20" LCD Color Monitor Dixon N20W Service Service Service Horizontal Frequency TABLE OF CONTENTS Description Page 31 kHz-82 kHz Description Page Table Of Contents.......……..............................…........1 6.Schematic……………......................................17 Revision List.…..................................................……......2 6.1 Main Board……..............................................17 Important Safety Notice.……..............................……......3 6.2 Power Board…....……..
0" LCD Color Monitor Dixon N20W Revision List Version Release Date Revision History TPV Model Name A00 Jun-12-2007 Initial release TA7CMADBW3DXAN A01 Oct-12-2007 Second release TA7CMADBW3DXAG 2
20" LCD Color Monitor Dixon N20W 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. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
20" LCD Color Monitor Dixon N20W 1. Monitor Specifications LCD Panel Resolution Model number N20W Driving system TFT Color LCD Size 510mm ( 20") Pixel pitch 0.258mm(H) x 0.258mm(V) Video R, G, B Analog lnterface Separate Sync. H/V TTL Display Color 16.7 million Colors Dot Clock 146.25 MHz Horizontal scan range 31 kHz - 82 KHz Horizontal scan Size(Maximum) 433.44 mm Vertical scan range 56 Hz - 75 Hz Vertical scan Size(Maximum) 270.
20" LCD Color Monitor Dixon N20W 2. LCD Monitor Description The LCD monitor will contain a main board, a power board, a 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. Monitor Block Diagram Flat Panel and CCFL Drive.
20" LCD Color Monitor Dixon N20W 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected. * Press the power button to turn on the monitor. The power indicator will light up. 3.2 Control Buttons 1. Auto Config 2. Volume up / + 3. Volume down / 4. Menu / Enter 5 .
20" LCD Color Monitor 3.3 OSD Settings Main Menu Item Main Menu Icon Dixon N20W Sub Menu Item Sub Menu Icon Contrast Description Contrast from Digital-register. Luminance Brightness Backlight Adjustment Adjust Picture Phase to reduce Focus Horizontal-Line noise Image Setup Adjust picture Clock to reduce Clock Image Position Vertical-Line noise. Adjust the horizontal position of the H. Position picture. Adjust the vertical position of the V. Position picture.
20" LCD Color Monitor Dixon N20W Adjust the horizontal position of the H. Position OSD Setup OSD. Adjust the vertical position of the V. Position OSD. OSD Timeout Adjust the OSD timeout. Language Language N/A Information Information N/A Select the language you like Show the resolution, H/V frequency and input port of current input timing. Clear each old status of Yes N/A Auto-configuration and set the color temperature to Cool.
20" LCD Color Monitor Dixon N20W 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description 1. Video-Red 9. +5V 2. Video-Green 10. Detect Cable 3. Video-Blue 11. NC 4. NC 12. DDC-Serial Data 5. GND 13. H-Sync 6. GND-R 14. V-Sync 7. GND-G 15. DDC-Serial clock 8. GND-B VGA connector layout 4.2 Factory Preset Display Modes Horizontal Vertical Frequency(KHz) Frequency(Hz) 720 x 400 31.47 70.0 VGA 640 x 480 31.47 60.
20" LCD Color Monitor 4.3 Panel Specification Dixon N20W 4.3.1 General Description CLAA201WA04 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, 4 tubes). By applying 8 bit digital data (6bits+Hi-FRC), 1680×1050, drived by 5 voltages,16.7M-color images are displayed on the 20.1” diagonal screen. The module structure is fixed by iron frame, without the inverter for the backlight.
20" LCD Color Monitor Dixon N20W 4.3.3 Optical Characteristics Ta=25℃，VCC=5.0V 4.3.
20" LCD Color Monitor Dixon N20W (2) Backlight 12
20" LCD Color Monitor Dixon N20W 5. Block Diagram 5.
20" LCD Color Monitor Dixon N20W 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. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light.
20" LCD Color Monitor 5.2 Electrical Block Diagram Dixon N20W 5.2.1 Main Board Panel Interface (CN101) (Include MCU, ADC, OSD) Crystal 14.
20" LCD Color Monitor Dixon N20W 5.2.
20" LCD Color Monitor Dixon N20W 6. Schematic 6.1 Main Board 715G2186-1 +5V SOT-223 3 U701 VI VO C701 0.1uF +3V3 VCTRL +5V 51 2 GND +5V 3,4 D704 SR24 C703 NC C704 NC + 3 NC 1 1 VCC3.3 TO-263 U702 VIN VOUT VCC3.3 ADJ + C712 AIC1084-33PM C713 0.1uF Reservation schematicfor blacklight off have panel on solution. 120 OHM GND C709 + C710 100uF/25V 2 4 6 8 10 12 GND CONN R704 100 1/10W R706 VCC3.
