Lenovo ThinkVision L1900p Service Manual Download Page 13 | Manualshive

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19" LCD Color Monitor

Lenovo L1900P

13

4.3.4 Electrical Characteristics

(1) TFT-LCD

(2) Backlight

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Summary of Contents for ThinkVision L1900p

Page 1: ...on 6 3 1 General Instructions 6 3 2 Control Button 6 3 3 OSD Menu 7 4 Input Output Specification 10 4 1 Input Signal Connector 10 4 2 Factory Preset Display Modes 11 4 3 Panel Specification 11 5 Block Diagram 14 5 1 Software Flow Chart 14 5 2 Electrical Block Diagram 16 6 Schematic 18 6 1 Main Board 18 6 2 Power Board 22 6 3 Key Board 24 7 PCB Layout 25 7 1 Main Board 25 7 2 Power Board 28 7 3 Key...

Page 2: ...ease Date Revision History TPV Model Name T9RGM6DKKCH2HC T9RGM6DMKCH2HC T9RGM6DBKCH2HC T9RGM6DCKCH2HC T9RGM6DLKCH2HC A00 Sep 25 2008 Initial release T9RGM6DJKCH2HC T9RGM6DBKCH3HC T9RGM6DBKCH4HC A01 Oct 30 2008 Add new BOM T9RGM6DBKCH5HC h t t p w w w w j e l n e t ...

Page 3: ...cteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from Lenovo Lenovo assumes no liability express or implied arising out of any unauthorized modification of design Servicer assumes all liability FOR PRODUCTS CONTAINING LASER DANGER Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM CA...

Page 4: ...19 LCD Color Monitor Lenovo L1900P 4 1 Monitor Specifications h t t p w w w w j e l n e t ...

Page 5: ...l 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 AC IN 100V 240 Power board Include adapter inverter Flat Panel and CCFL backlight Main Board DVI D SUB CCFL Drive Video signal DDC Monitor Block Diagram Key Board HOST Computer h t t p w w w w j e l n e t ...

Page 6: ...located at the front of the panel of the monitor 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 the power indicator will light up 3 2 Control Buttons 3 2 1 Key Control h t t p w w w w j e l n e t ...

Page 7: ...19 LCD Color Monitor Lenovo L1900P 7 3 3 OSD Menu The setting adjustable with the user controls are viewed through the On Screen Display OSD as shown below h t t p w w w w j e l n e t ...

Page 8: ...19 LCD Color Monitor Lenovo L1900P 8 OSD function h t t p w w w w j e l n e t ...

Page 9: ...19 LCD Color Monitor Lenovo L1900P 9 h t t p w w w w j e l n e t ...

Page 10: ...e GND VGA connector layout DVI connectors Pin No Description Pin No Description Pin No Description 1 TMDS Data 2 9 TMDS Data 1 17 TMDS Data 0 2 TMDS Data 2 10 TMDS Data 1 18 TMDS Data 0 3 TMDS Data 2 4 Shield 11 TMDS Data 1 3 Shield 19 TMDS Data 0 5 Shield 4 TMDS Data 4 12 TMDS Data 3 20 TMDS Data 5 5 TMDS Data 4 13 TMDS Data 3 21 TMDS Data 5 6 DDC Clock 14 5V Power 22 TMDS Clock Shield 7 DDC Data...

Page 11: ...anged in vertical stripes Gray scale or the brightness of the sub pixel color is determined with an 8 bit gray scale signal for each dot thus presenting a palette of more than 16 7M colors with Advanced FRC Frame Rate Control It has been designed to apply the interface method that enables low power high speed low EMI FPD Link or compatible must be used as a LVDS Low Voltage Differential Signaling ...

Page 12: ...19 LCD Color Monitor Lenovo L1900P 12 4 3 3 Optical Characteristics h t t p w w w w j e l n e t ...

Page 13: ...19 LCD Color Monitor Lenovo L1900P 13 4 3 4 Electrical Characteristics 1 TFT LCD 2 Backlight h t t p w w w w j e l n e t ...

Page 14: ...19 LCD Color Monitor Lenovo L1900P 14 5 Block Diagram 5 1 Software Flow Chat 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18 h t t p w w w w j e l n e t ...

Page 15: ...et it to green color Scalar initializes 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are there any signals coming 13 Does the scalar send out an interrupt request 14 Wake up the scalar 15 Are there any signals coming from analog port 16 Display No connection Check Signal Cable message And go into standby mode after the message disappears 17 Program the scalar to...

