7” LCD Color Monitor Wipro WLA171t Service Service Service Horizontal Frequency 30kHz – 80kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents.......……..……..........................…........1 6.Schematic……………....................................…18 Revision List.….............……..........................……......2 6.1 Main Board.……...……..........................................18 Important Safety Notice.…………....................……......3 6.2 Power Board..………..……..............
17” LCD Color Monitor Wipro WLA171t Revision List Revision Date Revision History TPV Model A00 Mar.
17” LCD Color Monitor Important Safety Notice Wipro WLA171t 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.
17” LCD Color Monitor 1. Monitor Specifications LCD Panel Input Wipro WLA171t Driving system TFT Color LCD Size 43.2cm(17.0") Pixel pitch 0.264mm( H ) × 0.264mm( V ) Viewable angle 160° (H) 160° (V) Response time 5 ms Video R,G,B Analog Interface Separate Sync. H/V TTL H-Frequency 30kHz – 80kHz V-Frequency 50-75Hz Display Colors 16.2M Colors Dot Clock 135MHz Max.
17” LCD Color Monitor 2. LCD Monitor Description Wipro WLA171t 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 CCFL Drive.
17” LCD Color Monitor 3. Operating Instructions Wipro WLA171t 3.1 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 (See Figure 3). By changing these settings, the picture can be adjusted to your personal preferences. • The power cord should be connected. • Connect the video cable from the monitor to the video card. • Press the power button to turn on the monitor position. The power indicator will light up. 3.
17” LCD Color Monitor Wipro WLA171t Front Panel Control • Power Button: Press this button to turn the monitor ON or OFF. • Power Indicator: Green — Orange — Power On mode. Off mode. • MENU / ENTER: Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Brightness /Contrast Adjust OSD status. • Volume: Increase volume or adjust function. • Volume: Decrease volume or adjust function. • Auto Adjust button / Exit: 1.
17” LCD Color Monitor Wipro WLA171t 3.3 Adjusting The Picture Press the MENU-button to activate the OSD window. 1. 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. Once the desired function is highlighted, press MENU-button to activate it. 2. Press < or > to change the settings of the selected function. 3.
17” LCD Color Monitor Wipro WLA171t Adjusting The Picture The descriptions for function control LEDS Main Menu Item Main Menu Icon Sub Menu Item Sub Menu Icon Description Contrast Contrast from Digital-register. Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal-Line noise Clock Adjust picture Clock to reduce Vertical-Line noise. H. Position Adjust the horizontal position of the picture. V. Position Adjust the vertical position of the picture.
17” LCD Color Monitor Main Main Menu Menu Item Icon OSD Setup Language Informatio n Sub Menu Item Wipro WLA171t Sub Menu Icon Description H. Position Adjust the horizontal position of the OSD. V. Position Adjust the vertical position of the OSD. OSD Timeout Adjust the OSD timeout. Language N/A Select the language you like. Information N/A Yes N/A Clear each old status of Auto-configuration. No N/A Do not execute reset, return to main menu.
17” LCD Color Monitor 4. Input/Output Specification Wipro WLA171t 4.1 Input Signal Connector Pin No. Description Pin No. Description 1. Red Video 9. + 5V 2. Green Video 10. Detect Cable 3. Blue Video 11. RXD 4. TXD 12. DDC-Serial Data 5. Ground 13. H-Sync 6. Red Ground 14. V-Sync 7. Green Return 15. DDC-Serial Clock 8. Blue Return Analog Connector 1 5 6 10 11 15 4.
17” LCD Color Monitor Wipro WLA171t 4.3 Panel Specification CLAA170EA07P is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, driver ICs, control circuit and backlight. By applying 8 bit digital data, 1280×1024, 16.2M-color images are displayed on the 17.0” diagonal screen. Input power voltage is 5.0V for LCD driving. Inverter for backlight is not included in this module. 4.3.1 Display Characteristics 4.3.2 Optical Characteristics Ta=25℃,VCC=5.
17” LCD Color Monitor Wipro WLA171t 4.3.3.
17” LCD Color Monitor 5. Block Diagram Wipro WLA171t 5.
17” LCD Color Monitor Wipro WLA171t 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. 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.
17” LCD Color Monitor Wipro WLA171t 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal 20MHz (X601) Panel Interface (CN503) MCU Scalar IC TSU16AK W78E065A40PL (Include ADC, OSD) Crystal 14.
” LCD Color Monitor Wipro WLA171t 5.2.