R434 56 1/10W C432 0.047uF 1/10W R435 56 1/10W C433 0.047uF FB412 0 1/10W R436 56 1/10W C434 0.047uF R437 470 1/10W C435 0.001uF R441 100 1/10W C436 0.047uF R442 100 1/10W C437 0.047uF R443 100 1/10W C438 0.047uF R438 75 R440 1/10W 1/10W FB411 0 PC5V PC5V VGA_CON 1/10W DB15 D404 BAV99 D405 BAV99 FB409 10K C441 0.047uF R446 1K R449 22pF 2.
20" LCD Color Monitor Dixon N20W AVDD_33 VDDC AVDD_18AVDD_MEMPLL_33 VDDP VCC3.3 C401 30 0.1uF 54 114 40 59 87 107 112 VDDP VDDP VDDP VDDP VDDP VDDP VDDP 21 58 VDDP 53 74 104 126 TSUMU58WJ REFP 0.22uF 8 7 3 4 U402 2 1 6 5 VDD SDO HOLD# CE# WP# SCK VSS SDI 41 42 43 44 +5V 108 GPIO_P22/PWM1 GPIO_P24/PWM2 LVDS SDO CSZ SCK SDI GPIO_P04 GPIO_P25 GPIO_P00/SAR0 GPIO_P01/SAR1 GPIO_P02/SAR2 GPIO_P03/SAR3 GPIO_P06 GPIO_P07 GPIO_P13/PWM2 RST R501 C421 22pF + 0Ω 1/10W X401 14.
" LCD Color Monitor Dixon N20W CN101 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 4 PB[0..9] 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 PA[0..9] PB[0..
20" LCD Color Monitor 6.2 Power Board Dixon N20W R951 47Ω 1/4W R952 47Ω 1/4W 0.001uF/500V C920 3 R909 100KΩ 2W L902 4 2 C910 1500pF/1KV C916 0.1uF 0.1uF C912 22uF/50V C911 + 7 6 4 11 6 1 R910 7.5Ω 1/4W 8 7 6 5 RT HV COMPNC CS VCC GNDOUT 3 4.0mH C925 470uF/25V R931 10KΩ 1/4W ZD920 PTZ9.1B L922 +5V 3 C926 1000uF/16V + C932 1000UF/16V C927 470uF/16V + 12 47Ω 1/4W R954 C921 0.001uF/500V R955 47Ω 1/4W CONNECTOR Q901 STP10NK700V R915 10KΩ 1/8W C900 0.0022UF 0.
20" LCD Color Monitor Dixon N20W CN801 PT801 7 POWER X'FMR 6 穝糤箂ンC828,C829 +12V R802 300KΩ 1/4W R804 10KΩ 1/4W ON/OFF R805 470Ω 1/4W + C811 470uF/25V Q802 PMBS3904 R803 2 Q801 PMBS3904 Q803 PMBS3904 VCC 3 4 R818 15Ω 1/4W R819 15Ω 1/4W C813 0.0015uF/50V 0.0015uF/50V R821 R822 3MΩ 1/2W R825 C836 1 C818 270pF 560Ω 1/8W 0Ω 1/4W D802 2 Q805 AM9945N-T1-PF 1 6 7 2 3 R820 15KΩ 1/8W G S C831 270pF R827 3.
20" LCD Color Monitor Dixon N20W 7. PCB Layout 7.
20" LCD Color Monitor Dixon N20W 24
20" LCD Color Monitor Dixon N20W 25
20" LCD Color Monitor 7.
20" LCD Color Monitor Dixon N20W 27
20" LCD Color Monitor Dixon N20W 28
20" LCD Color Monitor 7.3 Audio Board Dixon N20W 715G2098-1 7.
20" LCD Color Monitor Dixon N20W 8. Maintainability 8.1 Equipments And Tools Requirement 1. Voltmeter. 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.
20" LCD Color Monitor 8.2 Trouble Shooting Dixon N20W 8.2.1 Main Board No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal NG Reinsert or check the Adapter/Inverter section NG Check CN701 or replace U702,Q702 or D701 OK Measure U702 PIN2=3.3V D701 (-) =1.
20" LCD Color Monitor Dixon N20W No picture Measure U702 PIN2=3.3V D701(-)=1.