Page 16: ... 33 4C SAE Crystal X401 14 31818MHZ Scalar TSUM5PFHL LF Include MCU ADC OSD U401 D Sub Connector CN101 ESD U104 AZC099 04S H sync V sync RGB VGA_SCL VGA_SDA ESD U103 AZC099 04S VGA_R VGA_G VGA_B DVI Connector CN102 ESD U105 AZC099 04S RXP RXN ESD U106 AZC099 04S DAT DAT RXCP RXCN RX C P RX C N DDC_SCL DDC_SDA ESD U107 AZC099 04S HPD DVI_HPD DDC_SCL DDC_SDA h t t p w w w w j e l n e t ...

Page 17: ... Start Circuit R904 R932 R933 PWM Control IC Transformer AC input 12V ON OFF Control Feedback Circuit Transformer MOSFET Lamp ON OFF 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes CN902 Output Circuit PWM Control IC IC801 Over Voltage h t t p w w w w j e l n e t ...

Page 18: ...2_SCL 2 R136 NC DVI_5V VGA_G Q101 NC FB109 300 OHM DSUB_SCL RX1N CN102 JACK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 25 DAT2 DAT2 2 4shield DAT4 DAT4 DDC SCL DDC SDA VSYNC DAT1 DAT1 1 3shield DAT3 DAT3 5V SYNC GND HPD DAT0 DAT0 0 5shield DAT5 DAT5 clk shield clk clk GND GND C113 5pF 50V R129 10R 1 16W 5 C121 1000pF 候綼 U107 VGA_R VGA_R ESD_VCC1 RXCN RX0N 2 R112 75R 1 16W 5 ...

Page 19: ...24 25 26 27 28 29 30 PA6 LVB0M PANEL_VCC PB3 PA5 3 PA0 RXOC C301 0 1uF 16V PA9 LVACKP LVA2M RXO2 RXE1 C302 0 1uF 16V LVB3M RXEC RXO2 R302 4K7 1 16W 5 LVA0M LVB2M LVA2P LVA1P LVA3M LVB1P LVB0P LVBCKM PB5 2 C304 NC R303 10K 1 16W 5 RXO3 PB9 RXO1 PA2 RXE0 RXOC U301 NC AO4411 1 2 3 4 8 7 6 5 S S S G D D D D LVB0P LVA1M LVB3P PB4 G RXE2 PA 0 9 LVB3M S PPWR_ON 2 PB 0 9 PB2 RXEC LVA1P RXE3 LVA3P LVBCKP L...

Page 20: ...mber 16 2008 称爹 4 0 POWER G2883 1C 3 X 13 080916 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬隔瓜絪腹 R709 NC adj_BACKLIGHT 2 VCC3 3 PANEL_ID 2 R710 NC VCC3 3 FOR EMI PANEL_ID C705 0 1uF 16V R704 4K7 1 16W 5 DSUB_5V R702 10K 1 16W 5 on_BACKLIGHT 2 Mute 2 R708 NC VCC3 3 C701 0 1uF 16V CMVCC VCC3 3 CMVCC VCC1 8 BKLT EN C707 100uF25V DGND...

Page 21: ... September 16 2008 称爹 5 0 SCALER G2883 1C 3 X 13 080916 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬隔瓜絪腹 R402 NC DSUB_G 1 LED_ORANGE PB4 PB8 R441 10K 1 16W 5 VCC1 8 POWER_KEY FB404 300OHM R406 NC C420 47pF VCC3 3 VPLL R420 120R 1 16W 5 DSUB_R 1 VDDP DSUB_B 1 PB3 C418 0 1uF 16V RX1N 1 DET_CABLE 1 VCC3 3 C408 0 1uF 16V C431 1000PF LV...

Page 22: ...DIM R931 8K2 1 8W C910 1000pF BD901 2KBP08M 2 1 3 4 L904 1 1uH 5V FB901 BEAD 1 2 C925 NC C911 1uF 25V C939 1000uF25V R929 1K 1 4W C909 0 22uF 50V PWPC8921LQBZ 1 L1900 B 1 3 715G2664 1 2 称爹 01 Cov er G2664 1 2 X 1 080901 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬隔瓜絪腹 T901 POWER X FMR 4 7 9 5 6 4 6 11 10 8 12 1 3 R962 100 1 4W R961...

