Table of Contents
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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.........................................6
3.Operation Instruction.................................................7
3.1.General Instructions..................................................7
3.2.Control Button......................................................7
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.Panel Specification...............................................13
5.Block Diagram.........................................................15
5.1.Software Flow Chart...........................................15
5.2.Electrical Block Diagram.....................................17
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
6.Schematic.....................................................19
6.1 Main Board...........................................................19
6.2 Power Board........................................................23
6.3 Audio Board.......................................................25
7.PCB Layout.....................................................26
7.1.Main Board.........................................................26
7.2.Power Board......................................................29
7.3 Audio Board.........................................................32
7.4.Key Board...........................................................32
8.Maintainability................................................33
8.1.Equipments and Tools Requirement......................33
8.2.Trouble Shooting.................................................34
9.White-Balance, Luminance adjustment...................40
10.Monitor Exploded View......................................42
11.BOM List........................................................43
SAFETY NOTICE
1
AOC 212Va
Horizontal Frequency
31.5 kHz - 80 KHz
Page
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Summary of Contents for AOC 212Va
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Page 1: Table Of Contents
22" LCD Color Monitor AOC 212Va Service Service Service Horizontal Frequency 31.5 kHz - 80 KHz TABLE OF CONTENTS Description Page Description Page 6.Schematic……………........19 Table Of Contents..……........…..1 Revision List.…...........……..2 6.1 Main Board…….............19 6.2 Power Board..……..........23 Important Safety Notice.……......……..3 6.3 Audio Board.....……........25 1.Monitor Specification........………..4... -
Page 2: Revision List
22" LCD Color Monitor AOC 212Va Revision List Version Release Date Revision History TPV Model Name May.10, 2007 Initial release TC6MMADQWJAO8... -
Page 3: Important Safety Notice
AOC 212Va 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. -
Page 4: Monitor Specification
22" LCD Color Monitor AOC 212Va 1. Monitor Specifications Model number 212Va Driving system TFT Color LCD Size 559mm ( 22" 16:10) Pixel pitch 0.282mm(H) x 0.282mm(V) LCD Panel Video R, G, B Analog lnterface Separate Sync. H/V TTL Display Color 16.7 million Colors... - Page 5 22" LCD Color Monitor AOC 212Va Operating 10% to 85% (non-condensing) Non-Operating 5% to 80% (non-condensing) Altitude: Operating 0~ 3000m (0~ 10000 ft ) Non-Operating 0~ 5000m (0~ 15000 ft ) Regulations CE/TCO03...
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Page 6: Lcd Monitor Description
22" LCD Color Monitor AOC 212Va 2. LCD Monitor Description The LCD monitor will contain a main board, a power board, key board and 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 7: Operation Instruction
22" LCD Color Monitor AOC 212Va 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 8: Osd Menu
22" LCD Color Monitor AOC 212Va 1. Power 2. Audio 3. DVI 4. Analog Turn off your computer before performing the procedure below. 1. Connect the power cable to the AC port on the back of the monitor. 2. Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the computer's D-Sub port. - Page 9 22" LCD Color Monitor AOC 212Va Function Control Illustration Luminance Adjust Range Description Brightness 0-100 Backlight Adjustment Contrast 0-100 Contrast from Digital-register. Standard Standard Mode Text Text Mode Eco mode Internet Internet Mode Game Game Mode Movie Movie Mode Sports...
- Page 10 22" LCD Color Monitor AOC 212Va Color Boost Full Enhance on or off Disable or Enable Full Enhance Mode Nature Skin on or off Disable or Enable Nature Skin Mode Green Field on or off Disable or Enable Green Field Mode...
