrical Characteristics (1) TFT-LCD (2) Backlight...
  • Page 15: Block Diagram

    22" LCD Color Monitor ASUS MW221 5. Block Diagram 5.1 Software Flow Chat...
  • Page 16 22" LCD Color Monitor ASUS MW221 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 17: Electrical Block Diagram

    22" LCD Color Monitor ASUS MW221 5.2 Electrical Block Diagram 5.2.1 Main Board Panel Interface (CN101) Key Control Scalar TSUMU58WHJ-LF Flash Memory Interface (Include MCU, ADC, OSD) PM25LV010-25 SCE (CN403) (U401) (U402) H sync V sync Crystal EEPROM 14.318MHZ 24LC16B/SNG...
  • Page 18 22" LCD Color Monitor ASUS MW221 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R927、R928、R929 CN903 Feedback Circuit Control IC ON/OFF Output MOSFET Circuit Transformer Lamp Over ON/OFF Feedback Voltage Control Circuit...
  • Page 19: Schematic

    22" LCD Color Monitor ASUS MW221 6. Schematic 6.1 Main Board 715G2186-1 VCTRL SOT-223 R702 +3V3   1/10W U701 D704 VCC1.8 SR24 TO-263 VCC3.3 C702 4.7uF/50V VCC1.8 4 C701 C703 C704 U702 D701 VCC3.3 VOUT 0.1uF C712 C714 GS1D C713...
  • Page 20 22" LCD Color Monitor ASUS MW221 CN405 RED+ FB410 0 1/10W R434 1/10W C432 0.047uF     RED- GREEN+ FB411 0 1/10W R435 1/10W C433 0.047uF     GREEN- BLUE+ FB412 0 1/10W R436 1/10W C434 0.047uF     BLUE-...
  • Page 21 22" LCD Color Monitor ASUS MW221 AVDD_33 VDDC VDDP AVDD_18 AVDD_MEMPLL_33 VCC3.3 FB403 VDDP VCC3.3 VCC3.3 FB405 AVDD_MEMPLL_33 600 OHM C408 600 OHM 10uF/50V VCC3.3 VCTRL VCTRL C416 C409 C410 C411 C412 C413 C419 C420 C461 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 22: Panel Interface

    22" LCD Color Monitor ASUS MW221 CN101 PA[0..9] PA[0..9] LVA3P LVB0M RXO0- RXO0+ LVB0P LVA3M LVB1M RXO1- RXO1+ LVB1P LVACKP LVB2M RXO2- RXO2+ LVB2P LVACKM LVBCKM RXOC- RXOC+ LVBCKP LVA2P LVB3M RXO3- RXO3+ LVB3P LVA2M LVA0M RXE0- RXE0+ LVA0P LVA1P...
  • Page 23: Power Board

    22" LCD Color Monitor ASUS MW221 6.2 Power Board 715G2101-2 R905   1/4W J928 R906 100   1/4W 0  J927 C908 0.001uF R907 100   1/4W T901 0  D901 POWER X'FMR 95G 90 23 R927 4.7K 1/4W D907   R940...
  • Page 24 22" LCD Color Monitor ASUS MW221 CN801 C801 5pF/3KV OPT2 T801 CONN C807 1uF +24V C809 C820 D801 R801 0.0047uF R804 BAV99 2.4KΩ 1/4W R802 C847 D820 C808 N.C 1KΩ 1/8W   1/4W 0.1uF R806 ZD802 ZD801 R805 RB050L-40 POWER X'FMR 10KΩ...
  • Page 25: Pcb Layout

    22" LCD Color Monitor ASUS MW221 7. PCB Layout 7.1 Main Board 715G2186-1...
  • Page 26 22" LCD Color Monitor ASUS MW221...
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  • Page 28: Power Board

    22" LCD Color Monitor ASUS MW221 7.2 Power Board 715G2101-2...
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  • Page 31: Audio Board