20" LCD Color Monitor Dixon N20W (3) White screen White screen Measure Q706 base NG is high level? OK X401 oscillate waveform is normal NG OK Replace X401 Check Q706, Q705,Q704 are broken or CN101 solder? Check reset circuit of U401 is normal NG Check Correspondent component. NG OK OK Replace Panel Replace U401 33 Check Correspondent component.
20" LCD Color Monitor Dixon N20W 8.2.2 Power/Inverter Board 1.
20" LCD Color Monitor Dixon N20W 2.
20" LCD Color Monitor Dixon N20W 8.2.
20" LCD Color Monitor Dixon N20W 9. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding White-Balance adjustment. 1. How to do the Chroma-7120 MEM. Channel setting A. Reference to chroma 7120 user guide B. Use “SC” key and “NEXT” key to modify X yY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust 2. Setting the color temp. you want A. MEM.CHANNEL 3 (Warm color): 6500 color temp.
20" LCD Color Monitor Dixon N20W C. Adjust sRGB color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 313 ±20, y = 329 ±20, Y = 180 cd/m2 4. Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R=100 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 6.
20" LCD Color Monitor Dixon N20W 10.
20" LCD Color Monitor Parts List Item Description Dixon N20W Item Description Item Description 1 BEZEL 11 SCREW 21 HINGE 2 LENS 12 SCREW 22 SCREW 3 KEY BUTTON 13 IO BRACKET 23 SCREW 4 KEY BOARD 14 SCREW 24 SCREW 5 MAIN FRAME 15 REAR COVER(20") 25 STAND REAR COVER 6 LCD PANEL 16 VESA BKT 26 BASE 7 SCREW M3X6 17 N/A 27 RUBBER 8 POWER BOARD 18 SCREW 28 CABLE PLATE 9 MAIN BOARD 19 SCREW 29 SCREW 10 AUDIO BOARD 20 STAND REAR COVER 40
20" LCD Color Monitor Dixon N20W 11. BOM List TA7CMADBW3DXAN Location Part No. Description 044G9003194 CORNER PAPER 050G 600 2 HANDLE1 050G 600 3 HANDLE2 052G 1185 MIDDLE TAPE 052G 1186 SMALL TAPE 078G 322 6 Y SPK 8OHM 1.
20" LCD Color Monitor Dixon N20W 040G 581 26605 LABEL-P/N U201 056G 616 31 IC TDA7496T 1.
20" LCD Color Monitor Dixon N20W C702 067G215Y479 7N LOW ESR EC 4.7 UF 50V NC C403 067G215Y479 7N LOW ESR EC 4.7 UF 50V NC CN405 088G 35315F H D-SUB 15PIN X401 093G 2253B J1 XTL NXS14.
20" LCD Color Monitor Dixon N20W R488 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R704 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R412 061G0603102 RST CHIP 1K 1/10W 5% R430 061G0603102 RST CHIP 1K 1/10W 5% R446 061G0603102 RST CHIP 1K 1/10W 5% R447 061G0603102 RST CHIP 1K 1/10W 5% R701 061G0603102 RST CHIP 1K 1/10W 5% R452 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R484 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R485 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R487 061G0603103 RST CHIP
20" LCD Color Monitor Dixon N20W R405 061G0603223 RST CHIPR 22 KOHM +-5% 1/10W R403 061G0603390 0F RST CHIPR 390 OHM +-1% 1/10W R475 061G0603392 RST CHIPR 3.9 KOHM +-5% 1/10W R474 061G0603392 RST CHIPR 3.9 KOHM +-5% 1/10W R437 061G0603471 RST CHIPR 470 OHM +-5% 1/10W R725 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R712 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R707 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R705 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R433 061G0603472 RST CHIPR 4.
20" LCD Color Monitor Dixon N20W C719 065G0603104 32 CHIP 0.1UF 50V X7R C721 065G0603104 32 CHIP 0.1UF 50V X7R C456 065G0603104 32 CHIP 0.1UF 50V X7R C419 065G0603104 32 CHIP 0.1UF 50V X7R C420 065G0603104 32 CHIP 0.1UF 50V X7R C422 065G0603104 32 CHIP 0.1UF 50V X7R C426 065G0603104 32 CHIP 0.1UF 50V X7R C427 065G0603104 32 CHIP 0.1UF 50V X7R C428 065G0603104 32 CHIP 0.1UF 50V X7R C429 065G0603104 32 CHIP 0.1UF 50V X7R C430 065G0603104 32 CHIP 0.