Page 23: ...TC CT RT GND C1 E1 E2 C2 VCC OUTPUT CTRL REF 2IN 2IN R827 3 6K OHM 1 1 10W R831 2 4K 1 1 10W C824 0 1uF C803 1000pF C801 15pF 6KV C842 0 01uF R811 10K 1 10W D813 IN4148W R805 10K 1 10W Q802 AM9945N T1 PF 1 2 3 4 8 7 6 5 S G S G D D D D R810 51K 1 1 8W D817 IN4148W R829 22R 1 8W R853 68K 1 1 10W R809 3 6K 1 1 10W B Q804 PMBS3906 1 2 3 R818 1K 1 10W 1 R865 NC C817 NC DIM CN801 CONN 1 2 JR801 0R05 1 ...

Page 24: ...L PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬隔瓜絪腹 ZD007 NC MM3Z5V6B R007 SGND N C 4 ZD001 NC SGND SW002 SGND ZD004 ZD002 MM3Z5V6B R007 NC R008 3 3 1 435V C010 1000PF 10 LEFT N C SGND LBADC1 SGND R001 NC C008 0 1uF LED RIGHT LBADC2 SW001 R003 N C 1 LED_YELL ZD009 MM3Z5V6B R002 3 KOHM 1 1 10W 1 LED MIDDLE GREE SGND RIGHT AUTO POWER 4 SGND ZD006 MM3Z5V6B SGND LED_GRN AUTO 1 4...

Page 25: ...19 LCD Color Monitor Lenovo L1900P 25 7 PCB Layout 7 1 Main Board 715G2883 1 6 h t t p w w w w j e l n e t ...

Page 26: ...19 LCD Color Monitor Lenovo L1900P 26 h t t p w w w w j e l n e t ...

Page 27: ...19 LCD Color Monitor Lenovo L1900P 27 h t t p w w w w j e l n e t ...

Page 28: ...19 LCD Color Monitor Lenovo L1900P 28 7 2 Power Board 715G2664 1 2 h t t p w w w w j e l n e t ...

Page 29: ...19 LCD Color Monitor Lenovo L1900P 29 h t t p w w w w j e l n e t ...

Page 30: ...19 LCD Color Monitor Lenovo L1900P 30 h t t p w w w w j e l n e t ...

Page 31: ...19 LCD Color Monitor Lenovo L1900P 31 7 3 Key Board 715G3282 1 h t t p w w w w j e l n e t ...

Page 32: ... 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 h t t p w w w w j e l n e t ...

Page 33: ...ook if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Reinsert or check the Adapter Inverter section X401 oscillate waveforms are normal Replace U701 Q702 Q703 Replace U401 Replace X401 OK OK OK NG NG NG NG Measure U701 PIN2 3 3V Measure Q703 Vcollector 1 8V h t t p w w w w j e l n e t ...

Page 34: ...e Q703 Vcollector 1 8V Check Correspondent component Replace U401 X401 oscillate waveform is normal Replace U701 Q702 Q703 OK OK OK OK OK NG NG NG NG Check reset circuit of U401 is normal Check HS VS from CN101 is normal Replace X401 Check Correspondent component NG NG OK Replace U401 X401 oscillate waveform is normal h t t p w w w w j e l n e t ...

Page 35: ...01 are broken or CN301 solder Check Correspondent component Replace Panel Check Correspondent component Replace U401 OK OK Replace X401 OK NG NG NG NG Check reset circuit of U401 is normal OK X401 oscillate waveform is normal Measure Q302 base is low level h t t p w w w w j e l n e t ...

Page 36: ...901 over current protect circuit Check CN902 pin4 5 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 Check start voltage for the pin8 of IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V OK OK NG Check Q901 ZD921 ZD922 D915 D916 IC903 and IC904 OK Check IC901 pin6 PWM wave OK Check IC901 NG NG NG OK NG h t t p w w w w j e l n e t ...

Page 37: ...ce board NG OK Check IC801 PIN12 12V NG OK Change Q808 Q805 Check IC801 PIN10 9 have the output of square wave at short time NG OK Change IC801 Check Q802 PIN5 6 7 8 have the output of square wave at short time NG OK Check Q801 Q804 Q811 Q812 and Q802 Check the output of T801 Check connecter lamp OK NG Change T801 h t t p w w w w j e l n e t ...

Page 38: ... Board OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch Y N N Is Key Pad Board normally Replace Key Pad Board Y N Y Check Main Board h t t p w w w w j e l n e t ...

Page 39: ...fault color Default color temp parameter is x 302 20 y 318 20 Y 180 20cd m2 C MEM CHANNEL 9 9300K Bluish color Bluish color temp parameter is x 283 20 y 297 20 Y 180 20cd m2 D MEM CHANNEL 10 sRGB color sRGB color temp parameter is x 313 20 y 329 20 Y 180 20cd m2 3 Into Factory mode of Lenovo L1900P_4431 HE1 HS1 Press the MENU button pull out the power cord and then plug the power cord Then the fac...

