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19" LCD 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 Control Buttons......................................................6
3.2 Attaching the Cables...............................................7
3.3 Adjusting the Picture..................................................8
4.Input/Output Specification........................................10
4.1 Input Signal Connector...........................................10
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4.2 Factory Preset Display Modes.................................11
4.3 Panel Specification...............................................12
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.............................................................18
6.1 Main Board..........................................................18
6.2 Power Board......................................................23
6.3 Key Board.........................................................26
7.PCB Layout..........................................................27
7.1 Main Board.........................................................27
7.2 Power Board.......................................................30
7.3 Key Board...........................................................33
8. Maintainability........................................................34
8.1 Equipments and Tools Requirement....................34
8.2 Trouble Shooting................................................34
9.White-Balminance Adjustment................................40
10.Monitor Exploded View.....................................42
11.BOM List..............................................................43
SAFETY NOTICE
1
Wipro WA19W
Horizontal Frequency
30kHz - 83kHz
Page
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Summary of Contents for AOC Wipro WA19W
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Page 1: Table Of Contents
19″ LCD Monitor Wipro WA19W Service Service Service Horizontal Frequency 30kHz – 83kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……..……......…..1 5.2 Electrical Block Diagram….…...………..…..…...17 Revision List.….....……......………..2 6.Schematic……………...........…18 Important Safety Notice.…………....………..3 6.1 Main Board.……...……..........18 1.Monitor Specification.......…………..4 6.2 Power Board..………..……........23 2.LCD Monitor Description……………………………..5... -
Page 2: Revision List
19″ LCD Monitor Wipro WA19W Revision List Revision Date Revision History TPV Model April-16-2009 Initial Release T9RSM6NCX2PUDN... -
Page 3: Important Safety Notice
Wipro WA19W 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
19″ LCD Monitor Wipro WA19W 1. Monitor Specifications Driving system 19" TFT Color LCD LCD Panel Viewable Image Size 481mm diagonal Pixel pitch 0.2835mm( H ) × 0.2835mm( V ) Video R,G,B Analog Interface Separate Sync. H/V TTL Input H-Frequency 30kHz –... -
Page 5: Lcd Monitor Description
19″ LCD Monitor Wipro WA19W 2. LCD Monitor Description The LCD monitor will contain a main board, a power board and a key 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: Operation Instruction
19″ LCD Monitor Wipro WA19W 3. Operating Instructions General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. -
Page 7: Attaching The Cables
19″ LCD Monitor Wipro WA19W power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off and then press power button to turn the monitor on. 3.2 Attaching the Cables... -
Page 8: Adjusting The Picture
19″ LCD Monitor Wipro WA19W 3.3 Adjusting the Picture 1. Press the MENU-button to activate the OSD window. 2. Press - or + to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate it. If the function selected has a sub-menu, press - or + again to navigate through the sub-menu functions. - Page 9 19″ LCD Monitor Wipro WA19W Main Main Menu Sub Menu Menu Description Item Item Menu Icon Warm Recall Warm Color Temperature from EEPROM. Normal Recall Normal Color Temperature from EEPROM. Cool Recall Cool Color Temperature from EEPROM. sRGB Recall SRGB Color Temperature from EEPROM.
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Page 10: Input/Output Specification
19″ LCD Monitor Wipro WA19W 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description Green Ground Blue Ground Ground DDC-Serial Data Detect Cable H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground 15 - Pin Color Display Signal Cable Pin No. -
Page 11: Factory Preset Display Modes
19″ LCD Monitor Wipro WA19W 4.2 Factory Preset Display Modes Standard Resolution Horizontal Frequency Vertical Frequency Dos-mode 720 × 400 31.47kHz 70.0Hz 640 × 480 31.47kHz 60.0Hz 640 × 480 37.50kHz 75.0Hz 800 × 600 37.879kHz 60.0Hz SVGA 800 × 600 46.875kHz... -
Page 12: Panel Specification
19″ LCD Monitor Wipro WA19W 4.3 Panel Specification LTM190M2-L31 is a color active matrix liquid crystal display(LCD) that uses amorphous silicon TFT(Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. - Page 13 19″ LCD Monitor Wipro WA19W 4.3.2 Optical Characteristics...
- Page 14 19″ LCD Monitor Wipro WA19W 4.3.3 Electrical Characteristics TFT LCD Module Back Light Unit...
