Sharp LL-T2020 Page 22 Service Manual Download | Manualshive

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CHAPTER 7. CIRCUIT DIAGRAM

POWER SUPPLY PWB

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Summary of Contents for LL-T2020

Page 1: ...s been published to be used for after sales service only The contents are subject to change without notice LLT2020SME LCD MONITOR MODEL LL T2020 CHAPTER 1 OUTLINE OF THE PRODUCT NOMENCLATURE AND FUNCTION 1 1 CHAPTER 2 CONNECTION ADJUSTMENT OPERATION AND FUNCTIONS 2 1 CHAPTER 3 DISASSEMBLY AND ASSEMBLY 3 1 CHAPTER 4 TROUBLESHOOTING 4 1 CHAPTER 5 WAVE FORM 5 1 CHAPTER 6 BLOCK DIAGRAM 6 1 CHAPTER 7 C...

Page 2: ...patible Power management VESA based on DPMS DVI based on DMPM Input signal terminal 29 pin DVI I x 2 USB hub function 1 upstream port 2 downstream ports selfpowered hub based on USB standard Rev 1 1 Height adjustment Adjustment range Approx 60 mm Screen rotation Clockwise 0 90 Screen tilt Upward approx 0 30 downward approx 0 5 Screen swivel Approx 90 from left through right Power supply AC100 240V...

Page 3: ...5 0MHz 60 0kHz 75Hz 78 75MHz 1152 x 864 67 5kHz 75Hz 108 0MHz 1280 x 960 60 0kHz 60Hz 108 0MHz 1280 x 1024 64 0kHz 60Hz 108 0MHz 80 0kHz 75Hz 135 0MHz 1600 x 1200 75 0kHz 60Hz 162 0MHz US text 720 x 400 31 5kHz 70Hz 28 3MHz Power Macintosh series 640 x 480 35 0kHz 66 7Hz 30 2MHz 832 x 624 49 7kHz 74 6Hz 57 3MHz 1024 x 768 60 2kHz 75Hz 80 0MHz 1152 x 870 68 7kHz 75Hz 100 0MHz 1280 x 1024 64 0kHz 60...

Page 4: ... MENU button This button is used to pop up select and close the OSD On Scree Display Menu 3 c button This button is used to select menu options when the OSD Menu is displayed 4 e d buttons When the OSD Menu is displayed These buttons are used to increase or decrease the value of a selected option When the OSD Menu is not displayed These buttons are used to adjust back light brightness 5 Power butt...

Page 5: ...or width to suit the dis played content Before rotating move the display to its uppermost position If the dis play is rotated while it is set low it will contact the stand and could lead to damage The display can only be rotated through a range of 90 Applying excessive force may cause malfunction Do not apply excessive force when the cable is connected To set to long height Gently turn in the cloc...

Page 6: ...rapped Caution If the display is to be rotated first house the cable and then check while gently turning the display If it cannot be turned rehouse the cable with sufficient slack If there is insufficient cable length rotation will be impossible Forcing rotation may cause cable disconnection 1 1 Connecting the monitor to a computer The accessory signal cable enables connection of two computers One...

Page 7: ...to select INPUT1 or INPUT2 and use the e d buttons to select ON and OFF Do not set to ON if you are not using a Belkin ADC DVI adapter as this may result in incorrect display 4 Press the power button and turn off the monitor power This completes setting When connecting using a separately sold 2 input cable The separately sold 2 input cable NL C03J enables connection between the DVI I input termina...

Page 8: ...ntil the screen is displayed If the input terminal to which the computer is connected has not been selected the screen will not be displayed If necessary per form input terminal switching right column Notes when using an analog signal If using the monitor for the first time or after having changed the system settings during use perform an automatic screen adjust ment When connecting to a notebook ...

Page 9: ...ded with the arm or stand 1 Remove the cable 2 Spread out a soft cloth on a suitable horizontal surface 3 Being careful not to damage the monitor gently lay the monitor on it display side down 4 Remove the four screws and then remove the stand from the moni tor Note The stand is specially made for use with this monitor Once having removed the stand never attempt to attach it to another device Once...