Page 40: ... x 283 20 y 297 20 Y 180 20cd m2 4 Adjust the RED on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet the tolerance 100 2 D Adjust sRGB ...

Page 41: ...19 LCD Color Monitor Lenovo L1900P 41 10 Monitor Exploded View h t t p w w w w j e l n e t ...

Page 42: ...H 260MM 0M1G 130 6120 SCREW M3X6 0M1G1730 6120 SCREW 42 D020523 0M1G2940 8225 CR3 SCREW E750 750GLG190E8J11N0LX PANEL LM190E08 TLJ1 KR LGD E750 750GLG190E8J23N0LX PANEL LM190E08 TLJ2 GZ LGD 2nd source 756GQ8CB LL015 MAIN BOARD CBPCRM6G9QA U402 056G1133 81 SST25LF020A 33 4C SAE SMTCR U402 100GLMG9003N11 MCU ASS Y 056G1133 81 040G 45762412B CBPC LABEL CN402 033G3802 6 WAFER CN701 033G3802 9 WAFER 9P...

Page 43: ... 662502 IC ESD AZC199 04S SOT23 6L U403 056G1133 32 IC M24C04 WMN6TP SO8 U402 056G1133 81 SST25LF020A 33 4C SAE U701 056T 585 4A AP1117E33LA Q701 057G 417 12 T KEC 2N3904S RTK PS Q302 057G 417 13 T KEC 2N3906S RTK PS Q702 057G 417 22 T TRA KN2907AS 60V 0 6A SOT 23 Q703 057G 417 22 T TRA KN2907AS 60V 0 6A SOT 23 Q701 057G 417511 MMBT3904 Q302 057G 417512 MMBT3906 Q301 057G 763 1 A03401 SOT23 BY AOS...

Page 44: ...1 RST CHIPR 100 OHM 5 1 16W R706 061G0402102 RST CHIPR 1 KOHM 5 1 16W R104 061G0402102 RST CHIPR 1 KOHM 5 1 16W R103 061G0402102 RST CHIPR 1 KOHM 5 1 16W R705 061G0402103 RST CHIPR 10 KOHM 5 1 16W R703 061G0402103 RST CHIPR 10 KOHM 5 1 16W R702 061G0402103 RST CHIPR 10 KOHM 5 1 16W R442 061G0402103 RST CHIPR 10 KOHM 5 1 16W R441 061G0402103 RST CHIPR 10 KOHM 5 1 16W R440 061G0402103 RST CHIPR 10 K...

Page 45: ...16W R108 061G0402750 RST CHIPR 75 OHM 5 1 16W R102 061G0603000 RST CHIPR 0 OHM 5 1 10W FB403 061G0805000 F RST CHIPR 0 OHM 5 1 8W FENGHUA R305 061G0805000 F RST CHIPR 0 OHM 5 1 8W FENGHUA R403 061G0805000 F RST CHIPR 0 OHM 5 1 8W FENGHUA R701 061G1206000 RST CHIPR 0 OHM 5 1 4W R301 061G1206331 RST CHIPR 330 OHM 5 1 4W C107 065G0402102 32 1000PF 10 50V X7R C121 065G0402102 32 1000PF 10 50V X7R C122...

Page 46: ... 16V X5R C410 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C409 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C104 065G0402220 31 CHIP 22PF 50V NPO C103 065G0402220 31 CHIP 22PF 50V NPO C423 065G0402224 17 CAP CER 0 22UF 20 80 C401 065G0402224 17 CAP CER 0 22UF 20 80 C421 065G0402470 31 MLCC 0402 CAP 47PF J 50V NPO C420 065G0402470 31 MLCC 0402 CAP 47PF J 50V NPO C102 065G0402473 12 CHIP 0 047uF 16V X7R C1...

Page 47: ...LE PITCH 2 0 SW004 077G 602 1 CJ TACT SWITCH SW005 077G 602 1 CJ TACT SWITCH SW001 077G 602 1 CJ TACT SWITCH SW002 077G 602 1 CJ TACT SWITCH SW003 077G 602 1 CJ TACT SWITCH LED001 081G 121C1 GP LED GP32032CE P310 ZY 50 HB R008 061G0603000 RST CHIPR 0 OHM 5 1 10W R003 061G0603180 1F RST CHIPR 1 8 KOHM 1 1 10W R005 061G0603180 1F RST CHIPR 1 8 KOHM 1 1 10W R002 061G0603300 1F RST CHIPR 3 KOHM 1 1 10...