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Page 15: Block Diagram
19″ LCD Monitor Wipro WA19W 5. Block Diagram 5.1 Software Flow Chart... - Page 16 19″ LCD Monitor Wipro WA19W REMARK: 1) MCU initializes. 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
19″ LCD Monitor Wipro WA19W 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal Panel Interface 14.318MHZ (CN301) (X401) Flash Memory SST25VF020A Scalar TSUM5PFHL-LF (U402) Key Control Interface (Include MCU, ADC, OSD) (CN402) EEPROM (U401) M24C04 (U403) H sync V sync... -
Page 18: Schematic
19″ LCD Monitor Wipro WA19W 5.2.2 Power Board AC input Transformer Bridge Rectifier EMI filter Rectifier diodes and Filter (T901) Start Resistor (R904, R905, R906) PWM Control LD7552DPS Power Switch (Q901) (IC901) Photocoupler Regulator (IC903) (IC904) Transformer Output MOSFET (PT801) - Page 19 19″ LCD Monitor Wipro WA19W 6. Schematic 6.1 Main Board 715G2883 1 6 FB102 VGA_B+ MVCC_1 R105 100R 1/16W 5% C102 DSUB_B+ BEAD 0.047uF H_Sy nc R102 0R05 1/10W 5% R103 1K 1/16W 5% R108 C105 DSUB_H V_Sy nc R104 1K 1/16W 5%...
- Page 20 19″ LCD Monitor Wipro WA19W CN301 PA[0..9] PB[0..9] PA[0..9] PB[0..9] LVB3P CN302 LVB0M RXO0- PA0 LVA3P LVB3M LVB0P RXO0+ PA1 LVA3M LVBCKP LVB1M RXO1- PA2 LVACKP LVBCKM LVB0M RXO0- RXO0+ LVB0P LVB1P RXO1+ PA3 LVACKM LVB2P LVB1M RXO1- RXO1+ LVB1P...
- Page 21 19″ LCD Monitor Wipro WA19W CMVCC1 VCC1.8 C710 0.1uF 16V FB702 300 OHM CN701 VCC3.3 C705 C704 100UF25V SM340A D701 MVCC 0.1uF/16V CMVCC Q702 CMVCC KN2907AS R705 BKLT-VBRI R709 BKLT-EN R710 NC 10K 1/16W 5% PANEL_ID# PANEL_ID# 2 Volume# Q703...
- Page 22 R443 EE_WP CN402 3.9K OHM 1% 1/16W 3.9K OHM 1% 1/16W CN403 MSCL U402 MSDA KEY 2 KEY 1 M24C04-WMN6TP 010A Befor AOC ID2007 OSD POWER_KEY # LED_GRN/BLUE LED_ORANGE 020A For ID2008 LF_B C431 C432 C433 C434 R411 C435 R408...
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Page 23: Power Board
19″ LCD Monitor Wipro WA19W 6.2 Power Board 715G2824 2 L904 100 OHM 1/4W R918 FB904 +16V 100 OHM 1/4W R919 C912 BEAD BD901B 0.001uF R946 ZD902 GBU408 100 OHM 1/4W R920 150OHM2W RLZ18B C918 C917 680uF25V 680uF25V FB902 80OHM... - Page 24 19″ LCD Monitor Wipro WA19W +16V R805 100R 1/10W 5% ON/OFF D801 LL4148 Q805 CN801 PT801 POWER X'FMR C819 R806 100R 1/8W 68pF/3KV ZD802 C816 RLZ5.6B 22pF/6KV ZD803 D802 LL4148 CN802 RLZ5.6B R803 R804 5K1 1/8W AM4502C-T1-PF C824 C820 22pF/6KV...
- Page 25 19″ LCD Monitor Wipro WA19W +5V1 +5V1 R602 10K 1/10W 5% C604 100uF/25V R603 10K 1/10W 5% C609 1uF/25V 10K 1/10W 5% R609 IC601 CONN LOUT- SE/BTL LOUT- CN601 VOLUME LOUT+ C601 0.47uF/16V LIN- LOUT+ ROUT+ R604 10K 1/10W 5% C606 0.47uF/16V...
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Page 26: Key Board
19″ LCD Monitor Wipro WA19W 6.3 Key Board 715G2835 2 LED_Y ELLOW# LED_GRN# D001 CN001 LBADC1 R002 2.0 KOHM +-1% 1/4W LBADC2 DC_POWERON R003 0 OHM +-1% 1/10W LED_GRN# LED_Y ELLOW# C001 C002 C003 C004 C005 R004 2.0 KOHM +-1% 1/4W... -
Page 27: Pcb Layout
19″ LCD Monitor Wipro WA19W 7. PCB Layout 7.1 Main Board 715G2883 1 6... - Page 28 19″ LCD Monitor Wipro WA19W...
- Page 29 19″ LCD Monitor Wipro WA19W...
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Page 30: Power Board
19″ LCD Monitor Wipro WA19W 7.2 Power Board 715G2824 2... - Page 31 19″ LCD Monitor Wipro WA19W...
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Page 33: Key Board
19″ LCD Monitor Wipro WA19W 7.3 Key Board 715G2835 2... -
Page 34: Maintainability
19″ LCD Monitor Wipro WA19W 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. 8.2 Trouble Shooting 8.2.1 Main Board No power... - Page 35 19″ LCD Monitor Wipro WA19W No picture (LED orange) No picture X401 oscillate Replace X401 The button if under control waveform is normal Check reset circuit of Check Correspondent U401 is normal component Measure U701 Pin2=3.3V, C704(+)=1.8V Replace U401 Check CN701,U701,Q702,Q703...