    22" LCD Color Monitor ASUS MW221 7.3 Audio Board 715G2098-1 7.4 Key Board 715G2099-1...
  • Page 32: Maintainability

    22" LCD Color Monitor ASUS MW221 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 33: Trouble Shooting

    22" LCD Color Monitor ASUS MW221 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 U702 PIN2=3.3V...
  • Page 34 22" LCD Color Monitor ASUS MW221 (2). No Picture No picture Measure U702 PIN2=3.3V D701(-)=1.8V Replace U702, Q702 or D701 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable Input the sync signal of...
  • Page 35 22" LCD Color Monitor ASUS MW221 (3). White screen White screen Measure Q704 base X401 oscillate waveform is normal is high level? Replace X401 Check Q704 is broken or CN101 solder? Check reset circuit of U401 is normal Check Correspondent Check Correspondent component.
  • Page 36 22" LCD Color Monitor ASUS MW221 8.2.2 Power/Inverter Board 1.) No power Check CN903 pin2, 4 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C912 (+) Check bridge rectified circuit and F901 circuit...
  • Page 37 22" LCD Color Monitor ASUS MW221 2.) W / LED, No Backlight Check CN903 pin2 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 pin5=12V Change Q801 or Q802 Check IC801 PIN18, 17 have the output of square wave at short...
  • Page 38 22" LCD Color Monitor ASUS MW221 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 39: White-Balance, Luminance Adjustment

    = 313 ±20, y = 329 ±20, Y= 150 ±20cd/m 3. Into Factory mode of ASUS MW221: 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 40 22" LCD Color Monitor ASUS MW221 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 41: Monitor Explode View

    22" LCD Color Monitor ASUS MW221 10. Monitor Exploded View...
  • Page 42: Bom List