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Page 11: Input/Output Specification
22" LCD Color Monitor AOC 212Va 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description Video-Red Video-Green Detect Cable Video-Blue DDC-Serial Data H-Sync GND-R V-Sync GND-G DDC-Serial clock GND-B VGA connector layout Pin No. Signal Name Pin No. -
Page 12: Factory Preset Display Modes
22" LCD Color Monitor AOC 212Va 4.2 Factory Preset Display Modes Horizontal Vertical Stand Resolution Frequency(KHz) Frequency(Hz) Dos-mode 720 x 400 31.47 70.0 640 x 480 31.47 60.0 640 x 480 37.50 75.0 SVGA 800 x 600 37.879 60.0 SVGA 800 x 600 46.875... -
Page 13: Panel Specification
22" LCD Color Monitor AOC 212Va 4.3 Panel Specification 4.3.1 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 AOC 212Va 4.3.4 Optical Characteristics 4.3.5 Electrical Characteristics (1) TFT- LCD (2) Backlight...
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Page 15: Block Diagram
22" LCD Color Monitor AOC 212Va 5. Block Diagram 5.1 Software Flow Chat... - Page 16 22" LCD Color Monitor AOC 212Va 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.
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Page 17: Electrical Block Diagram
22" LCD Color Monitor AOC 212Va 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 Digital Video V sync Signal EEPROM Crystal 14.318MHZ... - Page 18 22" LCD Color Monitor AOC 212Va 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904, R932, R933 CN902 Feedback Circuit Control IC ON/OFF Output MOSFET Circuit Transformer Lamp Over ON/OFF Feedback Voltage...
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Page 19: Schematic
22" LCD Color Monitor 212Va 6. Schematic 6.1 Main Board 715G2186-1 VCTRL R702 SOT-223 +3V3 1/10W U701 D704 VCC1.8 SR24 VCC3.3 C702 TO-263 4.7uF/50V VCC1.8 4 C701 C703 C704 U702 D701 VCC3.3 VOUT 0.1uF C712 C714 GS1D C713 AIC1084-33PM... - Page 20 22" LCD Color Monitor 212Va 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- PC5V R437 ...
- Page 21 22" LCD Color Monitor 212Va 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 0.1uF...
- Page 22 22" LCD Color Monitor 212Va 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 LVA1M...
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Page 23: Power Board
22" LCD Color Monitor 212Va 6.2 Power Board 715G2210-1 R921 F902 1/4W C913 R922 +12V 1/4W R923 0.001uF L904 FUSE 1/4W C917 3.5uH R940 ZD920 C918 C919 RLZ13B C920 F904 0.1uF 1/4W D906 C922 R943... - Page 24 D816 NC 200K 1/4W 1/10W C843 D818 LL4148WP 100P 50V C812 D820 470P 50V BAV99 D819 Q813 RK7002 AOC (Top Victory) Electronics Co., Ltd. R851 R852 Title 4.7K 1/8W 1/8W PWPCC42MO1P Size Document Number Custom Date: Sheet...
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Page 25: Audio Board
22" LCD Color Monitor 212Va 6.3 Audio Board 715G1566-2 C602 0.001uF ROUT- ROUT+ C603 FB602 C604 AVDD NC/0.001uF FB604 NC/0.001uF +12V FB601 600 OHM 600 OHM R603 120K 1/10W 600OHM C634 NC C643 R624 NC/0 1/10W MUTE C606... -
Page 26: Pcb Layout
22" LCD Color Monitor AOC 212Va 7. PCB Layout 7.1 Main Board 715G2186-1... - Page 27 22" LCD Color Monitor AOC 212Va...
- Page 28 22" LCD Color Monitor AOC 212Va...
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Page 29: Power Board
22" LCD Color Monitor AOC 212Va 7.2 Power Board 715G2210 1 IO... - Page 30 22" LCD Color Monitor AOC 212Va...
- Page 31 22" LCD Color Monitor AOC 212Va...