Page 10: ...When the message indicating installation is finished is displayed click Next 13 Click on Finish 14 Click on Yes and restart the computer For Macintosh 1 Quit all applications being used 2 Load the accessory CD ROM into the CD ROM drive of the com puter 3 Open the CD ROM 4 Double click on the Pivot folder 5 Select the desired language 6 Double click on Install MacPortrait 7 Drag the MacPortrait Ins...

Page 11: ... the power 6 Aging While pressing turn on the power simultaneously Press While pressing While pressing While pressing turn on the power Adjust with and While pressing turn on the power Analog only Analog only Analog only Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adjust with and Adj...

Page 12: ...dard WARM Color tone redder than standard USER R CONTRAST e button for blue green d button for red G CONTRAST e button for purple d button for green B CONTRAST e button for yellow d button for blue GAMMA 10 10 Adjust so that dark and bright images are easy to see If the screen is dark and hard to see increase the numerical value If it is bright and hard to see lower the numerical value e d buttons...

Page 13: ... aand screw D Remove the USB board 5 4 Remove the connectors b c d e and screws E F Remove the main board 6 5 Remove the screw Gand then remove the PS switch cover 7 6 Remove the connector fand screw H Remove the power supply board 8 7 Remove the screw Iand then remove the shield plate 9 8 Remove the screw Jand then remove the connector locking seat F 9 Remove the connectors g h i and screw K Remo...

Page 14: ...en remove the base arm cover 5 5 Remove the screw Dand then remove the base arm install angle 6 6 Remove the screw Eand then remove the slide guide 7 7 Remove the base arm angle 8 8 Remove the screw Fand then remove the slide arm cover 9 9 Remove the screw Gand then remove the slide arm cover F 10 Remove the screw Hand then remove the slide arm angle G 11 Remove the screw Iand then remove the hing...

Page 15: ...Yes No No No No Yes Yes No No No No No Yes No Yes Yes No No No Perform 1 B L is lit No error Check AC cable connection Check power supply unit switch Check circuits around IC601 Check circuits around IC801 Check circuits around IC401 Check RESET circuit around IC602 Check IC602 and clock circuit around X601 Check SW101 and circuits around IC101 The power supply unit is switched on SW101 is on 1st ...

Page 16: ...d check the LD801 is DC 12V Check inverter unit inverter cable and their connections Check the power unit and cable and their connections and DC 12V power supply line Check BL_EN signal and circuits around CN802 Check BRT_VR signal and circuits around IC604 Signal waveforms of test terminals LD304 LD305 LD317 LD318 are normal Signal waveforms of test terminals LD312 LD323 LD313 LD324 are normal Si...

Page 17: ... and LCD module Check DC 5V power supply line DV5A POWER_CTL1 signal and circuits around Q807 Test terminals LD405 LD523 and LD701 are DC 3 3V Signal waveform of test terminal LD565 is normal Test terminals LD401 LD402 and LD403 are DC 3 3V Test terminal LD815 is DC 5V Test terminal LD806 is DC 5V Test terminal LD801 is DC 12V Test terminal LD501 is DC 2 5V LD816 is DC 12 0V 36th pin of LC602 is i...

Page 18: ... adjusted AUTO function of GAIN CONTROL operates properly Input signal port is the one to which digital signal cable is connected Waveforms of IC103s and 201s 1st and 2nd pins change normally when resolution is changed Test terminals LD110 LD111 LD112 LD113 LD210 LD211 LD212 LD213 are DC 3 3V CN101 and 201 signals at 1st 2nd 9th 10th 17th 18th 23rd and 24th pins are normal IC102 and IC202 signal o...