    22" LCD Color Monitor ASUS MW221 11. BOM List TC6MM1DTW8USDP Location Part No. for TPV Description 040G 457834 4A GP S/N LABEL FOR ID 040G 581680 1A WARRANTY LABEL 040G 582680 1A CARTON LABEL 040G 582680 4A CARTON LABEL 045G 76 28V13...
  • Page 43 22" LCD Color Monitor ASUS MW221 0Q1G 330 8120 SCREW 3X8mm 0Q1G 330 8120 SCREW 3X8mm 0Q1G1030 8120 SCREW 705GQCK0F34005 22" LCD BEZEL-STAND COVER-BASE ASS'Y 750GLMC0Z1111N PANEL LCD M220Z1-L01 CMO A15G0028 1 VESA BKT A15G0077AS1 2 MAIR FRAME(CMO) A15G0078 2 2...
  • Page 44 22" LCD Color Monitor ASUS MW221 Q41G780068021B east qsg Q70G2201680 1B cd manual 0Q1G 130 6120 SCREW (T3X6) 0Q1G1030 8120 SCREW A27G0002 2 BASE PLATE A27G0003 2 KEY PLATE A33G0063 1 1C LENS A34G0101 GM 1B STAND A34G0102 GM 1B 20...
  • Page 45 22" LCD Color Monitor ASUS MW221 SW101 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW104 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW102 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW105 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW103 077G 605 1 CJ...
  • Page 46 22" LCD Color Monitor ASUS MW221 L901 073G 174 65 H LINE FILTER L901 073G 174 65 LS LINE FILTER BY LISHIN L954 073G 253171 LS CHOKE COIL 3.3UH L954 073G 253171 YS IND CHOKE 2.13uH+-20% TOP NATION L904 073L 253156 LH...
  • Page 47 22" LCD Color Monitor ASUS MW221 U403 056G113356A 24LC16B/SNG SOIC-8PIN Q402 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q407 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q701 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q703 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q706 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q401 057G 417 6 PMBS3906/PHILIPS-SMT(06)
  • Page 48 22" LCD Color Monitor ASUS MW221 R723 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R404 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R406 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R408 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R413 061G0603103...
  • Page 49 22" LCD Color Monitor ASUS MW221 R725 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R431 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R702 061G0603510 RST CHIPR 51 OHM +-5% 1/10W R434 061G0603560 RST CHIPR 56 OHM +-5% 1/10W R435 061G0603560 RST CHIPR 56 OHM +-5% 1/10W...
  • Page 50 22" LCD Color Monitor ASUS MW221 C444 065G0603104 32 CHIP 0.1UF 50V X7R C430 065G0603104 32 CHIP 0.1UF 50V X7R C429 065G0603104 32 CHIP 0.1UF 50V X7R C428 065G0603104 32 CHIP 0.1UF 50V X7R C427 065G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 51 22" LCD Color Monitor ASUS MW221 D409 093G 39147SEM ZMM5V6ST D408 093G 39147SEM ZMM5V6ST D406 093G 39147SEM ZMM5V6ST D406 093G 39149 MLL5232B BY FULL POWER SMT D408 093G 39149 MLL5232B BY FULL POWER SMT D409 093G 39149 MLL5232B BY FULL POWER SMT...
  • Page 52 22" LCD Color Monitor ASUS MW221 R957 061G152M22158F RST MOFR 220OHM +-5% 2W 096G 29 6 H.S. TUBE CN801 033T800913Z H PIN HEADER 1*13 R/A C806 067T215Y4713NV LOW ESR 470UF 16V NCC C807 067T215Y4713NV LOW ESR 470UF 16V NCC C806 067T215Y4713RV EC 105℃...
  • Page 53 22" LCD Color Monitor ASUS MW221 R904 061G0603330 2F RST CHIPR 33 KOHM +-1% 1/10W R827 061G0603330 2F RST CHIPR 33 KOHM +-1% 1/10W R824 061G0603393 RST CHIPR 39 KOHM +-5% 1/10W R830 061G0603510 2F RST CHIPR 51 KOHM +-1% 1/10W...
  • Page 54 22" LCD Color Monitor ASUS MW221 R907 061G1206101 100 1206 R917 061G1206103 10 KOHM 1/8W R9759 061G1206202 RST CHIPR 2 KOHM +-5% 1/4W R9757 061G1206202 RST CHIPR 2 KOHM +-5% 1/4W R801 061G1206242 RST CHIPR 2.4 KOHM +-5% 1/4W R964...
  • Page 55 22" LCD Color Monitor ASUS MW221 C830 065G0603682 32 CHIP 0.0068UF 50V X7R 0603 C835 065G0603682 32 CHIP 0.0068UF 50V X7R 0603 C818 065G0805105 22 CHIP 1UF 25V X7R 0805 C819 065G0805105 22 CHIP 1UF 25V X7R 0805 C823 065G0805105 22...
  • Page 56 22" LCD Color Monitor ASUS MW221 ZD802 093G 39S 24 T RLZ 5.6B LLDS ZD801 093G 39S 24 T RLZ 5.6B LLDS D950 093G 39S 99 T TVS SMAJ24A SMA D827 093G3004 4 RB050L-40 D826 093G3004 4 RB050L-40 D821 093G3004 4...
  • Page 57 22" LCD Color Monitor ASUS MW221 C912 006G 31502 1.5MM RIVET T901 006G 31502 1.5MM RIVET Q902 006G 31502 1.5MM RIVET TL951 056G 158 2 T TL431ACLPR TO-92 3PIN TL951 056G 158 4 T H431BA Q958 057G 566 1 2N5060RLRAG...
  • Page 58: Different Parts List

    22" LCD Color Monitor ASUS MW221 12. Different Parts List Diversity of TC6AMADTW8USAP compared with TC6MM1DTW8USDP Location Part No. for TPV Description 089G 17356T553 AUDIO CABLE 089G 17356X553 AUDIO CABLE 089G 728CAA D1 SIGNAL CABLE D-SUB COMLINK 095G801414T673 HARNESS 14P-14P 90MM...