17” LCD Color Monitor 6. Schematic Wipro WLA171t 6.1 Main Board B2 B1 TXD RXD DDC_CLK DDC_DAT ST_DET1 ST_DET2 RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC VCC2.5 VCC3.3 VAA1 VAA2 VAA3 VAA4 VCC2.5 VCC3.3 R+ RG+ GB+ BCLK+ CLK- R+ RG+ GB+ BCLK+ CLK- VAA1 VAA2 VAA3 VAA4 3.INPUT B3 ST_DET2 ST_DET1 DDC_CLK DDC_DAT RXD TXD VCPU VCC12V VCC5V CSZ SCL SDA HWRESET INT AD0 AD1 AD2 AD3 VCC5V VCC12V VCPU VCPU VCC12V VCC3.3 VCC2.
17” LCD Color Monitor Wipro WLA171t VCC5V+ VCC5V SOT-252 D202 VCC12V VCC12V R202 6 CN201 R201 4.7K VI 1/16W C210 D201 SS14 VCC5V+ VCC5V VCC5V C201 0.1uF 3,4,6 R212 4.7K 1 Q201 PMBS3904 1/16W VO GND ON_OFF DIM VCC12V GND VCC5V GND VCC2.5 RT9164 0.1uF 2 VCC2.5 C211 4 C212 + 47uF/16V 0.1uF 1 2 4 6 8 10 12 3 1 3 5 7 9 11 U201 3 1/16W onBACKLITE 6 2 GND GND VCC12V GND VCC5V GND 10K GS1D C VCPU FB201 600 OHM CONN VCPU B 6 E VCC5V C202 R203 1K 1/16W C204 C203 + 0.
17” LCD Color Monitor Wipro WLA171t 1/16W R301 100 1/16W C304 0.047uF 0 1/16W R302 100 1/16W C305 0.047uF FB303 0 1/16W R303 100 1/16W C306 0.047uF R304 470 1/16W C307 0.001uF R305 100 1/16W C308 0.047uF R306 100 1/16W C309 0.047uF R307 100 1/16W C310 0.047uF PC5V R325 C301 1/16W NC 75 VGA_CON C302 NC C303 D303 BAV99 VSI R312 D319 TZMC5V6-GS08 100 4 GNDR 4 GNDG 4 GNDB 4 1/16W R309 100 R310 1K 1/16W 1/16W R311 1K 1/16W R313 2.
17” LCD Color Monitor Wipro WLA171t VCC3.3 FB401 3 3 3 3 3 3 3 3 VDVI 40 41 43 44 46 47 49 50 52 R+ RG+ GB+ BCLK+ CLKR403 390 1/16W C401 0.1uF 66 67 RIN0 RIN0M GIN0 GIN0M SOGIN0 BIN0 BIN0M HSYNC0 VSYNC0 DDC1_CLK/GPO8 DDC1_DAT/GPO7 VCC3.3 VPO VCC2.5 FB402 2 600 OHM C405 10uF/16V VDD VCC2.5 VDD 600 OHM C414 10uF/16V + + C406C407C408C409C410C411C412C413 0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF C415C416C417C418 0.1uF0.1uF0.1uF0.
17” LCD Color Monitor 4 4 PA[0..9] PB[0..9] PA[0..9] PB[0..
17” LCD Color Monitor Wipro WLA171t VCPU R601 1/16W RN601 C601 10K 0.1uF 1/16W 10K RN602 1/16W 10K 1/16W RST C604 22pF 2 D601 0.22uF 1 2 3 4 R604 10K R605 10K U602 A0 A1 A2 GND VCC WP SCL SDA 8 7 6 5 R639 AT24C16N-10SC-2.7 R638 NC INT CN601 R627 R626 VCC12V 2 VCC5V 2,3,4 10K 10K OUT-R+ OUT-R0.1uF 0.1uF 100 100 33 32 2 3 4 5 6 7 8 9 1/16W 1/16W 1/16W P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 XTAL1 XTAL2 RESET P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 P4.3 INT0/P3.
17” LCD Color Monitor Wipro WLA171t 6.2 Power Board + BD901 2KBP06M t T901 1 O 3 R906 1M 1/4W 2 + C905 100uF/400V R907 1M 1/4W C904 0.47uF/250V R901 1M 1/16W IC901 LDS7552 R916 100K CN902 1 SW_ON/OFF 2 GND 4 SG6841 8 D906 6O C924 470uF/16V ZD904 SML4737A/1 5 6 1/10W R915 10K 1/16W ZD905 RLZ20B R914 NC FB901 C912 330pF + 10,11 C925 1000uF/16V R912 1K 1/4W C913 0.0047uF/250V R918 20K 1/4W + C926 470uF/16V FB902 BEAD CONN C927 0.
17” LCD Color Monitor Wipro WLA171t TP1 HVO TP3 HVL TP4 HVL 1 1 1 CN201 C215 22pF/6KV Q203 R214 2.2K 1/16W DTA144WKA R243 1K 1/4W Q201 NO/OFF R202 10K R218 100 DIM R208 4.7K 1/16W R205 47K R216 220 1/16W MPS3904 1 R224 1.5K R220 15K C211 1uF/25V R222 12K Q207 R238 12K C219 1uF/25V R236 620 1 TP5 HVL 1 TP6 HVL TP2 HVO 9 0.1uF R244 1K 1/4W MPS3904 D202 SR24 D204 RLZ11B R228 1.5K R229 1.5K R230 1.5K R231 1.5K R221 15K C212 C214 0.