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Page 32: Audio Board
22" LCD Color Monitor AOC 212Va 7.3 Audio Board 715G1566 2 7.4 Key Board... -
Page 33: Maintainability
22" LCD Color Monitor AOC 212Va 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 34: Trouble Shooting
22" LCD Color Monitor AOC 212Va 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 35 22" LCD Color Monitor AOC 212Va (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 36 22" LCD Color Monitor AOC 212Va (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 37 22" LCD Color Monitor AOC 212Va 8.2.2 Power/Inverter Board 1.) No power Check CN902 Pin10/11/12 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit...
- Page 38 22" LCD Color Monitor AOC 212Va 2.) W / LED, No Backlight Check CN902 PIN6/7=5V&PIN10/11=12V? Check and Debug Primary side circuit Check CN902 PIN3>3.3V? Check and Debug Main board Check IC801 PIN3/PIN5=5V? Check and Debug Q804/Q802/Q803 circuit Check IC801 pin11/pin12/pin19/pin20...
- Page 39 22" LCD Color Monitor AOC 212Va 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?
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Page 40: White-Balance, Luminance Adjustment
= 313 ±20, y = 329 ±20, Y= 180±20cd/m 3. Into Factory mode of AOC 212Va: 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 41 22" LCD Color Monitor AOC 212Va C. Adjust Cool (9300K) 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 = 283 ±20, y = 297 ±20, Y=180±20cd/ m 4.
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Page 42: Monitor Exploded View
22" LCD Color Monitor AOC 212Va 10. Monitor Exploded View... -
Page 43: Bom List
22" LCD Color Monitor AOC 212Va 11. BOM List TC6MMADQWJAO8 Location Part No. Description 007G 5 1 A COMPOUND PALLET 007G 5 10 1 COMPOUND PALLET 011G6039 2 WIRE HOLDER 026G 800504 3 BARCODE LABEL 040G 154501 1 HI-POT GND LABEL... - Page 44 22" LCD Color Monitor AOC 212Va A37G0007 7A HINGE AM1G1740 10120 SCREW(M4*8) AQ1G1740 12120 SCREW Q15G0020 1 BASE BRACKET 750GLMC0Z1111N PANEL LCD M220Z1-L01 CMO 750GLMC0Z1112N PANEL LCD M220Z1-L01 CMO A15G0028 1 VESA BKT A15G0153 3CKD MAIN FRAME A15G0156 1 22W_IO_BKT...
- Page 45 22" LCD Color Monitor AOC 212Va C608 065G0603103 32 0.01UF +-10% 50V X7R C607 065G0603103 32 0.01UF +-10% 50V X7R C628 065G0603104 12 CER2 0603 X7R 16V 100N P C627 065G0603104 12 CER2 0603 X7R 16V 100N P C621 065G0603104 12...
- Page 46 22" LCD Color Monitor AOC 212Va C710 067G215L101 4N KY25VB100M-L 6.3*11 C712 067G215L101 4N KY25VB100M-L 6.3*11 C717 067G215L101 4N KY25VB100M-L 6.3*11 C408 067G215Y100 7N KY50VB10M-L 5*11 C418 067G215Y100 7N KY50VB10M-L 5*11 C722 067G215Y2207NV KY50VB22M-CC3 5*11 C720 067G215Y2207NV KY50VB22M-CC3 5*11 C464...
- Page 47 22" LCD Color Monitor AOC 212Va R464 061G0603100 RST CHIPR 10 OHM +-5% 1/10W R465 061G0603100 RST CHIPR 10 OHM +-5% 1/10W R466 061G0603100 RST CHIPR 10 OHM +-5% 1/10W R467 061G0603100 RST CHIPR 10 OHM +-5% 1/10W R468 061G0603100...
- Page 48 22" LCD Color Monitor AOC 212Va R492 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 AOC 212Va 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 4.7KOHM +-5% 1/10W...
- Page 50 22" LCD Color Monitor AOC 212Va C451 065G0603104 32 CHIP 0.1UF 50V X7R C452 065G0603104 32 CHIP 0.1UF 50V X7R C453 065G0603104 32 CHIP 0.1UF 50V X7R C454 065G0603104 32 CHIP 0.1UF 50V X7R C455 065G0603104 32 CHIP 0.1UF 50V X7R...