20" LCD Color Monitor Dixon N20W FB408 071G 56Z601 CHIP BEAD 600 OHM 0805 FB407 071G 56Z601 CHIP BEAD 600 OHM 0805 FB405 071G 56Z601 CHIP BEAD 600 OHM 0805 FB404 071G 56Z601 CHIP BEAD 600 OHM 0805 FB403 071G 56Z601 CHIP BEAD 600 OHM 0805 FB402 071G 56Z601 CHIP BEAD 600 OHM 0805 FB401 071G 56Z601 CHIP BEAD 600 OHM 0805 FB409 071G 59B121 TB160808B D424 093G 64 33 DIO SIG SM BAV99 (PHSE)R D405 093G 64 33 DIO SIG SM BAV99 (PHSE)R D404 093G 64 33 DIO SIG SM BAV99 (PHSE)R D403
20" LCD Color Monitor Dixon N20W C825 065G 3J1506ET 15PF 5% CC45SL 3KV TDK C826 065G 3J3096ET 3PF,J,3KV,Z5P C817 065G 3J3096ET 3PF,J,3KV,Z5P C901 065G305M1022EM Y2 1000PF +-20% 250VAC C902 065G305M1022EM Y2 1000PF +-20% 250VAC C903 065G305M1022EM Y2 1000PF +-20% 250VAC C904 065G305M1022EM Y2 1000PF +-20% 250VAC C900 065G306M2222BP 2200PF +-20% 400VAC C927 067G215L4713HL 470UF 16V HERMEI C907 067G215S10115K 100UF 450V C926 067G215V1023HS CAP L105℃ 1000UF M 16V C932 067G215
20" LCD Color Monitor HS5 Dixon N20W Q90G0062 1 HEAT SINK IC901 056G 379 61 LD7575PS SOP-8 IC801 056G 608 10 IC OZ9938GN-B SOIC-16 Q803 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q802 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q801 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q805 057G 763 14 AM9945N Q806 057G 763 14 AM9945N R837 061G0805100 10 OHM 1/10W R842 061G0805100 10 OHM 1/10W R831 061G0805100 3F RST CHIPR 100KOHM +-1% 1/8W R821 061G0805100 3F RST CHIPR 100KOHM +-1% 1/8W R927 061G08051
20" LCD Color Monitor Dixon N20W R835 061G0805561 560 0805 R814 061G0805563 56KOHM 1/10W C835 061G1206000 RST CHIPR 0 OHM +-5% 1/4W C836 061G1206000 RST CHIPR 0 OHM +-5% 1/4W C837 061G1206000 RST CHIPR 0 OHM +-5% 1/4W C838 061G1206000 RST CHIPR 0 OHM +-5% 1/4W F902 061G1206000 RST CHIPR 0 OHM +-5% 1/4W F903 061G1206000 RST CHIPR 0 OHM +-5% 1/4W RJ801 061G1206000 RST CHIPR 0 OHM +-5% 1/4W RJ901 061G1206000 RST CHIPR 0 OHM +-5% 1/4W RJ902 061G1206000 RST CHIPR 0 OHM +-5% 1/4W
20" LCD Color Monitor Dixon N20W C912 065G0805104 32 CHIP 0.1U 50V X7R C806 065G0805105 22 CHIP 1UF 25V X7R 0805 C812 065G0805152 32 CHIP 1500PF 50V X7R 0805 C813 065G0805152 32 CHIP 1500PF 50V X7R 0805 C822 065G0805152 32 CHIP 1500PF 50V X7R 0805 C823 065G0805152 32 CHIP 1500PF 50V X7R 0805 C913 065G0805221 32 CHIP 220PF 50V X7R 0805 C819 065G0805223 22 CHIP 0.022UF 25V X7R 080 C804 065G0805225 12 CHIP 2.
20" LCD Color Monitor HS6 Dixon N20W Q52G6025 13 76 MYLAR Q85G0043 1 S SHIELD Q15G0128 4 MAIN FRAME_CPT Q15G0129 1 IO BRACKET Q15G0156 1 CABLE PLATE Q26G 800504 2 BAR CODE LABEL Q40G 20N61515A RATING LABEL Q40G000261562A POP LABEL Q40G000267311A WINDOW VISTA LABEL Q41G780062444A QSG Q44G6000 116A EMPTY CARTON Q44G6000 117A EMPTY CARTON Q44G6002118 97 PAPER BOARD Q44GA024 1 EPS(L) Q44GA024 2 EPS(R) Q44GA024600 1A 20 LCD NO BRAND CARTON Q45G 88606 S R PE BAG FOR BASE Q45G
20" LCD Color Monitor Dixon N20W 12. Different Parts List Diversity of TA7CMADBW3DXAG compared with TA7CMADBW3DXAN Location Part No.