Page 48: ...5G305M1022BP Y2 1000PF M 250VAC Y5P C921 065G306M4722BP 4700PF 20 400VAC C905 067G 40J10115K EC CAP 100uF 450V 18 35mm C802 067G215D4714KV E C 105 CAP 470UF M 25V ED SERIES C917 067G215D6814KV CAP 105 680uF M 25V C918 067G215D6814KV CAP 105 680uF M 25V C939 067G215S1024KV EC 105 CAP 1000UF M 25V C915 067G215S4713KV EC 105 CAP 470UF M 16V L901 073G 174 65 H1 LINE FILTER 26mH MIN L901 073G 174 65 N1...

Page 49: ... PHILIPS SMT 06 Q802 057G 600 55 P5506 HVG SO 8 Q810 057G 759 2 RK7002 Q809 057G 759 2 RK7002 Q808 057G 760 4B PDTA144WK SOT346 Q805 057G 760 5B PDTC144WK SOT346 Q802 057G 763 14 AM9945N R818 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R821 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R822 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R824 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R826 061G0603100 1F RST CHIPR 1 K...

Page 50: ...1 10W R807 061G0603680 2F RST CHIPR 68K OHM 1 1 10W R837 061G0603680 2F RST CHIPR 68K OHM 1 1 10W R841 061G0603680 2F RST CHIPR 68K OHM 1 1 10W R853 061G0603680 2F RST CHIPR 68K OHM 1 1 10W R804 061G0805101 1ST CHIPR 100 OHM 5 1 8W R911 061G0805102 RST CHIPR 1K OHM 5 1 8W R917 061G0805102 RST CHIPR 1K OHM 5 1 8W R929 061G0805102 RST CHIPR 1K OHM 5 1 8W R938 061G0805103 RST CHIPR 10K OHM 5 1 8W R91...

Page 51: ...HM 5 1 4W R902 061G1206684 RST CHIPR 680K OHM 5 1 4W R901 061G1206684 RST CHIPR 680K OHM 5 1 4W C819 065G0603103 12 CHIP 0 01UF 16V X7R C823 065G0603103 12 CHIP 0 01UF 16V X7R C834 065G0603103 12 CHIP 0 01UF 16V X7R C842 065G0603103 12 CHIP 0 01UF 16V X7R C924 065G0603103 12 CHIP 0 01UF 16V X7R C825 065G0603104 22 CAP CHIP 0603 0 1UF K 25V X7R C821 065G0603104 22 CAP CHIP 0603 0 1UF K 25V X7R C807...

Page 52: ...93G 64S511SEM 1N4148W CN901 006G 31500 EYELET NR901 006G 31502 1 5MM RIVET IC904 056G 158 7 AP431V TO 92BY ATC IC904 056G 158 12 KIA431A AT P TO 92 C938 065G 2K152 1T GP CERAMIC CAP C906 065G 2K152 1T6921 1 5NF 2KV Y5P 10 C908 067G215Y2207KT CAP 105 22UF M 50V KINGNICHI FB901 071G 55 29 FERRITE BEAD F901 084G 55 1W FUSE 4A 250V Wickmann D901 093G 6038P52T PS102R D900 093G1100 1152T DIODE PR1007R 1...

Page 53: ...ONITOR Q45G2007M0203A PE BAG FOR LENOVO Q50G 505 24 TIE Q52G 1185 95 BIG CARTON TAPE FOR LENOVO S89G179T30NA08 LVDS ASSY 089F80001803AG 1 0 30 2 5 180 3 0 65 0 05 033F303FH10BK3 F1010HA 30P BK 033F303FJSHK30 1 0S 19 30A Q41G780060838A STW Q70G9000608 3A CD MANUAL 040G 58162435A P N LABEL FOR MANUAL PE BAG 040G 582625 2A S N LABEL 040G 582625 3A S N LABEL Q40G 19N60843A RATING LABEL Q40G 19N60844A ...

Page 54: ...SB POWER CORD 045G 76 28IB2 PE BAG FOR MANUAL Q41G780062523B WARRANTY CARD Diversity of T9RGM6DBKCH3HC Compared with T9RGM6DKKCH2HC Location Part No for TPV Description Remark 041G780062521A 1 PAPER 041G780062522A COE 089G401A18NLSB POWER CORD Q41G780062523B WARRANTY CARD 045G 76 28IB2 PE BAG FOR MANUAL Diversity of T9RGM6DBKCH34HC Compared with T9RGM6DKKCH2HC Location Part No for TPV Description ...

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