17” LCD Color Monitor Wipro WLA171t 6.3 Audio Board OUT_LOUT_R PIN-3 CN202 WAFER 2*7P 2.54mm MUTE 9 R212 33L8022-3A-H FEMALE 6 11 220K 12 GND R210 R211 C212 100 pF + C209 + C210 1.0uF 1.0uF C213 0.1uF 15 GND GND INL OUTL INR OUTR VOLUME SVR STBY VAROUT_R MUTE VAROUT_L GND 26 CN203 + VS C205 17 4 3 2 1 470uF/16V 14 10 C207 470uF/16V 7 5 C208 470uF/16V + 1 2 3 13 18 19 20 5.6K 100 pF 5.6K C211 GND + C206 0.47uF R203 10K U201 TDA7496L C203 0.
17” LCD Color Monitor 7. PCB Layout Wipro WLA171t 7.
17” LCD Color Monitor Wipro WLA171t 28
17” LCD Color Monitor Wipro WLA171t 7.
17” LCD Color Monitor Wipro WLA171t 30
17” LCD Color Monitor Wipro WLA171t 7.3 Audio Board 7.
17” LCD Color Monitor 8. Maintainability Wipro WLA171t 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.
17” LCD Color Monitor Wipro WLA171t 8.2 Trouble Shooting 8.2.1 Main Board No Power 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 OK Reinsert or check the Adapter/Inverter section Measure U201 PIN2=2.5V U202 PIN2=3.
17” LCD Color Monitor Wipro WLA171t No Picture (LED orange) No picture NG The button if under X601 oscillate control NG Replace X601 waveform is normal OK OK Check reset circuit of U601 is normal Measure U201 PIN2=2.5V U202 PIN2=3.
17” LCD Color Monitor Wipro WLA171t White Screen White screen Measure Q204 base NG is high level? NG OK OK Check Correspondent component. X601 oscillate waveform is normal Check Q203, Q204 are Check reset circuit of broken or CN503 solder? U601 is normal NG NG OK OK Replace U601 Replace PANEL 35 Replace X601 Check Correspondent component.
17” LCD Color Monitor Wipro WLA171t 8.2.
17” LCD Color Monitor Wipro WLA171t W / LED, No Backlight Check CN102 pin12 =12V NG Check adapter or MB OK Check ON/OFF signal NG Check Interface board OK Check U201 pin9=12V NG Change Q201 or Q202 OK Check the pin1 of U201 have saw tooth wave NG Change U201 OK Check D201 (-),D202 (-) have the output of square wave at short time.
17” LCD Color Monitor Wipro WLA171t 8.2.
17” LCD Color Monitor 9. White-Balance, Luminance Adjustment Wipro WLA171t 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 (7800 color): 7800 color temp.
17” LCD Color Monitor 10.
17” LCD Color Monitor Wipro WLA171t NO. DESCRIPTION PART NO. NO. DESCRIPTION PART NO.
17” LCD Color Monitor 11. BOM List Wipro WLA171t T76CM4HCALWNE Location E089B Part No.
17” LCD Color Monitor Wipro WLA171t 033G4694 1 C POWER LENS 033G4695 1 C CLAMP 034G1273 72 B STAND M037 037G 489 1 HINGE ASS'Y E078L 078G 322501 L SPEAKER E078R 078G 322501 R SPEAKER 0Q1G 330 8120 SCREW 3X8mm 0Q1G1030 8128 CR3 SCREW 0Q1G1030 10128 CR3 SCREW Q34G1271 72A1B BEZEL 750GLB70A7P21V PANEL CLAA170EA07P 010 V CPT AM1G1740 10 47 CR3 SCREW M3X6 AUPC780A9P AUDIO BOARD 033G802414C H 2*7PIN DUAL ROW RIGHT ANGLE H 056G 616 1 IC E-TDA7496L ST 090G6059 1 HEAT SINK 095G80
17” LCD Color Monitor Wipro WLA171t C204 067G215B221 4H LOW E.S.R 220UF +-20% 25V C202 067G215B221 4H LOW E.S.R 220UF +-20% 25V CN301 088G 35315F H D-SUB 15PIN X401 093G 22 53 J 14.31818MHZ/32PF/49US X601 093G 22 55 J 20MHz/20PF/49US U401 056G 562 86 TSU16AK PQFP-128 BY MST U202 056G 563 7 IC AIC1084-33PMTR-R AIC U201 056G 563 31 AI1117D-1.