Page 19: ...rbitrary 1V DIV 5ms DIV WAVE FORM 4 HSYNC LD304 LD317 Frequency 75kHz Display screen Arbitrary 1V DIV 5µ µ µ µs DIV Wave form No Measurement point Name of waveform Display pattern 1 LD565 REFCK Arbitrary 2 IC601 of 2PIN XTAL Arbitrary 3 LD305 LD318 VSYNC Arbitrary 4 LD304 LD317 HSYNC Arbitrary 5 LD502 ICK Arbitrary 6 LD504 VS Arbitrary 7 LF505 IHS Arbitrary 8 IC701 of 10PIN DCLK Arbitrary 9 IC701 ...

Page 20: ... IHS LD505 Frequency 75kHz Display screen Arbitrary 1V DIV 5µ µ µ µs DIV WAVE FORM 8 DCLK IC701 of 10PIN Frequency 81MHz Display screen Arbitrary 1V DIV 5ns DIV WAVE FORM 9 DEN IC701 of 9PIN Frequency 75kHz Display screen Arbitrary 1V DIV 5µ µ µ µs DIV WAVE FORM 10 RGB OUT LD300 LD301 LD302 Display screen 16 monochromatic gradation patterns 0 5V DIV 5µ µ µ µs DIV GND GND GND GND GND GND ...

Page 21: ... 3 3V V33 PV5 POWER_CTL Logic IC504 VS CN701 CN601 CN802 CN801 SW101 I IHS IVS X501 10MHz PDO1 SDET1 PD1 IHS IVS ID 0 47 PDO2 SDET2 PD2 ID 0 47 IACT ID 0 47 IHS IVS ICK B ICK B COMSYN ICK B Clock Generator IC501 DEN DCLK OD 0 47 LCD Panel Lamp Lamp DV25 AV5 DV5 DV5A PV33 AV33 DV33 OV33 AD33 LV33 3 3V Regulator LM317 IC601 3 3V 12V BL_EN RX USB PWB IC3 uPD72012 X1 4MHz CN1 USB CN 4PIN CN2 USB CN 8P...

Page 22: ...3 2 1 1 2 3 4 5 6 7 8 D C B A A B C D 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 D C B A A B C D 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 D C B A A B C D 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 D C B A 1 9 CHAPTER 7 CIRCUIT DIAGRAM POWER SUPPLY PWB ...

Page 23: ...LM18PG600SN1 R107 47kJ RA105 33J x4 IC101 FST3257 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 S 1B1 1B2 1A 2B1 2B2 2A GND 3A 3B2 3B1 4A 4B2 4B1 OE VCC R109 0J R131 EMPTY R105 75J RA111 33J x4 C125 10uF LDS103 R130 0J R122 33J C105 0 1uF C106 0 1uF D102 UDZS5 6B RA104 33J x4 LD111 C116 10uF 3216 C121 EMPTY RA110 33J x4 R127 47kJ LDS102 C113 100pF IC102 THC63DV161 57 58 49 50 51 52 53 54 55 56 59 60 61 6...

Page 24: ...A 1 2 3 4 5 6 C215 0 1uF FB205 BLM18PG600SN1 R216 33J R211 4 7kJ LDS203 C202 0 1uF LD201 IC201 BU9882F 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SCL_PC0 SDA_PC0 NC SCL_PC1 SDA_PC1 NC GND SDA_MON SCL_MON DDCENA BANKSEL DUAL_PCB WPB VCC C201 0 1uF C217 0 1uF LD211 R218 47kJ C225 10uF R210 4 7kJ RA206 33J x4 C206 0 1uF R222 47kJ LDS204 R209 4 7kJ RA203 33J x4 FB201 BLM18PG600SN1 RA211 33J x4 C224 10uF RA209 3...