- Page 36 19″ LCD Monitor Wipro WA19W White screen X401 oscillate Measure Q302 base is low level? waveform is normal Replace X401 Check CN301 is solder and Q301,Q302 are OK? Check reset circuit of U401 is normal Check Correspondent Check Correspondent component.
- Page 37 19″ LCD Monitor Wipro WA19W 8.2.2 Power/Inverter Board No power Check AC line volt 100V~240V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R904, R905, R906, Change IC901...
- Page 38 19″ LCD Monitor Wipro WA19W No Backlight Check C812(+)=16V Check adapter Check ON/OFF signal Check Interface board or main board Check IC801 PIN2=16V Change on/off circuit Check IC801 PIN13 have triangle wave Check IC801 Check IC801 PIN1/PIN15 PWM wave Check IC801...
- Page 39 19″ LCD Monitor Wipro WA19W 8.2.3 Key Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Is Key Pad Board normally? Replace Key Pad Board...
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Page 40: White-Balminance Adjustment
19″ LCD Monitor Wipro WA19W 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,y,Y value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust 2. - Page 41 19″ LCD Monitor Wipro WA19W B. Adjust (7300K) color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM .channel to Channel 4 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 302 ±30, y = 318 ±30, Y>180cd/m 4.
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Page 42: Monitor Exploded View
19″ LCD Monitor Wipro WA19W 10. Monitor Exploded View Description B E Z E L LE N S K E Y P A D K E Y B O A R D P A N E L P O W E R B O A R D... -
Page 43: Bom List
19″ LCD Monitor Wipro WA19W 11.BOM List T9RSM6NCX2PUDN Location Part No. Description Remark 050G 600 2 HANDLE1 050G 600 3 HANDLE2 052G 1185 1 BIG TAPE 052G 1186 SMALL TAPE 052G 1207 A CONDUCTIVE TAPE 45MM *25MM *0.08MM 052G 1211 B CONDUCTIVE TAPE 85MM *40MM *0.09MM... - Page 44 19″ LCD Monitor Wipro WA19W CN102 088G 35424F D DVI 24PIN CONN F ATTACHED SCREW CN102 088G 35424F N DVI 24PIN CONN F ATTACHED SCREW 2nd source X401 093G 22 53 J 14.31818MHZ/32PF/49US 709G2883 QM001 CONSUMPTIVE ASS'Y 055G ALCOHOL 055G 23524...
- Page 45 19″ LCD Monitor Wipro WA19W R120 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R133 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R135 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R303 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R408 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W...
- Page 46 19″ LCD Monitor Wipro WA19W C435 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C434 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C433 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C432 065G0402104 15 MLCC 0402 0.1UF K 16V X5R...
- Page 47 19″ LCD Monitor Wipro WA19W FB406 071G 59G301 CHIP BEAD 300OHM FB704 071G 59G301 CHIP BEAD 300OHM R424 061G0402101 RST CHIPR 100 OHM +-5% 1/16W C438 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R R430 061G0402000 RST CHIP MAX 0R05 1/16W...
- Page 48 19″ LCD Monitor Wipro WA19W C939 067G215P1024PV CAP 105℃ 1000UF M 25V C915 067G215P4713PV CAP 105C 470UF M 16V C934 067G215S1023KV EC CAP 105℃ 1000UF M 16V C916 067G215S1023KV EC CAP 105℃ 1000UF M 16V C939 067G215S1024KV EC 105℃ CAP 1000UF M 25V...
- Page 49 19″ LCD Monitor Wipro WA19W Q805 057G 763905 FET FDS8958A SO-8 Q806 057G 763905 FET FDS8958A SO-8 R846 061G0603000 RST CHIP MAX 0R05 1/10W R849 061G0603000 RST CHIP MAX 0R05 1/10W R926 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W...
- Page 50 19″ LCD Monitor Wipro WA19W RJ805 061G1206000 RST CHIP MAX 0R05 1/4W RJ804 061G1206000 RST CHIP MAX 0R05 1/4W RJ802 061G1206000 RST CHIP MAX 0R05 1/4W RJ801 061G1206000 RST CHIP MAX 0R05 1/4W J802 061G1206000 RST CHIP MAX 0R05 1/4W...
- Page 51 19″ LCD Monitor Wipro WA19W C935 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R D809 093G 64 33 DIO SIG SM BAV99 (PHSE)R D806 093G 64 42 P BAV70 SOT23 BY PAN JIT D807 093G 64 42 P BAV70 SOT23 BY PAN JIT...
- Page 52 19″ LCD Monitor Wipro WA19W J910 095G 90 23 JUMPER WIRE J909 095G 90 23 JUMPER WIRE J908 095G 90 23 JUMPER WIRE J907 095G 90 23 JUMPER WIRE J906 095G 90 23 JUMPER WIRE J905 095G 90 23 JUMPER WIRE...