17” LCD Color Monitor Wipro WLA171t R302 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R301 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R310 061G0603102 RST CHIP 1K 1/10W 5% R203 061G0603102 RST CHIP 1K 1/10W 5% R311 061G0603102 RST CHIP 1K 1/10W 5% R624 061G0603102 RST CHIP 1K 1/10W 5% R603 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R602 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R601 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R407 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R406 061G060310
17” LCD Color Monitor Wipro WLA171t R623 061G0603471 RST CHIPR 470 OHM +-5% 1/10W R304 061G0603471 RST CHIPR 470 OHM +-5% 1/10W R201 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R205 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R207 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R212 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R616 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R619 061G0603472 RST CHIPR 4.
17” LCD Color Monitor Wipro WLA171t C613 065G0603104 32 CHIP 0.1UF 50V X7R C612 065G0603104 32 CHIP 0.1UF 50V X7R C201 065G0603104 32 CHIP 0.1UF 50V X7R C203 065G0603104 32 CHIP 0.1UF 50V X7R C205 065G0603104 32 CHIP 0.1UF 50V X7R C210 065G0603104 32 CHIP 0.1UF 50V X7R C404 065G0603104 32 CHIP 0.1UF 50V X7R C401 065G0603104 32 CHIP 0.1UF 50V X7R C313 065G0603104 32 CHIP 0.1UF 50V X7R C217 065G0603104 32 CHIP 0.1UF 50V X7R C216 065G0603104 32 CHIP 0.
17” LCD Color Monitor Wipro WLA171t D601 093G 39147 TZMC5V6 D323 093G 39147 TZMC5V6 D322 093G 39147 TZMC5V6 D321 093G 39147 TZMC5V6 D320 093G 39147 TZMC5V6 D319 093G 39147 TZMC5V6 D318 093G 39147 TZMC5V6 D317 093G 39147 TZMC5V6 D304 093G 64 42 P BAV70 SOT-23 D303 093G 6433P BAV99 D302 093G 6433P BAV99 D301 093G 6433P BAV99 D201 093G1004 3 SS14 D202 093G1020 1 S GS1D 715G1237 2 3 MAIN BOARD PCB KEPC780KMNP [KEY BOARD CN103 033G3802 2H WAFER 2P RIGHT ANGLE CN
17” LCD Color Monitor Wipro WLA171t Q210 057G 761 6 2SC5706-P-E Q209 057G 761 6 2SC5706-P-E R919 061G 2J398 59 0.39 OHM 2W NR901 061G 58080 WT 8 OHM NCT R903 061G152M104 64 100KOHM 5% 2W C904 063G107K474 HS X2 CAP 0.47UF K 275VAC C214 063G210J2242AC FILM CAP 0.22UF J 250V C213 063G210J2242AC FILM CAP 0.
17” LCD Color Monitor Wipro WLA171t U201 056G 622 1 BA9741F-SMT Q205 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q206 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q207 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q208 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q202 057G 760 4B PDTA144WK SOT346 Q201 057G 760 5B PDTC144WK SOT346 Q203 057G 763 3B AM9435P.T1-PF SO-8 Q204 057G 763 3B AM9435P.
17” LCD Color Monitor Wipro WLA171t R905 061G1206754 RST CHIPR 750 KOHM +-5% 1/4W R910 061G1206820 2F RST CHIPR 82 KOHM +-1% 1/4W C927 065G0805104 32 CHIP 0.
17” LCD Color Monitor Wipro WLA171t R203 061G 60210352T CFR 10KOHM +-5% 1/6W R223 061G 60212352T 12KOHM 5% 1/6W R222 061G 60212352T 12KOHM 5% 1/6W R238 061G 60212352T 12KOHM 5% 1/6W R239 061G 60212352T 12KOHM 5% 1/6W R210 061G 60215352T 15KOHM 5% 1/6W R211 061G 60215352T 15KOHM 5% 1/6W R220 061G 60215352T 15KOHM 5% 1/6W R221 061G 60215352T 15KOHM 5% 1/6W R215 061G 60222252T 2.2K 5% 1/6W R214 061G 60222252T 2.
17” LCD Color Monitor Wipro WLA171t FB901 071G 55 29 FERRITE BEAD F901 084G 56 1 FUSE 2A 250V WICKMANN ZD902 093G 39 5452T HZ12B2-E ZD903 093G 39 7752T HZ5C1-E D901 093G 6026T52T RECTIFIER DIODE FR107 D902 093G 6038P52T PS102R D210 093G 64 1152T 1N4148 D209 093G 64 1152T 1N4148 D208 093G 64 1152T 1N4148 D207 093G 64 1152T 1N4148 D206 093G 64 1152T 1N4148 D205 093G 64 1152T 1N4148 715G1103 3 17 POWER BOARD PCB Q40G 17N856 3A RATING LABEL Q44G3739856 2B CARTON Q45G