- Page 51 22" LCD Color Monitor AOC 212Va C438 065G0603473 32 CHIP 0.047UF 50V X7R C439 065G0603473 32 CHIP 0.047UF 50V X7R C440 065G0603473 32 CHIP 0.047UF 50V X7R C441 065G0603473 32 CHIP 0.047UF 50V X7R L703 071G 56K121 CHIP BEAD L702...
- Page 52 22" LCD Color Monitor AOC 212Va D704 093G2004 2 SR24/PANJIT-SMT 715G2186 1 MAIN BOARD PCB KEPC6Q99 KEY BOARD SW105 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW104 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW103 077G 600 1GCJ TACT SWITCH TSPB-2 -NP...
- Page 53 22" LCD Color Monitor AOC 212Va C832 067G215S1023KV 105℃ 1000UF M 16V C803 067G215S1023KV 105℃ 1000UF M 16V C803 067G215Y1023HS ELCAP 105℃ 1000UF M 16V C832 067G215Y1023HS ELCAP 105℃ 1000UF M 16V C914 067G215Y1023HS ELCAP 105℃ 1000UF M 16V C915 067G215Y1023HS ELCAP 105℃...
- Page 54 22" LCD Color Monitor AOC 212Va D907 093G 60252 SP20150 D907 093G 60256 DIODE 0M1G1730 8120 SCREW 705GQCK0 61005 R908 ASS'Y R908 061G152M10458G 100K OHM 5% 2W 096G 29 6 H.S. TUBE 705GQCK0 61006 R914 ASS'Y R914 061G152M18858F 0.18OHM 2W 5% MOF 096G 29 6 H.S.
- Page 55 22" LCD Color Monitor AOC 212Va R804 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R803 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R835 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R839 061G0603120 3F RST CHIPR 120KOHM +-1% 1/10W R818 061G0603124...
- Page 56 22" LCD Color Monitor AOC 212Va F902 061G1206000 4 RST CHIPR 0 OHM +-5% 1/4W F903 061G1206000 4 RST CHIPR 0 OHM +-5% 1/4W F904 061G1206000 4 RST CHIPR 0 OHM +-5% 1/4W R815 061G1206100 RST CHIP 10R 1/4W 5%...
- Page 57 22" LCD Color Monitor AOC 212Va C839 065G0603104 32 CHIP 0.1UF 50V X7R C828 065G0603104 32 CHIP 0.1UF 50V X7R C817 065G0603104 32 CHIP 0.1UF 50V X7R C814 065G0603104 32 CHIP 0.1UF 50V X7R C813 065G0603105 12 CHIP 1UF 16VX7R 0603...
- Page 58 22" LCD Color Monitor AOC 212Va D812 093G 64 33 DIO SIG SM BAV99 (PHSE)R D810 093G 64 33 DIO SIG SM BAV99 (PHSE)R D803 093G 64 33 DIO SIG SM BAV99 (PHSE)R D909 093G 64 44 S LL4148WP D908...
- Page 59 Q07G 8 2 2 COMPOUND PALLET Q40G 22N61513A RATING LABEL Q40G000261568A VISTA LABEL Q40G000261573A POP LABEL FOR 212VA Q41G7800615A55 SA SERVICE CENTER FOR 712SA Q44G 10 1 BIG CARTON FOR IC Q44G 10 2 CORNER PAPER FOR CKD Q44GC012 1...
- Page 60 22" LCD Color Monitor AOC 212Va 095F 210 85 UL 1571 28A WG TS(0D=0.6MM) 095F 210 85 UL 1571 28A WG TS(0D=0.6MM) 095F 210 85 UL 1571 28A WG TS(0D=0.6MM) 095F 210 86 UL 1571 28A WG TS(0D=0.6MM) 095F 210 86 UL 1571 28A WG TS(0D=0.6MM)