Page 25: ...346 270J R355 4 7kJ C321 10uF B R304 10kJ R310 180J C329 EMPTY R319 EMPTY LD311 R302 270J R356 4 7kJ R305 10J R322 330J R326 2 2kF LD314 R314 10kJ C307 0 047uF B IC302 SN74LVC14A 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1A 1Y 2A 2Y 3A 3Y GND VCC 6A 6Y 5A 5Y 4A 4Y LD316 D302 DAN217U 3 2 1 R324 EMPTY R335 10kJ R318 33J LD324 R342 EMPTY Q303 2SA1610 R311 EMPTY FB302 MMZ1608D30 1B C301 0 1uF Q305 EMPTY FMG8A ...

Page 26: ...5 DRA4 DRA3 DRA2 DRA1 DRA0 GND VDD DATACK DATACKB HSOUT SOGOUT VSOUT GND LD412 C425 0 1uF C408 0 1uF LD405 R410 33J C405 EMPTY 22uF 16V WT C438 0 1uF C443 0 1uF C423 0 1uF FB404 BLM18PG600SN1 C419 0 1uF LD409 C432 EMPTY 22uF 16V WT R413 10kJ C427 0 1uF LD410 C454 0 1uF LD415 LD419 C451 0 1uF LD421 C447 1000pF C411 10SVP33M LD402 C431 10uF R403 EMPTY LD411 C403 0 1uF C418 0 1uF LD403 C452 0 1uF R41...

Page 27: ...9 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 207 208 206 VDD CVDD GND OD0 OD1 OD2 GND OD3 OD4 VDD O...

Page 28: ...N6 KIN6 IRQ6 P67 CIN7 KIN7 IRQ7 AVCC P70 AN0 P71 AN1 P72 AN2 P73 AN3 P74 AN4 P75 AN5 P76 AN6 DA0 P77 AN7 DA1 AVSS P40 TMCI0 TxD2 IrTxD P41 TMO0 RxD2 IrRxD P42 TMRI0 SCK2 P43 TMCI1 P44 TMO1 P45 TMRI1 P46 PWX0 P47 PWX1 VCC1 P27 A15 P26 A14 P25 A13 P24 A12 P23 A11 P22 A10 P21 A9 P20 A8 VSS P17 A7 P16 A6 P15 A5 P14 A4 A3 P13 A2 P12 A1 P11 A0 P10 D0 P30 D1 P31 D2 P32 D3 P33 D4 P34 D5 P35 D6 P36 D7 P37 ...

Page 29: ...2 TCLK2 TCLK2 TC2 TC2 LVDS VCC TB2 TB2 TA2 TA2 LVDS GND TD1 TD1 TCLK1 TCLK1 TC1 TC1 LVDS VCC TB1 TB1 TA1 TA1 LVDS GND R10 R11 R12 R13 VCC GND R14 R15 R16 R17 G10 G11 G12 G13 G14 G15 G16 G17 B10 B11 VCC GND B12 B13 B14 LD701 C707 0 1uF R705 10J R704 4 7kJ R710 EMPTY C702 EMPTY 22uF 16V WT 1 2 RN701 10J 4 1 8 2 7 3 6 4 5 C705 150uF 25V WT RN702 10J 4 1 8 2 7 3 6 4 5 C708 0 1uF RN703 10J 4 1 8 2 7 3 ...

Page 30: ...3 4 5 6 7 8 S G S G D D D D R807 3 3kF R803 3kF F801 S1 8 C805 10uF R814 47kJ R811 47kJ C811 2200pF B LD804 R801 4 7kJ D805 PTZ3 6B C823 10uF LD808 LD813 LD801 LD811 LD814 R812 7 87kF IC803 PQ20WZ11 2 4 5 3 1 ON OFF OADJ GND VOUT VIN LD806 D807 PTZ13B C820 100uF 16V WT Q804 EMPTY DTC143EE 2 3 1 D803 PTZ6 8B C827 0 1uF CN803 B4B PH SM3 TBT 1 2 3 4 LD812 C815 470uF 16V UX C824 100uF 16V WT LD809 FB8...

Page 31: ...CHAPTER 8 PARTS LAYOUT MAIN PWB ...

Page 32: ......

Page 33: ...POWER SUPPLY PWB ...

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